bluuebunny/crossref_metadata_2025 huggingface dataset:
Towing Operations on the Ultra-Deep Drilling Platform Sevan Driller
Authors: Zong Jian Gang , Yang Chao Jun , Guan Chun Song , Tu Yan , Xu Hao
Published: December 2010

Towing the ultra large ships without power is one of the difficult and high-risk navigation operations in the Yangtze River and coastal waters, where the ship flow is large and navigation environment is complex. For towing operations, the environmental, hydrological and meteorological factors should be taken into consideration. Firstly, making detailed towing programs is essential. The towing programs include the towing routes choice, the arrangement of tugboats and ropes. Then the towing experiment on the ultra-deep drilling platform Sevan Driller are carried out, and the security measures and urgent arrangements in the special environment are analyzed in detail. Through the towing work of the ultra large cylindrical offshore drilling platform with unpowered devices, experience and guidance could be provided for the same types of ships in the future.
Analysis on Low Temperature Cold Starting Performance of Parallel Hybrid Electric Vehicle with Ultra-Capacitor
Authors: Zhou Jian Hao , Du Jia Yi , Yuan Yin Nan , Zhang Deng Pan
Published: December 2010

Assessment test on low temperature cold starting performance of Parallel Hybrid Electric Vehicle (PHEV) with ultra-capacitor was carried out in the testing environmental warehouse which can provide constant temperature from -20°C to 0°C. The study focused on: hardware performance of multi-energy management system (MEMS), output torque of Integrated Starter and Generator (ISG) when it was in electric or power generation state, the voltage and current characteristic of its bus bar and the voltage dropping characteristics of ultra-capacitor during charging and discharging process. The experimental results showed that impact starting mode can improve the starting performance of PHEV at low temperature.
Circuit Testing System of Vehicle Fuse Box Based on LabVIEW
Authors: Li Ya , Zhang Zhen Huan
Published: December 2010

Vehicle fuse box is an important unit for protecting circuit of vehicle, consequently its quality should be strictly guaranteed. In this paper a steady testing system is designed based on LabVIEW in the structure of double state machines, which is with functions such as data acquisition, testing information display, failure analyzing and data saving. As a result, effectiveness of testing is highly enhanced by applying it into practice.
Workspace Analysis and Simulation of 3-PCR Parallel Mechanism
Authors: Hao Xiu Qing , Xu Zong Gang , Cai Kai Yun
Published: December 2010

Inverse position equations of 3-PCR parallel mechanism were obtained by coordinate conversion method, based on the influence factors to the workspace of parallel mechanism, workspace volume under a certain size was worked out with method of polar coordinates boundary searching. According to mathematical model, using MATLAB software, solid figure and cross-section diagram of the mechanism in a certain range of size were presented. Finally, characteristics of workspace were analyzed through diagrams. Workspace analysis can provide necessary preconditions for the design and manufacture of parallel mechanism.
The Pattern Management Mathematical Method of Computer Flat Knitting Machines Based on Embedded Processor
Authors: Han Qiang , Hou Pei Wei
Published: December 2010

Computer flat knitting machine (CFKM) is a kind of high-technology knitting equipment, which integrates computer science, mechatronics technology and knitting technics. The paper anatomized the structure of data information of the CFKM, carefully discussed the pattern management mathematical method of the data processing and then put forward the implementation of pattern management mathematical method in embedded processor.
Design and Application of Self-Tuning PI Controller
Authors: Kong Xiao Hong , Zhang Bao Jian , Mao Xin Hua , Chen Yan Feng , Song Chang Yuan
Published: December 2010

The permanent magnet synchronous motor (PMSM) is popularly used in many application fields for such advantages as having the speed-torque characteristics similar to that of a DC motor. Nevertheless, the overall performance of the PMSM is largely dependent on that of the control system. The classical PID controller, which has acquired wide applications in many fields, is only suitable for the design of the linear system and cannot meet the requirements of the nonlinear system like the PMSM. In this paper, a compound control system combining the classical PID control and the fuzzy control is presented to meet the requirements of control system. Simulation results show that the fuzzy PI controller has better performance than that of the classical PI controller.
Numerical Simulation Research of the Effect of Injection Pressure on Diesel Engine with High-Pressured Common Rail System
Authors: Li Jie Hui , Yan Bing Cheng , Guo Lin Shan , Chen Chang Jun
Published: December 2010

Through combustion’s numerical simulation of the diesel engines with the high-pressured common rail system (Common-rail), this article researches the effect of injection pressure on the heat release rate, the emission quantity of nitrogen oxide and particulate matter. The results show that the advance of injection pressure could improve power and fuel economy performance. In order to reduce the emission quantity of nitrogen oxide and particulate matter, the earlier combustion should be controlled appropriately, when we enhance the injection pressure of Common-rail.
Mode Selecting Control of Interior Permanent Magnet Synchronous Motor for Full Speed Range Operation
Authors: Wu Zhi Hong , Wu Si Bei , Zhu Yuan , Tian Guang Yu
Published: December 2010

The paper presents a new method for mode selecting which includes constant torque mode and flux-weakening mode. The proposed method modifies the working modes not by LUT (look-up table), but by the size of T0. Attractive features of this state transition technique include no dependency on the machine parameters, the least calculated quantities, making full use of the source voltage of the battery, and smooth and fast transition into and out of the flux-weakening mode. Simulation results at various operating conditions are presented to verify the feasibility of the proposed mode transition scheme.
Guard Robot Alarm System Design Based on GPRS
Authors: Sun Li Ning , Li Mao Hai , Chen Tao
Published: December 2010

This paper designs guard robot alarm system using GPRS technology. An interesting communications infrastructure for remotely accessing is offered based on GPRS, which can control and interact with robots in an integrated and highly portable manner. In recent years the GPRS network provides wireless access of internet for mobile phone which becomes the most important and common terminal equipment. Therefore, the alarm information is designed to send to the user’s mobile phone through GPRS networks, and man-made intervention is added to the system, thus a more reliable and convenient alarm system is implemented. The system mainly consists of two parts: detection of abnormal and dangerous situation in domestic environment and sending the alarm information as MMS form to the user’s phone via GPRS networks.
Design and Analysis on a Kind of Oblique-Cone-Slid-Ring Assembly Seal Device with Self-Compensation to Seal Wear in Carbide Actor
Authors: Hu Yong , Yan Wei , Wen Hua Bing , Wen Chuan Shun
Published: December 2010

We design and analyze a kind of oblique-cone-slid-ring (OCSR) assembly seal device used in carbide actor that can self-compensate the seal wear. The effect of the OCSR thickness variation on the contact stress, Von mises stress, and spring force is analyzed using ANSYS software. It shows that the OCSR assembly seal device can seal well and has the function of self-compensation to seal wear when the OCSR thickness vary during the experiment conditions given. The max contact stress on the seal surface and other contact face is higher or much higher than the work stress of sealed medium. That means the design is satisfied with the user demand. The results provide a theoretical base for the further study and applications of the OCSR assembly seal device.
Nonlinear Dynamics of a Parametrically Excited Laminated Beam: Narrow-Band Random Excitation
Authors: Lan Xiang Jun , Feng Zhi Hua , Zhu Xiao Dong , Lin Hong
Published: December 2010

The first mode parametric resonance of a laminated beam subject to narrow-band random excitation is taken into consideration. The method of multiple scales is used and the stochastic jump and bifurcation have been investigated aiming at the stationary joint probability of the response of the system by using finite difference method. Results show that stochastic jump occurs mainly in the region of triple valued solution. The higher is the frequency, the more probable is the jump from the stationary nontrivial branch to the trivial one, whereas the most probable motion gradually approaches the trivial one when the band width becomes higher.
Analysis and Simulation of a New Integrated Printing and Drying Machine
Authors: Yuan Jun Tao , Wei Rui Yuan
Published: December 2010

This paper has a research on a novel integrated printing and drying machine. The machine is used to print the LOGO on the products. Two ways of printing are introduced in this paper and the screen printing is chosen. The drying machine is also introduced and the drying process is simulated by CFD software. The result of the simulation tells us the temperature distribution of the ABS panel surface. Compared with the experimental datas, the simulation result is proved correct. With this simulation model, we can determine rational parameters of drying machine.
A Numerical Approach for Harmonic Retrieval and its Application in Motor Vibration Fault Diagnosis
Authors: Yang Long Xing , Chai Hua Wei
Published: December 2010

A numerical parameter match approach for harmonic retrieval is presented to improve the demerits of harmonic retrieval methods, such as complicated calculation, low precision and false frequency appearance. The theory deduction and computer simulation are given to show the validity of the approach, and the implementary steps are offered. Based on the characteristics of the motor vibration fault signals exhibiting cyclostation and harmonic information, the numerical harmonic retrieval method can not only search fixed frequency but also match fault characteristic frequency. By the amplitude modulation fault examples, the degrees of modulation variation are employed to validate the availability of the approach in rotating machinery fault diagnosis.
Research on the New Double-Wave-Bands Treatment System
Authors: Li Zhi Xiang , Hu Wen Fei
Published: December 2010

Presently for single function and high cost of the phototherapy equipments, this paper introduces a kind of Double-Wave-Bands therapeutic apparatus, which fully utilizes the principle of near-infrared wavelengths treating various pains and UVC sterilizing. This apparatus uses two different kinds of wave bands by selecting different light sources, but a set of control system. Because of a machine with multi-purpose and less cost, this apparatus can treat all forms of disease safely and effectively through using output light of the optical system by various forms of curing probes to be helpful for a promotion.
Cartridge-Case Extracting Analysis of some Breech Mechanism Based on Flexible Body Dynamics Method
Authors: Tang Wen Xian , Zhang Jian , Zhang Pan
Published: December 2010

Dynamic characteristics of the breech mechanism directly affect warship’s reliability. Most of the research on the breech mechanism is related to locking chamber and firing primer, while few articles are found out about extracting cartridge-case. In this paper, nonlinear finite element method is used to research on flexible body dynamics of the breech mechanism. At first, structure and cartridge-case extracting process is analyzed. Then stresses and case speeds caused during the extracting process are tested. Flexible body dynamics model of some breech mechanism is built by using PROE, Hypermesh and ABAQUS software. Three models are used to compared with the experiment, which include three different element types. Finally, kinetic energy, internal energy, extractor stresses and case average speed are analyzed after wear of the extracting template.
Deployment with Sampling Coverage in Three-Dimensional Wireless Sensor Networks
Authors: Jiang Zhong Qiu , Yan Shu
Published: December 2010

Node deployment is one of important questions in three-dimensional wireless sensor networks(3D WSNs) for the mountain monitoring. In this article, sampling coverage is proposed,and node deployment with sampling coverage is abstracted to mathematical spacing-filling study. The solving method is verified in two-dimensional wireless sensor networks(2D WSNs) firstly,then it is extended to 3D WSNs.Several space-filling polyhedrons are used to fill three-dimensional solid space,and volume entropy is defined to evaluate space-filling perfermance. We can use the minimum nodes to constructe 3D WSNs if choose the vertexes of truncated octahedron to set nodes. That deployment method can both achieve seamless sampling coverage and high connectivity based on computer simulation.
Antifriction Effect of Micro-Deep Holes for Higher Pair Components
Authors: Song Ai Ping , Gao Shang , Huang Jian Wei , Zhang Li Feng
Published: December 2010

Higher pair contacting components is worn more severely than lower pair contacting components due to the larger contact stress on the contact line. To improve antifriction of higher pair contacting components, the paper proposes a new method by which a large number of micro-deep holes are fabricated on the surface of the contacting component. When higher pair operates, contact stress near the contact line will cause obvious elastic deformation and the volume of the micro-deep holes near the contact line will change, resulting in absorbing oil and squeezing oil. Then an oil film with certain pressure is generated around the micro-deep holes, which will improve the lubrication of components greatly. In addition, a test is carried out and its result shows that the cylindrical roller with micro-deep holes performed better in terms of antifriction than the smooth cylindrical roller.
Experimental Research on the Surface Roughness Characteristics in Ultrasonic Vibration Lapped Surface of Titanium Alloy
Authors: Zhu Lin , Li Ji Yun
Published: December 2010

Based on the machining principle of ultrasonic vibration lapping, the surface roughness characteristics of plastic difficult-to-machine titanium alloys are studied through experiments using self-developed ultrasonic vibration lapping device. And the effects of workpiece speed, ultrasonic amplitude and grain size on surface roughness were researched by using single-factor testing way. The research results show that surface roughness is decreased to a certain extent for the assistance of ultrasonic vibration. The corresponding results provide certain reference value for the optimization of processing parameter in ultrasonic vibration lapping.
Study on the Clearance of Impeller and Draft-Tube on Stamping and Welding Multistage Centrifugal Pump
Authors: Liu Yuan Yi , Li Rui Guang
Published: December 2010

Based on the Renault-averaged Navier-Stokes equations and a standard turbulence model, the different clearance of the outer edge on the impeller and the draft-tube is simulated by the commercial software CFX, in order to achieve optimal performance. The velocity distributions and pressure distributions within the stamping and welding multistage centrifugal pumps are analyzed. The reasonable clearance value which impact on its performance and properties have been discovered. This paper is helpful to improve the design theory of stamping and welding multistage centrifugal pumps.
Monitoring Method of Stray Current in Coal Mine on Optical Fiber Sensing Technique
Authors: Cai Li Hua , Li Wei , Fang Hai Feng
Published: December 2010

In this work a novel monitoring method was developed to measure the underground stray current in coal mine with fiber current sensing technique. According to the theory of optical fiber current sensor based on Faraday magneto-optic effect, a fiber sensing system was designed and the relative experiments with current generator simulating stray current were completed. The results indicate that the measurement was influenced by birefringence and temperature change. The sensing heads with high cylindrical birefringence optical fiber had a good suppressing effect on linear birefringence and the polarization state of polarized light was also more stable than that with low birefringence optical fiber. The fiber current sensing method is doable in underground stray current monitoring system in coal mine.
Study on MEMS Microgripper Integrated Vacuum Tool
Authors: Chen Tao , Chen Li Guo , Pan Ming Qiang , Sun Li Ning
Published: December 2010

This paper presents a hybrid type of microelectromechanical systems (MEMS) microgripper integrated with an electrostatic mechanism and vacuum technology. Vacuum tools are integrated in this microgripper in order to achieve a reliable and accurate manipulation of microobjects. The microgripper is fabricated by a surface and bulk micromachining technology. The pick and release micromanipulation of microobjects is accomplished by electrostatic driving force caused by comb structure and an auxiliary air pressure force from air pump. The performance of this new hybrid type of microgripper is experimentally demonstrated through the manipulation of 100–200μm polystyrene balls. Experimental results show that this microgripper can successfully fulfill the pick and release micromanipulation.
Networked Information Integrated Service Platform for Gear Enterprise
Authors: Li Ju Bo , Deng Xiao Zhong , Li Tian Xing
Published: December 2010

In order to accelerate the information construction of gear enterprise and implement information integration and sharing among various application systems, a functional architecture of networked information integrated service platform for gear enterprise networked manufacturing is proposed. The construction and exploitation of the service platform are implemented with the technology of Service Oriented Architecture (SOA) and Web services. Finally, example of actual hypoid gear networked manufacturing is introduced to demonstrate the practicability of the proposed platform. The successful experiment also proves that the proposed platform can commendably meet the needs of information integration and data sharing for gear enterprise.
Design of Magnetic Fluid Sealed Structure for the High-Speed Non-Woven Loom Needle Spindle
Authors: Huang Jing Fei , Rui Yan Nian
Published: December 2010

The oil seal of the high-speed non-woven loom needle spindle is a difficult problem, which has always been probed among the product manufacturer and the users. A new structure, the micro-nanon magnetic fluid seal plus the packing seal, is designed in this paper. It is suitable for the high-speed linear reciprocating spindle. The new structure is applied to the practical production. Through the productive experiments, the reliability of the structure is further optimized. So the reliability problem of the needle spindle oil seal is well solved.
Modeling and Control of Unmanned Trimaran Vehicles
Authors: Peng Yan , Liu Mei , Huang Qing Jiu , Luo Jun
Published: December 2010

The modeling and sea trials of the Unmanned Trimaran Vehicles (UTSV) are presented in this paper. For control design, six DOF dynamic modeling of autonomous Trimarans is presented. The detailed mathematical modeling is intended to provide the appropriate framework for a control design which explicitly addressed the six DOF UTV dynamics. A control system was developed based on backstepping to guide the vessel to track desired trajectories based on the input of the sensors. Physical experiments were conducted to determine the maneuvering property of UTV.
Research on Reverse Design of the Cam Mechanism
Authors: Liu Min Fei , Qian Zhi Liang
Published: December 2010

In view of the reverse design of planar cam mechanism, the measurements of cam contour are smoothed by the discrete energy law in order to ensure the dynamic performance. The cam profile is fitted by three non-uniforms B-spline according to the features that cam contour is a closed curve and its measurements are distributed non-uniformly. Based on the above, the expressions of displacement, speed, and acceleration of the follower in form of polar radius of profile and its first and second derivative are derived. Finally, a reverse design example is given, the effectiveness of the method is verified.
Design of Cam Profile Based on Miller-Cycle
Authors: Wei Sheng Li , Long Wu Qiang , Wang Zhong , Leng Xian Yin
Published: December 2010

The necessity which high-order polynomials are used for optimization design of cam profile is analyzed in valve train of high-speed engines. Basing on the basic idea of Miller-cycle delayed intake valve closing time to reduce the compression ratio, this method is used for re-optimize design of the cam profile in CY4D47 diesel engine. The general method is given by the five-order polynomial. So, the improved cam profile equations can be obtained, then, the lift, velocity, acceleration and Jerk curves are got, lastly, the cam profile are drew by AutoCAD soft.
Simulation of the Application of Pneumatic Propulsion Method in Tourist Submarine
Authors: Li Bin Cheng , Han Bing
Published: December 2010

In order to realize propulsion system and oxygen system of tourist submarines be secure, eco-friendly, efficient, reliable, economical, a combination of ordinary air motor and ACM high-pressure air bottle is adopted for providing propulsion and oxygen. The calculation and selection of the appropriate air motor and high-pressure bottle are based on the propulsive requirement of a tourist submarine. A model consists of high-pressure bottle, air motor, propeller and the resistance of the tourist submarine is established in SimulationX. The underwater speed and it’s duration are obtained through calculation as the rev, thrust force, torque of the propeller, etc. The possibility of application of pneumatic propulsion method in tourist submarine is analysed. Results illustrate that: on the premise of lightened quality of the propulsion system, pneumatic propulsion method fulfills the required underwater speed and it’s duration.
Crack-Propagating Direction of Tire Bead Rubber Determined by Jmax Criterion
Authors: Zhu Chang Shun , Wang Guo Lin , Li Ping Ping , Chen Shang Wei
Published: December 2010

Three-dimensional crack propagating path of tire bead rubber was the premise to study the crack propagation direction of bead. For this reason, Jmax Criterion was put forward. Utilized J integral maximum (Jmax) to determine the crack propagation direction of rubber. Calculated J-integral values of different preset directions by Abaqus built-in algorithm, obtained J (θ) curve which showed the Jmax and direction angle (θ) by fitting simulation data. Using Abaqus to set up two different crack model of bead rubber and simulate the crack propagation path, the results was consistent with the real crack propagation direction of specimen test, validated the applicability of Jmax Criterion..
The Research on the Fuel Performance of Fsae EFI Engine
Authors: Zeng Ling Jun , Huang Hong Wu
Published: December 2010

For the modeled engine, the soft AVL-BOOST is applied to do the single-dimensional cycling simulation and calculation. And then the engine performance after assembling the improving limiter（its diameter is 20mm） is analyzed. According to the calculation and analysis, the torque and pneumatic efficiency are largely affected by limiter, the maximum torque and pneumatic efficiency decreases 20 percents and 30 percents respectively. The limiter not only improves the engine’s fuel performance, but also reduces its power performance.
Kinematics Simulation Analysis of Turn-Milling Center Based on Virtual Prototype
Authors: Zhu Li Da , Pei Jia Ying , Yu Tian Biao , Wang Wan Shan
Published: December 2010

In order to analyze the motion characteristics of turn-milling center, it’s prototype is modeled and spiral motion is simulated and analyzed to get curves of displacement and velocity in forward kinematics and inverse kinematics. The rationality and applicability of mechanism design is verificated to provide the basis of fast optimized design of turn-milling center. So the method can forecast and improve before physical prototype manufacturing to ensure design feasibility and save development time.
Pan-CRM in the Environment of CPC
Authors: Wei Bo , Jing Xu
Published: December 2010

In the environment of CPC, CRM has already evolved from a kind of marketing tool which mainly faces to the sale management into a manufacturing principle which covers the whole production line from the product creativity to the terminal consumer. Based on the Internet, the Pan-CRM concerns and satisfies customer's changeful and characteristic needs, integrates the related personnel of product life cycle to a common body under the premise maximizing common values. So the core manufacturer gets free gathering innovation, and the special requests of consumers are realized as far as possible.
Dual-Pump Gradient System Based on Chromatograph
Authors: Sun Xue Ping , Liu Wen Jie
Published: December 2010

The application of gradient elution in high performance liquid chromatography brings great convenience to separation of organic compounds. It has now become an important part of high performance liquid chromatography. How to achieve gradient elution is the key problem in separation of organic compounds. This paper discusses Dual-pump Gradient System which is used to achieve gradient elution and improve separation efficiency.
Conceive and Design of a Six Dimensional Signals Acquisition Device
Authors: Zhang Yan Fei , Gong Jin Liang , Wei Xiu Ting
Published: December 2010

For most transducers, the two kinds of displacement and angular variants can not be captured at the same time. While for the unrestricted object, it often translates and rotates synchronously. For some important or special application fields, it is becoming more and more important to find a way to acquire all the six motion signals concurrently. Based on the parallel robot technology, a novel type of this kind of device is brought forth. It is composed of the end-effector, the stationary platform, and six sub-chains. It can translate along and rotate around any one of the three axes. Main structure and operation principle of this device are both described and analyzed. Measurement circuit system is designed and how to handle the twelve input signals is also explained. Finally the program flowchart and simulation examples are given.
Double Inlet Cyclone Separators for Natural Gas Dehydration
Authors: Yang Yan , Li Zi Li
Published: December 2010

The fluid flow in the double cyclone separator is numerical simulated, using the Navier-Stokes equations with the Reynolds stress model (RSM). The basic parameters of gas flow are obtained as functions of radius such as the tangential velocity, the axial velocity and the static pressure. The numerical results show that in the cyclones water liquids are centrifuged onto the walls and removed from the natural gas due to the strong centrifugal field, while the natural gas stays in the central region and moves out from the up-outlet. The water can be well removed from the natural gas.
Shrinkage Analysis of Injection-Compression Molding for Transparent Plastic Panel by 3D Simulation
Authors: Li Yi Chao , Zhang Yi Sheng , Li De Qun
Published: December 2010

Injection molding which is adopted to fabricate transparent plastic panel has merits such as high efficiency and low cost, and is being used widely. However, at the end of injection molding process, product may be affected by uneven shrinkage and as a result, bring defects such as warp to the final part. This can greatly damage its mechanical and optical quality. Injection-compression molding(ICM) can significantly minimize these defects. In the present paper, 3D model and coupled calculation method of flow, temperature and pressure are used to simulate the process of ICM for an irregular geometric transparent plastic panel. This method can not only reconstruct 3D flow front, temperature and pressure field of ICM process in a much more realistic way, but also more fully demonstrate the length of 3D fiber flow line(FFL) and the variation of shrinkage rate and its homogenize process. Due to such improved algorithm, great improvement has been made to accurately calculate the shrinkage rate in depth of the panel and predict its warp data, in comparison to the traditional temperature-volume contraction index method, which has important practical value to guide and design the technological process of ICM.
Transfer Model of Transverse Asymmetry Characteristic in Standers during the Steady Hot Rolling Stage
Authors: Zhao Xian Qiong , Liu Yi Lun , Huang Sheng
Published: December 2010

During the hot rolling process, the perturbation of transverse asymmetry factor will generate strip steering, strip delivery wedge and other failure state. During the steady rolling stage, the constraint action of tension and so on can restrain strip steering. Transverse asymmetry characteristic mainly passes in the form of strip delivery wedge between the standers. Firstly this paper researches correlation of transverse asymmetry characteristic parameter toward single stander, establishes a function model to reflect transverse asymmetry result status, for instance strip delivery wedge, strip entry wedge, strip eccentric, gap wedge and other transverse asymmetry disturbance factor. Then the paper establishes transfer model of transverse asymmetry characteristic between standers, gets result status of strip delivery wedge between each ensuing standers under strip entry wedge, strip eccentric, gap wedge and other combination of disturbance. At last the paper takes working condition of actual aluminum hot rolling production line as an example, computes transfer coefficient of strip delivery wedge under several perturbation and discuss transfer discipline of transverse asymmetry characteristic between standers.
Hydraulic Model Experimental Study on Coherent Jet Flow Field
Authors: Liu Kun , Bao Li Ming , Han Ren Zhi , Qiu Sheng Tao
Published: December 2010

Based on Anshan Iron and Steel Company 180t top-bottom converter prototype, the operating parameters and the structural parameters for best stirring effect of bottom-blowing converter and top-bottom converter was given by the hydraulic model test in this article. Coherent jet oxygen lance converter smelting effect was simulated under the condition of keeping the best top blowing gas flow rate. The experiment result shows that coherent jet oxygen lance may achieve the result of top-bottom converter stirring effect. If coherent jet oxygen lance could be applied in the converter, bottom blowing system of converter could be canceled. In that case, not only the converter equipment can be simplified, but also the converter lining life can be improved, bring steel-making technology transformation.
Grating Nanomeasurement and Implementation Technology Based on TMS320F28335
Authors: Xu Cong Yu
Published: December 2010

A grating nanomeasurement device based on TMS320F28335 was presented, a novel subdivision algorithm for nanomeasurement was put forward and implemented in TMS320F28335. The analysis and test show that, through the pre-amplifying circuit well designed and through the data process algorithm optimized, the device applied with 20m pitch grating can realize 2nm resolution and greater than 200mm/s measurement speed. The experimental results of nanopositioning also demonstrate that the grating nanomeasurement device developed by the paper can be taken as nanomeasurement equipment used in nano-CMM and nanopositioning system.
Research on the Sensitivity Damage Identification Method Based on Closed-Loop Feedback Control
Authors: Wu Xiao Ming
Published: December 2010

The structural mode parameters are identified by dynamic test technology, the system mode sensitivity(the structure parameter changes with characteristic parameter) is defined. At the same time, the controlled target is constructed according to feekback way, then the damage identification sensitivity is improved by feekbace force and its place. Finally, a simulant example is given to show the effective aspects of the method.
Modeling and Performance Analysis of Combined-Cycle Based Ship Power Plant
Authors: Zeng Hong , Zhao Xiao Ling , Zhang Jun Dong
Published: December 2010

For combined-cycle power plant performance analysis, a ship power plant mathematical model is developed, including diesel engine, controllable pitch propeller, exhaust gas boiler, turbine generator and shaft generator models. The simulation performance characteristic curves of diesel engine under various loads are given. Comparison of simulation results and experimental data shows the model can well predict the performance of diesel engine in various operating conditions. The specific fuel oil consumption contours of combined-cycle power plant and the relations between engine operating conditions and steam cycle parameters are given. The influence of diesel engine operating conditions to the overall performance of combined-cycle power plant is discussed.
Design of Debris Shield of Powered Support with 6.2M Large Mining Height
Authors: Chen Jing , Hao Shao Xiang , Fan Xun
Published: December 2010

One of the difficulties of the world’s mining industry is how to ensure safe and reliable work of the powered support with large mining height more than 6m. The paper introduces the design and calculation of debris shield of the powered shield support with 6.2M large mining height. In this paper, first mechanical model of powered support with large mining height was established, the mechanical characteristics of powered support was analyzed, and overall design of powered support and general structure of debris shield could be done according to the force calculation.
Study on Green Innovative Design Based on Function Analysis
Authors: Zhang Fu Ying , Zhang Hong Chao , Zheng Hui , Zhang Qing Qing
Published: December 2010

The aim of green innovative design is to improve environment efficient by function innovation. In order to help designer to generate new product ideas giving attention to customer needs and environment demands, a green innovative design framework based on function analysis is proposed. This framework integrates green design rules and environment factors into the process of function innovation. By analyzing and resolving the functions that will bring environment loads, the new product ideas with low environment impact and energy consumption are obtained. A case study is also presented to illustrate the effectiveness of the proposed design framework.
Innovation Design of Hand Tools Based on User Experience
Authors: Huang Li Qing , Li Ming Zhu , He Can Qun
Published: December 2010

Product innovation design based on user experience is a new direction for the development of design theory. It’s also the expansion of user experience in the field of product design. By the theoretical analysis of user experience and product innovation design, the procedure of product innovation design is proposed considering the features of hand tools. It includes four stages: user research, task analysis, prototype design and testing & evaluation. In the innovation design procedure of hand tools, the core is product task analysis and user task modeling.
FEM Modeling and Mechanics Analysis of Flexible Roll Forming
Authors: Yan Yu , Li Qiang
Published: December 2010

Flexible roll forming is a new forming process that produces parts with variable cross sections. This forming process is proposed to meet the need in the weight reduction of automobiles. With deep understanding of this process and reasonable simplification, the FEM model of a nine-step flexible roll forming of an ultra-high-strength steel bumper is established. In order to analyze the mechanics and the deformation characteristics of the flexible roll forming, equivalent stress, equivalent strain, sheet thickness and springback amount are extracted from the simulation result and studied comparatively, which is of great importance to understand the appearance of the forming defects. In addition, the forming load and torque of the rollers can also be obtained which can guide the design of the flexible roll forming product line.
Develop a Vision Based Auto-Recharging System for Mobile Robots
Authors: Su Kuo Lan , Lin Yung Chin , Liao Yi Lin , Guo J. Hung
Published: December 2010

The article develops a vision based auto-recharging system for mobile robots, and programs a new docking processing to enhance successful rate. The system contains a docking station and a mobile robot. The docking station contains a docking structure, a control device, a charger and a detection device and a wireless RF interface. The mobile robot contains a power detection module (voltage and current), an auto-switch, a wireless RF interface, a control system and a camera. The docking structure is designed with one active degree of freedom and two passive degrees of freedom. The active degree of freedom can move forward to contact the recharging connect points that are arranged in the mobile robot. The two passive degrees of freedom can rotation in the Z-axis and use compression spring moving on various docking condition. In image processing, the mobile robot uses a webcam to capture the real-time image; and transmits the image signal to the computer via USB interface, and uses Otsu algorithm to recognize the position of the docking station. In the experiment results, the system had been successfully guided the mobile robot moving to the docking station using the proposed method.
Groundwater Level Forecasting Based on Support Vector Machine
Authors: Zhao Wei Guo , Wang Huan , Wang Zi Jun
Published: December 2010

In this paper, we apply support vector regression (SVR) for groundwater level forecasting and compare its results to other prediction methods using real groundwater level data. Since support vector machines have greater generalization ability and guarantee global minima for given training data, it is believed that support vector regression will perform well for time series analysis. Compared to other predictors, our results show that the SVR predictor can reduce significantly both relative mean errors and root mean squared errors of predicted groundwater level. We demonstrate the feasibility of applying SVR in groundwater level prediction and prove that SVR is applicable and performs well for groundwater data analysis.
Structure Analysis of UPC Type 3-DoF Rotational Spatial Compliant Parallel Manipulator
Authors: Zhu Da Chang , Chen Yu Hang , Meng Li
Published: December 2010

Nanomanipulation could be defined as the manipulation of nanometer size objects using a nanometer size end effector with ultra precision, which was enabled by the invention of Scanning Tunneling Microscopes (STM). However, most of the existing micromanipulators provide only planar 3-DoF or spatial 3-DoF translational motion characteristics. In this paper, a 3-DoF UPC type rotational spatial compliant parallel manipulator is presented. In order to develop the structure stiffness of this kind of spatial compliant parallel manipulator, structure analysis of this mechanism is proposed. A simple but useful method which based on screw theory and geometric constraint conditions is also proposed. The compliant parallel manipulator is driven by three piezoelectric actuators and the three actuators in this mechanism are arranged according to the Cartesian coordinate system. The results of experiments via ANSYS have shown the validation of the theoretical analysis.
Modeling and Simulation of the Dynamic Characteristics of a Hydraulic Power Limiting Valve with Two-Spring
Authors: Xia Bi Zhong , Feng Ping Fa , Yang Hua Yong
Published: December 2010

A hydraulic power limiting valve, HPLV, is a key hydraulic element to realize power limiting control for hydraulic drive system in engineering machinery. By tracing with the discharge pressure of hydraulic pump, HPLVs are used to real-time control the pilot pressure that corresponds to the displacement of hydraulic pump, and match the output power of hydraulic pump with the power of its prime mover within high efficiency scope. So good dynamics is important for HPLVs to reflect the frequently change of pump pressure. Based on the description of a typical HPLV with two-spring structure, its principle and the working process are discussed, then the mathematical model is established and the effects of several main structural parameters on its dynamic characteristics are carried out.
Research on the Parameters of Phononic Crystals Suitable for Automotive Noise Control
Authors: He Yu Yang , Zhuang Bie Lei , Jin Xiao Xiong
Published: December 2010

Phononic crystal is a novel type of periodic composites which is presented near years. When the elastic wave frequency falls within its band gap of the phononic crystal, the propagation of vibration and sound are forbidden. This property provides a new research method for the control of low-frequency interior noise. MSC. Nastran simulation method is applied to compare the propagation of two-dimensional Bragg phononic crystal and the locally resonant phononic crystal. The impact of the parameters on the propagation is analyzed by using MSC.Nastran simulation method in order to fabricate the photonic crystal structure suitable for the automotive interior noise control.
Identification-Free Adaptive Separate Layer Water Injection Control Based on Expert Amendment
Authors: Wang Feng Shan , Jia De Li , Zhang Shu Jin , Liu Chong Jiang , Xu De Kui
Published: December 2010

An identification-free adaptive control strategy based on expert amendment is proposed in this paper to solve the problem that it is difficult to establish mathematical model of water injection regulating process due to large time delay, strong nonlinearity and time variation in the flow control of separate layer water injection technology. In this control strategy, according to the past and current process information of water injection, the system output and trend can be estimated based on expert rules to amend the output of the identification-free adaptive control. The simulation result shows that this control strategy has perfect control performance and strong adaptability and it provides a feasible means for improving water injection effect.
Optimization of Fuzzy Logic Rules Based on Improved Genetic Algorithm
Authors: Gao Rui Zhen , Xu Zhi Qiang , Zhang Jing Jun
Published: December 2010

This paper completes a full car semi-active suspension system model, using improved genetic algorithm approach to optimize the fuzzy logic rules and the co-simulation were carried out in the environment of Matlab/Simulink. The results of being compared with the passive suspension demonstrate is that this developed fuzzy logic controller based on genetic algorithm enhances the performance of the full car suspension system significantly.
Dynamic Modeling and Numeration of Flexible Multi-Body System with Closed Loop
Authors: Liu Shu Qing , Wang Xing Song
Published: December 2010

The dynamic model of flexible multi-body system with closed loop is described with natural coordinates. The method is formulaic and especially appropriate to the modeling of system with repetitive substructures, but Lagrange multipliers as unknown variables are contained in the model. The dynamic model is reduced to a system with minimum dimensions by means of null-space orthogonal basis of constraint Jacobin. The result is correspondence with the dynamic model of rigid multi- body system while the rigid and flexible coupling is considered. The numerical method and the simulation steps are given in detail. Numerical example dealing with a flexible parallel four-bar linkage widely used in engineering illustrates the performance of the proposed method. The dynamic response of the angle between flexible linkage and horizontal axis are presented. The results indicate that there are clearly fluctuation in the angular velocity and acceleration of crank. The motion of connecting linkage contains not only translation but also narrow range rotation especially in the start instant.
A Distribution Model of Electric Vehicle Charging Station
Authors: Wang Zhen Po , Liu Peng , Han Hai Bin , Lu Chun , Xin Tao
Published: December 2010

The location and the overall arrangement of the charging stations is an important problem with the development of electric vehicles. It is related to the charging needs, city planning, service level of charging station, geographic location and competitive ability and so on. A distribution model of EV charging station is introduced in the paper. In order to describe the model preferably, this paper introduces the attractive factor of charging stations and the area-different factor. The model can give the charging station rational positions by analyzing the data of the traffic flow and the electric-consuming-rate of cars on the road. A case study is given to illustrate the applying the model.
Analysis of the Leakage for Hydraulic Slide Valve Spool
Authors: Fu Shu Guang , Chen Kui Sheng , Fu Lian Dong
Published: December 2010

The paper studies the impact of different amounts and shapes pressure equalizing grooves on hydraulic slide valve spool by simulation analysis. The simulation results show that, the leakage is greater when the spool and valve-sleeve are concentric than the spool is skew as there is no pressure equalizing groove on the spool while it is smaller as there are pressure equalizing grooves on the spool. It also knows whether the spool is skew or not, the leakage is greater when there are rectangular grooves than triangular grooves. This study has very important significance on the research of gap seal and valve design.
Temperature Variation of Concrete-Steel Deck Plate under Solar Radiation
Authors: Chen Bo , Zheng Jin , Wang Jian Ping
Published: December 2010

The analysis of time-varying temperature field of a composite concrete-steel deck plate under strong solar radiation is carried out in this study. By assuming the temperature distribution along the bridge longitudinal direction is basically constant, one typical segment of the deck plate is investigated. Two-dimensional heat transfer models are utilized to determine the time-dependent temperature distribution of deck plate, deck trough and deck pavement of the bridge. A modified solar radiation model is utilized to predict the variation of solar radiation in a whole day. A thermodynamic model is established and a transient heat transfer analysis is conducted to predict the time-varying temperature distribution of the deck plate at different time. The measured ambient temperature data are used as thermal boundary conditions during the numerical analysis. The made observations demonstrate that the simulated temperature variation of the deck plate based on the modified solar radiation model agrees well with measurement results, as compared with those obtained from the traditional solar radiation model..
Motion Modeling and Simulation of High-Speed Unmanned Surface Vehicle
Authors: Yue Jin , Ren Guang , Liang Xiao , Qi Xiao Wei , Li Geng Tian
Published: December 2010

According to the motion characteristic and the hydrodynamics of high-speed deep-V planings, forces and moments acted on a deep-V planing propelled by a contra-rotating propeller were analyzed, and on the basis of MMG modeling method, a real-time 6DOF mathematical motion model for the high-speed unmanned surface vehicle(USV) was built and the performance was simulated using the Matlab/Simulink software tool. Compared with the actual sea trial data, the results show that the proposed model can better reflect and simulate the maneuverability of the USV under ocean environment.