bluuebunny/crossref_metadata_2025 huggingface dataset:
The Effect of Vehicles Steering Tilt Angle Impact Human Thorax
Authors: Cai Zhi Hua , Lan Feng Chong , Chen Ji Qing
Published: September 2013

Thorax injuries are common in vehicular accidents, second only to head injuries. Unbelted drivers of vehicles are more likely to suffer thorax injuries from steering wheel contact in frontal impacts. The objective of this study is to investigate the effects the steering wheel tilt angle (0, 20, 40, and 60) impact to the thorax of human body model with respect to thorax deflection and steering wheel rim contact interaction. To understanding of the human thorax sensitivity to steering wheel tilt angle on the force and deflection response using finite element simulations. It was found that the thorax response is sensitive to changes in steering wheel tilt angle. The contact force, Sternal displacement were the key parameters to be observed and compared. The results show that the contact force increased when the steering wheel tilt angle was bigger, the response was quicker. Low steering wheel tilt resulted in greater deformation. The greater the contact force, the deformation of the sternum but reduced when thorax impact the steering wheel, According to ECE R12 steering wheel regulation ,use force regulations to assessment the injury of the thorax is not accurate enough when human thorax impact the steering wheel.
Finite Element Modeling and Analysis of Rolling Bearing Based on Explicit Dynamics
Authors: Cui Jing , Wang Hua Qing , Xiao Fei , Dong Zuo Yi
Published: September 2013

A finite element model of a rolling bearing with ANSYS/LS-DYNA is bulit , considering pressure, speed, multi-body contact effects and constraints under friction. The movement process of the rolling bearing based on explicit dynamics is simulated successfully. Several relevant parameters of 6205 deep groove ball bearing are calculated and determined. The results show that rotational speeds of cage and rolling elements which get from finite element analysis are consistent with the theoretical calculated values and stress situations are the same as Hertz analysis solutions. It proves that the proposed model is effective, which lays a foundation for subsequent analysis and diagnosis for defected bearings.
Research on the Simulation Method of the Belt Conveyor Correction Device
Authors: Zhang Xi , Wang Yong Li , Wang Jing Bin
Published: September 2013

The accident caused by the off-tracking of belt is one of the most common belt conveyor failures, and corrective device is very important for guarantying its safe operation. The method of establishing physical model and simulation of corrective device is described in this paper, and the problems that must be paid attention to by using software. The idea of dynamic analysis to test the effect of different corrective devices by using simulation software is proposed.
The Research on Vibration Analysis of Blow-Down Wind Tunnel Pressure Regulating Valves
Authors: Yu Cheng Guo , Yu Ze Bin , Liu Zong Zheng , Lai Huan
Published: September 2013

The pressure regulating valves are crucial segments to control the pressure of the stability chambers in the transonic and supersonic blow-down wind tunnels. To solve the valves vibration problem, the pistons and their supporting structures of three typical pressure regulating valves in China Aerodynamics Research and Development Center (CARDC) were analyzed based on the modal analysis theory. From the analysis, two conclusions were obtained that the supporting structures are more rigid than the pistons, and a rigid piston is of critical importance to the valves stiffness. The structural parameters comparing results of the pistons showed the same viewpoint. A new design pressure regulating valve demonstrating the successful application according to the conclusion above was presented.
The System Design and Parameterized Modeling of Juice Extractor Screw
Authors: Zhao Yu Qian , Tan Xiu Feng
Published: September 2013

The ordinary screw designed in traditional method will increase the power consumption and decrease the juice yield in the process of squeeze. Presented the system design of juice extractor firstly, then used the UG software and dimension driving technology to construct the 3d model entity of the screw with variable pitches and diameters, followed by systems three-dimensional model. Finished the static analysis of the screw blade by ANSYS, completing a follow-up study of parameterized modeling.
Study on the Three Degrees of Freedom Model of Leaf Spring
Authors: Duan Ben Ming , Zhang Hong Xin , Shi Jin Zhu , Wang Ming Yang
Published: September 2013

In the analysis of car frame that considers the leaf spring, the three degrees of freedom model of leaf spring was proposed. It would be compared with the commonly used equivalent model at present. There is a clear difference between the impacts of the two models on the structure analysis of the frame. The stress and deformation of the frame with the three degrees of freedom model is greater than the commonly used equivalent model, and there is only a smaller value range of lightweight optimization. Through the comparison between the two models, it can be seen that the three degrees of freedom model can transfer force and moment of force in all degrees of freedom, which illustrates the stronger reliability of the three degrees of freedom model of the leaf spring.
The Green Mining Construction and Management of Daanshan Coal Mine in Western Beijing
Authors: Shen Jie , Ren Zhi Cheng , Pan Wei Dong
Published: September 2013

In the coal mine of Daanshan Mining Area, based on the innate advantages of Daanshan mine in the standard management and good enterprise culture, and the efficient measures of comprehensive utilization, technology innovation, energy saving and emission reduction, environmental protection and land reclamation which Daanshan mine had taken are analyzed. The analysis shows that the objectives and priorities of the green mine construction. The result implies that the construction of green mine is a complicated and integral process, it can not be succeed without a long-term plan and careful layout. Technology innovation is the key factor, all other factors are closely linked to the increase of technology innovation. To fulfill the promise of green mine construction to improve the environment to the world, China should make policies based on the relationship between environmental protection and mining activities.
Selecting Key Village by Quantitative and Qualitative Methods
Authors: Hong Guang Rong , Wu You Fa
Published: September 2013

The scientific and rational choice of key village is key to the new rural construction, mutual promotion and co-ordination between the urban and the rural in the transition period. The artificial extent of existing qualitative methods is great. Based on the space interaction principle, by introduction of quantitative methods and combination of quantitative method and qualitative method, four types of key villages are selected: the developing type, the connecting type, the trending type and the new constructing type. From the editors′ practice of new rural planning and construction in Xiaogan, they are made four typical illustrations and statistical analyses for 98 administrative villages.
Construction Research on the Green Hydropower of Houziyan Hydropower Station
Authors: Wu Sheng Guang , Zhou Ming Tao , Chen Feng , Hu Huan
Published: September 2013

The idea of green environmental has become a guiding ideology of construction, but green hydropower is still lack of materials and the theoretical system is not yet complete. That is to say, green hydropower is still at the preliminary design stages in our country. In addition, with our country’s different regional conditions, we can’t completely copy the foreign experience of green hydropower construction. Houziyan Hydropower Station is located in Kangding, Sichuan province with fragile ecosystems, and most residents are ethnic minority. On the basis of the existing system of green hydropower at home and abroad, the article is combined with the Houziyan regional characteristic of humanity and the environment to construct the evaluation index and certificate authority of Houziyan Green Hydropower from the national conditions of our country, which will provide the reference for the related personnel and units.
The Quantitative Analysis about the Impact on Transport Demands by the Industrial Structure
Authors: Qin Huan Huan , Jiang Xiu Shan , Nie Zheng Ying
Published: September 2013

Different industrial structures of national economic have different demands of the transport in quantity and quality. Analysis of the impact about the industrial structure on transport demands growth has important theoretical and practical significance. This research established a complete decomposition model between transportation demands and industrial structure factors, to analysis the impact about the industrial structure on transport demands. Calculating and processing with the input-output table of China, we provide ponderable suggestions and measures to adjust industrial structure and transport demands structure in China.
Tail Dependence Structure between Carbon Emission Allowances Returns Based on Copulas
Authors: Zhuang De Dong
Published: September 2013

This paper has focus on analyzing tail dependence structure between EUA spots returns and futures returns based on copula approach, which EUA spots negotiated on BlueNext and futures negotiated on European Climate Exchange within the European Union Emission Trading Scheme (EU ETS) during the Phase II. According to the generalized Pareto distribution (GPD) and different Copula functions, the research shows that Gumbel Copula based on the GPD marginal distribution can indicate the tail dependence structure of EUA spots returns and futures returns accurately, i.e. the dependence between upper-tails of EUA spot and Dec10 is stronger than that of lower-tails of them. In other words, EUA spots and futures are more likely to soar together than slump together during the Phase II.
Feasibility Analysis of and Recommendations for Establishment of a Greenhouse Gas Emission Reporting System on China's Industrial Enterprises
Authors: Chen Jian Hua , Bao Wei , Chen Liang
Published: September 2013

This paper reports on a feasibility study on the establishment of a GHG emission reporting system on China’s industrial enterprises. Based on an analysis of possible influencing factors, the paper suggests that a GHG emission reporting system in China may be primarily designed by considering six aspects: scope, content, method, frequency, channel and assurance. Through the analytic hierarchy process (AHP), a priority setting for this system was further proposed , in which the reporting object is each individual industrial enterprise, the measuring method is an estimate-measure combined method, the absolute emission value is reported annually through an individual platform, and the self-declaration and the administrative verification are integrated. Besides, a computer-based reporting tool is also developed. Finally, this study recommends a procedure timeline and several supporting conditions that will facilitate the establishment of a GHG emission reporting system on China’s industrial enterprises.
Equivalence of Transducer
Authors: Gong Wei , Shi Jian
Published: September 2013

Today Finite Automata are used in several areas of economy and research, for example in language and text processing or E-Commerce. There are often automata with more than hundred thousand states. Minimization of such automata can only be done by classical minimization methods. But this doesnt produce Minimal Finite Automata with output. A Transducer is a special Finite Automata that produces an output. One of the challenges is to test the equivalence of Transducers, this will be shown in this paper.
Theoretical Analysis of a Acoupled Fiber Ring Resonator
Authors: Zhang Xiao Min , Ci Yan Ke , Yao Jin Li , Wang Jing Li
Published: September 2013

A fiber ring is very commonly used to generate stimulated Brillouin scatterings(SBS), especially by using fiber ring resonator. In this paper we theoretically analyzed some parameters of our interest in a coupled fiber ring resonator. We firstly analyzed a directional coupler, determined the optical power distribution among the four ports of the coupler. Then theoretically analyzed the transmission function of a coupled fiber ring resonator, followed by the simulation of the analysis. The simulation results show that the smaller the coupling coefficient is, the better the cavity finesse and extinction ration are, the lower the SBS threshold is, which is of great importance when it comes to the generation of SBS.
Bionics Design of Stubble Blade Based on the Digging Claw of Mole Cricket
Authors: Zhu Wei Guo , Chen Chao
Published: September 2013

Mole cricket is one of soil animals. By studying the toe body, toe angle and toe surface morphology of the mole cricket mining claw, taking example by the size of commonly used triangular sawtooth, five L-type stubble-cleaning blades with different tooth throat angle were bionic designed. The result is shown that the blade with –22.5° tooth throat angle is the optimal by simulating using solidworks software.
Research on Product Design Based on the Effect Factor of Product Whole Life Cycle
Authors: Xu Xiao Yun , Guan Pai , Guo Xiao Wen
Published: September 2013

In order to reduce the resource waste and environmental pollution，this article applied product whole life cycle theory to product design, analyzed the product design was affected by three factors from the point of view in whole life cycle theory ,and put forward five key design elements of whole life cycle design based on the three factors.In short, the paper has practical reference value for the development and perfection of the whole life cycle design.
The Design of Finite Element Application Framework Based Design Patterns
Authors: He Ming Wei
Published: September 2013

The article discussed the design of the application framework of the finite element based on design patterns. The design patterns had been used to design the hierarchical architecture of finite element method, the construction of objects, the management of arithmetic, and the facade of the framework in design stage. At last we can get an application framework of the finite element with the flexibility and reusability.
An Evaluation System of Maintainability of the Civil Aircraft Based on Virtual Reality
Authors: Wu Xu Dong , Liu Hu , Mo Song , Wu Zhe
Published: September 2013

Maintainability evaluation processes of the civil aircraft in the early design phase can be more visualized and efficient using the virtual reality technique. This paper presents an architecture based on virtual reality for the civil aircrafts maintainability evaluation. The research mainly focused on one of the important aspects of civil airplanes maintainability evaluation: accessibility involved in the maintenance activities. Firstly, architecture of the evaluation system was built. Then a prototype software system based on the architecture was developed. To demonstrate the usability and effectiveness of the system, a test case was presented.
New Methods of Reliability Engineering
Authors: Cui Yu Lian , He Cheng Ming , Wang Jun Wei
Published: September 2013

The rapid development of industrial technology puts forward higher and higher demands on the product reliability and the traditional reliability methods have been challenged. In this paper, two methods applied in reliability engineering in recent years are discussed. The methods include the axiomatic quality process and physics of failure method.
Innovative Design of Injection Mold Based on Design around Patent
Authors: Wang Hao Lun
Published: September 2013

In the era of knowledge-based economy, the patent barriers are getting more and more serious for enterprise when they enter the market; the space for the development of their technology is getting smaller and smaller. Therefore systematical innovative methods are badly needed to guide the enterprises to design around patents and achieve better technology market without infringement on the basis of existing patents technology advantages. The process for designing around patents and innovative design was presented according to rules of patent infringement judgment and TRIZ methods. The injection mold is analyzed as a case study by above integrated process.
Higher Dimension Modules Incurred Mechanism Structure Variation
Authors: Zhang Li Ping , Pang Gui Bing , Zhou Mao Jun , Bu Fan Ling
Published: September 2013

This paper investigates spatial reconfigurable module and its metamorphosis which occurs from the reconfiguration of displacement units. The inherent decomposition for displacement units reveals the inherent reconfiguration principles for spatial topology extension. The type and structure of reconfiguration units dominate the potential reconfiguration ability and the available reconfiguration patterns. The reconfigurability analysis can be supported by group theory. The group is a non-empty set invested with a closed product operation and satisfies defined conditions, which are the associativity and the existence of identity element and of an inverse for any element. The set of rigid body motions or displacements denoted by {D} is endowed with 6D Lie group transformations, which acts a fundamental tool in the analysis of general properties of mechanisms. Based on unit construction principle and algebraic structure of the Lie group, self-rearrangement characteristics of spatial reconfiguration structure can be accounted as displacement set self-adaptation.
Study on the Design of Outdoor Furniture Made of Recombinant Bamboo
Authors: Liu Xin , Zhang Zhong Feng
Published: September 2013

People are paying more attention to the design of outdoor furniture with the coming of outdoor leisure lifestyle. The using of bamboo material has become the inevitable trend in the background of pursuiting of ecological and environmental production. It indicated recombinant bamboo (RB) can be widely used in outdoor furniture through analyzing its performance such as physical and mechanical properties, processability, mildew proof and corrosion resistance. And then it summed up the guidelines of current outdoor furniture design by discussing the concept and types of outdoor furniture, which should integral with the environment, emphasize the embodiment of the artistry and the culture based on the function and technology. And it put forward the design of recombinant bamboo outdoor furniture should start from the material itself, show the bamboo culture, combine different color and texture of recombinant bamboo and chose other outdoor material to match, and guide people to further research of recombinant bamboo characteristics to improve the processing performance, durability, decoration, etc., and provide more choices for the future design.
Design of pH Meter Based on msp430
Authors: Ding Jian Jun , Wang Jun , Sun Chao , Liu Yan Qun , Shao Jia Yan , Xue Jing Li
Published: September 2013

The pH meter based on msp430 has designed in this paper, and which can accomplish all kinds of functions, for instance, data collection, data analysis, local control and telecommunication. In order to improve the accuracy of data collection we use dual high impedance differential input circuit. And choose temperature transducer DS18B20 which has a function of automatic temperature compensation to reduce the effects of temperature fluctuation on measurement. So it can achieve accurate determination of the pH value of the material.
A Novel RFID-Based Thermal Convection Type Inclinometer with Non-Floating Structure and Hemi-Cylindrical Chamber
Authors: Lin Jium Ming , Lin Cheng Hung
Published: September 2013

This research proposes a novel wireless RFID-based thermal convection inclinometer. Five new ideas are presented. The first one is to make it on a flexible substrate to save more energy than the traditional silicon. The second one is to integrate both an inclinometer and a wireless RFID antenna on the same substrate, such that it becomes a wireless sensor and very convenient for usage. The third idea is to apply the hemi-cylindrical chamber instead of the previous rectangular one, so the gas distribution is more streamlined to increase the sensitivity. The fourth idea is to use a non-floating structure instead of the floating one, thus it is more simple and low cost without making a cavity in the substrate. The fifth idea is to apply stacking material for the temperature sensors, so that the sensitivities are not only larger, but the curves are more linear. Three kinds of stacking height were studied, such as 1, 1.5 and 2mm. Moreover, three types of material with different thermal conductivity are also tested, such as alumina nitride (AlN), copper and silicon. If the chamber is filled with the traditional carbon dioxide, one can see the combination of AlN/2mm is better, and the maximal linear operating range and sensitivity are 75° and 0.107°C/Degree, respectively.
Transmission Ratio Optimization of Electric Vehicle Powertrain
Authors: Wang Yu Ming , Du Chang Qing , Li Xia Nan , Yan Fu Wu
Published: September 2013

Improving the driving range and driving performance are critical for pure electric vehicles (EV). Transmission ratios directly affects drivability and economy of EV. This paper analyzed the impact of various transmission ratios on the performance of EV, verified the vehicle performance with different transmission ratios by simulation with models built with GT-drive software, and based on EV performance requests, optimized the EV transmission ratios, presents single reduction gear and multi-speed transmission ratio scheme respectively, compared the EV performance with these two transmission schemes respectively, simulation results show that multi-speed transmission system can improve the performance of electric vehicle on dynamic and economy.
Coherence Analysis and Control of Multi-Exciter Vibration Test System
Authors: Yan Zheng Tao , Ding Shao Chun
Published: September 2013

Multi-exciter vibration test control system is the core of the multiple shaker vibration test, and multi-exciter vibration test control technology has become the hot point of vibration test field. Based on coherence principles, the coherence of two exciters control system was tested, the introduction of noise signal reduces the control coherence between the response spectrum and partial coherence between response and the corresponding drive signal. By means of increasing the coherence between drive signals, the control coherence between the response spectrum can be raised and control performance of system can be Improved. The above means could provide technical support for multi-exciter vibration test system development.
Design and Implementation of Remote Measurement and Control System Based on ARM with RL-RTX
Authors: Sun Jie , Zhao An Bing , Bai Ming , Zhang Jun
Published: September 2013

With the development of Internet technology and embedded technology, the network measurement system is becoming a new trend of measuring technology. This paper described a remote measurement system in Browser/Server (B/S) structure and the embedded design, hardware structure and software. The measurement experiment is already set up and some parameters tested is given. In this remote measurement and control system, LM3S8962, the microprocessor is used, and RL-ARM is used as the operating system, and CGI and AJAX technologies is also introduced to enhance performance.
Design and Research of a Distributed Network Spectrometer
Authors: Sun Jie , Zhang Jun , Zhao An Bing
Published: September 2013

With the development of network technology, distributed system has been widely used in the area of measurement and control. This paper introduces a kind of distributed network spectrometer. The proposed method based on embedded technology and GPRS network technology, which achieve the real-time detection of targets from multiple locations.
Design of Self-Propelled Mobile Stage Vehicle
Authors: Jin Hong Yan , Zhu Zhi Wei
Published: September 2013

In this paper, for the self-mobile stage vehicle design principles, designed a machine to automate the entire flow of the main stage, high-performance cars. Focus on the mobile stage vehicle "design professional, operational safety, performance adaptation, the use of durability, the conservation of economic and quality of services" and other challenges make it more safe and practical, to make up for the traditional mobile stage vehicle inadequate design. The self-propelled mobile stage vehicle with a compact, easy to operate, easy to open and close, easy to perform, etc., is a collection security, high-performance multi-purpose arena in one car.
Laser Shearing-Interferometry for Measurement of Rail Straightness Accuracy and Error Analysis
Authors: Li Sen
Published: September 2013

A long rail straightness measurement method is given for the portable laser alignment measurement system which is based on laser shearing interference fringes. Through theoretical derivation, mathematical model is set up between the laser phase differential linearity error and shearing interferometry. Large numbers of experiments have verified correctness of long rail straightness measurement method, analyzed the cause of error and provided ways for error reduction.
Measurement Error of Left-Turn Vehicle Trajectory by Video Detection
Authors: Liu Bo Hang , Liu Xiao Xia , Zhang Shi Jie
Published: September 2013

The video detection technology is a very active branch in the research field of machine vision, and the detection of vehicle trajectory by the stationary camera has become more and more important. However, there is little research on the measurement error of left-turn vehicles trajectory.This paper not only studies the relationship between the measurement error and longitudinal distance; but also relationship of measurement error and transverse distance. Their mathematical models are constructed and each of the variables in the models is analyzed. Then in the case analysis of certain intersection, the experimental results have shown that the proposed funtions can describe the relationship between measurement error and the parameters. It can provide the theoretical support for the measurement error problems of obtaining trajectory by video detection.
Measurement of the Derivatives of Surface Displacements by Using a DSSI Method
Authors: Zhang Hong , Li Huai Zhong , Yin Jun Feng
Published: September 2013

Shearography is a whole-field optical technique used to measure the surface displacement derivatives. The digital shearing speckle interferometer (DSSI) allows the acquisition and observation of fringes in real time without having to undergo the photographic wet-process and the filtering procedure. In this paper, the principles of DSSI are introduced. In this method, the undeformed speckle image is firstly digitized and stored into the computer through a CCD camera. The subsequent frames of the deformed object are then subtracted continuously from the stored reference frame, thus a fringe pattern is formed. By counting the fringe order, the displacement derivatives at any point on the surface of the object can be determined. A case study using DSSI method to measure the derivatives of surface displacements is presented.
Measurement of the Position and Shape Error for Macro-Axis Base on MCGS and MATLAB
Authors: Luo Xiao Yan , Fu Pei Huan , Yu Cou Ping , Zhu Xu
Published: September 2013

Aiming at the problems of measurement of the position and shape error for macro-axis, the idea of "software is the instrument was designed to assessment system based on the combination of MATLAB and MCGS . The system can complete the measurement data receiving, data processing, curve output, shape and position error calculation, alarm display, such as a series of functions.
Optimum Design of a Screw-In Venturi Flow Sensor
Authors: Xu Ying , Zhang Xiang Hong , Zhang Tao , Gao Lu
Published: September 2013

To study discharge coefficient linearity of screw-in venturi flow sensor, the effect of the screw-in blade attached to the sensor on discharge coefficient was analyzed, the structure of the screw-in blade was optimized by CFD software. Through the observation of velocity field, it was found that discharge coefficient will basically remain unchanged at low Reynolds number, while it declines greatly at high Reynolds number because of the guidance of the screw-in blade, as a result discharge coefficient linearity becomes better at the same measurement range. Orthogonal array of DN100 was designed for 10:1 measurement range to explore effect of geometric parameters of the screw-in blade on discharge coefficient linearity. Optimum structure for the screw-in blade is determined as follows: number of blade is 4, back slip angle of blade is 50°, front slip angle of blade is 5° and height of blade is 10.5mm. The numerical simulation indicates discharge coefficient linearity of the optimal screw-in venturi flow sensor is 0.601%,which is better than that of double-cone venturi flow sensor.
Polymer Diaphragm Based Fiber Optic Fabry-Perot Acoustic Sensor
Authors: Wang Qiao Yun , Ma Zhen He
Published: September 2013

This paper presents a polymer diaphragm based Fabry-Perot (F-P) sensor system for aeroacoustic measurement in air. The diaphragm of a novel polymer material poly phthalazinone ether sulfone ketone (PPESK) is used as the sensing element. The effective dimension of the diaphragm is 1.0mm in diameter and 6μm in thickness. Thanks to the good mechanical feature of the material and the interferometric-intensity demodulation mechanism, the sensor diaphragm shift sensitivity of 0.72 nm/Pa, correspond to an acoustic pressure to voltage sensitivity of 5.56mV/Pa has been achieved. Experimental results showed that the characteristics of the sensor system is comparable with traditional electrical microphone in frequency range 100Hz to 1kHz and the sensor has the potential to be used as an optical microphone.
Research on Detection Performance of a Composite Bistatic Radars System
Authors: Wang Fang , Wang Zhi Gang
Published: September 2013

A composite bistatic radars system is put forward to availably enhance the performance of anti-stealthy ,anti-reconnaissance, anti-jamming and anti-destruction for monostatic radar. The process modeling and technical project is introduced in this paper, and the detection area and measurement accuracy of the composite bistatic radars system is analyzed on the T/R-R process modeling. Lastly, a set of simulated experiments for the detection performance of composite bistatic radars system is carried out. The result of the simulation can provide the basis for structure multi-input and multi-output scouting early-warning detection system in the complex electromagnetic environment.
Research on Self-Sensing Signal Identification and Extraction Technology of Giant Magnetostrictive Actuator
Authors: Sun Shu Wen , Hu Tao Tao , Zheng Gang , Ma Chun Min
Published: September 2013

To realize the closed-cycle control of the giant magnetostricitive accurate driver sensorless, it must make the effective identification and precise extraction to the self-sensing signal of the driver. Based on the characteristic of self-permeability change of the magnetostricitive material under the effect of the external loading, establishing the electromagnetic model which can reflect the dynamic feature of the driver and the bridge circuit analysis model of GMM self-sensing driver. According to the established eletromagnetic and mechanical models, it proposes a kind of new self-sensing signal extraction technology, to make the driving function and self-sensing function to be realized by using a coil. Besides, it presents the schematic circuit diagram and analyzes the working principle of the circuit. The research of the experiment indicates that the circuit designed can successfully detect the variation of the displacement of the driver.
The Fault Diagnosis System of Measure and Control Radar Servo Motor Based on Ship in BP Neural Network
Authors: Jin Hua Song , Liu Jun , Sun Yong Jiang , Qiu Dong Dong
Published: September 2013

Servo motor plays an important role in the system of measure and control radar. But the motor is easily spoiled because of mechanical wear and vibrating under at high load over a long period of time. And the examination is inconvenient. In order to make the motor circulate dependablely, we need monitor the motor on line, and analyze the fault. In this article we propose a method to collect the motor oscillation, through Matlab neural network training, the diagnose fault is displayed in LabVIEW interface. The experiment indicates that result of the method is accuracy and very effective.
The Study of Thread Parameter Based on Machine Vision for Automatic Measurement
Authors: Chao Jing , Liu Zhan Feng , Liu Yan Shu
Published: September 2013

In order to improve the measurement accuracy of thread parameter and can realize the automatic measurement of parameter, this paper propose a non-contact measuring method which is based on machine vision, we use the industrial linear array CCD with high-precision scan the projection of the thread which in the field of parallel light, using the image recognition, image acquisition, image data processing technology enable your computer finish the pitch diameter, thread pitch, tooth type angle on a non-contact of real-time, on-line measurement. This article also provides detailed measuring method with the main parameters of thread.
Detect Phase Shifter Module of Array Antenna Using the Solar
Authors: Xu Peng , Quan Gang , Jiang Wen Zhi , Zhang Guan Hua , Su Li Ping
Published: September 2013

In order to detect the shifter module quickly and easily, a method is proposed that detect the shifter module using the solar. First, proposed two evaluation parameters; then the antenna receives signals from the solar radiation, compare the receiving power of each receive channel, that can get the two evaluation parameters, those two parameters shows the performance of each phase shifter module; Finally, verify the effectiveness of the method by a simulation experiment.
A Bi-Parametric Clutter-Map CFAR Detection Method in Non-Gaussian Environment for Foreign Objects Debris on Runways
Authors: Wu Jing , Wang Hong , Yu Xue Lian
Published: September 2013

Time-varying land clutter is primary interference for Foreign Objects Debris (FOD) detection on airport runways. Traditional clutter-map CFAR (CM-CFAR) algorithms were ineffect-ive to detect targets in non-Gaussian clutter. In this paper, a Bi-parametric CM-CFAR (Bi-CM-CFAR) algorithm based on bi-parameters estimation is proposed. Clutter-level estimation is obtained with video integrator, parameters estimator and recursive filter; and updated in each scanning period. Moreover, simulations verify effectiveness of this method for FOD detection.
A Development of Detection System on Acid Value of Lubricating Oil Based on Impedance Method
Authors: Liao Qiang , Xu Tao , Li Xiao Wei , Fan Wei Dong
Published: September 2013

Acid value is one of the most important indexes in the detection of lubricating oil, the testing of which has been widely used in the corrosive and quality characterization of petroleum products. So far there is no widely adaptive method and instrument faced with acid value. By the use of impedance method, this paper has used AD5933 to establish a detection system on acid value and achieve detection without chemical and judgment. Convenient setting of parameters and processing and storage of data are realized by the virtual instrument technology. Based on serial communication and virtual I2C communication, timely two-way traffic of statistics is achieved. The checkout of the system is accomplished by the known impedance. According to GB on the test of acid value, through the preparation of oil samples, the feasibility and operability of the system are justified and the best test conditions are determined.
A New Monitoring Technology on Arch Bridge
Authors: Tian Guo Zhi
Published: September 2013

In order to make the actual state of the bridge into the ideal state of maximum, we make real-time monitoring in the key parts of the bridge, and adjust to the design of the data to ensure the safety and reliability of arch bridge in the course of construction. Combined with the construction monitoring of the Sihe Bridge, this paper introduces the main bridge construction process on the large span tied arch bridge. Based on the construction monitoring of Sihe Bridge, this paper introduces the main contents and methods of monitoring point location, monitoring control of construction process, and discussed the construction monitoring technology of long-span X-style tied arch bridge.
Detection Probability of Airborne AIS
Authors: Ma She Xiang , Sun Jin , Guan Yong Qiang
Published: September 2013

Aiming at the small coverage of shore-based AIS and complicated structure of space-based AIS, airborne AIS is chosen to increase the coverage effectively. This paper gives the calculation method of the maximum transmission distance, and then establishes the detection probability model of the airborne AIS. The relationship between reporting interval, ship densities and detection probabilities is established. At the end of the paper, simulation results of the model are given.
Research on the Application of Wavelet Entropy Theory in Detecting Metal Magnetic Memory
Authors: Wang Ying Qiang , Xu Ji Ping , Shi Yan , Wang Xiao Yi , Yu Jia Bin , Liu Yang
Published: September 2013

A recognition method based on metal magnetic memory and wavelet entropy theory is proposed to detect cracks in metal workpiece. First, wavelet decomposition is performed to magnetic induction signal, and wavelet entropy is introduced based on soft threshold in wavelet transform to reflect the distribution feature of signal energy. Then the threshold of high-frequency component is determined self-adaptively due to different wavelet entropies of the signal at different decomposition scales, thus extracting useful information effectively and determining the position of the defect. Experiment result shows that the crack could be pinpointed based on characteristics from wavelet entropy theory, thus having an excellent application prospect in the life evaluation of metal defect.
Research on the Temperature Control Algorithm of VAV Air Conditioning System
Authors: Yan Jin Zhou , Jiang Nian Ping
Published: September 2013

This paper has proposed a new control algorithm based on wavelet neural network to control the Variable air volume Air Conditioning System with features of nonlinear and large lag. Using the wavelet neural network to predict the output variables online, and using the fuzzy RBF neural network as the controller to robust control the uncertainties of system parameters. Simulation results show that the algorithm proposed has good local predict ability for the nonlinear system, which is in full agreement with the mode. And it shows strong robustness and adaptability using the fuzzy RBF neural network to control the model gap in the running process of system.
Design of Crane Strain Acquisition System Based on ZigBee
Authors: Huang Xing , Xu Fei Yun
Published: September 2013

A crane strain acquisition system based on ZigBee wireless sensor network and WiFi is built to monitor the stress state of the cranes in real-time. The star topology is selected as the wireless communication architecture. The endpoint nodes are responsible for acquiring the strain data sampled by a time to digital converter PS021, and then sending the data to the gateway. The Gateway collects the data from the endpoint nodes and transfers the data to the host computer through WiFi network. Furthermore, the strain data are analyzed with the monitoring software. The static and dynamic strain data of a cantilever beam are obtained with the system, and the results show that the system works properly and is proved to be useful and feasible to monitor the crane stress state.
A Low-Complexity 3.6kbps Speech Coding Algorithm Based on Mixed Excitation
Authors: Li Qiang , Wang Li Zhen , Xia Xu Jiu
Published: September 2013

A low-complexity 3.6kb/s speech coding algorithm based on mixed excitation is presented in this paper. It uses the parameter encoding and mixed excitation technology to ensure the quality of speech. Through adopting the scalar quantization of Line Spectrum Frequency (LSF), the algorithm reduces the storage and computational complexity. Meanwhile, improved frame type with dynamic Unvoiced/Voiced (U/V) thresholds make a reduction of the traditional U/V decision error and the sudden transformation of U/V frame. A modified bit allocation table is introduced and the PESQ-MOS test shows that the synthetic speech quality has been improved and reached the quality of communication, especially for high frequency female speakers with new frame type.
A Thin Blade Error Analysis Strategy Based on Model Matching
Authors: Ren Jun Xue , Li Shan Shan , Zeng Jing Wen , Lin Qian
Published: September 2013

Aiming at error evaluation of aero-engine blade airfoil in blade inspection. A new inspection method based on modeling matching is proposed, through the introduction of location weighting factor the mathematical model is built to accomplish precise matching between the CAD design model and measurement model. Besides, gradient descent particle swarm optimization (PSO) method is used to optimize the calculating process. Besides, thin blade error evaluation system is developed based on UG/OPEN API technology. Practical example proved that the present method can improve the accuracy of the error evaluation, and reduce the misjudgment of the thin blade.
Aerial Transmission Lines Image Restoration Technology Research Based on the Improved Maximum Entropy
Authors: Li Bao Shu , Wei Wen Li , Cui Ke Bin , Xu Xue Tao
Published: September 2013

According to the limitations of the shooting environment, captured image exist the phenomenon of image blurring and noise. This paper proposes that the improved maximum entropy method recovery blurred image which acquire in aerial. Finally, according to the first order Markoff theory to evaluate the quality of the processed image, the results show that maximum entropy image restoration method compared to the conventional approach increase image clarity and details more better.
An Eye Localization Method Based on the Skin Color Feature and Otsu Algorithm
Authors: Yang Xiu Fang , Qi Yin Cheng , Yao Jie
Published: September 2013

In order to eliminate the influences of illumination and face-poses on eye localization, a feasible method is proposed based on the skin color feature and Otsu algorithm. Firstly, we detect the skin color in YCb'Cr' color space. Skin color segmentation principle is used to narrow the search region in human eye detection. Then we convert the segmented image to a binary image by Otsu algorithm and extract the eye region. Finally, the left and right eyes are positioned in the facial area with the binary integral projection. An analysis of the detections reveals that this algorithm has good robustness against changes of illumination and face-pose.
Application of Fault Diagnosis for Air Blower Based on Genetic Fuzzy Neural Network
Authors: Li Xiao Hui , Yang Hui Yu
Published: September 2013

The way of fault characteristic parameters fuzzy processing and optimizing the weights and thresholds of ANN by GA are studied. As a result, the convergent rate and convergent precision are greatly increased. Application to the fault diagnosis of a air blower system shows the new model overcomes the low learning rate and local optima of BP algorithm, and the fault diagnosis precision is effectively improved.
Auto-Identification of Symmetrical Contours on ICT Image in Reverse Engineering
Authors: Liu Guang Shuai , Li Bai Lin
Published: September 2013

Through considering the symmetry constraint characteristics in mechanical product contours, an auto-identification method of two-dimensional symmetrical contour based on feature matching is presented in this paper. Firstly, the feature points are extracted based on contour cloud point data partition and by using offset method, the different distribution rules of axis-symmetrical and rotation-symmetrical images for judging the type of symmetry was studied. The feature description parameters of symmetrical contour were calculated by adopting rotational inertia method and periodic method, which is regarded as the parameters for solving overall constraint optimization of the contour. Examples show that the proposed method can effectively identify the symmetrical contours and their types, and accurately extract the symmetrical constraint features.
Error Model of the Tangent Method CNC Aspheric Machine Tool Based on Multi-Body System Theory
Authors: Yu Zheng Lin , Yang Hao Tian , Yu Bo , Gu Li Dong
Published: September 2013

Based on the theory of multi-body system, for thetangent method CNC aspheric machine tool, the paper shows out the topologicalstructure and the array of low-order body of the system, the modeling processis stated, a specific mathematical expression for the comprehensive error modelis established, and it will be a steppingstone to the error compensation forthe machine tool.
Discrete Linear Canonical Feature Research of Chirp Signal
Authors: Xu Ji Jun , Liu Tao
Published: September 2013

The Chirp signal has many advantages that widely applied in communication, sonar, radar and other information processing fields as a common pulse compressional signal. The paper brought out an expression of the kernel of the Linear Canonical Transform (LCT) using its eigenfunctions. According to new expression, LCT can be expressed in terms of a new definition. Based on principle of sampling in time and LCT domains, a new definition of Discrete Linear Canonical Transform (DLCT) was put forward. The paper then proposed how to calculate DLCT of chirp signal in accordance with this new definition. Compared with other algorithms presented recently, it has more approximate results of continuous LCT.
Study on Signal De-Noising for Vehicle Active Anti-Collision Warning Radar
Authors: Wang Jian Hua , Wang Yun Cheng , Xie Fei , Ding Hai Feng
Published: September 2013

The Vehicle Active Anti-collision Warning system often adopts the millimeter-wave radar with linear frequency-modulated continuous (FMCW) system as its signal acquisition and processing device. Affected by the road environment and their own devices, intermediate frequency (IF) signal inevitably exist in a variety of interference and noise. This paper proposed an iterative Kalman filter algorithm to remove the noise from IF signal. And used of MATLAB to do the simulation analysis. The analysis results show that the improved algorithm enhances the precision of de-noising effectively and meet the requirements of real-time and accuracy.
FMECA Method of Health Management-Oriented
Authors: Du En Xiang , Wang Wei , Chang Lei , Ren Jing Jing
Published: September 2013

Traditional FMECA (Failure Mode Effect and Criticality Analysis) method is used to analyze the macro-failure mode effect and criticality. And the micro-failure mechanism and the rule of evolution of the weaponry conditions rarely involved. So it is difficult to adapt to the application demands of Health Management System for Weaponry. The deficiency of traditional and improved FMECA is analyzed and FMECA method of Health Management-Oriented is proposed in the text. By analyzing the launching and controlling system of vehicle antitank missile in the new FMECA method, showing that this method is applicable and reasonable.