bluuebunny/crossref_metadata_2025 huggingface dataset:
The Rigid-Flexible Coupled Modeling and Dynamic Simulation of HP-20 Robot
Authors: Zhang Gang , Huang Hai Bo , Zhang Ting
Published: September 2011

The rigid-flex coupled multi-body dynamic model of Motoman HP20 was built in this paper. The parts geometry shapes were modeled in 3D modeling software and imported into the multi-body platform. Then the joints were added to the parts. The arms were analyzed in FE software and modal neutral files were obtained. Then rigid parts were replaced by the modal neutral files. Driven curves of each arm joint were obtained by D-H method. The modal analysis of system was also made to analyze the robot dynamic characters. The results give some suggestions for robot motor selection and structural dynamic optimization.
A Three-Dimensional Finite Element Method for Nonsteady State Temperature Distribution in the Rolling Process
Authors: Song Shu Ni , Liu Jing Yi
Published: September 2011

The temperature is a key factor that affects the metal deformation and the material property in the rolling process. The metal deformation is often carried along with the variety of temperature. Moreover, the plastic work is converted into the thermal energy during the process of the metal deformation. Therefore, the numerical simulation of the rolling process should take the temperature factors into consideration to improve the prediction accuracy. In this paper, we use the full three-dimensional Rigid-plastic finite element method to predict the temperature distribution which relate to linear or non-linear boundary condition of the free surface. Based on the simulation, the impact of radiant heat-transfer coefficient on the temperature prediction can be obtained. The comparison of the calculated results between the linear and non-linear boundary conditions demonstrates that the temperature obtained on the linear boundary condition has higher accurateness than that obtained on the non-linear boundary condition.
Application Research of Pharmaceutical Industry Management System Based on ERP and CRM Integration
Authors: Wan Xiao Yan , Xu Guo Qing
Published: September 2011

Design of a pharmaceutical industry management system based on ERP and CRM integration, including design background, function and implement, are presented in this paper. The designed system applies middleware technology in data exchange between ERP and CRM, and all the data is transferred in XML format. The mainly integrated function modules are customer management module, product information module and sales module. Snowflake mode is used in data warehouse to eliminate data redundancy and to save storage space. The system can improve management ability and competition superiority of the pharmaceutical industry through ERP and CRM integration.
Improved Hysteresis Model of Micro-Positional Stage Based on PI Model
Authors: Li Yong , Cui Yu Guo , Zheng Shao Yong
Published: September 2011

In order to obtain higher accuracy and faster calculation speed of hysteresis model of the piezoelectric micro-positional stage, the traditional PI hysteresis model is improved in this paper. First, based on the fact of that the slopes of the first half of the initial loading curve for the piezoelectric micro-positional stage change much while the slopes of the second half change little, the PI hysteresis model of the stage is established by the non-equiinterval threshold value. Then, the established model is identified by optimizing the minimum L22-norm of the model errors. The results show that the maximum error and average error of the model are 0.71 μm and 0.23 μm in the displacement range of 22.75 μm, respectively.
The Study on the Torque Carrying Capacity of the Joint Bearing Six-Hole Style Laminated Membrane Coupling
Authors: Shentu Liu Fang , Yang Ping
Published: September 2011

Flexible laminated membrane coupling is a device which transmits torque by a group or groups of stainless steel sheet. The Relative displacements between the input shaft and the output shaft are absorbed by the flexibility of laminated material. The paper establishes a size transmitting torque mechanical model by analyzing the six-hole laminated membrane in new coupling with joint bearing, and obtains the analytical solution. At the same time, the paper compares the solution with the computed result from the ANSYS finite element method, and finds that the results are coincident in the load carrying capacity of lamination. The paper proves the accuracy of mechanical model and provides a theoretical basis for the design of the new six-hole joint bearing style laminated membrane coupling.
Modeling and Simulation of the Humanoid Massage Robot Arm Based on SolidWorks and ADMAS
Authors: Wang Zhan Li , Pang Zai Xiang , Zhang Bang Cheng , Chen Zheng Tang , Jiang Yan Qing
Published: September 2011

The arm is a key component of the humanoid massage robot system. On the basis of in-depth study on massage working mechanism of robot arm, a three dimensional parametric model is structured using SolidWorks. Through data conversion technology, the model is imported into ADAMS, and follow-up constraints and loads are added, with which the kinematics analysis on shoulder, upper arm and wrist joint are completed. It lays a solid foundation for the in-depth study on robot arm of massage working mechanism and the practical application. It can realize the prediction of the massage arm performance on the design phase, simplify the design process and shorten the cycle of the design as well as improve the design quality.
Laser Trigonometry Measurement System of Micro Cantilever Vibration
Authors: Zhang Wei , Gao De , Meng Yong Gang
Published: September 2011

This paper presents a laser trigonometry system measuring a micro cantilever’s vibration. The system includes a semiconductor diode laser, a short-focus optical system, PSD (Position Sensitive Detectors) and its signal enlarging system, and data collection system. The system can be used to measure the vibration data of micro frictional pairs. Compared with image method, the measuring frequency is higher and more accurate.
Parametric Modeling and Simulation for Aerodynamic Design of Launch Vehicle
Authors: Guo Zhong Quan , Liu Jian Xia , Luo Wen Cai
Published: September 2011

Aerodynamic design of launch vehicle is facing combinatorial explosion problem caused by modular design. In order to get basic feasible solution from huge design space, the efficiency of design and simulation must be improved. In this paper, a parametric modeling and simulation method is proposed, which is based on CAD/CFD tools. Firstly, the design Variables of the launch vehicle are divided into three categories: size parameters, configuration parameters and mesh parameters. Secondly, parametric geometry model, including size and configuration parameters, is obtained by secondary development of Pro/ENGINEER. Thirdly, parametric mesh files for CFD are generated by implementing CFD-GEOM with scripts written in Python. By specifying boundary conditions through command stream of GAMBIT, FLUENT software will run automatically to calculate the aerodynamic performance of the launch vehicle. Finally, a graphical user interface (GUI) is developed using VC++6.0. With this system, the integration of CAD/CFD application is achieved. As long as designers enter certain design parameters in the GUI, they will quickly achieve 3D geometry model and aerodynamic performance of the launch vehicle. Application examples show that, this system can significantly improve the efficiency of aerodynamic design of the launch vehicle, and the data error between simulation and experiment is less than 10%, which is acceptable.
Development of CNC Machine Running-In Instrument
Authors: Ke Liang
Published: September 2011

With high demand of CNC machine tools accuracy, machines are needed to run-in more than 48 hours before selling. As a key link of last process in mechanical assembly of CNC machine, the importance of CNC machine running-in has been approved to have vital effect on the safety, reliability and lifetime. CNC machine running-in instrument is used for test and run in mechanical parts of CNC machines including screw, guide rail and bearings. The paper presents the function of the CNC machine running-in instrument, principle, hardware circuits, the software flowchart of running-in instrument and part of the servo control program.
Coordination Control Model of Manufacturing System
Authors: Wang Lei , Ling Xue
Published: September 2011

This paper established a coordination control model for manufacturing system with three manufacturing cells. The step responses of the system under randomly selected control parameters and under empirically optimized control parameters were studied via simulations. Simulation results show that the proposed model coincides with the real-world system.
Study on the Drilling Process of the Carbon Fiber Composite Material
Authors: Wu Hong Bing , Li Ji Guang , Zhang Xue Chang
Published: September 2011

The quality of hole is difficult to be guaranteed and tool wears severely in drilling process of the carbon fiber composite material. To investigate the drilling process, a series of drilling experiment has been carried out .The influence law of drilling parameters, including the spindle speed, the feeding speed and the diameter of drill, on the drilling force and drilling quality for the carbon fiber composite material has been investigated.
On the Product Design and Development of Future Trend
Authors: Liu Yuan
Published: September 2011

With the rapid development of science and technology and the increasingly fierce market competition, product design and development has been paid much attention. At the same time, because of people's aesthetic awareness and the continuous improvement of quality life, people show too much favor in technique, human oriented design and artistry, which can also become the essential means for companies to compete in the market. Starting from the market demand perspective, taking the human oriented design and interesting design into consideration, and combining native culture and new material, this article provides a new idea of future product design and development.
Multi-Carrier Oriented Knowledge Allocation System Based on Business Process Modeling
Authors: Jiang Zhong Ren , Zhan Hong Fei , Yu Jun He , Chen Lei , Lei Chen Jian
Published: September 2011

With the development of economic globalization, knowledge management system plays more and more important role in modern enterprises. Knowledge management includes many aspects such as knowledge modeling, knowledge acquisition, knowledge allocation, knowledge sharing and etc. However, currently existing researches mainly focused on the personal knowledge modeling (i.e., carrier modeling) and business process modeling, but rarely provided the integrated tools to solve the problem of knowledge allocation. This paper proposes a multi-carrier oriented knowledge allocation scheme, which is based on business process modeling. The details of the proposed system have been discussed.
Contact between Prefabricated Pile and Pile Clamping Jaws under Pile Driving
Authors: Zhou Xu , Chen Yu Rong , Wang Zhen
Published: September 2011

Pile clamping mechanism with hydraulic static pile driver has advantages of convenient for the design, improvement and use. The maximum transmission pile driving force of pile clamping mechanism of hydraulic static pile driver was analyzed. The static forces of pile clamping mechanism and prefabricated pile were researched and analyzed. The contact between prefabricated pile and pile clamping jaws under pile driving was investigated. It was revealed that when the force of pile clamping cylinder is small, the contact between prefabricated pile and pile clamping jaws under pile driving can be considered that between the elastic inner cylindrical surface and the axis parallel elastic outer cylindrical surface. When the force of pile clamping cylinder is large, the prefabricated pile contacted with pile clamping jaws under pile driving can be considered the hollow thick-wall cylinder subjected to uniformly distributed external pressure.
Research on Real-Time NURBS Interpolator with Quintic Curve Acceleration/Deceleration Algorithm
Authors: Liu Xian Kui , Yang Yu Mei , Han Zu Xing
Published: September 2011

We put up a new fast and steady parameter interpolator on the basis of the present various interpolation algorithms. This proposed algorithm has little rate of speed errors than other algorithms and can save much computing time because of its avoiding derivation operations. Quintic curve acceleration/deceleration algorithm (QCAD) is deduced which can improve the flexibility of the CNC machine. By means of the QCAD planning, the demand velocity is maintained high at large of the time and can be smoothly accelerated/decelerated when needed. Therefore, the parameter interpolator with QCAD can meet the CNC dynamic properties to improve the machine quality. In the end, this NURBS interpolator is validated by matlab, which proves this proposed algorithm not only has the advantages of good flexibility and simple implementation procedure, but also has lower time complexity.
Experimental Study on the Technology of Cutting Titanium Alloy TC11 with Static Cooling
Authors: Gao Ji , Zhao Qiang , Xia Tian
Published: September 2011

In the traditional titanium alloy processing, Titanium alloys, however, are generally machined at lower cutting efficiency due to their low cutting speed and low cutting tool durability. This paper introduces a static cooling auxiliary method of titanium alloy TC11 cutting to solve the above-mentioned problems. The static cooling cutting can solve pollution by using coolant and decrease the consumption of resources and solve disadvantages in traditional titanium alloy processing problems.
Study on Cutting Hard Thermal Spray Coating
Authors: Wu Zhi Yuan , Shi Xiao Jun , Tian Xin Li , Tang Xiu Jian , Zhang Shu
Published: September 2011

The CBN and YG610 were used for remanufacture thermal spray coating cutting. The feed rates, in the experiment, adopt mode of creep feed. The experiment results showed that the YG610 can cut the thermal spray coating efficiently. And the surface finish qualities are all under Ra1, which can come up to the standard of common grinding. But the CBN tools will be broken in the cutting process, though it can perform well in the evenly qualitative material. By experimental investigation and analyses, it can be conclude that both the high hardness and huge impact exist in cutting process, which are main reasons which induce tools broken. So the materials of tools for cutting thermal spray coating need possess both sufficient hardness and toughness.
Study and Application of CAE Simulation in Die-Casting Die Design
Authors: Jia Zhi Xin , Li Ji Qiang , Liu Li Jun
Published: September 2011

The CAE simulations of filling and solidification processes for die-casting are studied. Numerical analysis is presented for a practical die-casting part using HZ CAE software. The temperature distributions and filling states in solidification and filling process are presented. Then the deficiencies of the part are predicted. Based on the analyzing results, the two die halves are modified and the die-casting parameters are adjusted. The service life of the revised die is increased from 12,000 shots to 20,000shots. It is proved that CAE simulation results can offer a helpful reference for die-casting die design.
Design and Application of Natural Audio Electric Field Frequency Selecting Instrument
Authors: Liao Xiu Ying , Cheng Hui , Bai Yi Cheng
Published: September 2011

An observation scheme, which is designed several frequencies suited over the natural audio electric field frequency range, is used to qualitatively understand the electrical structure of underground geological body. Weak signal detection technology has been used to amplify and filter the weak natural electric field signal, and read out them after selecting corresponding frequencies and integrating. This instrument can observe eight natural electric field signal at frequency of 8Hz, 16Hz, 32Hz, 64Hz, 128Hz, 256Hz, 512Hz, 1024Hz. Several reliable technologies have been used in the hardware design and software development to improve both the anti-interferences capability and system stability. Compared with field work instance, we conclude that natural audio electric field frequency selecting instrument can get the underground geological information within a certain depth, and therefore it can be used for fast survey in geology and mineral resources, and in engineering geophysical and water resources.
Analyzing the Two-Dimensional (2+1) REMPI Spectra of Bromine and Carbon
Authors: Zhang Jin , Ma Jian Guo
Published: September 2011

Experimental investigation have been carried out for dissociation/ionisation of methyl bromide using time of flight mass spectrometer, and the mass signals m/e = 12, 13, 14, 15, 79、81、129 and 131 were assigned to H+、C+ 、CH+ 、CH2+ 、CH3+、 iBr+ (i = 79, 81)、（CH)2iBr+ (i=79, 81). Next, two resonant peaks of 79Br+*/ 81Br+* were observed at 280.41nm and 281.74nm due to spin-forbidden 5p and 5p which have not been reported before. At last, the C REMPI spectra found near 280.34nm、286.94nm and 284.21nm were assigned, too, which compared with the predicted wavelength values.
Research on Multi-Link Dynamic Aggregation Model of Cloud Computing Network
Authors: Ju Hong Yao
Published: September 2011

The shortage of transmission link bandwidth limits the application of cloud computing. In this contribution a multilink dynamic aggregation model is suggested. Through effective integration of link flow monitoring units, link aggregation control unit and the gateway, more effective aggregation of transmission multilink and rational utilization of network bandwidth in cloud computing network were realized. In addition, dynamically access load flow problems were solved based on the actual load of different transmission link. The model is costly, stable and highly efficient.
The Design Research of Single-Chip High Power LED Radiator
Authors: Luo Yuan , Wei Ti Wei , Tang Zheng Wei , Kong Wei Xi
Published: September 2011

As new generation of solid-state lighting source with green environmental protection, White LED has become the focus of attentions. Along with the development of high power LED, heat dissipation problems of LED become more and more important. This paper makes research on single-chip high power LED by ANSYS finite element software, and analyzes the thermal effects of parameters on the radiator. This paper believes that the influence of radiator materials’ thermal conductivity is not obvious, and the finned height and cooling area of radiator play an very important role in reducing chip junction temperature.
Designing Multisine Excitations for Measurement of Modern Wireless Communication System
Authors: Yuan Xiao Yan , Fang Hong , Zhou Xin , Shou Guo Chu
Published: September 2011

Multisine signal is often employed as an appropriate excitation to represent the complex modulated RF signals for accurate measurement of modern wireless communication system. This paper presents a novel way of designing a multisine signal by using Discrete Fourier Transformation coefficients to represent the digital modulation signals. Investigations of the approach on the IS-95 reverse-link signal as original signal is demonstrated the designed multisine signal can approximate represent original signal.
KPCA Denoising and its Application in Machinery Fault Diagnosis
Authors: Jiang Ling Li , Deng Zong Qun , Tang Si Wen
Published: September 2011

This paper proposes a kernel principal component analysis (KPCA)-based denoising method for removing the noise from vibration signal. Firstly, one-dimensional time series is expanded to multidimensional time series by the phase space reconstruction method. Then, KPCA is performed on the multidimensional time series. The first kernel principal component is the denoised signal. A rolling bearing denoising example verify the effectiveness of the proposed method
Research of Direct Sequence Spread Spectrum Communication System Based on MATLAB
Authors: Li Xue Jun , He Zhi Cheng , Li Qi
Published: September 2011

This paper described the theory which based on the spread spectrum communication system, a simulation model was designed based on MATLAB, and each module of the model was briefly introduced. In a particular simulation condition, ran the simulation program, and an expected result was obtained. Meanwhile, by design a spread spectrum communication system of two users, detect the bit error rate corresponding with the two users in different bit error rate (SNR), directly verified the validity of the model system.
Development of a Novel Two-Axis Force Sensor for Chinese Massage Robot
Authors: Ma Jun Qing , Song Ai Guo
Published: September 2011

In order to judge and control applied force of Chinese massage robot’s end-effector on human body accurately, multi-dimensional interactive forces between massage robot’s end-effector and human should be measured. In this paper, a novel two-axis force sensor suitable for massage robot’s end-effector is presented, which is much smaller than existing sensors but in the same range measurement. Mechanical structure is introduced, theoretical analysis of elastic body is made, and finite element analysis is used to analyze its static characteristic. Then, the distribution of strain gauges and design of Hilton Bridge Circuit are described in detail. Finally, a prototype is fabricated. Decoupling algorithm is designed to reduce the interference error. The result of static calibration experimental data shows that the sensor has features of high precision and sensitivity.
The Design of Test System for Comprehensive Performance of Clutch Booster
Authors: Luo Zai , Luo Quan , Fan Wei Jun , Lu Yi , Guo Bin
Published: September 2011

According to the enterprise standards of "assembly and test norms for ZQ2005 clutch booster", the test projects for comprehensive performance, including pressure seal, hydraulic seal and input -output performance were researched [1]. An integrated test system based on electrical components, such as the data acquisition card, motion control card, supercharger, proportioning valve, solenoid valve was designed. And the data acquisition and data processing modules of detection system based on MFC were developed. Finally, the test procedure and the experimental program were designed. And the TianLong clutch booster 1608ZB7C-010 was tested synthetically efficiency. The results show that the detection system meets the test requirements in contrast to the test data and curves measured by the foreign instrument.
Uncertainty Evaluation Study of CMM Dynamic Measurement Based on Quasi Monte Carlo Method
Authors: Zhong Wei Hong , Ma Xiu Shui , Li Ying Dao , Li Yuan
Published: September 2011

In a contact measurement process, the coordinate measuring machine（CMM）probe will bring dynamic measurement error, therefore, dynamic calibration of the probe tip effective diameter should to be done at different probing speeds, and calibration uncertainty should to be given. There are some problems, slow convergence and unstable, using Monte Carlo (MC) method in uncertainty. In this paper, Quasi Monte Carlo (QMC) method is presented in the probe tip effective diameter uncertainty evaluation. At a certain positioning speed and distance approximation, probe tip effective diameter experimental tests are done with changing probing speeds. MC and QMC methods are used on uncertainty evaluation respectively, and the results are compared and analyzed. The simulation shows that QMC can be used on dynamic uncertainty evaluation of CMM probe tip. Compared with MC, QMC obtains a better stability and precision in small sample size and gains higher computing speed in large sample size.显示对应的拉丁字符的拼音 字典名词 assessment动词 assessevaluatepass judgment
The Function Realization of Vehicle Computer
Authors: Xing Qian , Li Liao Liao , Fang Jie
Published: September 2011

As the development of electronic technology and automotive industry, vehicle onboard computers are playing very important roles. Vehicle computer receive information from sensors and other devices. Base on the information, computer makes decision. When computer is running and making decision, other parts back up computer. Vehicle computer can turn on and off actuators rapidly.
Measurement and Analysis on Dynamics Cold Crystallization Parameter of High-Density Polyethylene (HDPE) Sheet by Vibration Force Field
Authors: Li Bing , Qin Xue Mei , Shi Bao Shan
Published: September 2011

Physics mechanics properties of polymer materials don’t only depend on their chemical constitution, molecular weight and distribution of molecular weight, but also depend on their agglomerate configuration. The effect of vibration on the microstructure and mechanical properties of high-density polyethylene (HDPE) sheets, obtained through vibration plasticating extruder in low temperature, were studied systematically. Crystalline polymer is analyzed by differential scanning calorimetry(DSC), wide angle X ray diffraction(WAXD). The test result which represents parameters of crystalline structure is helped to judge the outside factors for crystalline structure, such as melting point, crystallinity and heat of fusion by DSC and crystallinity, crystal plane distance and grain size by WAXD, and canning electron microcopy (SEM). The results indicate that the vibration extrudate in low temperature has higher crystallinity, perfect crystallite, and strong inter-spherulite ties.
The Graphical Solution of Transverse Asymmetry Parameter Relationship in the Rolling Stage
Authors: Zhao Xian Qiong , Liu Yi Lun , Huang Sheng
Published: September 2011

Ideally rolling parameter is symmetrical relative to rolling Hcenter lineH in the rolling process. When there is transverse asymmetry incentives disturbance, Hsymmetrical stateH will be destroyed. Some Hquality problemsH will happen. The paper study transverse asymmetry characteristic of force and deformation of rolling mill and mill bar, establish parameter relationship equation of transverse asymmetry characteristic of force and deformation, establish parameter relationship figure of transverse asymmetry characteristic of force and deformation. Using this figure, we get balance control model with a view to removing strip delivery wedge.
Experimental Modal Analysis of Motorized Spindle Based on Stochastic Subspace Identification
Authors: Meng Jie , Chen Xiao An
Published: September 2011

Experimental modal analysis is done to the grinding motorized spindle under 36000r/min. The corresponding theory and experimental plan are introduced. The time domain waveform is gained and the maximum vibration velocity is worked out. Stochastic Subspace Identification (SSI) is applied to study dynamic characteristics of motorized spindle which is running idle, then modal parameters are extracted. The correctness of the experimental method is validated, which has certain referential importance.
Coordinate Transformation of Laser Tracking in-Site Measurement System for Big Gears
Authors: Guan Ming Yang , Dong Ming Li , Zhu Lian Qing , Guo Yang Kuan , Chen Qing Shan
Published: September 2011

An in-site measurement method for big gears based on laser tracking and coordinate measurement technology is proposed in this paper. The coordinate transformation method, in which direction cosine are used as parameters, is suitable for large rotation angle transformation. The coordinate transformation with large rotation angle in the in-site measurement, hence, can be realized. The experimental results show that the proposed coordinate transformation method has the advantages of high accuracy and stability, and can meet the requirements of the laser tracking in-site measurement system for big gears.
An Improved Maklakoff’s Method for Measuring the Intraocular Pressure-Volume Relationship
Authors: Ma Jian Guo , Zhang Jin
Published: September 2011

The fundamental idea for measuring the intraocular pressure was proposed by the Russian physician A.N. Maklakoff as early as the end of 19th century and is still the basis for almost all the methods used in clinical practice. An improved Maklakoff’s tonometer is introduced in this paper. On the basis of this applanation tonometer, the experimental study on intraocular pressure-volume relation for the simulated eye is performed. Quantitative results and Qualitative conclusions that follow our study and may be of practical interest in finding the intraocular pressure and estimating the rigidity (stiffness) of the eyeball from the pressure–volume relationship are discussed.
Chemiluminescence Immunoassay Analyzer Control System Based on S3C2410A
Authors: Yue Xin Zhen , Zhu Lian Qing , Meng Hao , Chen Qing Shan , Na Yun Xiao
Published: September 2011

Chemiluminescence immunoassay (CLIA) is the combination of chemiluminescence system and immunoassay. CLIA is established as one of the best alternatives to conventional radioimmunoassay for the quantitation of low concentrations of analytes in complex samples. A high-performance CLIA control system based on the embedded microprocessor S3C2410A is presented in this paper. The system principle, the overall structure of the system, the control structure of the key functional blocks and the flow chart of the software are given. The hardware drivers and the application software are developed on the basis of S3C2410A. The experimental results show that the presented system is feasible in the clinical diagnosis and can be used in the automatic chemiluminescence immunoassay analyzer.
Ethernet Private Line Access Design Scheme
Authors: Tian Hong Fang , Liu Yan Hua , Li Ying Hong
Published: September 2011

With the development of Internet, IP has already taken the leading position of any kind of terminal utilization. In order to satisfy consumers’ growing requirements of broadband services,and make up for insufficiency of IP MAN in business management efficiency, data throughput, stability, maintenance difficulty and so on, improve information security of banks and governments, the article introduces a method of achieving Ethernet private line access to improve the information security and the quality of service of big consumer.
A Monitoring System to Prevent Forgetting to Take Medicines on Time Using Funnel-Shaped Sensors
Authors: Kitazono Yuhki , Matsumoto Takuya , Nakashima Shota , Yang Shi Yuan , Seiichi Serikawa
Published: September 2011

To prevent people to forget to take medicines, we propose a new monitoring system to prevent forgetting to take medicines on time. In this system, we develop a funnel-shaped sensor consisting of a holder with an LED below the lid of the holder and a photo detector at the bottom to detect medicines. When medicines are dropped into the sensor, they fall down to the bottom of the sensor and the photo detector receives only part light of the LED. According to the value of the output of the photo detector, it can be easily to judge medicines with a proper threshold value. Highly accurate monitoring system to prevent forgetting to take medicines can be produced by using this sensor. If medicines are not taken at time to take medicines, the system announces to the user.
Time-Divided Computer-Generated Holograms for the Construction of Spatial Continuous Laser Light Distribution
Authors: Yang Shi Yuan , Hora Toshinori , Seiichi Serikawa
Published: September 2011

Science of dealing with the prevention and treatment of disease is important for the maintenance of health in human social life. Laser technology plays an important part in various fields of medical science. In general, a spot laser light is used in laser therapy because of the limitation of laser output. Therefore, the operator has to move the spot position by hand when the treatment area is larger then the laser light spot. We propose a method to convert a laser light to match the target treatment surface using time-divided computer-generated hologram (CGH). In order to get a high laser light efficiency, we consider the phase-only type CGH. We use discrete reconstruction CGH to overcome the speckle problem in the generation CGH. A spatial continuous laser light distribution can be obtained by superimposing the discrete reconstruction from several time-divided CGHs.
Proposal of Intelligent Inventory System for Space Station with IC Tag - Near Real-Time Onboard Inventory Management
Authors: Shimada Kazuhito , Fujii Yusaku
Published: September 2011

Difficulty in inventory management on space station has been known since 1980’s but still is a new problem. We propose the expanded application of IC tags for the International Space Station inventory management. Use of multiple RFID tags can monitor package use status. Where electromagnetic interference or poor radio propagation is a problem, we may apply ultrasound tags.
A Wearable Supporting System for Visually Impaired People in Operating Capacitive Touchscreen
Authors: Yamawaki Akira , Seiichi Serikawa
Published: September 2011

We propose a wearable supporting system with a CMOS image sensor for the visually impaired people in operating capacitive touchscreen. This system attaches the CMOS image sensor without a lens to the tip of the middle finger. The icons and buttons displayed on the touchscreen are replaced to the color barcodes. Touching the surface of the touchscreen with the CMOS image sensor directly, the color barcode is detected and decoded. The decoded results are returned to the user by some interaction like audio. Then, the user touches the button area around the color barcode by the forefinger to operate the target device. This system can provide very easy and natural way for operating the touchscreen to the visually impaired people who usually recognize the materials by the finger. Any mechanical modification of the target device is not needed. The modification can be made by changing its software program. Since the color barcode is sensed by the image sensor without any lens touching the surface of the touchscreen, each bar in the color barcode should be blurred. So, we　develop an easy and simple image processing to handle such problem. We design it as the hardware module to achieve the high performance and low-power wearable device. A prototype hardware using an FPGA shows the hardware size, the performance and the actual demonstration.
Development of Stationary User Interface Using Head-Tracking
Authors: Miyata Kohei , Kitazono Yuhki , Yang Shi Yuan , Seiichi Serikawa
Published: September 2011

Recently, various user interfaces are developed. However the operation of user interface is very difficult for the physically handicapped persons who cannot move their hand. The stationary user interface we are proposing uses head tracking via a camera and a display. It is portable and can operate household appliances. It is also operated intuitively in head tracking.
Methods for the Control of Uncertainty in Multilevel Process Chains Using the Example of Drilling/Reaming
Authors: Haydn Michael , Hauer Thomas , Abele Eberhard
Published: September 2011

Uncertainty during production processes has an important influence on the product quality as well as production costs. For multilevel process chains with serially connected processes, additional uncertainty can be caused by the previous step. The manufacturing of precision holes by drilling and reaming is an important multilevel process chain. The interactions between machine, tool and pre-drilled hole cause process errors during the quality determinant final reaming process. In this paper, a systematic approach for the identification and control of uncertainty during the reaming process is presented. Thus, the influence of key aspects like skewness of pre-drilled hole or the influences of material strength gradients are analyzed. Further, simulation models for the consideration of these uncertainties are presented.
An Approach to Classify Methods to Control Uncertainty in Load-Carrying Structures
Authors: Engelhardt Roland , Koenen Jan F. , Brenneis Matthias , Kloberdanz Hermann , Bohn Andrea
Published: September 2011

Today, a wide variety of methods to deal with uncertainty in load-carrying system exists. Thereby, uncertainty may result from not or only partially determined process properties. The present article proposes a classification of methods to control uncertainty in load-carrying systems from different disciplines within mechanical engineering. Therefore, several methods were collected, analysed and systematically classified concerning their characteristic into the proposed classification. First, the classification differs between degrees of uncertainty according to the model of uncertainty developed in the Collaborative Research Centre CRC 805. Second, the classification differs between the aim of the respective method to descriptive methods, evaluative methods or methods to design a system considering uncertainty. The classification should allow choosing appropriate methods during product and process development and thus to control uncertainty in a systematic and holistic approach.
Influence of Tolerances on Mechatronic Comfort Systems Behavior
Authors: Bohn Martin , Wuttke Fabian
Published: September 2011

In contrast to Robust Design applications for FEM-modeled parts, the simulation of a mechatronic system including both mechanical and electrical parts requires a different strategy for the investigation of its robustness. Differences mainly results from interactions between the mechanical and the electrical part of the mechatronic system. Furthermore, a comfort mechatronic system in the automotive industry is designed customer-oriented. Subsequently, the behavior of its movement and the respective robustness has to be considered too. This paper presents an approach to evaluate robustness of mechatronic comfort systems. Additionally, the approach is applied to sliding doors of vans to prove the practicability to industrial problems.
Early Stage Geometrical Deviation Optimization – An Automotive Example for Sheet Metal Parts
Authors: Bohn Martin , Steinle Philipp , Wuttke Fabian
Published: September 2011

The recent emphasis on car styling caused tolerance requirements for sheet metal parts in the automotive industry to increase. In addition, the new materials (steel and alloy) have a different deviation behavior around the springback after the deep-drawing process. In the early design phases a product can be optimized to fulfill tight tolerance specifications. This work shows the simulation background and the resulting optimization methodology.
Analysis on the Applications of Novel SMA Damper in Seismic Retrofitting of One Teaching Building
Authors: Ling Yu Hong , Ling Hong Hua , Wu Jing Zhuang , Huangfu Chan Yuan
Published: September 2011

According to one three-story RC frame structure, the results of time-history analysis of using re-centring SMA damper to seismic retrofitting are introduced in detail. Damping effect of dampers is studied by index such as floor displacement, story drift, story shear force, energy dissipation, etc., and optimal layout of dampers is also discussed. The analysis results indicate that floor displacement and story drift are decreased greatly after strengthening, and story shear force is controlled to some extent with good effect. The damper dissipates most of the total energy inputting into structure and also has good ability to re-centring. The damper can obtain good energy dissipation when arranged at the maximum story drift, and less energy dissipation when arranged at the smaller story drift.
The Evaluation of Crack Control Safety Level for Concrete Members by Equivalent Guarantee Rate
Authors: Li Yang , Hou Jian Guo
Published: September 2011

This paper put forward a new concept named equivalent guarantee rate, which can be used to evaluate the crack control safety level in concrete design specification more conveniently. As a numerical example, the crack control safety level for civil buildings in GB 50010-2010 “Code for Design of Concrete Structures” is analysized by calculation of equivalent guarantee rate and fuzzy reliability index respectively. The rationality of equivalent guarantee rate is confirmed by comparing the calculation results of the equivalent guarantee rate and the fuzzy reliability index.
Comparison of Analytical Approaches to Tall Building Structural Damage Identification Based on Measured Dynamic Characteristics
Authors: Wei Jian Jun
Published: September 2011

In the past two decades, there are many modal-based indices have been proposed for structural damage identification. In the present study, a modal of a 38-story building was tested on a shaking table to subject to four levels of earthquake, and the acceleration responses at nine floors of the structure are measured and used to construct five damage indices respectively. The experiment makes it possible to verify the applicability of vibration-based identification methods in identifying structure damage without use of structural finite element model. Damage in the structure after experiencing different attacks is evaluated via five modal-based damage indices respectively .By comparing the solution of above indices, it is concluded that the five modal-based indices didn’t have consistency in the identifying and localizing the seismic damage.
A Novel GFRP-FBG Smart Steel Strand and its Properties Research
Authors: Lan Chun Guang , Zhou Zhi , Ou Jin Ping
Published: September 2011

Prestress strands are the key parts of the prestressed structure, and the stress of the prestressed strands is one of the important indicators to assess prestress component security. Unfortunately, up to date, there are no qualified techniques to handle this issue due to that it is too hard for sensors to survive the harsh construction environments and the time-dependent service life of prestressed structures. In this paper, a novel smart steel strand based on the technique of GFRP-FBG rebar was introduced, and its sensing principle has also been given in details. The novel smart steel strand has been tested by serious experiments to research its mechanical and sensing properties. The monitoring results show that the mechanical properties of the smart strands are similar to ordinary strands, and its sensing properties include that distinguish-ability is less than 0.466% F•S, hysteresis less than 2.15% F•S, repeatability less than 1.32% F•S, linearity less than 0.86% F•S, and overall accuracy less than 2.67% F•S. Such kind of GFRP-FBG smart steel strand can be used for both structural and functional materials and applied in practical prestressed structure.
Finite Element Analysis of Effect of Fluid Scour on Piled Pier Bridge
Authors: Wang Xue Qin , Shen Kong Jian , Mao Hua Rong , Zhang Xiao Chun
Published: September 2011

Fluid scour is one of the major causes for bridge failure. To prevent this type of failure, even the catastrophic accidents, it is necessary to make a further study on the effect of fluid scour on mechanic behavior of bridge pier. In this paper, the 3-D finite element model of piled pier and soil interaction is established. The scouring process is simplified for the soil excavation, and the effect of scour on overall stability of piers and bearing behavior of piled pier structure is simulated and discussed. The curves of horizontal, vertical displacement and carrying capacity under various scour depths are drawn in the article. It demonstrates that the effect of fluid scour on piled pier bridge is bad. With these analyses, some useful conclusions in engineering practice are obtained.
Research on the Mechnical Characteristics of Primary Supports in Guanjiao Tunnel Fault Fracture Zone and its Influence Zone by Field Tests
Authors: Li Da , Luo Zhan Fu , Li Yong Sheng
Published: September 2011

The tunnel which excavated through the fault fracture zone is still one of the difficulties in the current tunnel construction. Guanjiao tunnel is the longest high-altitude tunnel in the world, and also the longest railway tunnel which is under construction in China. The 9# shaft which located in Erlang fault fracture zone with several faults, complicated geological conditions is difficult to excavate. In the representative section of F3 fault and its influence zone, F22 fault fracture zone, the monitoring tests on contact pressure between surrounding rock and primary support and stress of steel arch is conducted. According to the above monitoring results，the project recommendations are proposed to ensure the smooth construction of tunnel.
Risk Based Decision Making for Bridge under Multi Hazard
Authors: Wang Zeng Zhong , Zhang Yu Xin
Published: September 2011

The bridges are of much importance to the transportation network system, as they connect key highways at crucial nodes. This paper reviews and discussed risk-based methodologies to assess the risk acceptability and cost-effectiveness of protective measures for bridge under multiple manmade or natural hazards. Three risk acceptance criteria based on fatality risks, failure probabilities and net benefit assessment were described and discussed. The decision support framework accompanying these risk acceptance criteria considers hazard probabilities, value of human life, physical and indirect damages, risk reduction and protective measure costs were studied and an illustrative example was presented.
Nonlinear Earthquake-Response Analysis of Wuhan Junshan Yangtze River under Uniform and Non-Uniform Excitations
Authors: Xu Kai Yan , Wei De Min , Liu Can
Published: September 2011

Wuhan Junshan Yangtze River Bridge is an important traffic hinge on Jing-Zhu freeway, it is very necessary to conduct the comprehensive and systemic investigation on the bridge aseismic. In this paper, the FEM model of it was established; the dynamic characteristic and nonlinear seismic responses under uniform and non-uniform excitations of it were systematic studied. The results show that: 1) the basic cycle of Wuhan Junshan Yangtze River Bridge is about 8.881s. Its first mode of vibration is longitudinal floating mode, which is favorable to the earthquake- response of structures. 2) Its former 40 rank frequency are located between 0.1~2Hz which is avail to the condition of traffic condition.3) the geometric nonlinearity has much influence on the response of this kind of bridge.4) the seismic responses are sensitive to the frequency spectra of the input earthquake wave. 5) The traveling wave excitations are unfavorable to the design of tower and the main girder when considering the three orthogonal seismic wave input. In order to get correct results, artificial seismic wave of the bridge address is necessary to the time-history analysis.
Study on Corroded Detection of Bridge Prestressed Reinforcement Based on the Magnetic Flux Leakage Method
Authors: Zhao Jun , Niu Di Tao
Published: September 2011

As the pretressed reinforcement of prestressed concrete structure leads to rust, it would bring serious disadvantage effect to load capacity of the concrete members and reduce the reliability of all concrete structure greatly more than that of ordinary steel caused. If the prestressed reinforcement can be detected in time, the prestressed concrete structure would be got effective maintenance. In the paper, magnetic leakage testing method used in ordinary steel detection is applied to test the simulation corrosion bug of the prestressed reinforcement in bridge with nondestructive mode. The result of experiment indicates that in the distance of 100 mm from the concrete surface the magnetic leakage testing method can detect effectively the loss ratio of cross-section more than 20 percent of a hank of prestressed strands caused by a part of prestressed strands corroded to break. At last, the paper also puts forward the experiment problems in existence and the improvement methods.