作者：
Wang, Xiangjiang;Alici, Gursel*;Chuc Huu Nguyen
作者机构：
[Wang, Xiangjiang] Univ South China, Sch Mech Engn, Hengyang 421001, Peoples R China.;[Alici, Gursel] Univ Wollongong, Sch Mech Mat & Mechatron Engn, Wollongong, NSW 2522, Australia.
会议名称：
IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM) - Mechatronics for Human Wellbeing
会议时间：
JUL 09-12, 2013
会议地点：
Wollongong, AUSTRALIA
会议主办单位：
[Wang, Xiangjiang] Univ South China, Sch Mech Engn, Hengyang 421001, Peoples R China.
会议论文集名称：
IEEE ASME International Conference on Advanced Intelligent Mechatronics
摘要：
Conducting polymer actuators which are capable of operating in air or liquid media under low actuation voltages can be used as macro and micromanipulation devices. However, their positioning accuracy is adversely affected by their hysteresis nonlinearity. In this paper, we establish a Duhem hysteresis model for conducting polymer actuators, which is a rate-independent hysteresis model. The hysteresis model is experimentally identified and integrated with the linear transfer function of the actuator to build a more accurate actuator model.
摘要：
In this paper, we study the character of solute transport in in-situ leaching of uranium in some sandstone uranium deposit in Xinjiang and analyze the effect of convection, molecular diffusion, mechanical dispersion, adsorption, chemical reaction and radioactive decay on migration and distribution of solute in sandstone uranium deposit. The process of in-situ leaching of uranium in sandstone uranium deposit and shrinkage model of leaching core is divided into 3 interfaces, basic equation of solute transport of in-situ leaching of uranium in homogeneous isotropic sandstone uranium deposit is derived, based on law of mass conservation, the hydrodynamic dispersion coefficient and retardation coefficient of solute transport are determined by analysis-optimization method, the calculated values of solution concentration are consistent with the ones of fitting curve of experimental test values by analysis-optimization parameters and the efficiency of our mathematical model is verified through field test of in-situ leaching.
作者机构：
[Li Guoping] Ningbo Univ, Fac Engn, Ningbo, Zhejiang, Peoples R China.;[Zhang Chunliang] Nanhua Univ, Coll Mech Engn, Hengyang, Hunan, Peoples R China.
会议名称：
IEEE International Conference on Robotics and Biomimetics (ROBIO 2005)
会议时间：
JUL 05-09, 2005
会议地点：
Hong Kong, PEOPLES R CHINA
会议主办单位：
[Li Guoping] Ningbo Univ, Fac Engn, Ningbo, Zhejiang, Peoples R China.^[Zhang Chunliang] Nanhua Univ, Coll Mech Engn, Hengyang, Hunan, Peoples R China.
关键词：
active vibration control;bionic mechanics;isolation platform;LQG
摘要：
Based on the bionics mechanics, a vibration isolation platform is developed. This system uses air springs and rubber layer as passive vibration isolation elements and giant magnetostrictive actuators as active vibration isolation elements. Actuators and air springs are arranged in parallel. The air springs and the rubber layer of the passive system are synthesized so as to minimize the root-mean-square values of amplitude of the isolation platform and the discrete time LQG controller based on a state space model is employed for controlling actuators. Simulation studies show that the developed active vibration control system has good isolation performance against the floor disturbance over wide frequency area. For random or white noise excitation, the amplitude of isolation platform is reduced to approximately 15% by the active control system.
摘要：
According to the traditional tooth profile, modification process cannot meet the traction gear's technical requirements of the high-speed locomotive. A new way for the tooth profile modification technology was provided in the paper. The slotting profile modification process was proposed, the formulating methods of the tooth profile modification K diagram was introduced, modification curve fit as the sections of involutes, the modification profile angles of slotting cutter corresponding sections of involutes was deduced using the profile angle error analysis theory and the tooth profile of modification slotting cutter precision was designed. The feasibility and advantages of modification slotting cutter were validated by examples, which indicates the widely use of this technology in high-speed locomotive traction gear.
摘要：
This paper studied the real-time performance of three-tier client/server architecture used in remote monitoring system. A scheduling algorithm was adopted in middleware of this architecture, which based on the regulation: setting the priority of task according to the percentage of useful data in the data-buffer or the LAD (most locally available data first) but not according to the earliest deadline. Contrast simulation of the improved algorithm and EDF (earliest deadline first algorithm) had been achieved from program developed using VC++ at different average task lengths and update workloads under the tentative parameters such as the size of data in different data-buffer, the time used for fetch an object from these data-buffers and average task inter-arrival time. The results showed that the LAD's completed task percentage before deadlines was higher than EDF, which proved LAD was more suitable to improve the real-time performance of three-tier client/server architecture.
摘要：
A kind of signal build mould and identification tool for roller of rolling mill was discussed. Basic algorithm of Hidden Markov model (HMM) theory was presented. For psi 500x2 shrewd roller of rolling mill, the paper led Short-time Fourier transform (STFT) into draw the feature of roller signal and chose Continues Gaussian Hidden Markov Model (CGHMM) to build and identify mould. The experiment installation major included: psi 500x2 shrewd rollers and roller performance test control work of rolling mill control machine as well as a set of online state inspection system. The experiment data was collected by two kinds: roller rotational speed from low to high and from high to low. The experiment shows that this system has better identification rate, and proves that this system is effective.
摘要：
With medical image three-dimensional reconstruction software reconstruct three-dimensional model of the pelvic, Not only the principle of aiming device design is introduced, but also deduces the relationship between the measurements of pre-operative pictures and the angles of drilling ringers of the aiming device, and also compiles applied software for numeration, By the virtual prototype on aiming device of setting screws in acetabulum anterior column, the doctors can simulate the operative environment before operation, The study provides a dependable approach to advance the accuracy rate during operation of acetabulum anterior column setting screws deeply.
作者机构：
[Lin, Guo-Xiang; Chen, Ai-Hua; Tang, Yong-Hui] Univ South China, Sch Mech Engn, Hengyang 421001, Hunan, Peoples R China.
会议名称：
International Conference on Design, Manufacturing and Mechatronics (ICDMM)
会议时间：
APR 17-18, 2015
会议地点：
Adv Sci Technol & Ind Res Ctr, Wuhan, PEOPLES R CHINA
会议主办单位：
[Lin, Guo-Xiang;Chen, Ai-Hua;Tang, Yong-Hui] Univ South China, Sch Mech Engn, Hengyang 421001, Hunan, Peoples R China.
关键词：
Evidence theory;ventilation equipment and facilities;reliability
摘要：
A new solution to the reliability evaluation of mine ventilation equipment and facility was proposed using the combined method of evidence theory and neutral network. The outputs of multiple BP neural networks were firstly used as the basic probability distribution function of evidence theory. Then data fusion was conducted and the security degree of ventilation system was obtained according to the rules of evidence combination. The example showed that the result of this method was reasonable, objective and also very effective to the reliability evaluation of mine ventilation equipment and facility. The output of single BP neutral network was unstable. Therefore, the effect of the number of BP network on the instability of network was also analyzed by comparing the uncertainty after data fusion in different number of selected BP networks.
摘要：
In this paper, a Prandtl-Ishlinskii hysteresis model (PI) is used to build a rate-independent hysteresis model for a class of conducting polymer actuators typified by tri-layer conjugated polymer actuators. Firstly, an off-line method is proposed to identify a discretization density function for the hysteresis model, and then a linear transfer function for the actuator is identified using the PI inverse model. Secondly, a neural network approach is proposed to realize an adaptive on-line identification method for the density function of the PI hysteresis model. In the back propagation (BP) algorithm for the neural network, the discretization PI operator is considered as an operational function of the neural network and the density function is considered as the power value. Finally, the simulation and experimental results are presented to demonstrate the validity of the model identification method and the actuator model.
摘要：
In this paper, the thermal spraying powder, which was made by sintering, was respectively mixed by Cr2O3 and glass glaze at the mass ratio of 85%, 95%, and 100%.The three mixed powders were sprayed on the surface of 45 steel by CP-3000 subsonic spray gun. Then the samples were heated in the resistance furnace until the temperature reached 1050 degrees C. At room temperature,the wear resistance of these three kinds of coatings were investigated along with load and time changing under water lubricating. The impact of glass glaze on coatings was found after analyzing the change of the weight loss of the coatings. The result showed that there was not the shedding of splat except some brittle micro-peeling at the rim of splat and furrow on the surface of 85% and 95% Cr2O3 ceramic coatings. The wear resistance of the coatings was improved with the increase of the percentage of glass glaze, and began to desend when the percentage arrived at a certain degree. It indicated that the wear resistance was the best when the percentage was about 95% in this experiment.
