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.
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：
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.
