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Optimization design of two-stage amplification micro-drive system without additional motion based on particle swarm optimization algorithm

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Visual Computing for Industry,Biomedicine,and Art 2022年第1期5卷 340-351页

作者： Manzhi Yang Kaiyang Wei Chuanwei Zhang Dandan Liu Yizhi Yang Feiyan Han Shuanfeng Zhao School of Mechanical Engineering Xi’an University of Science and TechnologyXi’an 710054China Department of Mechanical and Aerospace Engineering Brunel University LondonUxbridge 361199UK School of Humanities and Foreign Languages Xi’an University of Science and TechnologyXi’an 710054China

With the increasing requirements of precision mechanical systems in electronic packaging,ultra-precision machining,biomedicine and other high-tech fields,it is necessary to study a precision two-stage amplification micro-drive system that can safely provide high precision and a large amplification *** view of the disadvantages of the current two-stage amplification and micro-drive system,such as poor security,low motion accuracy and limited amplification ratio,an optimization design of a precise symmetrical two-stage amplification micro-drive system was completed in this study,and its related performance was *** on the guiding principle of the flexure hinge,a two-stage amplification micro-drive mechanism with no parasitic motion or non-motion direction force was *** addition,the structure optimization design of the mechanism was completed using the particle swarm optimization algorithm,which increased the amplification ratio of the mechanism from 5 to 18 times.A precise symmetrical two-stage amplification system was designed using a piezoelectric ceramic actuator and two-stage amplification micro-drive mechanism as the micro-driver and actuator,*** driving,strength,and motion performances of the system were subsequently *** results showed that the driving linearity of the system was high,the strength satisfied the design requirements,the motion amplification ratio was high and the motion accuracy was high(relative error was 5.31%).The research in this study can promote the optimization of micro-drive systems.

关键词： Particle swarm optimization Micro-drive mechanism two-stage amplification Optimization design Performance of guidance

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Design of a weak bioelectric signal acquisition circuit

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Journal of Measurement Science and Instrumentation 2021年第1期12卷 20-26页

作者： ZHOU Mingjuan WANG Yuyuan RAN Li Shaanxi Railway Institute Weinan 714000 China Xi’an University of Technology Xi’an 710048 China

A surface electromyography(sEMG)signal acquisition circuit based on high-order filtering is *** use a two-stage adjustable amplifier and a high-order Sallen-Key bandpass filter to solve the problems of non-adjustable amplification gain and low filtering order in traditional acquisition *** experimental results show that the designed sEMG signal acquisition device can eliminate power frequency interference effectively,the stopband drop of the filtering part reaches approximately-100 dB/dec,which can effectively extract useful signals between 20-500 Hz,and the amplification gain reaches 60 dB.

关键词： surface electromyography(sEMG) two-stage amplification high-order filtering interference suppression power frequency noise

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