24 October 2017 The analysis and compensation of errors of precise simple harmonic motion control under high speed and large load conditions based on servo electric cylinder
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Proceedings Volume 10458, AOPC 2017: 3D Measurement Technology for Intelligent Manufacturing; 104581W (2017) https://doi.org/10.1117/12.2285849
Event: Applied Optics and Photonics China (AOPC2017), 2017, Beijing, China
Abstract
Simple harmonic waves and synthesized simple harmonic waves are widely used in the test of instruments. However, because of the errors caused by clearance of gear and time-delay error of FPGA, it is difficult to control servo electric cylinder in precise simple harmonic motion under high speed, high frequency and large load conditions. To solve the problem, a method of error compensation is proposed in this paper. In the method, a displacement sensor is fitted on the piston rod of the electric cylinder. By using the displacement sensor, the real-time displacement of the piston rod is obtained and fed back to the input of servo motor, then a closed loop control is realized. There is compensation of pulses in the next period of the synthetic waves. This paper uses FPGA as the processing core. The software mainly comprises a waveform generator, an Ethernet module, a memory module, a pulse generator, a pulse selector, a protection module, an error compensation module. A durability of shock absorbers is used as the testing platform. The durability mainly comprises a single electric cylinder, a servo motor for driving the electric cylinder, and the servo motor driver.
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Chen-xi Ma, Guo-qing Ding, "The analysis and compensation of errors of precise simple harmonic motion control under high speed and large load conditions based on servo electric cylinder", Proc. SPIE 10458, AOPC 2017: 3D Measurement Technology for Intelligent Manufacturing, 104581W (24 October 2017); doi: 10.1117/12.2285849; https://doi.org/10.1117/12.2285849
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