气动比例位置系统速度反馈与不完全微分PID控制

doi:10.16180/j.cnki.issn1007-7820.2020.04.012

Abstract

Abstract:

Pneumatic technology has been widely used in various fields. The optimization of pneumatic proportional position control system has been the inevitable trend of development. This study established the mathematical model of the pneumatic proportional position system, drew the Bode diagram of the system and verified its stability. The response time, accuracy and stability of the pneumatic proportional position system were analyzed by introducing velocity feedback and combining with the incomplete differential PID. The simulation results showed that the step response curves of the system with speed feedback and incomplete differential PID correction could reduce the response time by 2.1 s and the steady-state error by 0.22 mm compared with those of uncorrected, ordinary and incomplete differential PID correction. The response time and steady-state error decreased in turn, and the response process was more stable. The incomplete differential PID correction with speed feedback was introduced, so that the sinusoidal tracking error was smaller, the stability was stronger, and the tracking effect was better. Therefore, while the response speed of the system was greatly improved, the accuracy of the system was significantly increased. These results demonstrated that the dynamic and static characteristics of the system were significantly improved.

Key words: pneumatic, position control, proportional, PID, incomplete differential, speed feedback

CLC Number:

TP211

SUN Ruifang,ZHANG Xiaolong,LIANG Wenkai,XIE Xiaoquan. Speed Feedback and Incomplete Differential PID Control of Pneumatic Proportional Position System[J].Electronic Science and Technology, 2020, 33(4): 65-70.

Figures/Tables 11

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校正方法	响应时间/s	稳态误差/mm
无校正	2.5	0.024
普通PID	1.0	0.012
不完全微分型PID	0.7	0.005
引入速度反馈的不完全微分型PID	0.4	0.002

Speed Feedback and Incomplete Differential PID Control of Pneumatic Proportional Position System

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