Electronic Science and Technology ›› 2020, Vol. 33 ›› Issue (4): 65-70.doi: 10.16180/j.cnki.issn1007-7820.2020.04.012

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

SUN Ruifang,ZHANG Xiaolong,LIANG Wenkai,XIE Xiaoquan   

  1. Shool of Mechanical Electrical Engineering,Kunming University of Science and Technology,Kunming 650000,China
  • Received:2019-03-15 Online:2020-04-15 Published:2020-04-23
  • Supported by:
    Scientific Research Foundation Project of Kunming University of Technology(KKSY201220155)


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