Flow Nonlinear Analysis and Compensation Control Validation for High-speed On-off Valve

doi:10.3969/j.issn.1000-1093.2015.01.024

Abstract

Abstract: The nonlinear control methods of compensated pulse width modulation(PWM) control based on the dead and saturated zones and PWM-PFM(pulse frequency modulation) control are presented for the dead, saturated and non-linear zones in the flow control of high-speed on-off valve, which are compared with the PWM control and the traditional PWM control. The flow characteristic of HSV with the nonlinear control is analyzed and simulated, and a hydraulic loop controlled by HSV is set up to verify the nonlinear control by simulation and experiment. The result shows that the nonlinear control method compensates the dead, saturated and nonlinear zones in the terms of duty ratio and frequency and can linearizes the flow with the duty ratio of 0%~100%; the large tracking error resulting from the dead zone and saturated zone is avoided effectively in simulation and experiment.

Key words: mechanics, high-speed on-off valve, flow characteristic, nonlinear control, pulse width modulation control, pulse frequency modulation control

CLC Number:

TH137.7

LIU Zhi-hao, GAO Qin-he, GUAN Wen-liang. Flow Nonlinear Analysis and Compensation Control Validation for High-speed On-off Valve[J]. Acta Armamentarii, 2015, 36(1): 163-174.

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