Fractional order PID improved active disturbance rejection control for pneumatic variable load loading system

Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (15) : 116-121.

LIU Fucai1,2, GUO Genwang1,2

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Abstract

In order to study the material performance of the mechanism under complex pressure, a set of pneumatic variable load pressure loading system is designed to simulate complex pressure loading in this paper。However, it is difficult to realize accurate tracking of given waveforms due to the problems of interference, large time delay and nonlinearity in the application of pneumatic pressure loading system. In order to improve the tracking accuracy of the pneumatic variable load pressure loading system, a fractional order PID improved active disturbance rejection controller is designed and applied to the pneumatic variable load pressure loading control. The controller uses fractional order PID to replace the nonlinear state error feedback in the conventional active disturbance rejection controller, therefore, the controller combines the good dynamic performance of fractional order PID controller with the good anti-interference ability of active disturbance rejection controller. Compared with the conventional active disturbance rejection control, the simulation and experiment results show that the algorithm has fast response speed, high tracking accuracy and strong anti-interference ability.
Key words: Pressure loading; Pneumatic loading system; Fractional order improved active disturbance rejection control; Waveform tracking

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Pressure loading; / Pneumatic loading system; / Fractional order improved active disturbance rejection control; / Waveform tracking

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LIU Fucai1,2, GUO Genwang1,2. Fractional order PID improved active disturbance rejection control for pneumatic variable load loading system[J]. Journal of Vibration and Shock, 2022, 41(15): 116-121

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