直驱阀控制系统设计及验证

为提高直驱阀系统的动态特性和稳定性,设计了1种位置环加电流环的直驱阀双闭环控制系统,其中位置环采用比例积分控制加相位超前校正,电流环采用比例积分控制。在MATLAB平台上,开展了电流环仿真、位置环的参数辨识以及仿真;在由DSP和FPGA构成的验证平台上,开展了试验验证,电流环与位置环的控制效果与仿真模型均一致,获得了400 Hz以上的电流控制带宽和25 Hz以上的位置控制带宽。研究结果表明:此控制器设计及校正方法可有效提高直驱阀系统的动态特性和稳定性。

Design and Verification of Direct Drive Valve Control System

In order to improve the dynamic characteristic and stability margin of the direct drive valve system,a double-loop control system of Direct Driver Valve which include a position control loop and a current control loop was designed.The position control loop was designed into controller which composed a PI controller and a lead correction link,and the current loop controller was designed into a PI controller.A simulation work of the current loop was carried out in MATLAB,and so did the model identification and the simulation work of the position loop.A verification experiment was carried out in a DSP and FPGA based on experimental platform,both the current loop controller and the position loop controller can obtain similar performance with simulation.The current loop can obtain a wide bandwidth up to 400 Hz,and the position loop bandwidth can be up to 25 Hz.The results show that the design and the correction method can improve the dynamic characteristics and stability margin of the DDV system obviously.