直驱阀用音圈电机的模糊非线性PID控制

A Fuzzy Nonlinear PID Control of Voice Coil Motor Used in Direct Drive Valve

针对基于音圈电机的直驱阀系统中存在液动力负载扰动对系统的稳、动态性能有较大影响的问题,以及经典PID控制所存在的不足,在建立基于音圈电机的直驱阀系统数学模型的基础上,提出一种位置环/电流环的双闭环控制结构。位置环采用非线性PID(Nonlinear PID,NLPID)控制,给出了位置环模糊NLPID控制器的具体设计方法,并通过与模糊控制相结合,实现控制参数的自整定。仿真及实验结果表明,在相同的扰动情况下,该控制策略具有比经典PID控制器及模糊PID控制器更好的抗干扰性和鲁棒性,稳、动态性能也更优。

The hydrodynamic force disturbances in direct drive valve based on voice coil motor（VCM-DDV） have greater impact on system performance.There are some weaknesses in classic Proportion integration differentiation（PID）control.In this paper,a mathematical model of the VCM-DDV is established.A double-closed loop control structure composed of position loop and current loop is presented.A novel nonlinear PID（NLPID） control strategy is applied in position loop.Fuzzy control is used to achieve self-tuning of control parameters.The design method of NLPID controller in position loop is presented in detail.Simulation and experimental results show the control strategy has a better anti-interference and robustness,superior stability and dynamic performance than classic PID and fuzzy PID in the same disturbance.