微分控制在永磁伺服系统中的应用研究

PI调节器用于系统闭环控制时，为保证系统有快速响应，超调是不可避免的。为了减小和消除超调，本文研究微分控制(微分调节，微分反馈)对抑制系统响应超调的作用。通过求解微分方程的实时解，分析微分控制对闭环系统阻尼比及闭环零、极点的影响。对实际的永磁同步伺服系统引入微分反馈控制，使系统既有较快的响应速度，又不至出现响应超调，从而使系统具有优异的响应性能。仿真和实验均证实了微分反馈对系统控制的有效性。

Applied Research on Differential Control in Permanent Magnet Servo System

When proportional-integral (PI) regulator was used in closed loop control of system, the overshoot was unavoidable to ensure fast response of the system. In order to minish or eliminate the overshoot, the function of differential control (differential adjust and differential feedback) on resisting response overshoot of the system was studied. By means of discussing the solution of differential equation, the influence of differential control on damp coefficient of closed-loop system, closed-loop zero and pole was analyzed. The differential feedback was adopted to practical permanent magnet synchronous servo system, and the response speed of system can be very fast without overshoot, so that the system was provided with excellent response performance. The numerical simulation and experiment of system approved validity of the differential feedback control in system.