摘要
在永磁同步电机调速系统中,传统PI控制的阶跃响应存在超调的问题。采用IP控制虽可消除超调,但会使系统响应变慢。为此,提出带给定增益的PI控制器,在传统PI控制器的基础上,引入输入微分前馈,将误差比例环节拆成给定比例环节和反馈比例环节之差,并在给定比例环节中增加给定增益M。经优化设计,M在阶跃给定时取0.5,可实现阶跃响应的快速无超调;M在时变给定时取1,可实现无误差跟踪。为使系统能够对阶跃给定和时变给定同时具有很好的跟踪性能,在带给定增益的PI控制器的基础上,利用给定变化率判断给定类型并自动选择对应的最优增益,构成一种变给定增益PI控制器。实验结果验证了所提控制方法的有效性和实用性。
In the permanent magnetic synchronous motor （PMSM） speed adjusting system, the overshoot of step response is hard to avoid in the conventional proportional integral （ PI） controller. Although IP control can eliminate overshoot, the response becomes slow. In this paper, a PI controller with input gain is proposed, which adopts input derivative feedforward （IDF） . The controller changes the error proportion into the difference between the input proportion and the feedback proportion, and then adds input gain M to the input proportion. Through optimization design, the response of the step input is fast and non-over shoot when M equals 0. 5. Meanwhile, the response of the time-varying input is error-free when M equals 1. In order to ensure the tracking performance under the step input and the time-varying input simultaneously, a variable structure PI controller is proposed. Based on the PI controller with input gain, the variable input gain PI controller judges the input type according to the input gradient, and then chooses the corresponding optimal gain automatically. Extensive experiments are performed to verify the validity and practicality of the proposed controller.
出处
《电工技术学报》
EI
CSCD
北大核心
2017年第1期168-174,共7页
Transactions of China Electrotechnical Society
基金
国家自然科学基金项目(51377076)
江苏省"六大人才高峰"项目(YPC13013)
江苏省产学研资金项目(BY2014003-09)资助
关键词
永磁同步电机
PI控制
IP控制
超调输入
微分前馈
Permanent magnetic synchronous motor, PI control, IP control, overshoot input, derivative feed forward
