无刷直流电机驱动系统多模态控制  

Multi-mode Control of BLDCM Drive System

作　　者：修杰[1] 

机构地区：[1]天津大学电气与自动化工程学院,天津300072

出　　处：《微电机》2009年第2期44-47,共4页Micromotors

摘　　要：无刷直流电机的非线性特性使得采用经典的PID控制难以取得较好的控制效果,为此将多模态控制策略应用于无刷直流电机的控制:根据系统响应过程中的误差大小,在误差较大时采用比例控制,以加快系统的响应速度;当误差小于设定的阀值时,采用具有适应性强、可采用专家知识、鲁棒性强、不需被控系统的数学模型的模糊控制,以增加阻尼,减小超调;当误差在模糊控制语言值为零的范围内时,采用具有积分环节的PI控制,以消除稳态误差,达到高精度控制。通过采用这种多模态控制策略,加快了系统的响应速度,减小了超调,消除了稳态误差。实验结果证明,采用这一控制策略,系统动态响应快、超调小、稳态精度高、抗扰动能力强、鲁棒性强。The nonlinearity of brushless DC motor （BLDCM） made it hard to get a good control performance with the conventional PID controller. Therefore, in this paper, multi-mode control was applied to the control of BLDCM. According to the error in the transient period, when the error was big, proportional control was adopted. While the error was within the threshold, fuzzy logic control was applied to increase damp and reduce overshoot. Fuzzy logic had advantage of adaptive, expert control knowledge based, robustness and system mathematical model free. It had the advantage of flexibility, adaptive, expert knowledge based, robustness, model free and high control precision. When the error was within the fuzzy linguistic variable zero, PI controller was applied to eliminate the steady state error. Through the applying of multi-mode control strategy, the response of the system was improved and overshoot was reduced and steady state error was eliminated. Experimental results demonstrated that a good control performance was achieved. The system responses quickly with little overshoot. There was no error in steady state. The system showed a strong ability to reject disturbance and a strong characteristic of robustness.

关 键 词：无刷直流电机 多模态控制 比例控制 模糊控制 PI控制 

分 类 号：TM361[电气工程—电机]