Motor speed robust control with multiplying nonlinear property
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摘要: 变转速变排量联合控制是一种新型的容积控制,具有效率高和相对快的响应,但由于具有相乘的本质非线性,给控制带来一定的难度.针对变频调速变排量联合控制的泵控马达速度试验系统,建立了系统的数学模型,对存在的本质非线性问题,提出采用精确反馈线性化方法进行线性化处理,并设计了基于积分滑模面的马达速度滑模变结构控制器.由于系统参数多,各个参数是变化的且不易确定,造成常规的滑模变结构控制输出抖振现象严重,为降低输出抖振现象,提出采用自适应模糊滑模控制器进行改进,并对稳定性进行证明.最后对该控制方法的抗干扰性和正弦信号跟踪性进行了仿真试验,仿真结果验证了所设计的控制方法正确性.Abstract: The control method that combined variable speed and variable displacement is a new type of cubage control. It has the advantages of high efficiency and relative fast response. But its multiplicative essential nonlinear property causes trouble to control. To the pump controlled motor speed system with frequency inverter and variable displacement, its mathematical model was established. To the problem of essential nonlinear property, the exact feedback linearization method was put forward in the linear process, and the motor speed sliding mode control(SMC) with integral sliding surface was designed. Considering the system with multiple parameter, the parameters were variable and difficult to be determined. All this leaded to the more chatting phenomenon in the output. to debase it, the adaptive fuzzy SMC was used to improve it, and its stability was proved. The anti disturb ability and sinusoidal track ability simulation were done. The simulation results show the validity of this control method.
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