新型电动负载模拟器的控制器设计

Design of Novel Controller for Motor-driven Load Simulator

现有的电动负载模拟器大多采用力矩单闭环的控制结构,因此,人们难以随意控制电流的动态过程以及快速而精确地跟踪力矩。针对这一问题,提出了采用力矩、电流双闭环控制来构造电动负载模拟器的方法;并根据系统的频率特性,采用极点配置和前馈补偿相结合的混合校正策略来改善系统的动态跟踪品质,最后给出了多余力矩的前馈补偿方案。仿真和试验结果验证了该方法的有效性。

Single-closed-loop torque control structure has been used in most of the existing motor-driven load simulators. With such simulators, it is hard to control dynamic process of control current at will, and to track the torque precisely and rapidly. Aiming at the problem, the method by using torque-current double-closed-loop control for building the motor-driven load simulator is proposed. In addition, in accordance with the frequency characteristic of the system, by adopting combined correction strategy of pole placement and feed-forward compensation, the dynamic tracking quality of the system is improved, and the method of surplus torque feed-forward compensation is also given. The results of simulation and test verify the effectiveness of the method.