基于双回路控制的电动负载模拟器研究

Research of Electric Load Simulator Based on Double-loop Control

电动舵机负载模拟器可在实验条件下模拟飞行器飞行过程中舵机受到的空气动力铰链力矩,是半实物仿真的重要设备。在介绍电动负载模拟器研究进展并指出目前伺服系统研究所面临的难题的基础上,以改善系统动态频响为目标,设计基于双回路电机的加载方案并建立双回路系统的数学模型;通过系统仿真,分析系统输出力矩对指令力矩的跟踪能力,验证数学模型的准确性。结果表明:双回路方案有效地抑制了系统多余力,其工作频带在舵机扰动的情况下仍可达35 Hz,为电动负载模拟器提供了一种频带更高、匹配性更好的实现方案。

Electric load simulator,which can simulate aerodynamic loads acting on aircraft rudder during flight under laboratory conditions,is an important equipment in hardware in loop simulation.The article introduces the contemporary research progress and the challenges confronted with electric load simulator.In order to improve the dynamic frequency response,a kind of double loop motor driven load simulator with rapid response is introduced.The mathematical model of the load simulator is established and is verified by the comparison of output torque and command torque.It is indicated that the double loop load simulator restrains the disturbance torque effectively,and can reach the frequency band at35Hz with steering gear perturbation under simulation circumstances.The research provides an implementation with higher frequency and better compatibility for electric load simulator.