空中加油设备压力闭环测试系统控制器设计

Closed-loop Pressure Controller Design of the Ground Experiment System for Aerial Refueling Devices

某典型空中加油地面试验系统使用液压马达驱动冲压空气涡轮,试验中出现液压马达转速不稳定、系统振荡等问题。本文分析了振荡现象原因,提出了使用基于惯性测量单元的倾角传感器替代常规倾角传感器、电子调速控制器替代原模拟调速控制器的优化方案,建立基于Matlab/Simulink的系统模型,评估优化前后的系统稳定性。仿真表明原系统失稳主要原因在于倾角传感器采样滞后特性;基于惯性测量单元的倾角传感器可有效降低倾角采样滞后,提升系统稳定性。

A hydraulic motor is adopted in a typical aerial refueling device to drive the ram air turbine in the ground experiment system.The rotation speed oscillation of the hydraulic motor is observed.The cause of the system instability is analyzed in this paper,and an optimized plan is proposed,where an Inertial Measurement Unit(IMU)is adopted in a customized sensor to measure the inclination in replacement of the inclinometer,while a digital speed controller substitutes for the original analog controller.The system model is developed based on Matlab/Simulink,and used to evaluate the stability performance.Simulation results confirmed that the inclinometer delay is the cause of oscillation,while the IMU based sensor effectively reduced the delay and improved system stability.