高空舱进气环境压力模拟鲁棒模型预测控制

Robust Model Predictive Control for High-Altitude Cabin Intake Environmental Pressure Simulation

中文关键词:  高空舱  压力模拟  鲁棒模型预测控制  过渡态试验  最优控制

英文关键词:high-altitude cabin  pressure simulation  robust model predictive control  transition state test  optimal control

中文摘要:

      针对航空发动机高空环境模拟过渡态试验对高空舱进气环境压力模拟系统提出的强抗扰性、强鲁棒性等控制综合品质要求，设计了一种基于鲁棒模型预测控制（Robust Model Predictive Control,RMPC）的高空舱进气环境压力控制方法。RMPC采用滚动时域优化和扰动反馈补偿的方法，在预测控制框架内处理模型的不确定性。通过建立进气环境压力模拟系统设备特性模型，设计了基于RMPC的进气环境压力控制策略，搭建了仿真平台，与线性自抗扰控制(Linear Active Disturbance Rejection Control,LADRC)方法进行了对比分析。仿真结果表明,应用RMPC技术后，动态调节时间由7.68 s缩短至3.91 s，最大瞬时波动量由0.94%减小至0.25%，该技术能够大幅提高发动机高空环境模拟过渡态试验中进气环境压力模拟的动态响应速度、控制精度和抗扰能力。

英文摘要:

      Aiming at the comprehensive control quality requirements of strong disturbance rejection and robustness for high-altitude cabin intake environmental pressure simulation system in aeroengine high-altitude environmental simulation transition state tests,a high-altitude cabin intake environmental pressure control method based on robust model predictive control (RMPC) is proposed.RMPC adopts the method of rolling-time domain optimization and disturbance feedback compensation to deal with the model uncertainties within the predictive control framework.By establishing the equipment characteristic model of the intake environmental pressure simulation system,an intake environmental pressure control strategy is designed,a simulation platform is set up,and a comparative analysis is conducted between the linear active disturbance rejection control (LADRC) and the proposed RMPC.The simulation results indicate that the proposed RMPC technology can reduce the dynamic adjustment time from 7.68 s to 3.91 s and decrease the maximum instantaneous fluctuation from 0.94% to 0.25%.The proposed RMPC significantly enhances the dynamic response speed,control accuracy and disturbance rejection capability of the intake environmental pressure simulation in the aeroengine high-altitude environmental simulation transition state tests.