基于前馈反馈复合控制策略的高空舱高精度电液伺服控制技术

High precision electro-hydraulic control in altitude test facility based on feedforward-feedback compound strategy

为满足高空舱飞行环境模拟控制系统电液伺服位置控制回路高精度、高响应的需求,采用系统仿真和工程实用控制系统设计与调试相结合手段,依次分析并建立了高空舱电液伺服位置控制回路的数学模型;在Matlab&Simu⁃link平台上进行了控制仿真调试与分析,表明所得到的电液伺服位置控制回路可满足高精度控制要求;在控制系统仿真分析的基础上,对实际的控制系统进行了前馈+反馈校正、串级控制等工程改进工作。经实际飞行环境模拟试验验证,工程实现后的电液伺服位置控制回路取得了理想的动态响应和位置跟踪能力,保证了高空台飞行环境模拟控制系统的过渡态调节品质和稳态调节精度。

To meet the requirements of the electro-hydraulic position tracking control loop in ATF(Alti⁃tude Test Facility)on high resolution and fast reaction,the combination of simulation and engineering sys⁃tem commissioning was utilized.The mathematical model of electro-hydraulic position tracking control sys⁃tem was built according to the operating sequence.Then,simulation and analysis were implemented on Mat⁃lab&Simulink,showing that the high-resolution requirements were satisfied.Furthermore,based on simula⁃tion analysis of control system,the cascade control,feedforward-feedback calibration and non-linear com⁃pensation were improved.Results of flight test demonstrates that the electro-hydraulic position tracking sys⁃tem works much better on desired dynamic reaction and position tracking,ensuring the transient state con⁃trol and steady state control precision in ATF test.