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利用最小二乘参数估计原理对调距桨电液伺服系统进行系统参数辨识。基于开环辨识、闭环验证的思路,设计出辨识试验方案,利用MATLAB系统辨识工具箱对采集到的数据进行预处、模型定阶和ARX参数估计,获得系统开环模型;利用Simulink对辨识得到的模型进行闭环仿真,将仿真结果与台架实验数据进行对比分析。初步尝试了系统辨识在调距桨伺服系统上的应用。
System parameter identification of electro-hydraulic servo system of pitch propeller is carried out by using least square parameter estimation principle. Based on the idea of open loop identification and closed-loop verification, a scheme of identification experiment was designed. The system was identified by MATLAB toolbox to preprocess the collected data, model order and ARX parameter estimation to obtain the system open-loop model. Simulink was used to identify, Closed loop simulation of the model, the simulation results and bench test data for comparative analysis. At first, the application of system identification in pitch servo system is attempted.