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为满足航天器微振动环境模拟的需要,开展了多自由度微振动时域波形复现控制方法研究。首先,介绍了基于时域波形复现的多自由度微振动环境模拟控制理论方法。其次,针对六自由度微振动激励系统,应用MATLAB软件建立了基于实测传递函数矩阵的多输入多输出微振动激励仿真系统,针对微振动时域波形复现闭环控制过程进行了算法编程,并给出了仿真的闭环控制流程图。最后,通过算例对多自由度微振动时域波形复现进行了数值仿真,以给定的白噪声为输入,模拟对实际存在的系统非线性、测量误差等影响因素的控制效果。仿真结果验证了多自由度微振动时域波形复现控制方法的可行性及有效性,所得结论可以为研究多自由度微振动时域波形复现控制系统提供参考。
In order to meet the micro-vibration environment simulation of spacecraft, multi-degree-of-freedom micro-vibration time-domain waveform recurrence control method is studied. First of all, the theory of multi-DOF micro-vibration environment simulation control based on time-domain waveform representation is introduced. Secondly, aiming at six-DOF micro-vibration excitation system, a simulation system of multi-input multi-output micro-vibration excitation based on measured transfer function matrix is established by using MATLAB software. The algorithm is programmed for the micro-vibration time-domain waveform recurrence closed- The simulation closed-loop control flow chart. Finally, a numerical example is given to simulate the multi-degree-of-freedom micro-vibration time-domain waveform recurrence by means of a numerical example. The given white noise is input to simulate the control effect on the actual system nonlinearity, measurement error and other influencing factors. The simulation results verify the feasibility and effectiveness of multi-degree-of-freedom micro-vibration time-domain waveform recurrence control method. The conclusion can provide references for the study of multi-degree-of-freedom micro-vibration time-domain waveform recurrence control system.