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在位置控制电液伺服系统中,常采用局部速度和加速度反馈校正的方法来提高系统的动态性能。但传统的设计方法不严密,需要反复试探来调整诸反馈增益。本文从线性状态变量反馈的观点推导出这种系统的一组最佳参数计算公式,从而可以方便地求出最佳控制时所需的硬设备参数.为了将状态空间设计法与传统设计法进行比较,并判断所设计系统是否令人满意地符合传统的性能指标,文中给出计算系统频率特性的BASIC程序。该程序稍加修改亦可通用。本文通过地震模拟振动台电液伺服系统的实例介绍状态空间设计法,并给出某些计算结果及用BASIC 程序算出的频率特性,所得结果与该系统实测结果相符。
In the position control electro-hydraulic servo system, the local velocity and acceleration feedback correction methods are often used to improve the dynamic performance of the system. However, the traditional design method is not rigorous, need repeated testing to adjust the feedback gain. In this paper, a set of optimal parameters calculation formulas of this system are derived from the viewpoint of linear state variables feedback, so that the hardware parameters needed for optimal control can be easily found out.In order to make the state space design method and the traditional design method Compare and judge whether the designed system meets the traditional performance index satisfactorily. The BASIC program to calculate the frequency characteristic of the system is given in this paper. The program can be modified a little common. In this paper, the state space design method is introduced by the example of the seismic simulation electro-hydraulic servo system. Some calculation results and the frequency characteristics calculated by BASIC program are also given. The results are consistent with the measured results of this system.