Abstract
液压角振动台是十分复杂的非线性系统，应用传统的控制系统设计方法很难满足其控制要求。针对随机振动要求振动试验系统具有高频响性能的特点，建立了阀控马达系统的数学模型，根据极点配置原理设计了有效拓展系统频宽的三状态控制器。提出基于自适应滤波器频响函数辨识方法进行复合迭代控制，并研究了不同阀控马达频响函数估计方法对随机复现振动控制精度的影响效果。将仿真结果与实验数据进行对比分析，验证了三状态控制策略拓展系统频宽的有效性和自适应滤波器频响函数估计的准确性。 Hydraulic angular vibration table is a kind of complex and non-linear system. Applying traditional controller to the angular vibration system, it is difficult to make the control performance to a high level. Aiming at the demand of high frequency response for the random vibration system, this paper built up the mathematical model of hydraulic motor controlled by valves, and according to the principle of pole assignment, this paper designed the three variables controller for the electro-hydraulic servo angular vibration table, which can extend the system bandwidth. This paper proposes the random vibration composite iteration control algorithm based on the frequency response estimator using self-adapting filter. The control precision of the different frequency response estimators was analyzed. Comparing simulation with experiment, the results show that three variables controller is favorable to improve system’s frequency response and the frequency response estimator using self-adapting filter is accurate for random vibration replication control.
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