【摘要】 随机振动模拟试验通过时域波形再现非平稳的振动环境,广泛应用于各类产品的可靠性检测。电液振动台是大型结构件进行模拟试验的关键设备,在随机振动环境下,传统三状态控制器无法同时消除电液振动台干扰力与模型不确定性的影响,以单轴电液振动台作为控制对象,利用滑模控制策略,抑制电液振动台系统在随机振动环境中不确定干扰力的影响,利用自适应逆控制器补偿模型不确定性问题,实现振动台加速度随机振动控制。通过MATLAB/Simulink对该复合控制策略进行随机振动仿真分析,验证控制策略的有效性。更多还原

【Abstract】 Random vibration simulation test reproduces non-stationary vibration environment through time domain waveform, which is widely used in reliability testing of various products. Electro-hydraulic shaking table is the key equipment for simulation test of large structural parts. Under the random vibration environment, the traditional three state controller can’t eliminate the electrohydraulic vibration table at the same time interference force and the influence of model uncertainty, based on the uniaxial electrohydraulic vibration table as control object, using the sliding mode control strategy, inhibition of electro-hydraulic shaking table system in the random vibration environment the influence of uncertain disturbance force, using adaptive inverse controller to compensate the model uncertainty problem, realize vibration acceleration random vibration control. The random vibration simulation analysis of the composite control strategy was carried out by MATLAB/Simulink to verify the effectiveness of the control strategy.更多还原