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针对某卫星发射过程中所应用的适配器模型,利用4节点Mindlin板单元对其进行了有限元建模,将分布式压电作动器的影响作为动力学边界条件加入模型当中;试验数据与理论计算结果对比证明该方法能够满足精度要求,此外与通常的层合理论建模方法相比,该方法更加简洁,大大降低了计算量;利用基于独立模态空间控制的方法对锥壳结构进行了振动主动控制研究,仿真结果可以看出利用少数作动器即可达到理想的控制效果.由于控制器本身比较简单,具有很好的鲁棒性,因此对于实际工程应用具有非常重要的指导意义.
Aiming at the adapter model applied in the satellite launch process, the finite element method was used to simulate the adapter model of a satellite with Mindlin plate element, and the influence of distributed piezoelectric actuator was added into the model as the dynamic boundary condition. The experimental data and theory Comparing the result of the calculation shows that the method can meet the requirement of accuracy. In addition, compared with the usual method of laminating theory, the method is more concise and the computational cost is greatly reduced. The conical shell structure is controlled by the method based on independent modal space control The study of active vibration control shows that the ideal control effect can be achieved by using a few actuators.As the controller itself is relatively simple and has good robustness, it has very important guiding significance for the practical engineering application.