新型压电激励器作用力模拟技术研究

研究轻型结构、直升机旋翼结构和复合材料结构等的颤振飞行试验激励问题具有重要意义。提出以弯矩模拟压电粗纤维复合材料(MFC)激励器的作用力,从而解决MFC仿真建模问题。首先借助机翼有限元模型,建立带有压电激励器的机翼结构动力学仿真模型;然后以压电激励器地面激励试验结果为基础,通过修正仿真模型中压电作用弯矩的大小,实现仿真试验结果与地面试验结果的拟合,最终得出非线性压电激励器作用力;最后通过另一组地面试验数据验证了该作用力的大小,并将该作用力模拟技术应用于不同试验中。本文的研究结果可为后续以该激励器作为激励作动器或控制作动器的试验提供有益参考。

Research of the force simulation technology of a new type of piezoelectric exciter

In this paper, we presented a new way that used bending moment as piezoelectric exciter force to simulate the force of new novel piezoelectric exciter Macro Fiber Composites. The simulation results and the experimental results were fitted to simulate the force of the piezoelectric exciter. It is the basis of the experimental research on the actuator as the exciter or the control actuator. Firstly, A dynamic simulation model of wing structure with piezoelectric exciter was established by means of the finite element model. Then by modifying the magnitude of the piezoelectric moment of the simulation model based on the results of the ground test of the piezoelectric exciter in order to fit the simulation results with the ground test results, and finally the nonlinear piezoelectric actuator was obtained. The magnitude of the force was verified by other ground test data. The force simulation technique is applied in different experiments. The force simulation of MFC was realized through the above research, and the force value was obtained.