新型压电激励器作用力模拟技术研究

Research of the Force Simulation Technology of a New Type of Piezoelectric Exciter

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。

It is of great significance to study the flutter flight test excitation of light structures,helicopter rotor structures and composite structures.A new way that using bending moment as piezoelectric exciter force to simulate the force of piezoelectric exciter macro fiber composites(MFC)is presented,and thus the problem of MFC simulation modeling is solved.Firstly,a dynamic simulation model of wing structure with piezoelectric exciter is 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 force of nonlinear piezoelectric actuator is obtained.The magnitude of the force is verified by other ground test data.The force simulation technique is applied in different experiments.The force simulation of MFC is realized through the above research,and the force value is obtained.The results obtained in this paper can be the useful references for the subsequent experiments with the actuator as excitation actuator or control actuator.