压电舵翼动力学模型研究

为了准确地得到压电舵翼的动力学特性和动力学参数,根据压电舵翼的工作原理,分析舵翼工作时各部件的运动特性; 以振动动力学理论为基础,建立了舵翼系统的动力学模型。通过测量压电舵翼系统在阶跃信号激励下的动力学响应,验证了动力学模型的正确性。结合动力学模型和舵翼系统的动力学响应曲线,得到了压电舵翼有阻尼自振周期23 ms,阻尼比0.571 5,是一个二阶欠阻尼系统,这为舵翼系统的结构优化以及控制奠定了基础。

Study on Dynamic Model of Piezoelectric Rudder

To obtain the dynamic characteristic and dynamic parameters of piezoelectric rudder,the movement characteristic of the parts of piezoelectric rudder was analyzed,and the dynamic model of piezoelectric rudder system was developed based on the dynamic theory.The dynamic model of the piezoelectric rudder was validated by measuring the dynamic response of the rudder system excited by step signal.Combining with the dynamic model and the dynamic response of the piezoelectric rudder system,the dynamic parameters of the rudder system were obtained.The damped vibration period is 23 ms; the damping ratio is 0.571 5,which demonstrates that the rudder system is two order under damped.This conclusion provides a theoretical basis for the structure optimization and control of piezoelectric rudder system.