【摘要】 针对采用超声电机作动器来实现含控制面的翼段颤振主动抑制,通过分析计算与实验相结合的方法,建立了考虑沉浮、俯仰方向阻尼不确定性和作动器模型误差的控制系统模型,设计了H∞控制器。对控制过程进行数值仿真之后,通过风洞实验对控制器的实际控制效果进行了验证。结果表明,H∞控制器可有效地抑制颤振的发生,将颤振临界速度提高了23.4%,远远优于次最优控制。更多还原

【Abstract】 This paper presents how to use the ultrasonic motor as an actuator in the robust control of the flutter of a two-dimensional airfoil section with control surface.The study begins with the combined theoretical and experimental modeling for the aeroservoelastic system with damping uncertainty in plunge and pitch directions and the modeling error of ultrasonic motor taken into consideration.Then,it focuses on the design of a controller using H_∞ synthesis.The numerical simulations and wind tunnel tests show that the H_∞ controller is able to suppress the flutter effectively and the critical flutter speed of controlled system is increased by 23.4%.更多还原