中文摘要：

直升机结构响应自适应主动控制算法因其适应能力强、重量轻、频带范围宽，效率高且控制效果好在直升机振动抑制中得到广泛应用。从作动器控制输入到目标减振点响应输出之间的次级通道传递函数的辨识精度严重影响系统稳定性，在线辨识能够适应直升机飞行高度、速度、环境、温度及压力等的改变给次级通道带来的影响。通过3种次级通道在线辨识算法控制效果仿真对比，从抗干扰性和收敛速度的角度，分析了现有自适应滤波算法，为直升机减振主动控制算法的设计提供参考。

英文摘要：

Adaptive active control of structure response has been widely used in helicopter vibration control, because of good adaption, light weight, broad frequency band, efifcient and better control result. The identiifcation accuracy of secondary path, which denotes the transfer function from input of actuator to output of objective vibration reduction, has a signiifcant impact on system stability. Online secondary path modeling has the superiority which can track the change of lfight status including height, speed, environment, temperature and pressure. Comparison of the simulation results ilustrateed the advantages and disadvantages of three online secondary path modeling methods. Analyzed the adaptive iflter algorithm from the anti-interference and convergence point of view, and provided reference for helicopter vibration active control algorithm.