次级通道在线辨识的齿轮啮合振动主动控制

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Active vibration control of gear meshing based on online secondary path identification algorithmLI]1/-nong，ZHANG Feng，WANG Lei，DING Qing-zhong(State Key Laboratory of Mechanical Transmission，Chongqing University，Chongqing 400044，China)Abstract： Typical gearbox vibration contains several tonal signals mixed with a broadband noise.Based on theactive structure attached with piezoelectric actuator on the gear shaft，an online secondary path identifcation feedbackfiltered-X LMS (FxLMS)algorithm was proposed to suppress the gear meshing vibration due to transmission erordisturbances.A C-MEX S function was used to build a FxLMS algorithm block in Simulink，and then an online secondarypath modeling method was applied to estimate the secondary path using an adaptive LMS filter.A simulation example wasintroduced to verify the correctness of custom modules and the validity of proposed algorithm.A gearbox test-bed was alsodeveloped with an interior piezoelectric actuator for applying control forces to the shaft.The custom FxLMS block and theonline identification part were downloaded to DSpace as a controler.Experiment results show that the online secondarypath modeling FxLMS controller is of effective performance. Up to 7 dB of gearbox vibration was attenuated at somefundamental gear mesh frequency。

Key words：vibration；active control；secondary path；online identifcation；FxLMS；gearing齿轮是动力传输装置最重要的部件。齿轮在进行啮合传动时，由于齿轮加工误差、啮合刚度及啮合冲击等因素的影响，将产生振动，随着齿面磨损的扩展，齿形误差、基节误差和齿侧间隙也将增加，使得齿轮振动加剧。齿轮系统的振动不但会产生噪声和导致传动系统的不稳定，而