次级通道在线辨识的齿轮啮合振动主动控制

摘要

针对齿轮传动系统中由于啮合误差产生的周期性振动和噪声,构建在从动齿轮轴上附加压电作动器的齿轮主动结构,提出一种次级通道在线辨识的反馈FxLMS算法进行主动控制.应用C-MEX S函数在Simulink中编写了FxLMS算法模块和次级通道进行在线建模的自适应LMS算法模块,仿真算例验证了自建模块的正确性和算法的有效性.将控制算法代码下载到dSPACE中作为控制器,与内置压电作动器的齿轮主动结构组成硬件在环系统进行实验验证.结果表明,在不同啮合频率下,经过主动控制后的齿轮传动系统振动有了不同程度的减弱,在啮合频率基频处有6.9 dB的衰减.%Typical gearbox vibration contains several tonal signals mixed with a broadband noise.Based on the active structure attached with piezoelectric actuator on the gear shaft,an online secondary path identification feedback filtered-x LMS (FxLMS) algorithm was proposed to suppress the gear meshing vibration due to transmission error disturbances.A C-MEX S function was used to build a FxLMS algorithm block in Simulink,and then an online secondary path modeling method was applied to estimate the secondary path using an adaptive LMS filter.A simulation example was introduced to verify the correctness of custom modules and the validity of proposed algorithm.A gearbox test-bed was also developed with an interior piezoelectric actuator for applying control forces to the shaft.The custom FxLMS block and the online identification part were downloaded to DSpace as a controller.Experiment results show that the online secondary path modeling FxLMS controller is of effective performance.Up to 7 dB of gearbox vibration was attenuated at some fundamental gear mesh frequency.