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控制器作为系统的中枢部件,其动力学特性直接影响整机的性能。以某航空电动机控制器为例,利用ANSYS有限元技术对控制器进行了模态分析,根据所得模态参数,结合外界激振频率对控制器低频动态特性进行了优化。以模态分析为基础,结合控制器在实际工况下的加速度功率谱密度,对控制器进行了随机振动分析,得到控制器在固有激励下的响应特性,以验证结构强度及稳定性,调整薄弱处的刚度及质量分布,提高产品的可靠性水平。
Controller as the central part of the system, the dynamics of a direct impact on the performance of the whole machine. Taking an aeronautic motor controller as an example, the modal analysis of the controller is carried out by ANSYS finite element method. Based on the obtained modal parameters and the external excitation frequency, the low frequency dynamic performance of the controller is optimized. Based on the modal analysis, combined with the acceleration power spectral density of the controller under actual operating conditions, the controller was subjected to random vibration analysis, and the response characteristics of the controller under intrinsic excitation were obtained to verify the structural strength and stability, adjust Weaknesses Department of stiffness and mass distribution, improve product reliability level.