旋转机械损伤跟踪的改进相空间曲变法

对旋转机械系统损伤演化过程的实时监测和跟踪，能够有效降低设备使用风险以及减少不必要的维护成本,提高设备使用效能。基于相空间曲变理论和旋转机械运行具有周期性的特点，提出了一种改进的损伤跟踪方法，可以有效减少原相空间曲变法的计算量和跟踪误差,实现系统损伤演化过程的实时跟踪。通过数值模拟方法，以及裂纹转子实验和轴承退化实验验证了本文方法。结果表明：本文方法相比于原相空间曲变法计算时间明显减小，跟踪结果更加平滑准确，对相近的损伤状态有更好的分辨能力。
Abstract：Monitoring in real time and tracking damage evolution of rotating mechanical systems can effectively reduce their operation risk and unnecessary maintenance costs to improve equipment efficiency.Here, based on the phase space warping theory and the periodic characteristic of rotating machineries, a modified damage-tracking method was proposed to reduce computation cost and tracking error of the original phase space warping method, and realize tracking the system’s damage evolution in real time.Numerical simulations and tests of cracked rotors and bearing degradation verified the effectiveness of the proposed method.The results showed that compared to the original phase space warping method, the computation time of the proposed method obviously decreases, the tracking result is more smooth and accurate, and the proposed method has a better distinguish ability for similar damage states.