Abstract：Using digital control technology in active magnetic bearing(AMB) system has many advantages, but the time delay in digital controller can seriously affect the quality of the control system, and even lead to the failure of the controller. On the basis of the research on the component of the time delay and its effect on the control system, an compensatory algorithm for the time delay is given in this paper. This algorithm removes the time delay effect by means of predicting the output of system in the next sampling point. The prediction algorithm is deduced from the discrete model of the magnetic bearing and is corrected using neural network. Experimental results show that this algorithm can compensate the time delay very well. Steady suspensional and rotation of the AMB are fulfilled after using digital control system with this algorithm.
李德广, 刘淑琴. 磁悬浮轴承数字控制的稳定性分析及预补偿算法[J]. 电工技术学报, 2011, 26(6): 108-112.
Li Deguang, Liu Shuqin. Stability Analysis of the AMB Digital Control System and Its Prediction Compensatory Algorithm. Transactions of China Electrotechnical Society, 2011, 26(6): 108-112.
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2011, Vol. 26 
