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中文摘要：
为了消除利用离散指数趋近律设计的离散变结构控制系统中存在稳态振荡现象，使系统具有良好的稳态性能，提出了一种新的趋近律，利用该趋近律设计的变结构控制器，不仅能够削弱抖振，使系统运动最终趋于原点不存在稳态振荡，而且能使系统的准滑动模态保持步步穿越切换面的基本属性，有效地改善了趋近过程，提高了控制品质．仿真结果验证了该方法的合理性与有效性．
英文摘要：
There is steady state oscillation in the discrete variable structure control system designed with discrete exponential reaching-law. Thus a new discrete reaching-law was presented to improve its reaching process. By adopting this reaching-law, the designed discrete-time variable structure control system designed by this reaching-law can weaken the chattering, push the system state approach to zero diminishingly and keep the basic property of quasi-sliding mode which can cross the switching surface step by step. This method improves the reaching process and enhances the control quality of the control system. The simulation results validate the feasibility and reasonability of this method.
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Research on the application of the improved Hilbert-Huang transform in electromagnetic radiation mea
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