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广义分布参数系统的状态反馈稳定性问题 被引量:1
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作者 刘亚相 贾江涛 葛照强 《西北大学学报(自然科学版)》 CAS CSCD 北大核心 2003年第5期524-526,共3页
讨论了Hilbert空间中一阶广义分布参数系统的状态反馈稳定性问题。应用泛函分析及算子理论的方法给出了使闭环广义分布参数系统渐进稳定的充分条件及状态反馈的构造性表达式。
关键词 广义分布参数系统 状态反馈稳定性 算子理论
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Fuzzy robust sliding mode control of a class of uncertain systems 被引量:7
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作者 REN Li-tong 《Journal of Central South University》 SCIE EI CAS CSCD 2016年第9期2296-2304,共9页
Aiming at a class of systems under parameter perturbations and unknown external disturbances, a method of fuzzy robust sliding mode control was proposed. Firstly, an integral sliding mode surface containing state feed... Aiming at a class of systems under parameter perturbations and unknown external disturbances, a method of fuzzy robust sliding mode control was proposed. Firstly, an integral sliding mode surface containing state feedback item was designed based on robust H∞ control theory. The robust state feedback control was utilized to substitute for the equivalent control of the traditional sliding mode control. Thus the robustness of systems sliding mode motion was improved even the initial states were unknown. Furthermore, when the upper bound of disturbance was unknown, the switching control logic was difficult to design, and the drawbacks of chattering in sliding mode control should also be considered simultaneously. To solve the above-mentioned problems, the fuzzy nonlinear method was applied to approximate the switching control term. Based on the Lyapunov stability theory, the parameter adaptive law which could guarantee the system stability was devised. The proposed control strategy could reduce the system chattering effectively. And the control input would not switch sharply, which improved the practicality of the sliding mode controller. Finally, simulation was conducted on system with parameter perturbations and unknown external disturbances. The result shows that the proposed method could enhance the approaching motion performance effectively. The chattering phenomenon is weakened, and the system possesses stronger robustness against parameter perturbations and external disturbances. 展开更多
关键词 uncertain systems robust control fuzzy sliding mode control CHATTERING
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