Finally, by using the concept and method of the Lyapunov function, a sufficient condition for the approximate stability in the large field of the closed-loop control system is derived.
最后，利用李雅普诺夫函数概念和方法得到了闭环控制系统具有大域渐近稳定性的充分条件。
The simulation results show that the closed-loop system has the ability to attenuate the disturbance using the controller and can resume stable state rapidly when large disturbances happen.
仿真结果表明在该控制器作用下，闭环系统能很好地抑制干扰，特别在大干扰条件下能很快恢复稳定。
Wastewater is cycled in a closed loop. Pollution due to wastewater discharge is eliminated thoroughly. Valuable components are recovered form the wastewater, besides, a large amount of water is saved.
污水封闭循环利用不外排放，彻底根除污水排放造成的污染，同时回收了污水中的有效成分，又节约大量工业用水。
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