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		自抗扰控制框架下的摩擦力振动分析 1)
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			ANALYSIS OF FRICTION INDUCED VIBRATION UNDER THE ACTIVE DISTURBANCE REJECTION CONTROL FRAMEWORK 1)
			 
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		 图 7. $\beta=0.9, 2$时切换模型系统的角度极限环  | 
	
Fig. 7. Angular position limit cycle for the switch model system with $\beta=0.9, 2$  | 
	
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