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		摩擦与滚阻对被动行走器步态影响的研究 1)
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			STUDY ON THE INFLUENCE OF FRICTION AND ROLLING RESISTANCE ON THE GAIT OF PASSIVE DYNAMIC WALKER 1)
			 
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		 图7. 动摩擦系数$\mu $导致的倍周期分岔现象  | 
	
Fig. 7. Period-doubling bifurcation caused by the dynamic friction coefficient $\mu $  | 
	
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