平面机构中的过约束

过约束广泛存在于各种平面机构中,并对机械系统性能造成了一系列有害影响;另一方面,在许多情况下,过约束及过约束结构也常常是机构及机械系统正常工作的必然的客观需要.对平面机构中过约束产生的机理进行了详细的分析研究,在此基础上系统地将其分为运动副元素上的过约束,重复运动副结构中的过约束和封闭运动链中的过约束,并分析了过约束对机械系统性能产生的影响.同时,提出了一些消除或减小过约束有害影响的措施.

Overconstraints in the planar mechanism

Overconstraints exist widely in all kinds of planar mechanisms and result in a series of detrimental influences on the behavior of mechanical systems. On the other hand, Overconstraints and the overconstraint structures are usually the objective requirement of some machines in many cases. In this paper, authors research thoroughly on the causation of Overconstraints in planar mechanisms, classify Overconstraints into the overconstraint on kinematic pair elements, the overconstraint in combination kinematic pairs and the overconstraint in closed kinematic chain, analyze their influences on the behavior of mechanical systems, at the same time, put forward some measures to eliminate or decrease detrimental influences.