Abstract
The key to improve the properties and intelligent controlling level of a machine was to optimize the mechanical properties of the major mechanisms, while the core problems were how to evaluate the mechanical properties reasonably and how to control the machine fine. Due to the complexity and diversity, the single performance indexes of closed-chain mechanism were analyzed based on principal component analysis (PCA) method. Then the comprehensive performance evaluation index of the mechanism was integrated. A comprehensive performance index of crank-rocker mechanism which was a kind of typical closed-chain mechanism was proposed, and evaluation method was studied. And scientific research basis for the mechanism synthesis and optimum order was provided by the principal component score.
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