Automatic design theory and realization of kinematic schemes for mechanism system

Based on the analysis of mechanism combination methods of current mechanism system kinematic scheme, the input/output kinematic behavior and their constraint relations were proposed to represent the kinematic behavior knowledge of mechanism system. And the tree structure of the kinematic behavior decomposition process for mechanism system was provided. Considering the characteristics of multiple outputs for mechanism system, the matching algorithm and the attributes propagation method of kinematic behaviors were used to generate a mechanism combination scheme. Its intermediated design solution and constraint relations between input and output are generated to fill the common blackboard. Moreover, using the information in the blackboard as an input motion, the behaviors attributes of other process actions are propagated to the attribute items of the blackboard, which finally enables the computer-aided automatic design process of mechanism system kinematic scheme. In order to avoid the problem of schemes combination explosion caused by unbounded depth in the searching process, a depth bound of bounded depth-first search strategy was used to control the number of expanded hiberarchy for the design tree. Finally, an example was given to show its feasibility and solution efficiency.