4-POSITION SYNTHESIS FOR SPATIAL MECHANISMS WITH 2 INDEPENDENT LOOPS

During the practical implementation of four-position guidance synthesi s for the spatial mechanisms, many mathematical models for rigid body guidance design are found to be too complicated to solve especially fo r up to four positions. Our objectives are to uncover simple and analy tical ways to synthesize the single degree-of-freedom, two independent loop spatial mechanisms which are capable of four precision positions . Furthermore, prescribed timing is simultaneously considered for some spatial mechanisms.