DESIGN EVALUATIONParallel manipulators are composed of multiple closed kinematic chains. These kinematic chains are formed by two or more kinematic loops that connect the MP with the BP, where one joint in the chain is actuated and the other joints are passive. This kinematic structure allows the parallel manipulators to be driven by the actuators, positioned on or near the base ofthe manipulator.Three degrees of freedom parallel manipulator with three identical links is developed. In this manipulator, the three links makes it possible of reduced the link interference and enlarge the workspace.In the 3-PRR parallel manipulator, identical links are selected for the following reasons, The difficulty of the singularity analysis is increased with the increasing number of links / legs involved in the desired mechanism. It also affects the workspace of the manipulator. The identical legs are beneficial to the design and control of the manipulator. Hence, less number of links lead to less number of singularities and an eventually distribution of the workspace.
đang được dịch, vui lòng đợi..