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The applications of redundant manipulator are more and more widely in the automobile manufacturing industry and aerospace fields. In this paper, the omnidirectional joint unit mechanism is improved and redundant snake-like manipulator of full range PYR series is designed. The composition, working principle, performance index and the joint improved structure of PY (PYR) singular omnidirectional joint are introduced. The formulas of improved PYR type joint also are given. The same as, two types of joint design are combined into a 11 degree of freedom 5 joint robot arm which using slider crank mechanism to solve the pitch and yaw motion coupling problem.

The pitch and yaw motion coupling research on bionic arm