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Abstract: The 4TPS-PS parallel platform designed for a stabilization and automatic tracking system is a novel lower-mobility parallel mechanism. In the first part of this paper, the structure of the platform is described and the kinematics model is built. The workspace of the platform is defined as the full reachable rotation workspace when the Z coordinate dimension of the upper plate varies continuously. A fast searching method of the full reachable workspace is presented, after which the inverse kinematics of the platform is deduced. The forward and inverse solutions of the speed and force of the platform are deduced. According to the characteristic of the 4TPS-PS platform’s structure, a fast searching algorithm of the maximum generalized speed and maximum generalized force output by the upper plate is put forward based on the forward and inverse solutions of the platform’s speed and force. The 4TPS-PS platform prototype built by the State Key Laboratory of Fluid Power Transmission and Control of China is taken as the research subject. The full reachable rotation workspace of the prototype is computed out and analyzed. The curves of maximum generalized speed and maximum generalized force of the prototype are computed out and plotted. Finally, the computing and analyzing results of the operating characteristics are confirmed through the experiment.

[1] Bonev, I., 2003. The True Origins of Parallel Robots. Http://www.parallemic.org/

[2] Cheng, J., Wang, X.Y., Li, Q., Tong, N.J., 2006. Dimensional Synthesis of 4TPS-1PS Parallel Platform Using Genetic Algorithms. Proceedings of the 7th International Conference on Frontiers of Design and Manufacturing. Sydney, Australia, p.443-446.

[3] Dasgupta, B., Mruthyunjaya, T.S., 2000. The Stewart platform manipulator: A review. Mechanism and Machine Theory, 35(1):15-40.

[4] Gao, F., Li, W.M., Zhao, X.C., Jin, Z.L., Zhao, H., 2002. New kinematic structures for 2-, 3-, 4-, and 5-DOF parallel manipulator designs. Mechanism and Machine Theory, 37(11):1395-1411.

[5] Gosselin, C., 1990. Determination of the workspace of 6-DOF parallel manipulators. Journal of Mechanisms, Transmissions, and Automation in Design, 112(3):331-336.

[6] Huang, Z., Li, Q.C., 2003. Structure synthesis theories of the lower-mobility parallel robot mechanism. Journal of Chinese Science (E Edition), 33(9):813-819 (in Chinese).

[7] Huang, Z., Kong, L.F., Fang, Y.H., 1997. Theory and Control of Parallel Robot Mechanism. China Mechanical Industry Publishing Company, Beijing, p.19, 207-225 (in Chinese).

[8] Joshi, S., Tsai, L.W., 2003. A comparison study of two 3-DOF parallel manipulators: One with three and the other with four supporting legs. IEEE Transactions on Robotics and Automation, 19(2):200-209.

[9] Li, M., Huang, T., Zhang, D.W., Zhao, X.M., Hu, S.J., Chetwynd, D.G., 2005. Conceptual design and dimensional synthesis of a reconfigurable hybrid robot. Journal of Manufacturing Science and Engineering, 127(3):647-653.

[10] Liu, X.J., Wang, J.S., Pritschow, G., 2005. A new family of spatical 3-DOF fully-parallel manipulators with high rotational capability. Mechanism and Machine Theory, 40(4):475-494.

[11] Peng, B.B., Gao, F., 2006. Input/output velocity and force of five axes parallel machine tool. Chinese Journal of Mechanical Engineering, 42(9):160-163 (in Chinese).

[12] Shen, H.P., Yang, T.L., Tao, S.L., Liu, A.X., Ma, L.Z., 2005. Structure and displacement analysis of a novel three-translation parallel mechanism. Mechanism and Machine Theory, 40:1181-1194.

[13] Tsai, K.J., Lin, J.C., 2006. Determining the compatible orientation workspace of Stewart-Gough parallel manipulators. Mechanism and Machine Theory, 41(10):1168-1184.

[14] Wang, Z., Wang, Z.X., Liu, W.T., Lei, Y.C., 2001. A study on workspace, boundary workspace analysis and workpiece positioning for parallel machine tools. Mechanism and Machine Theory, 36(5):605-622.

[15] Zhang, D., Gosselin, C.M., 2002. Kinetostatic analysis and design optimization of the tricept machine tool family. Journal of Manufacturing Science and Engineering, 124(3):725-733.