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Sensitivity analysis of the 3-PRS parallel kinematic spindle platform of a serial-parallel machine tool |
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| Authors: | Kuang-Chao Fan Hai Wang Jun-Wei Zhao Tsan-Hwei Chang |
| Affiliation: | a Department of Mechanical Engineering, National Taiwan University, 1, Sec. 4, Roosevelt Road, Taipei, Taiwan, ROC b Department of Mechanical Engineering, Ming-Chi Institute of Technology, Taipei, Taiwan, ROC c School of Mechanical Engineering, Jiao Zhou College of Engineering, Henan, China d Mechanical Industry Research Laboratory, ITRI, Taichung, Taiwan, ROC |
| Abstract: | The special configuration of a serial-parallel type machine tool possesses five degrees of freedom and provides more flexibility in NC machining. The parallel spindle platform plays the key role in manipulating three directions of movement. In this study, the inverse kinematics analysis of the platform is derived first. A sensitivity model of the spindle platform subject to the structure parameters is then proposed and analyzed. All the parameters influencing the position and orientation of the spindle platform are discussed based on the sensitivity model and the simulated examples. Critical parameters to the accuracy of the cutter location can then be found, which are the slider position, the strut length, and the tool length. |
| Keywords: | Kinematic analysis Sensitivity analysis 3-PRS spindle platform Serial-parallel machine tool |
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