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However, kinematic redundancy introduces multiple inverse kinematics solutions, leading to uncertainty in the mechanism\u2019s motion state. Therefore, this article proposes a method to optimize the inverse kinematics solutions based on motion\/force transmission performance. By dividing the kinematically redundant PM into hierarchical levels and decomposing the redundancy, the transmission wrench screw systems of general redundant limbs and closed-loop redundant limbs are obtained. Then, input, output, and local transmission indices are calculated, respectively, to evaluate the motion\/force transmission performance of such mechanisms. To address the problem of multiple inverse kinematics solutions, the local optimal transmission index is employed as a criterion to select the optimal motion\/force transmission solution corresponding to a specific pose of the moving platform. By comparing performance atlas before and after optimization, it is demonstrated that the optimized inverse kinematics solutions enlarge the reachable workspace and significantly improve the motion\/force transmission performance of the mechanism.<\/jats:p>","DOI":"10.1017\/s0263574725102026","type":"journal-article","created":{"date-parts":[[2025,8,11]],"date-time":"2025-08-11T08:18:07Z","timestamp":1754900287000},"page":"3058-3079","source":"Crossref","is-referenced-by-count":2,"title":["Motion\/force transmissibility analysis and inverse kinematics optimization of kinematically redundant parallel mechanisms"],"prefix":"10.1017","volume":"43","author":[{"ORCID":"https:\/\/orcid.org\/0009-0006-8787-6575","authenticated-orcid":false,"given":"Licong","family":"Li","sequence":"first","affiliation":[{"name":"Zhejiang Sci-Tech University"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Haifeng","family":"Zhang","sequence":"additional","affiliation":[{"name":"Zhejiang Sci-Tech University"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiang","family":"Jin","sequence":"additional","affiliation":[{"name":"Zhejiang Sci-Tech University"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Qiaohong","family":"Chen","sequence":"additional","affiliation":[{"name":"Zhejiang Sci-Tech University"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2606-7206","authenticated-orcid":false,"given":"Wei","family":"Ye","sequence":"additional","affiliation":[{"name":"Zhejiang Sci-Tech University"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"56","published-online":{"date-parts":[[2025,8,11]]},"reference":[{"key":"S0263574725102026_ref19","doi-asserted-by":"publisher","DOI":"10.1109\/TRO.2016.2516025"},{"key":"S0263574725102026_ref7","doi-asserted-by":"publisher","DOI":"10.1016\/j.apm.2019.07.040"},{"key":"S0263574725102026_ref23","first-page":"1","article-title":"Evaluation of the maximum value of motion\/force transmission power in parallel manipulators","volume":"50","author":"Chen","year":"2014","journal-title":"J. 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