Abstract
A generally applicable criterion for all mechanism mobility has been an active domain in mechanism theory lasting more than 150 years. It is stated that the Modified Grübler-Kutzbach criterion for mobility has been successfully used to solve the mobility of many more kinds of mechanisms, but never before has anyone proven the applicability and generality of the Modified Grübler-Kutzbach criterion in theory. In order to fill the gap, the applicability and generality of the Modified Grübler-Kutzbach Criterion of mechanism mobility is systematically demonstrated. Firstly, the mobility research background and the Modified Grübler-Kutzbach criterion are introduced. Secondly, some new definitions, such as half local freedom, non-common constraint space of a mechanism and common motion space of a mechanism, etc, are given to demonstrate the correctness and broad applicability of the Modified Grübler-Kutzbach criterion. Thirdly, the general applicability of the Modified Grübler-Kutzbach criterion is demonstrated based on screw theory. The mobilities of the classical DELASSUS mechanisms and a modern planar parallel mechanism, are determined through the Modified Grübler-Kutzbach criterion, which are as examples to show the practical application of the Modified Grübler-Kutzbach criterion.
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This project is supported by National Natural Science Foundation of China(Grant Nos. 51175446, 50875227), and the Science Supporting Plan of Education Department of Hebei Province, China(Grant No. 2008150)
LI Yanwen, born in 1966, is currently a professor at Yanshan University, China. She received her PhD degree from Yanshan University, China, in 2005. Her research interests include mechachonics engineering, robotics.
WANG Lumin, born in 1964, is currently an associate professor at Yanshan University, China. He received his master degree from Huadong Science and Technology University, China, in 1999. His research interests include chemical science and engineering.
LIU Jingfang, born in 1985, is currently a lecturer at College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, China. She received her PhD degree from Yanshan University, China. Her research interests include theory and control in mechanisms, robotics.
HUANG Zhen, born in 1936, is currently a professor at Yanshan University, China. His research interests include theory and technology in parallel mechanisms, robotics, topological analysis as well as electromechanical integration.
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Li, Y., Wang, L., Liu, J. et al. Applicability and generality of the modified Grübler-Kutzbach criterion. Chin. J. Mech. Eng. 26, 257–263 (2013). https://doi.org/10.3901/CJME.2013.02.257
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DOI: https://doi.org/10.3901/CJME.2013.02.257