Numerical Detection of Inactive Joints

Conference paper

DOI: 10.1007/978-3-319-07058-2_19

Part of the Mechanisms and Machine Science book series (Mechan. Machine Science, volume 22)
Cite this paper as:
Wojtyra M. (2014) Numerical Detection of Inactive Joints. In: Ceccarelli M., Glazunov V. (eds) Advances on Theory and Practice of Robots and Manipulators. Mechanisms and Machine Science, vol 22. Springer, Cham


Inactive joints are the joints that cannot perform relative motion due to structural limitations in a mechanism. They are usually introduced in order to eliminate redundant constraints. A joint can be inactive in the whole range of the mechanism motion or only in selected configurations. A numerical method of detection of inactive joints is presented. The method is based on multibody system approach and utilizes the constraint Jacobian matrix. The ability to perform relative motion is investigated and inactivity of joints in both regular and singular configurations is discussed. A numerical example is provided.


Inactive joints Redundant constraints Jacobian matrix 

Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  1. 1.Institute of Aeronautics and Applied MechanicsWarsaw University of TechnologyWarsawPoland

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