Volume 34 Issue 02
Feb.  2008
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Yan Caixia, He Guangping, Lu Zhenet al. Force distribution of plane 2-DOF overactuated parallel manipulator with fault tolerance[J]. Journal of Beijing University of Aeronautics and Astronautics, 2008, 34(02): 244-248. (in Chinese)
Citation: Yan Caixia, He Guangping, Lu Zhenet al. Force distribution of plane 2-DOF overactuated parallel manipulator with fault tolerance[J]. Journal of Beijing University of Aeronautics and Astronautics, 2008, 34(02): 244-248. (in Chinese)

Force distribution of plane 2-DOF overactuated parallel manipulator with fault tolerance

  • Received Date: 22 Mar 2007
  • Publish Date: 29 Feb 2008
  • In order to ensure the fault tolerant capacity of manipulator under scenario the failed actuators are no more than system redundancy, the driving force distribution before and after failure was researched. Based on the D-Alembert principle and the equivalent force theory, a plane 2-DOF(degree of freedom) overactuated parallel manipulator dynamics model was built. Then, dynamics equation of manipulator with partial failure was analyzed. And fault tolerant driving force redistributing method was further deduced. To reduce the impact of active force abrupt change to end effectors before and after failure, a driving force distributing method was brought forward. It took the minimum quadratic sum of driving force difference between overactuated and faulting system as optimization objective. With data analysis, the force change ranges of traditional method and minimum difference oriented fault tolerant method were compared. The result indicates this optimized force distribute method can obviously improve fault tolerant performance.

     

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