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Efficient mapping algorithms for scheduling robot inverse dynamics computation on a multiprocessor system

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2 Author(s)
Lee, C.S.G. ; Sch. of Electr. Eng., Purdue Univ., West Lafayette, IN, USA ; Chun Chen

Two efficient mapping algorithms are presented for scheduling the execution of a robot inverse dynamics computation using a p-processor multiprocessor system where p is the number of identical processors. An objective function is defined in terms of the sum of the processor finishing time and the interprocessor communication time. A minimax optimization is performed on the objective function to obtain the best mapping. This mapping problem is formulated as a combination of a graph partitioning and scheduling problem; both are known to be NP-complete. Computer simulations were performed to evaluate and verify the performance and the validity of the proposed mapping algorithms. Experiments for computing the inverse dynamics of a six-jointed PUMA-like manipulator based on the Newton-Euler dynamic equations were implemented on an NCUBE/ten hypercube computer to verify the proposed mapping algorithms

Published in:

Systems, Man and Cybernetics, IEEE Transactions on  (Volume:20 ,  Issue: 3 )

Date of Publication:

May/Jun 1990

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