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Random field estimation approach to robot dynamics

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1 Author(s)
G. Rodriguez ; Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA

It is known that the difference equations of Kalman filtering and smoothing recursively factor and invert the covariance of the output of a linear state-space system driven by a white-noise process. It is shown that similar recursive techniques factor and invert the inertia matrix of a multibody robot system. The random field models are based on the assumption that all of the inertial (D'Alembert) forces in the system are represented by a spatially distributed white-noise model. They are easier to describe than the models based on classical mechanics, which typically require extensive derivation and manipulation of equations of motion for complex mechanical systems. With the spatially random models, more primitive locally specified computations result in a global collective system behavior equivalent to that obtained with the deterministic models. The primary goal in investigating robot dynamics from the point of view of random field estimation is to provide a concise analytical foundation for solving robot control and motion planning problems

Published in:

IEEE Transactions on Systems, Man, and Cybernetics  (Volume:20 ,  Issue: 5 )