a probable human motor control strategy

[Eric Ronco]

Dear connexionnists,

This is to let you know of the existance of a new technical report in
the on-line data base of sydney univesrity:


http://merlot.ee.usyd.edu.au/tech_rep


TITLE: Open-Loop Intermittent Feedback Optimal Control: a probable
human motor control strategy

Authors: Eric Ronco

Keywords: Human motor control; Predictive control; Intermittent control; Open-loop control

Abstract:

Recent studies on human motor control have been largely influenced
by two important statements: (1) Sensory feedback is too slow to be
involved at least in fast motor control actions; (2) Learned
internal model of the systems plays an important role in motor
control. As a result, the human motor control system is often
described as open-loop and particularly as a system inverse. System
inverse control is limited by too many problems to be a plausible
candidate. Instead, an alternative between open-loop and feedback
control is proposed here: the "open-loop intermittent feedback
optimal control". In this scheme, a prediction of the future
behaviour of the system, that requires feedback information and a
system model, is used to determine a sequence of actions which is
run open-loop. The prediction of a new control sequence is performed
intermittently (due to computational demand and slow sensory
feedback) but with a sufficient frequency to ensure small control
errors. The inverted pendulum on a cart is used to illustrate the
viability of this scheme.


bye

Eric
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Eric Ronco, PhD                    Tel: +61 2 9351 7680
Dt of Electrical Engineering       Fax: +61 2 9351 5132
Bldg J13, Sydney University        Email: ericr at ee.usyd.edu.au
NSW 2006, Australia                http://www.ee.usyd.edu.au/~ericr
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