Abstract
In previous chapters it was assumed that a model of the process exists and that the designer’s task is to use that model in the creation of a feedback controlled system. In fact, although a model structure may exist, it is frequently the case that its parameters are unknown, or at least are not known to the required precision. Hence a motor model may be derivable from basic electromagnetics and physics, but the moment of inertia of a particular motor may only be approximately known; a missile’s mass may decrease linearly with burn time of the rocket motor, but the rate and initial mass may only be guaranteed to a few per cent. This may or may not be a problem — after all, the reason for using feedback control in the first place is to reduce errors due to such factors as imprecisely known parameters — but accurate estimation of the parameters is sometimes important.
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© 2001 Springer Science+Business Media New York
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Westphal, L.C. (2001). System identification. In: Handbook of Control Systems Engineering. The Springer International Series in Engineering and Computer Science, vol 635. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-1533-3_30
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DOI: https://doi.org/10.1007/978-1-4615-1533-3_30
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4613-5601-1
Online ISBN: 978-1-4615-1533-3
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