Chapter 8 Tracking theory
8.1 Tracking generally
The purpose of control of a dynamic system called object or plant is to force the plant to behave sufficiently closely to (to follow sufficiently precisely, to track sufficiently accurately) its desired output behavior over some, usually prespecified, time interval and under real (usually unpredictable and unknown) both external (input) actions and initial conditions [216, pp. 121-127].
The very, the primary, goal of control is to assure that the controlled plant exhibits a requested kind of output tracking that we will call, for short, tracking in this special sense. However, the term tracking in the wide sense concerns all kinds of the plant real output vector following its desired output vector. ...
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