|(electronics)||feedback control - A control system which monitors its effect on
the system it is controlling and modifies its output
accordingly. For example, a thermostat has two inputs: the
desired temperature and the current temperature (the latter is
the feedback). The output of the thermostat changes so as to
try to equalise the two inputs.|
Computer disk drives use feedback control to position the read/write heads accurately on a recording track. Complex systems such as the human body contain many feedback systems that interact with each other; the homeostasis mechanisms that control body temperature and acidity are good examples.