lecture2 sq key - Short Answers to Study Questions for...

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Short Answers to Study Questions for Lecture 2 1. Define: a. Feedback control system (= closed loop control system) A feedback control system is one in which the control action depends on the output. b. Negative feedback control system A negative feedback control system is one in which the controller acts to reduces the difference between the output and the set point. c. Positive feedback control system A positive feedback control system is a closed loop control system in which the control action increases the effect of any disturbance. Therefore positive feedback is information sent to the controller from the output that is used to increase the effect of disturbances, thus driving the system to an extremum. d. Feedforward (= open loop) control system A feedforward control system is one in which the controller anticipates actions of system and disturbances. Feedforward control systems and negative feedback control systems are sometimes both used to maintain homeostasis, but for a feedforward control system, the
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This note was uploaded on 02/21/2010 for the course IB 132 taught by Professor Brooks during the Spring '08 term at University of California, Berkeley.

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lecture2 sq key - Short Answers to Study Questions for...

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