lecture7

lecture7 - MAE 171A: Dynamic Systems Control Lecture 7:...

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Unformatted text preview: MAE 171A: Dynamic Systems Control Lecture 7: Framework of Control Systems Goele Pipeleers Overview So Far: Mainly Systems Theory L1: review of the Laplace transform and transfer function L2: deriving a transfer function model from a physical model L3: system poles, zeros and impulse response L4: system step response and relation with pole locations L5: effect of zeros of system response L6: system stability In This Lecture: Framework of Control Systems 1 Two Control Strategies Recall From Lecture 1/2 feedforward control system u y feedforward y des disturbances model errors controller design : inverse of system model advantages : * simple, no need for sensors * no problems with stability disadvantages : sensitive to system variations and disturbances 2 feedback control system u y e disturbances model errors sensor y des feedback controller design : based on system model, but more involved that just inverting advantages : less sensitive to system variations and disturbances disadvantages : * more complex, sensor needed * affects stability * inherently slower (compensating instead of preventing the error) 3 combination system y disturbances model errors sensor y des feedback controller u e feedforward controller feedback control: deals with system variations and disturbances feedforward control: provides fast tracking In This Lecture formalizing these statements 4 Framework of Control Systems Control Configuration and Notation feedforward control (open-loop control) r D ( s ) G ( s ) controller system u y w : disturbance r : reference...
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This note was uploaded on 08/08/2011 for the course MAE 171 taught by Professor Pipeleers during the Summer '11 term at UCLA.

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lecture7 - MAE 171A: Dynamic Systems Control Lecture 7:...

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