feedback_control

feedback_control - Feedback Controllers 1. Introduction 2....

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Unformatted text preview: Feedback Controllers 1. Introduction 2. Basic control modes 3. Typical closed-loop responses 4. Simulink example Introduction Feedback controller Objective: maintain measured output ( y m ) at setpoint ( y sp ) by adjusting output signal ( p ) sent to process Compare measurement to setpoint to generate error signal ( e ) Operate on error signal with control algorithm to generate output signal Flow controller Control Objectives Setpoint tracking The setpoint ( y sp ) is changed and the measured output ( y m ) should follow y sp Servo problem Disturbance rejection A disturbance variable changes and y m should be maintained near y sp Regulation problem Limitations to perfect control Process dynamics deviations from setpoint cannot be corrected instantaneously Input constraints input has finite effect Stirred Tank Blending System Objective Maintain outlet composition ( x ) at setpoint by adjusting pure A flow rate ( w 2 ) x controlled output w 2 manipulated input...
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feedback_control - Feedback Controllers 1. Introduction 2....

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