Wind_Energy_Essentials_Lecture 8

G hills and wind imprecise models for complex effects

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Unformatted text preview: ics – Uncertain mass, e.g. different #’s of passengers – Varying environment conditions, e.g. hills and wind – Imprecise models for complex effects, e.g. engine dynamics and tire forces. Slope of Road / Uncertain Mass Desired Velocity Controller Throttle Command Velocity Car 6 11/9/2010 Closed Loop • Closed Loop: Update the throttle command based on a measurement of the current vehicle speed. • Feedback is the basic principle used to control the system despite our incomplete knowledge. • The use of feedback involves tradeoffs – Stability, robustness, noise rejection Slope of Road / Uncertain Mass Desired Velocity Error Controller Throttle Command Velocity Car Feedback Path Cruise Control Block Diagram Slope of Road / Uncertain Mass Desired Velocity Error Throttle Cmd. Controller Actuator Car Sensor Measured Velocity 7 11/9/2010 Reference Command Slope of Road / Uncertain Mass Desired Velocity Throttle Error Cmd. Controller Actuator Car Sensor Measured Velocity The reference (desired velocity) is the desired condition for the system. Embedded Processor Slope of Road / Uncertain Mass Desired Velocity Error Throttle Cmd. Controller Actuator Car Sensor Measured Velocity The algorithm computations are are done on an embedded processor. 8 11/9/2010 Plant Slope of Road / Uncertain Mass Desired Velocity Throttle Error Cmd. Controller Actuator Car Sensor Measured Velocity The plant (car) is the system being controlled. Actuator Slope of Road / Uncertain Mass Desired Velocity Error Throttle Cmd. Controller Actuator Car Sensor Measured Velocity The actuator (throttle motor) is a device used to control the plant. 9 11/9/2010 Sensor Slope of Road / Uncertain Mass Desired Velocity Throttle Error Cmd. Controller Actuator Car Sensor Measured Velocity The sensor (wheel speed sensor) is a device used to measure the behavior of the plant. Uncertainties/Disturbances Slope of Road / Uncertain Mass Desired Velocity Error Throttle Cmd. Controller Actuator Car Sensor Measured Velocity 10 11/9/2...
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This note was uploaded on 02/26/2011 for the course EE 523 taught by Professor Dr.hopkins during the Spring '11 term at SUNY Buffalo.

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