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Consider the cruise-control example described by the block diagram below (where the two blocks describing the plant correspond to how the velocity responds to force, and how the applied force depends on the throttle setting). Vref F C(s) s+1 s+1 Note in sketching the root locus below that (i) you can move the poles to –1+e and –1 – €, for some small e, if you find it casier to think through the application of the rules and (ii) you do not need to compute break-out or break-in points explicitly. 1. Sketch the root-locus diagram for this system for proportional control u = kp(vref – v), assuming k, > 0. 2. Sketch the root-locus diagram if the controller is changed from C(s) = k, as above to: (s+2) C(s) = kp- 3. Which of these controllers (and why) is likely to lead to smaller settling time in response to a step change in the desired velocity vref? 4. Which will have a smaller steady-state error?

Consider the cruise-control example described by the block diagram below (where the two blocks describing the plant correspond to how the velocity responds to force, and how the applied force depends on the throttle setting). Vref F C(s) s+1 s+1 Note in sketching the root locus below that (i) you can move the poles to –1+e and –1 – €, for some small e, if you find it casier to think through the application of the rules and (ii) you do not need to compute break-out or break-in points explicitly. 1. Sketch the root-locus diagram for this system for proportional control u = kp(vref – v), assuming k, > 0. 2. Sketch the root-locus diagram if the controller is changed from C(s) = k, as above to: (s+2) C(s) = kp- 3. Which of these controllers (and why) is likely to lead to smaller settling time in response to a step change in the desired velocity vref? 4. Which will have a smaller steady-state error?

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Consider the cruise-control example described by the block diagram below (where the two blocks describing the plant correspond to how the velocity responds to force, and how the applied force depends on the throttle setting). Vref F 1 C(s) s+1 Note in sketching the root locus below that (i) you can move the poles to -1+€ and –1 – €, for some small e, if you find it easier to think through the application of the rules and (ii) you do not need to compute break-out or brecak-in points explicitly. 1. Sketch the root-locus diagram for this system for proportional control u = assuming k, > 0. kip(Vref = v), 2. Sketch the root-locus diagram if the controller is changed from C(s) = k, as above to: (s + 2) C(s) = kp- 3. Which of these controllers (and why) is likely to lead to smaller settling time in response to a step change in the desired velocity vref? 4. Which will have a smaller steady-state error?
Transcribed Image Text:Consider the cruise-control example described by the block diagram below (where the two blocks describing the plant correspond to how the velocity responds to force, and how the applied force depends on the throttle setting). Vref F 1 C(s) s+1 Note in sketching the root locus below that (i) you can move the poles to -1+€ and –1 – €, for some small e, if you find it easier to think through the application of the rules and (ii) you do not need to compute break-out or brecak-in points explicitly. 1. Sketch the root-locus diagram for this system for proportional control u = assuming k, > 0. kip(Vref = v), 2. Sketch the root-locus diagram if the controller is changed from C(s) = k, as above to: (s + 2) C(s) = kp- 3. Which of these controllers (and why) is likely to lead to smaller settling time in response to a step change in the desired velocity vref? 4. Which will have a smaller steady-state error?
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