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Unformatted text preview: ECE 147A FEEDBACK CONTROL SYSTEMS  THEORY AND DESIGN F04 Final Exam Closed book and notes. No calculators. Show all work. Name: Problem 1: /20 Problem 2: /20 Problem 3: /20 Problem 4: /20 Problem 5: /20 Total: /100 Miscellaneous: tan 1 (1 / 3) ≈ 18 degrees, tan 1 (1) = 45 degrees. tan 1 (2) ≈ 63 degrees, tan 1 (5) ≈ 78 degrees, tan 1 (10) ≈ 84 degrees, tan 1 (20) ≈ 87 degrees, sin(45 ◦ ) = √ 2 / 2 ≈ . 7, sin(50 ◦ ) ≈ . 77, sin(55 ◦ ) ≈ . 82, sin(60 ◦ ) = √ 3 / 2 ≈ . 87. Name: Problem 1 1. For the unity negative feedback configuration, describe the three properties that typically characterize a good choice for the function ω 7→  C ( ω ) P ( ω )  and explain why these three properties are important. 2. What are the typical motivations for using a pole at the origin in a feedback controller? 3. The loop gain for a given unity negative feedback system is shown as the solid curve in the figure below. (The dashed curve is a circle of radius one.) (a) Label on the plot the crossover frequency of the openloop. (b) Estimate the phase margin....
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This note was uploaded on 08/03/2010 for the course ECE PROF. VOLK taught by Professor Volkanrodoplu during the Spring '10 term at UCSB.
 Spring '10
 VolkanRodoplu

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