This preview shows pages 1–3. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: ECE 147A FEEDBACK CONTROL SYSTEMS  THEORY AND DESIGN F98 Midterm Exam Closed book and notes. No calculators. Show all work. Name: Problem 1: /10 Problem 2: /20 Problem 3: /20 Problem 4: /15 Total: /65 Problem 1 List at least two advantages of feedback control over openloop control. Name: Problem 2 The equations of motion for a particular shunt DC motor are given by x 1 = c 1 x 1 c 2 x 1 x 2 2 + c 3 x 2 u c 6 L x 2 = c 4 x 2 + c 5 u (1) where x 1 is the angular speed of the motor, x 2 is the field current, L is the load torque and u is an input voltage. The numbers c i are positive constants. For simplicity, let c i = 1 for i = 1 , . . . , 6. 1. Find the operating condition x 2 = x 2 and u = u corresponding to a constant angular speed x 1 = 0 . 75 and a constant load torque L = 0 . 25. 2. Find the transfer function from u u to x 1 x 1 at the operating condition from part 1. You may want to use the fact that " a 1 a 2 a 3 # 1 = " 1 /a 1 a 2 / ( a 1 a 3 ) 1 /a 3 # . Name:...
View Full
Document
 Spring '10
 VolkanRodoplu

Click to edit the document details