Repeat Problem 8.4-2 using a phase-lead controller. In part (c), the overshoot is approximately 26 percent. Problem
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Repeat Problem 8.4-2 using a phase-lead controller. In part (c), the overshoot is approximately 26 percent.
Problem 8.2-2
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Consider the system of Fig. P8.2-2 with T = 0.2. (a) Show that the pulse transfer function of the plant is given by 1 Z s(s+ 1). G(z) T = z 1 = (b) The frequency response for G(z) is given in Table P8.2-2. From this frequency response, sketch the Bode and the Nyquist diagrams for the uncompensated system, indicating the gain and phase margins. (c) Calculate the value of G(jo) as w. It is not necessary to find G(w) to calculate this value. (d) Use the results of part (b) to estimate the overshoot in the unit-step response. (e) Based on the results in part (d), are the zeros of the uncompensated system characteristic equation real or complex? Why? (f) Use MATLAB to find the rise time t,. The step response will show a 21 percent overshoot. D(z) 0.01873z + 0.01752 (z - 1)(z-0.8187) 1-E-Ts S m(t) 1 s(s+1) C(s)
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Related Book For
Digital Control System Analysis And Design
ISBN: 9780132938310
4th Edition
Authors: Charles Phillips, H. Nagle, Aranya Chakrabortty
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