EEC 321 Control engineering 1 Exam 2025

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EEC 321: First Semester Exam for EEC321 Control Engineering 1, Department of Electrical and Electronic Engineering, College of Technology, University of Buea, Instructor Dr Gerard Ombick, January 2025. Exercise 1: same classic minor-loop-feedback damping-ratio problem as the companion CA paper (ID 2832 Exercise 4) -- find K for zeta=0.4 and compare transient specs before/after. Exercise 2: Routh-Hurwitz stability range of gain K for a fifth-order characteristic equation from a tape-drive transfer function. Exercise 3: for a second-order plant, comparing P/PD/PID controllers' system type and error constants for reference tracking versus disturbance rejection, and discussing which task the system is better suited to. Exercise 4: Ziegler-Nichols PID tuning (both open-loop reaction-curve and closed-loop ultimate-sensitivity methods) for a paper-machine first-order-plus-dead-time process.