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Process Control and Instrumentation
For the block diagram shown below : The characteristic equation is
τl S (τps + 1) + Kc . Kp (τlS + 1) e-τd s = 0
(τmS + 1) (τpS + 1) + Km . Kp e-τd S = 0
τl S(τm S + 1) (τp S + 1) +Kc . Kp . Km (τl s + 1) e-τdS = 0
(τms + 1) (τp s + 1) + Kc . Kp . Km . e-τdS = 0
Correct Answer:
τl S(τm S + 1) (τp S + 1) +Kc . Kp . Km (τl s + 1) e-τdS = 0
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