7. Table 1. Ziegler -Nichols Tuning Relation Controller Type Kc 0.5Ku 0.45KuPu/1

Question

7. Table 1. Ziegler -Nichols Tuning Relation Controller Type Kc 0.5Ku 0.45KuPu/1.2 ?? PI PID 0.6Ku Pu/2 Pu/8 Table 2. Tyreus-Luben Tuning Relation Controller Type PI PID Ke 0.31Ku ?? 2.2Pu 0.45K. 2.3Pu/2 Pu/6.3 Above are the controller parameters for Z-N and T-L methods based on continuous cycling method. Use above table to match the characteristic of the performance of Two controllers [2 marks] 1. Z-N method 2. T-L method A. Faster response B. Slower response C. Oscillatory response D. Less oscillatory response

Explanation / Answer

1. Z-N method has    A.faster response   and      C. Oscillatory response as here value of (senstivity) Kc is high as compared to T-L method. And Kc is directly proportional to oscillations.

2. T-L Method has      A. slower response as value of derivative time and integral time constant is more for T-L method and      D. Less Oscillatory response

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