Synthesis of Robust PID Controller for the Pure Integral Process with Dead Time

Thirunavukkarasu, I and George, V I and Kumar, Saravana G and Shanmugapriya, S (2008) Synthesis of Robust PID Controller for the Pure Integral Process with Dead Time. In: Proceedings of Control Instrumentation System Conference, November 7-8, 2008, Manipal.

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The design of H-Infinity controller helps to satisfy the robust stability and robust performance criteria [1], sometimes the order of the H-Infinity controller will be of higher order when compared to the systems transfer function. In this paper an attempt has been made to design the low order controller design (PID Controller with H-Infinity Principles for a Pure Integrating Process with Dead Time (PIPDT)). The controller design parameters such as Proportional gain, Derivative gain and Integral gain are fixed using the principle of Hurwitz Criteria. The weighting functions of the system needs to be selected, based on the frequency requirements of the input signal and disturbance rejection. After finding the range of Derivative gain and the Integral gain, by sweeping the proportional gain we can find the various set of admissible layers of PID Controller values. Finally, the three dimensional plots of the admissible set of PID controller values for the PIPDT were shown in Figures 5 & 7. We can also use the Genetic Algorithm (GA) approach to find the more suitable probability of finding the global minimum PID values, which may also yield the better response for the PIPDT. Once we obtain the admissible set of PID controller settings, that satisfies the robust performance condition [2], it can also be easily implemented in the Industries as a lower order HInfinity controller.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Robust Performance, Robust Stability, H-inf PID Controller, Hurwitz Criteria
Subjects: Engineering > MIT Manipal > Chemical
Engineering > MIT Manipal > Instrumentation and Control
Depositing User: MIT Library
Date Deposited: 19 May 2015 07:42
Last Modified: 19 May 2015 07:42

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