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2016•IFAC-PapersOnLineOpen access

Optimal H2 - IMC based PID Controller Design for Multivariable Unstable Processes

Purushottama Rao Dasari, K. V. N. S. Raviteja, A. Seshagiri Rao

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Abstract

IMC based PID controller with lead-lag filter is designed for multivariable unstable processes. The design is based on H2 optimal closed loop transfer function for set point changes and step input disturbances. The individual controllers are designed based on the corresponding equivalent transfer function (ETF) model. Simplified decouplers are designed based on the ETF model. Two examples are considered to show the closed loop responses. The proposed method provides significantly improved closed loop performances when compared to the methods in the literature.

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What this paper is about

IMC based PID controller with lead-lag filter is designed for multivariable unstable processes. The design is based on H2 optimal closed loop transfer function for set point changes and step input disturbances. The individual controllers are designed based on the corresponding equivalent transfer function (ETF) model. Simplified decouplers are designed based on the ETF model. Two examples are considered to show the closed loop responses. The proposed method provides significantly improved closed loop performances when compared to the methods in the literature.

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Available abstract

IMC based PID controller with lead-lag filter is designed for multivariable unstable processes. The design is based on H2 optimal closed loop transfer function for set point changes and step input disturbances. The individual controllers are designed based on the corresponding equivalent transfer function (ETF) model. Simplified decouplers are designed based on the ETF model. Two examples are considered to show the closed loop responses. The proposed method provides significantly improved closed loop performances when compared to the methods in the literature.

Key concepts: Multivariable calculus, Control theory (sociology), PID controller, Transfer function, Internal model, Controller (irrigation), Closed loop, Filter (signal processing)

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