MODEL BASED CONTROL PERFORMANCE ASSESSMENT APPLIED TO LABORATORY THERMAL PLANT
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- TITLE: MODEL BASED CONTROL PERFORMANCE ASSESSMENT APPLIED TO LABORATORY THERMAL PLANT
- ABSTRACT: Fast and efficient Control Performance Assessment (CPA) presented here was performed in three steps. Model Gm(s), represent the dynamic of the process, such that the set-point and load disturbance responses of the evaluated controller in the loop with Gm(s) and with the same controller in the loop with the process analyzed are in a very good agreement. The controller in the evaluated loop, with model Gm(s), was retuned/redesigned by using the controller optimization design method based on the frequency response Gm (iω) under constraints on the desired: sensitivity to measurement noise Mn, maximum sensitivity M s and maximum complementary sensitivity Mp. Applying the unit load step disturbance, comparing the Integrated Absolute Error (IAE), the maximum deviation emax of the controlled variable, the Ms , M p and M n obtained by the evaluated controller in the loop with Gm(s), give us valuable information how far we are from an optimum solution and search new controller as the candidate for the calculation and implementation. Proposed method for CPA is illustrated by simulation of thermal plant model, with the band-limited white noise added to the controlled variable, and on a laboratory thermal plant with noise measurements.
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