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By International Federation of Automatic Control, Heinz Unbehauen

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Extra resources for Adaptive Control of Chemical Processes 1985

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10 shows a servo experiment, in which 9. REFERENCES Hal lager, L. B. (1981). Experimental investigation of self tuning control of a gas phase fixed bed catalytic reactor with multiple inputs. Paper No. 2 at 8'th IFAC World Congress, Kyoto, Japan. Hal lager, L. and Jorgensen (1983). Adaptive control of Chemical Engineering Processes. IFAC Workshop on Adaptive Control, San Francisco, June 20-22. B. (1984). Multivariable adaptive identification and control of a distributed chemical reactor. Large Scale systems, ^, 323-336.

This indicates that one concentration measurement would suffice, and the inlet concentration was chosen as one of the measurements. This has the additional advantage that integral action could be used, if the goal were to keep the inlet concentration constant. It seems advisable to include one temperature measurement as close to the inlet of the reactor as possible, for the early detection of temperature disturbances comming from the upstream gas. Thus, the inlet temperature is a firm candidate to be included in the measurement set.

These specifications are inferred from basic chemical engineering knowledge of the process and from open loop responses. The parameters of the selected model structure are estimated on line and used to calculate the control gains. Experimental results demonstrate that MIMOCS accomplishes satisfactory and robust control of the highly sensitive recycle reactor. Keywords. Adaptive control, identification, optimal control, chemical reactor, fixed bed reactor, recycle reactor. 1. INTRODUCTION A general outline on how to choose the set of measurements and the sampling interval.

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