Robust nonlinear control of pH processes
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abstract
Systems with static nonlinearities on the process output occur very frequently in the chemical industry. This paper discusses a framework for controlling these types of processes. This framework is then applied to the case of a CSTR neutralization reactor. The robust stability of the resulting framework is studied by examining the case when the static output nonlinearity changes with time and also when a disturbance occurs on the process output. The results in this work show that there is not a unique answer to the optimal choice of model in the controller for the pH system, but a good choice can be recommended.
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Proceeding of the 1996 IEEE International Conference on Control Applications IEEE International Conference on Control Applications held together with IEEE International Symposium on Intelligent Control IEEE International Symposium on Computer-Aided Contro