Robust Multivariable Controllers for a Tubular Ammonia Reactor

[+] Author and Article Information
N. Viswanadham, L. M. Patnaik, I. G. Sarma

School of Automation, Indian Institute of Science, Bangalore-560012, India

J. Dyn. Sys., Meas., Control 101(4), 290-298 (Dec 01, 1979) (9 pages) doi:10.1115/1.3426442 History: Received July 05, 1979; Online July 13, 2010


The specific objective of this paper is to develop multivariable controllers that would achieve asymptotic regulation in the presence of parameter variations and disturbance inputs for a tubular reactor used in ammonia synthesis. A ninth order state space model with three control inputs and two disturbance inputs is generated from the nonlinear distributed model using linearization and lumping approximations. Using this model, an approach for control system design is developed keeping in view the imperfections of the model and the measurability of the state variables. Specifically, the design of feedforward and robust integral controllers using state and output feedback is considered. Also, the design of robust multiloop proportional integral controllers is presented. Finally the performance of these controllers is evaluated through simulation.

Copyright © 1979 by ASME
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