Multivariable PID estimation and control in systems with biased disturbances

✍ Scribed by J.G. Balchen; T. Endresen; M. Fjeld; T.O. Olsen

• Publisher: Elsevier Science
• Year: 1973
• Tongue: English
• Weight: 925 KB
• Volume: 9
• Category: Article
• ISSN: 0005-1098
• DOI: 10.1016/0005-1098(73)90054-x

✦ Synopsis

A reset control action may be achieved in multivariable control systems using a state reconstructor and feedback from estimated process and environment states.

Snmmary--A solution is given to yield reset control action in multivariable control systems, where the controller consists of a state reconstructor and feedback from estimated process and environmental states. Integral action in the estimation loop follows from the assumptions about the disturbance model, and if a special choice for the "fecdforward" matrix operating on the estimated environmental states is made, integral, or reset, control action results. The classical least squares optimal control with modeling of the environment is illustrated using a linearized model of a plug flow tubular reactor as a basis for the design. As a second example which illustrates the reset control action, i.e. the tracking of a constant reference vector with zero control error, a simple third order linear system is used.