Design of digital controllers for randomly disturbed systems
- 1 January 1971
- journal article
- Published by Institution of Engineering and Technology (IET) in Proceedings of the Institution of Electrical Engineers
- Vol. 118 (10) , 1503-1506
- https://doi.org/10.1049/piee.1971.0275
Abstract
The paper presents a method of designing digital controllers for randomly disturbed single-input/single-output linear systems with time delay which minimise the cost function E{y2t+k+λu2t}. The process and noise models used are those obtained from current identification programs, and the control law developed has significant advantages over standard minimum-variance designs. (a) There is no difficulty with nonminimum-phase systems. (b) For processes with constraints on control effort, a marked improvement in the resultant output variance can be achieved. (c) There is a flexibility in the design to deal with cases where the closed-loop performance becomes unsatisfactory because of parameter drift or other causes. A typical example of the design procedure is given, and a comparison between the new control law and a minimum-variance law is made.Keywords
This publication has 1 reference indexed in Scilit:
- Numerical Identification of Linear Dynamic Systems from Normal Operating RecordsPublished by Springer Nature ,1966