Bristol, Edgar H. Corporate Research Department, Foxboro Company, Foxboro, Massachusetts.
- Control objectives
- General considerations
- Fundamental limitations
- Achievement of objectives
- Relative gain array
- Related Primary Literature
- Additional Reading
The control of systems characterized by multiple inputs, which are usually referred to as the controls; or by multiple outputs, which are often the measured variables and the variables to be controlled (Fig. 1); or by both multiple inputs and multiple outputs (MIMO). Automobiles, chemical processing and manufacturing plants, aircraft and aerospace vehicles, biological systems, and the national economy are examples of multivariable systems which require and receive some form of regulation or control, be it mathematically contrived or not. Control systems are based on mathematical models of the behavior to be controlled, and the methodologies rely on sound mathematical theories. This article focuses on mathematical techniques which are used to design automatic controllers for multivariable systems.
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