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A practical method to deal with constraints

A practical method to deal with constraints

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This chapter presents the main ideas of the book to deal with constraints in feed back control systems. The proposed method aims at preserving the simplicity of conventional anti-windup (AW) algorithms, but at the same time it is supported by a solid theoretical background and exhibits distinctive robustness features. Among them, the method does not require an exact model of the plant (it only needs knowledge of the model structure), it can be employed to address constraints in non-linear processes and it can transparently deal with a wide variety of non linearities apart from amplitude saturation, such as rate limiter, asymmetry, dead zone, and time dependency. For the sake of simplicity, only single-input single output (SISO) systems are considered in this chapter.

Inspec keywords: control nonlinearities; feedback; control system analysis; robust control; constraint theory

Other keywords: feedback control systems; single input single output systems; constraints; amplitude saturation; time dependency; dead zone; rate limiter; plant model; nonlinearities; robustness features; conventional anti windup algorithms

Subjects: Control system analysis and synthesis methods

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