Performance and robustness of lowpass filter feedback for already-established control system

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Performance and robustness of lowpass filter feedback for already-established control system

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Published

When a closed-loop control system is already established but its control performance is not satisfactory, there is a need either to change a closed-loop controller itself or to insert an additional compensator into an already-established control system in order to satisfy a desired control specification. A simple control performance improvement method is proposed by attaching only a lowpass filter feedback to the already-established closed-loop control system. The lowpass filter feedback is interpreted as an integral controller and a lead compensator. Its performance and robustness properties are discussed.

Inspec keywords: feedback; closed loop systems; low-pass filters

Other keywords: already-established control system; lowpass filter feedback; closed-loop control system; simple control performance improvement

Subjects: Filtering methods in signal processing; Signal processing theory

References

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