Bias of frequency-response estimates in closed-loop systems

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Bias of frequency-response estimates in closed-loop systems

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© The Institution of Electrical Engineers
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The paper considers the bias in estimates of the frequency-response function of the forward element in linear, time-invariant feedback systems, subjected to a disturbance in the forward loop. A very simple criterion is developed which determines whether or not an estimate will be subjected to bias. This criterion is used to examine particular examples. Simulation results verify the main conclusion

Inspec keywords: linear systems; frequency response; closed loop systems

Other keywords: frequency response estimates bias; closed loop systems; disturbance; linear time invariant feedback systems

Subjects: Control system analysis and synthesis methods

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      • Davall, P.W.: `Applications of statistics in the spectral analysis of time-varying systems', 1975, Ph.D. thesis, University of Warwick.
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