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Noise Induced Loss of Tracking in Systems With Saturating Actuators and Antiwindup
- Noise Induced Loss of Tracking in Systems With Saturating Actuators and Antiwindup
- Eun, Yongsoon; Hamby, Eric S.
- DGIST Authors
- Eun, Yongsoon
- Issue Date
- Journal of Dynamic Systems, Measurement and Control, Transactions of the ASME, 136(5)
- Article Type
- Engineering; Feedback Systems; Mathematical Models; Measurement Noise; Proportional-Integral Control; Saturating Actuator; Standard Errors; Steady State Errors; Stochastic Averaging; Stochastic Systems; Technical Notes
- This technical note is devoted to a recently discovered phenomenon that takes place in feedback systems with saturating actuators, proportional-integral (PI) control, and antiwindup. Namely, in such systems, measurement noise induces steady-state error in step tracking, which is incompatible with the standard error coefficients. We quantify this phenomenon using stochastic averaging theory and show that the noise induced loss of tracking occurs only if antiwindup is present. An indicator that predicts this phenomenon is derived, and a rule-of-thumb, based on this indicator, is formulated. An illustration using a digital printing device is provided. © 2014 by ASME.
- Related Researcher
Eun, Yong Soon
DSC Lab(Dynamic Systems and Control Laboratory)
Resilient control systems; Control systems with nonlinear sensors and actuators; Quasi-linear control systems; Intelligent transportation systems; Networked control systems
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