NDLI: Limitations on maximal tracking accuracy. I. Tracking step signals

Content Provider	IEEE Xplore Digital Library
Author	Jie Chen Li Qiu Toker, O.
Copyright Year	1996
Description	Author affiliation: Coll. of Eng., California Univ., Riverside, CA, USA (Jie Chen)
Abstract	Studies optimal tracking performance issues pertaining to finite dimensional, linear, time invariant feedback control systems. The problem under consideration amounts to determining the minimal tracking error between the output and input signals of a system, attainable by all possible stabilizing compensators. An integral square error criterion is used as a measure for the tracking error, and explicit expressions are derived for this measure with respect to step signals. It is shown that plant nonminimum phase zeros have a negative effect upon a system's ability in reducing the tracking error, and that in a multivariable system this effect results in a way depending upon not only the zero locations, but also the zero directions. It is also shown that plant nonminimum phase zeros and unstable poles can together play a particularly detrimental role to tracking performance, especially when the zeros and poles are nearby and their directions are closely aligned. These results lead to new insights into the optimal tracking problem, and more generally, insights into certain fundamental issues concerning limitations on performance achievable via feedback control.
Starting Page	726
Ending Page	731
File Size	701883
Page Count	6
File Format	PDF
ISBN	0780335902
ISSN	01912216
DOI	10.1109/CDC.1996.574438
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-12-13
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Feedback control Control systems Poles and zeros Steady-state Error correction Optimal control MIMO Transient analysis Educational institutions Servomechanisms
Content Type	Text
Resource Type	Article

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