Discrete Observer Design for Systems with Unknown Exogenous Inputs

Gleason, Daniel; Andrisani, Dominick

doi:10.23919/acc.1989.4790383

Cited by 1 publication

(2 citation statements)

References 6 publications

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“…There are several methods for estimating the unknown deterministic input added to the plant [5,16,23]. As shown by [23], a system has a stable left inverse system if and only if its transfer matrix is full column rank and the system contains no unstable zeros.…”

Section: The Design Of the Extended Uio For Disturbance Estimationmentioning

confidence: 99%

“…It has also been proven that only systems of the triple (C, A, E) without unstable transmission zeros in the region outside the unit circle of the complex plane will have stable UIOs [2]. Therefore, considering the 1-delay inverse system [5,16], and following the general-structured UIO design, we can derive an extended UIO design which estimates both system states and unknown inputs as follows: Theorem 2. The extended UIO represented by the equations…”

Section: The Design Of the Extended Uio For Disturbance Estimationmentioning

confidence: 99%

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Design of an Optimal Unknown Input Observer for Load Compensation in Motion Systems

Hsu

Houng

Yeh

2001

Asian Journal of Control

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Recently, several model-based control designs have been proposed for motion systems and computerized numerical control (CNC) machines to improve motion accuracy. However, in real applications, their performance is seriously degraded when significant disturbances or cutting forces are applied. In this paper, we derive straightforward design procedures for a generalstructured unknown input observer (UIO) which perfectly decouples the effect of the external disturbance from the state estimation. Furthermore, we derive the optimal UIO by minimizing the estimation errors for both the state and the disturbance via the Riccati equation. Experimental results show that the performance of all advanced motion controllers suffers when external loads are applied. By compensating for the disturbance of a servo motor using the proposed optimal-UIO, the original contouring accuracy, which is degraded by the external loading, can be successfully recovered.

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Section: The Design Of the Extended Uio For Disturbance Estimationmentioning

confidence: 99%

Section: The Design Of the Extended Uio For Disturbance Estimationmentioning

confidence: 99%

Design of an Optimal Unknown Input Observer for Load Compensation in Motion Systems

Hsu

Houng

Yeh

2001

Asian Journal of Control

View full text Add to dashboard Cite

show abstract

Discrete Observer Design for Systems with Unknown Exogenous Inputs

Cited by 1 publication

References 6 publications

Design of an Optimal Unknown Input Observer for Load Compensation in Motion Systems

Design of an Optimal Unknown Input Observer for Load Compensation in Motion Systems

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