Pre‐filter design for tracking error specifications in QFT

Boje, Edward

doi:10.1002/rnc.829

Cited by 21 publications

(43 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The intersection of the regions provides an exact bound for the design of a filter. Q i (s) should be designed to lie within the provided bounds at each frequency [25,26].…”

Section: Design Bounds For Shapingmentioning

confidence: 99%

“…This procedure explicitly captures phase information and can, hence, be applied to both minimum and non-minimum phase plants as well as time-delay systems, [25,27].…”

Section: Remarkmentioning

confidence: 99%

“…8 shows bode magnitude plots of (23) and modified residual reference model (25) as well as the range of frequencies which are dedicated for disturbance decoupling and actuator FD. An error magnitude of 0.1 between the actual and reference residual models can be allowed by setting Fig.…”

Section: Loop-shaping Design Procedure: By Usingmentioning

confidence: 99%

See 2 more Smart Citations

Robust fault detection and isolation technique for single-input/single-output closed-loop control systems that exhibit actuator and sensor faults

Alavi

Izadi‐Zamanabadi

Hayes

2008

IET Control Theory &Amp; Applications

View full text Add to dashboard Cite

Document VersionPublisher's PDF, also known as Version of record Link to publication from Aalborg University Citation for published version (APA):Izadi-Zamanabadi, R., Alavi, S. M. M., & Hayes, M. J. (2008). Robust fault detection and isolation technique for single-input/single-output closed-loop control systems that exhibit actuator and sensor faults. IET Control Theory and Applications, 2(11), 951-965. https://doi.org/10.1049/iet-cta:20070382 General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.? Users may download and print one copy of any publication from the public portal for the purpose of private study or research. ? You may not further distribute the material or use it for any profit-making activity or commercial gain ? You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us at vbn@aub.aau.dk providing details, and we will remove access to the work immediately and investigate your claim. Abstract: An integrated quantitative feedback design and frequency-based fault detection and isolation (FDI) approach is presented for single-input/single-output systems. A novel design methodology, based on shaping the system frequency response, is proposed to generate an appropriate residual signal that is sensitive to actuator and sensor faults in the presence of model uncertainty and exogenous unknown (unmeasured) disturbances. The key features of this technique are: (1) the uncertain phase information is fully addressed by the design equations, resulting in a minimally conservative over-design and (2) a graphical environment is provided for the design of fault detection (FD) filter, which is intuitively appealing from an engineering perspective. The FD filter can easily be obtained by manually shaping the frequency response into the complex plane. The question of interaction between actuator and sensor fault residuals is also considered. It is discussed how the actuator and sensor faults are distinguished from each other by appropriately defining FDI threshold values. The efficiency of the proposed method is demonstrated on a single machine infinite bus power system wherein a stabilised coordinate power system incorporating a robust FDI capability is achieved.

show abstract

“…The intersection of the regions provides an exact bound for the design of a filter. Q i (s) should be designed to lie within the provided bounds at each frequency [25,26].…”

Section: Design Bounds For Shapingmentioning

confidence: 99%

“…This procedure explicitly captures phase information and can, hence, be applied to both minimum and non-minimum phase plants as well as time-delay systems, [25,27].…”

Section: Remarkmentioning

confidence: 99%

See 1 more Smart Citation

Robust fault detection and isolation technique for single-input/single-output closed-loop control systems that exhibit actuator and sensor faults

Alavi

Izadi‐Zamanabadi

Hayes

2008

IET Control Theory &Amp; Applications

View full text Add to dashboard Cite

show abstract

“…In most QFT problems the desired specifications are assumed to be only on the magnitude of the closed loop transfer functions termed as conventional approaches in this paper. These specifications put the responses of the controlled system between two lower and upper bounds, [5]- [7]. The pre-filter is simply designed in the conventional QFT approach, particularly when the MATLABR QFT-Toolbox, [6] A fewer works employ tracking error specifications as desired specifications, [1]- [2], [4]- [5] and [8].…”

Section: Introductionmentioning

confidence: 99%

“…These specifications put the responses of the controlled system between two lower and upper bounds, [5]- [7]. The pre-filter is simply designed in the conventional QFT approach, particularly when the MATLABR QFT-Toolbox, [6] A fewer works employ tracking error specifications as desired specifications, [1]- [2], [4]- [5] and [8]. Constraining the magnitude of the difference between the closed loop transfer function and reference model to lie within a disk can make a better engineering sense, [4].…”

Section: Introductionmentioning

confidence: 99%

Pre-Filter Design for Tracking Error Specifications in MIMO-QFT

Alavi

Sedigh²,

Labibi³

Proceedings of the 44th IEEE Conference on Decision and Control

View full text Add to dashboard Cite

This paper presents a novel approach to solve the MIMO-QFT problem for tracking error specification through a method of obtaining exact bounds for the design of individual elements of pre-filter. The paper specifically deals with the appropriate transformation of the MIMO system to the equivalent SISO problems, which allows easy design to find the feedback compensator and pre-filter. A linearized model of quadruple-tank process is used to show the effectiveness of the proposed method.

show abstract

Improvements on the computation of boundaries in QFT

Moreno

Baños

Berenguel

2006

Int. J. Robust Nonlinear Control

View full text Add to dashboard Cite

Quantitative feedback theory (QFT) is an engineering design technique of uncertain feedback systems that uses frequency domain specifications. A key step in QFT is the mapping of these specifications into regions of the Nichols plane, whose borders are usually referred to as boundaries. Boundaries computation is a key design step, thus a precise and efficient computation is critical for both obtaining low bandwidth feedback compensators and simplification of the design process. In this work, the problem of boundaries computation is analysed, introducing a new algorithm based on the computation of level curves of a threedimensional surface. Besides magnitude boundaries, associated with some specification over the magnitude of a closed-loop transfer function, phase boundaries are also considered. In addition, comparison with previous published algorithms is done in terms of precision and computational efficiency.

show abstract

Pre‐filter design for tracking error specifications in QFT

Cited by 21 publications

References 9 publications

Robust fault detection and isolation technique for single-input/single-output closed-loop control systems that exhibit actuator and sensor faults

Robust fault detection and isolation technique for single-input/single-output closed-loop control systems that exhibit actuator and sensor faults

Pre-Filter Design for Tracking Error Specifications in MIMO-QFT

Improvements on the computation of boundaries in QFT

Contact Info

Product

Resources

About