A cascade structure approach to control reconfiguration

Acosta-Santana, P.; Rodriguez-Alfaro, L. H.; Alcorta-Garcia, E.

doi:10.1109/systol.2013.6693924

Cited by 7 publications

(2 citation statements)

References 8 publications

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“…The cascade control structure (Bolton, 2021) is not new in general but it has not been used intensively in fault tolerance. The cascade control structure initially described by Acosta-Santana et al (2013), formed by an inner loop (closed-loop system) and an external loop (reconfiguration control), is used to increase fault tolerance in control systems (e.g., Rodriguez-Alfaro et al, 2013;Krokavec et al, 2016). Figure 2 shows the cascade control structure for FTC, which uses the nominal system output as reference to be followed when a fault occurs.…”

Section: Region Of Dangermentioning

confidence: 99%

An efficient fault tolerant control scheme for Euler–Lagrange systems

Leal-Leal,

Alcorta-Garcia

2023

International Journal of Applied Mathematics and Computer Scien

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Every closed-loop system holds a level of fault tolerance, which could be increased by using a fault tolerant control (FTC) scheme. In this paper, an efficient FTC scheme for a class of nonlinear systems (Euler-Lagrange ones) is proposed, which guarantees high performance and stability in a faulty system. This scheme was designed on the basis of a cascade control structure in which the inner loop is the closed-loop system and the external loop is the FTC, a generalized proportional integral (GPI) observer-based controller, which manages the fault tolerance level increment. An important issue of the proposed scheme is that the GPI observer-based controller jointly estimates disturbances and faults, providing information about the state of health of the system, and then compensates their effect. The scheme is efficient because only the inertia matrix is required for the controller design, it is able to preserve the nominal control law unchanged and can operate properly without explicit information about system faults (fault diagnostic module). Simulation results, on a pendulum model, show the effectiveness of the proposed scheme for tracking control.

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Section: Region Of Dangermentioning

confidence: 99%

An efficient fault tolerant control scheme for Euler–Lagrange systems

Leal-Leal,

Alcorta-Garcia

2023

International Journal of Applied Mathematics and Computer Scien

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“…The cascade control is used to achieve fast rejection of disturbance before it propagates to the outer part of the plant. To apply for plants with system faults, a cascade state controller structure is proposed in Acosta- Santana et al (2013), to keep intact the original controller and nominal trajectory tracking, while the estimation error is used as basis for the correction. Relaxing the cascade structure existence conditions , in the paper proposed technique generalises this approach in accordance to the model-reference control tenets.…”

Section: Introductionmentioning

confidence: 99%

Enhanced approach to cascade reconfiguration control design

Krokavec

Filasová

2018

IJIEI

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Following the concept of fault tolerant control systems, the paper is concerned with the problem of reconfiguration to retain fault tolerance in control of linear continuous-time systems with system dynamics faults. The main idea is to use a reference model output to be followed when a fault occurs, while the nominal control loop structure is kept untouched and the controllers with nominal parameters remains a part of the reconfigured control loop scheme. The full state control principle is applied for nominal control strategy and the static output control principle is proposed for the compensation control law. Exploiting the D-stability circle region precept, new conditions for control laws parameter design are introduced and proven, as well as stability of the cascade-like reconfiguration structure is analysed in the paper. To illustrate oncoming properties, the proposed feasible procedure is compared with that which was obtained using the bounded real lemma principle. The results, offering the sufficient and necessary design conditions, are illustrated with a numerical example to note the effectiveness of the proposed approach and its applicability.

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Fault Tolerance in Feedback Control Loops

Carrazana,

Garcia

2023

Studies in Systems, Decision and Control

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A cascade structure approach to control reconfiguration

Cited by 7 publications

References 8 publications

An efficient fault tolerant control scheme for Euler–Lagrange systems

An efficient fault tolerant control scheme for Euler–Lagrange systems

Enhanced approach to cascade reconfiguration control design

Fault Tolerance in Feedback Control Loops

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