Fault estimation for aero‐engine LPV systems based on LFT

Wang, Rui; Liu, Min; Ma, Yanhua

doi:10.1002/asjc.2204

Cited by 17 publications

(11 citation statements)

References 22 publications

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“…Firstly, a family of small deviation models are established by fitting the dynamic response data obtained from an aero-engine nonlinear model after small perturbation experiments [31]. Then, using the matrix pseudo-inverse method, an LPV model is established with the relative conversion speed of the high-pressure rotor as the scheduling parameter [32]. Therefore, a general form of a subsystem for the switched LPV model is established as follows:…”

Section: Modeling For An Aero-enginementioning

confidence: 99%

Optimal control of aero‐engine systems based on a switched LPV model

Wang

Liu

Shi

2021

Asian Journal of Control

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In this paper, an optimal control problem for aero-engines based on a switched linear parameter varying (LPV) model is solved. Firstly, according to the change of external flight conditions, a switched LPV model with different altitudes and Mach numbers is established for aero-engines. Then, since the optimal control of the parameter-dependent switched system cannot be dealt with by traditional methods, we thus propose an optimal control method for the switched LPV system, which includes solving the optimal continuous inputs and the optimal switching instants. Finally, simulations and a hardware in-the-loop test of an aero-engine control system are presented to verify the effectiveness and superiority for the proposed optimal control method.

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Section: Modeling For An Aero-enginementioning

confidence: 99%

Optimal control of aero‐engine systems based on a switched LPV model

Wang

Liu

Shi

2021

Asian Journal of Control

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“…Actuator faults are categorized into additive and multiplicative faults. According to their way of representation [30], [39], the fault input ∆u f (t) = ∆wf f ∆vsv f T ∈ R q is described by…”

Section: A Modeling Of Actuator Faultsmentioning

confidence: 99%

CNN-Based Intelligent Fault-Tolerant Control Design for Turbofan Engines With Actuator Faults

Cheng

Liu

2021

IEEE Access

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In this paper, the problem of fault-tolerant control is investigated for turbofan engines with actuator faults. The controller involvement has repressed the effects of actuator faults on the controlled outputs of turbofan engines, making fault-tolerant control difficult. To solve this problem, the internal gaspath data of turbofan engines is introduced to provide conducive fault information. Besides, the useful property of the convolution neural network (CNN) is explored and utilized in fault-tolerant control. Based on the analysis of actuator faults, by using the Lyapunov stability and L 2-gain like theorems, a novel CNN-based intelligent fault-tolerant control system for turbofan engines is proposed, including a CNNbased fault diagnosis module and a nonlinear fault-tolerant controller with corresponding reconfiguration unit. The CNN-based intelligent fault-tolerant control system has the advantages of reducing the accuracy requirements of the mathematical description of turbofan engines. Furthermore, the proposed system can diagnose actuator faults and reduce the adverse effects of actuator faults on turbofan engines. Finally, simulation results are presented to demonstrate the efficiency of the designed method. INDEX TERMS CNN-based intelligent fault-tolerant control, actuator faults, gas-path data, fault diagnosis, nonlinear fault-tolerant controller, turbofan engines.

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“…The component degradation level is monitored by a diagnostic tool that estimates performance variations from the available measurements and then is used by an observer-based model predictive controller to maintain the safe operation of the engine. In terms of actuator FTC design for aircraft engines, there are only a few pieces of research that address the diagnosis approaches [9,10] of the actuator faults. Very few studies can be found considering the toleration/accommodation problem.…”

Section: Introductionmentioning

confidence: 99%

“…Ahmed Ali et al [16] use the Super-Twisting algorithm, which is a higher-order SMC, to handle the additive and loss-ofeffectiveness actuator faults for diesel engine air path. Trinh et al [17] propose a fault estimation and fault-tolerant control strategy with two observers for a pump-controlled electrohydraulic system (PCEHS) under the presence of internal leakage faults and an external In terms of actuator FTC design for aircraft engines, there are only a few pieces of research that address the diagnosis approaches [9,10] of the actuator faults. Very few studies can be found considering the toleration/accommodation problem.…”

Section: Introductionmentioning

confidence: 99%

Actuator Fault Tolerant Control of Variable Cycle Engine Using Sliding Mode Control Scheme

et al. 2021

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This paper presents a fault tolerant control (FTC) design for the actuator faults in a variable cycle engine (VCE). Ensured by the multiple variable geometries structure of VCE, the design is realized by distributing the control effort among the unfaulty actuators with the “functional redundancy” idea. The FTC design consists of two parts: the fault reconstruction part and the fault tolerant control part, which use a sliding mode observer (SMO) and a sliding mode control (SMC) scheme respectively. Considering the inaccuracy of the fault reconstruction result, the proposed design requires only inaccurate fault information. The stability of the closed-loop control system is proved and the existence condition for the proposed control law is analyzed. This work also reveals its relation to the sliding mode control allocation design and the adaptive SMC design. An application case is then studied for tolerating the loss of effectiveness fault of the nozzle area actuator. Results show that the FTC design is able to tolerate the fault and achieves the same control goal as in the fault-free situation. Finally, a hardware-in-the-loop test is carried out to verify the design in a real-time distributed control system, which demonstrates its use from the engineering perspective.

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Fault estimation for aero‐engine LPV systems based on LFT

Cited by 17 publications

References 22 publications

Optimal control of aero‐engine systems based on a switched LPV model

Optimal control of aero‐engine systems based on a switched LPV model

CNN-Based Intelligent Fault-Tolerant Control Design for Turbofan Engines With Actuator Faults

Actuator Fault Tolerant Control of Variable Cycle Engine Using Sliding Mode Control Scheme

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