Improvement of Min–Max limit protection in aircraft engine control: An LMI approach

Imani, Amin; Montazeri-Gh, Morteza

doi:10.1016/j.ast.2017.05.017

Cited by 39 publications

(14 citation statements)

References 7 publications

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“…However, the changes proposed in this study necessitate a complete redesign of the engine controller, which will impose challenges in terms of verification across the whole operating envelope and acceptance by engine control implementers [1]. Some methods to shape the response characteristics of the engine outputs are to reduce the possibility of limit violation in the transient regime [11][12][13]; the second current research interest is to improve the switching logic of the Min-Max strategy, which can reduce unnecessary controller switching and improve the dynamic performance of the engine by adding information on key engine parameters as the basis of control loop switching [14]. Thirdly, is the stability verification of the Min-Max strategy, including the stability verification of the Min-Max control strategy with a sliding mode controller [15], and the substitution of Min and Max selectors with nonlinear equivalents, so as to transform the control system into the Lure's system for stability verification [16].…”

Section: Introductionmentioning

confidence: 99%

An Output-Based Limit Protection Strategy for Turbofan Engine Propulsion Control with Output Constraints

Qin

Pan

et al. 2019

Energies

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To accomplish the limit protection task, the Min-Max selection structure is generally adopted in current aircraft engine control strategies. However, since no relationship between controller switching and limit violation is established, this structure is inherently conservative and may produce slower transient responses than the behavior by engine nature. This paper proposes an output-based limit management strategy, which consists of the safety margin module and the parameter prediction module to monitor system responses, plus the switching logic to govern switches between the main controller and limiters, and, in this way, a faster transient performance is achieved, and the limit protections in transient states become more effective. To realize smooth switching control, the linear-quadratic bumpless transfer method is developed. The design principle of the multi-loop switching control and bumpless compensator is detailed, and the effect-on limit protection control performance-of the design parameters in the safety margin and parameter prediction modules are also analyzed. The proposed approach is tested using simulations covering the whole flight envelope on the nonlinear component-level model of a turbofan engine, and the superiority over the Min-Max architecture is also validated.

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Section: Introductionmentioning

confidence: 99%

An Output-Based Limit Protection Strategy for Turbofan Engine Propulsion Control with Output Constraints

Qin

Pan

et al. 2019

Energies

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“…thrust class, linearized at an altitude of 25,000 ft. and Mach number 0.62 is considered. And it is obtained from the Commercial Modular Aeropropulsion System Simulation (C-MAPSS) [10,11]. Table 1 (1)…”

Section: The Improvement Of Min-max Controllermentioning

confidence: 99%

“…The outputs and their incremental limits come from references [10,11]. SMC Min-Max requires the specification of augmented state references, which includes target steady values for the actuators.…”

Section: Fan Speed Rpmmentioning

confidence: 99%

“…Its parameter values come from the reference [10]. (2) In order to ensure that the limited output does not exceed its limit, SM limit regulators are used for all the limits.…”

Section: Fan Speed Rpmmentioning

confidence: 99%

“…The CA architecture in the Min-Max scheme only activates the limit regulators when the operating point is within a certain bound of the limit and approaching the limit at a faster rate than the prescribed one. Imani et al [10] presented a strategy to design linear regulators of Min-Max selector control to improve transient limit protection by using Linear Matrix Inequalities (LMI) approach. It decreases the possibility of transient limit violation and can be considered as an effective approach to improve Min-Max limit protection in aircraft engine control.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Novel Method on Min–Max Limit Protection for Aircraft Engine Control

Shu

2018

MATEC Web of Conferences

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Abstract. Min-Max selector structure is widely employed in current aircraft engine control logic. And the structure must provide desired thrust and prevent the engine from exceeding any safety or operational limits. In this paper, a new control scheme, that is Min-Max selector structure composed of Sliding Mode (SM) regulator and linear regulator, is presented. The main regulator is a linear regulator and all limit regulators are SM regulators. It could overcome the possibility of limit violation for the traditional Min-Max, and don' t need the augmented state references that is one drawback of SMC Min-Max(all regulators are SM regulator ). The simulation results show that the proposed approach could effectively prevent limit violation and can improve Min-Max limit protection for aircraft engine control.

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Comparison of model predictive controller and optimized min-max algorithm for turbofan engine fuel control

Montazeri-Gh

Rasti

2019

J Mech Sci Technol

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Improvement of Min–Max limit protection in aircraft engine control: An LMI approach

Cited by 39 publications

References 7 publications

An Output-Based Limit Protection Strategy for Turbofan Engine Propulsion Control with Output Constraints

An Output-Based Limit Protection Strategy for Turbofan Engine Propulsion Control with Output Constraints

A Novel Method on Min–Max Limit Protection for Aircraft Engine Control

Comparison of model predictive controller and optimized min-max algorithm for turbofan engine fuel control

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