Switching Control of Acceleration and Safety Protection for Turbo Fan Aero‐Engines Based on Equilibrium Manifold Expansion Model

Abstract

This paper presents a switching control strategy to solve the acceleration problem with safety constraints for aero‐engines. The proposed strategy is based on an equilibrium manifold expansion (EME) model. That brings a more precise description for the dynamic behavior of the aero‐engine during the acceleration procedure. The acceleration controller, the safety protection controller, and the set‐point controller are designed separately for the respective objectives with more degree of freedom and less conservatism. Based on Lyapunov function, the switching law is properly designed to ensure asymptotic stability with acceleration constraint and the high pressure turbine outlet temperature safety constraint for the nonlinear EME model. It is not necessary to construct a minimum phase nonlinear system using the proposed strategy. The effectiveness of the proposed strategy is verified through a case study where the controller designed based on the EME model is used for a nonlinear component‐level (NCL) model. Simulation also indicates better performance from using the proposed strategy than the existing method.

Exponential quasi‐(Q,S,R)‐dissipativity and practical stability for switched nonlinear systems

“…given in. 20 In fact, according to Theorem 2, both Systems (29) and (30) are exponentially quasi-(Q,S,R)dissipative under the switching law (37). Then, the practical stability is obtained for the feedback interconnection of two exponentially quasi-(Q,S,R)-dissipative systems.…”

“…Remark 12. Under the switching law (37), Systems (29) and (30) are allowed to switch asynchronously. This can provide more freedom for design.…”

“…27,28 On the other hand, switched systems have attracted a great deal of attention in the control area due to their application to practical engineering. [29][30][31] A switched system consists of a finite number of subsystems and a switching rule that determines which subsystem is activated. 32 Several approaches have been proposed to solve control problems for switched systems, such as the common Lyapunov function technique 32 the multiple Lyapunov functions method, 33,34 and the average dwell time approach.…”

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

“…Almost all the performances of aircrafts are decided by the operation for aero-engines. Therefore, the control of aero-engines is particularly important [1][2][3][4].…”

Off-equilibrium linearisation-based nonlinear control of turbojet enginese with sum-of-squares programming

“…Bruzelius et al (2) applied an LPV model-based gain scheduling design to a turbofan engine and obtained a controller with good performance. Sui et al (3) first proposed a system identification method based on an equilibrium manifold expansion model, and further developed an equilibrium manifold expansion model of LPV form that showed good modelling accuracy (4) . Zhao et al (5) investigated a feedback linearisation control method for aeroengines.…”