Practical bumpless transfer design for switched linear systems: application to aeroengines

• Published in: IEEE transactions on industrial informatics Vol. 19; no. 12; pp. 1 - 10
• Main Authors: Wen, Si-Xin, Shi, Yan, Pan, Zhuo-Rui, Sun, Xi-Ming
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 01-12-2023; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: aeroengine; Aircraft propulsion; bench test; Bivariate analysis; Bumpless transfer; Closed loop systems; Compensators; Control systems; Dwell time; Dynamic stability; Engines; Hardware-in-the-loop simulation; Linear systems; switched linear systems; Switches; Switching; Transient analysis; Turbofan engines; Turbojet engines
• ISSN: 1551-3203; 1941-0050
• DOI: 10.1109/TII.2023.3254659

Since the output signal of the controller is prone to jump suddenly when a switching occurs, the practical system usually suffers from undesired bumps. To address this "bump" phenomenon, a parameters-free bumpless transfer structure based on multiple differentiators and a co-integrator is proposed in this study. The proposed structure is applicable for switching between manual and automatic modes, as well as switching during steady state and transient state. Unlike the previous compensator-based BT methods, our structure exploits the continuous property of the integrator, which prompts optimal performance and preserves original performance. Furthermore, sufficient conditions based on the dynamic dwell time are given to guarantee the stability of switched linear systems. At last, the designed BT approach is applied to a bivariate turbofan engine and a micro-turbojet engine, wherein the hardware-in-the-loop tests and real bench tests are performed respectively, so as to demonstrate the significant improvement and potential for practical engineering.