The Application of Disturbance-Observer-Based Control in Breath Pressure Control of Aviation Electronic Oxygen Regulator

Rui Pan, Guiping Lin, Zhigao Shi, Yu Zeng and Xue Yang
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Rui Pan: School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China
Guiping Lin: School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China
Zhigao Shi: Hefei Jianghang Aircraft Equipment Corporation LTD. AVIC, Hefei 230051, China
Yu Zeng: School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China
Xue Yang: Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China

Energies, 2021, vol. 14, issue 16, 1-16

Abstract: The electronic oxygen regulator (EOR) is a new type of aviation oxygen equipment which uses electronic servo control technology to control breathing gas pressure. In this paper, the control method of EOR was studied, and the dynamic model of the aviation oxygen system was established. A disturbance-observer-based controller (DOBC) was designed by the backstepping method to achieve the goal of stable and fast breath pressure control. The sensitivity function was proposed to describe the effect of inspiratory flow on breath pressure. Combined with the frequency domain analysis of the input sensitivity function, the parameters of the DOBC were analyzed and designed. Simulation and experiment studies were carried out to examine the control performance of DOBC in respiratory resistance and positive pressurization process under the influence of noise and time delay in the discrete electronic control system, which could meet the aviation physiology requirements. The research results not only verified the rationality of the application of DOBC in the breath control of EOR, but also proved the effectiveness of the control parameters design method according to the frequency domain analysis, which provided an important design basis for the subsequent study of EOR.

Keywords: electronic oxygen regulator (EOR); pressure control; disturbance observer; sensitivity function; frequency domain analysis (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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