自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 27    No. 6    June 2020

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Galerkin-based extended Kalman filter with application to CO2 removal system
LV Ming-bo(吕明博), LI Yun-hua(李运华), GUO Rui(郭锐)

School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China

Abstract:The carbon dioxide removal system is the most critical system for controlling CO2 mass concentration in long-term manned spacecraft. In order to ensure the controlling CO2 mass concentration in the cabin within the allowable range, the state of CO2 removal system needs to be estimated in real time. In this paper, the mathematical model is firstly established that describes the actual system conditions and then the Galerkin-based extended Kalman filter algorithm is proposed for the estimation of the state of CO2. This method transforms partial differential equation to ordinary differential equation by using Galerkin approaching method, and then carries out the state estimation by using extended Kalman filter. Simulation experiments were performed with the qualification of the actual manned space mission. The simulation results show that the proposed method can effectively estimate the system state while avoiding the problem of dimensional explosion, and has strong robustness regarding measurement noise. Thus, this method can establish a basis for system fault diagnosis and fault positioning.

 

Key words: carbon dioxide removal system; Galerkin; infinite nonlinear filter; extend Kalman filter

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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