Lynn, Shane A. and Ringwood, John and Del Valle Gamboa, Juan Ignacio (2009) Temperature Estimation for a Plasma-Propelled Rocket Engine. IEEE Control Systems Magazine, 29 (6). pp. 15-25. ISSN 0272-1708

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Abstract

The VASIMR propulsion system is an ion propulsion system for spacecraft that uses magnetic fields to accelerate plasma to produce thrust. Undesired heat produced in the helicon section of VASIMR must be monitored and removed safely to avoid damage to system components, especially when higher power operating regimes are explored. This article demonstrates a strategy for distributed temperature estimation, based on OES measurement, and a model where the states represent the distributed temperature profile. OES provides a noninvasive measurement technique, which can be used as an output "correction" term for a state-estimation scheme. In this application, it is shown that the 2048 OES channels recorded can be accurately represented by only three principal components for temperature estimation. Use of the principal components as corrector terms in the state-space model dramatically improve model accuracy and the capability of the model to recover from unknown initial conditions and multiple system input changes.

Item Type:	Article
Keywords:	rocket engines; spectroscopy; temperature distribution; temperature estimation; plasma-propelled rocket engine;
Academic Unit:	Faculty of Science and Engineering > Electronic Engineering
Item ID:	2122
Depositing User:	Professor John Ringwood
Date Deposited:	22 Sep 2010 15:44
Journal or Publication Title:	IEEE Control Systems Magazine
Publisher:	IEEE Control Systems Society
Refereed:	Yes
URI:	http://ieeexplore.ieee.org/xpl/RecentIss...
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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