Estimation of System States for Non-Measured Parameters and Integration with a Digital Twin framework to Boost Spacecraft Autonomy and Awareness

Date

7/10/2022

Journal Title

Journal ISSN

Volume Title

Publisher

51st International Conference on Environmental Systems

Abstract

As technologies for human exploration develop to meet the challenges of Lunar and Mars transit and habitation, there is increasing need for technologies that boost vehicle autonomy and awareness with or without human presence. This need for autonomy is driven largely by distance, with two-way communications and resupply lead times exceeding practical limits for a more traditional ground-supported habitat such as the International Space Station. Vehicle autonomy depends on awareness, which relies on sufficient data to inform and predict the state of health of critical systems. This paper will describe a use case for the estimation of states of a carbon dioxide removal system which will mimic the operation of the Simulation Testbed for Exploration Vehicle ECLSS (STEVE), a physical testbed built and operated at the University of Colorado Boulder. Specifically, this paper uses state estimation and physics first principles to estimate the state of parameters inside the testbed�s sorbent bed. Parameters within the bed must be estimated because sensors cannot be introduced internally to the sorbent bed without affecting performance. In addition to generating data about system state of health, vehicle awareness also relies on the availability of sensor data for use by autonomous agents or intelligent modules aboard a spacecraft. This paper proposes a Digital Twin architecture that acts as the framework for storage, transport, and the exchange of data in an autonomous and self-aware vehicle.

Description

Monica Torralba, Masters Student, Mechanical and Aerospace Engineering Department, University of California Davis, 95616, US
Cory George, Masters Student, Mechanical and Aerospace Engineering Department, University of California Davis, 95616, US
Stephen Robinson, Professor, Director, University of California Davis Center for Spaceflight Research, 95616, US
Samuel Eshima, PhD Student, Smead Aerospace Engineering Sciences, University of Colorado Boulder, 80303, US
James Nabity, Associate Professor, Smead Aerospace Engineering Sciences, University of Colorado Boulder, 80303, US
ICES301: Advanced Life Support Systems Control
The 51st International Conference on Environmental Systems was held in Saint Paul, Minnesota, US, on 10 July 2022 through 14 July 2022.

Keywords

autonomy, autonomous space habitat, self-aware, estimation, system health, Digital Twin, CO2 removal, ECLSS

Citation