Performance Determination of a Multi-Mode Thruster Using GPS and Star Tracker Data
| Autor: | Jacob E. Darling, Kyle J. Craft, Henry J. Pernicka |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
020301 aerospace & aeronautics
010504 meteorology & atmospheric sciences Spacecraft business.industry Computer science Payload Pseudorange ComputerApplications_COMPUTERSINOTHERSYSTEMS Thrust 02 engineering and technology Propulsion GPS signals Accelerometer 01 natural sciences Star tracker Orbit 0203 mechanical engineering GNSS applications Drag Global Positioning System Specific impulse Aerospace engineering business 0105 earth and related environmental sciences |
| Zdroj: | 2020 IEEE Aerospace Conference. |
| Popis: | A key element of the Advanced Propulsion Experiment (APEX) spacecraft mission is the accurate thrust determination of a Multi-Mode Ionic Monopropellant Electrospray (MIME) thruster payload. The MIME thruster payload operates in high thrust, low specific impulse chemical mode and low thrust, high specific impulse electric mode, making standard thrust determination processes by accelerometer or attitude maneuver infeasible. The development of a batch filter to determine thrust from an orbit changing maneuver is presented. The batch filter estimates a constant thrust magnitude along with the dynamic states of the vehicle, the coefficients of drag and solar reflectivity and the time biases of the GNSS receiver. To improve accuracies in GPS pseudorange measurements, the International GNSS Service Final Product GPS ephemeris and clock biases are used to improve position and thrust determination. The statistical consistency of the batch filter was verified using a Monte Carlo analysis. An initial investigation of desired maneuver duration and attitude was performed in order to assist in APEX mission design and concept of operations development. |
| Databáze: | OpenAIRE |
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