Insertion Error
Author: Tianjiang Says
Website: https://cislunarspace.cn
Definition
Insertion error refers to the deviation between the actual orbital state and the designed orbital state when a spacecraft enters its target orbit. Insertion error is one of the most critical error sources in orbital missions, directly affecting subsequent orbital dynamics evolution and mission execution accuracy.
Error Sources
| Error Type | Description |
|---|---|
| Velocity error | Velocity magnitude and direction errors due to engine thrust deviations |
| Position error | Deviation between the actual insertion point and the designed position |
| Time error | Deviation between the actual insertion time and the designed time |
Impact on DRO Orbits
In DRO missions, insertion error analysis is significant:
- Short-term impact: Insertion errors cause the spacecraft to deviate from the designed orbit, producing position errors
- Long-term impact: Without control, insertion errors accumulate over time, causing gradual orbit deviation
- Sensitivity analysis: Monte Carlo simulation analysis of insertion error effects on orbit stability provides error tolerance references for mission design
Related Concepts
References
- Chen Yuju. DRO Orbit Design and Control Research for Cislunar Space Situation Awareness[D]. 2024.