Impulse Thrust
Author: Tianjiang Says
Website: https://cislunarspace.cn
Definition
Impulse thrust is an idealized thrust model that assumes a velocity increment () is applied instantaneously, causing an immediate change in the spacecraft's velocity while its position remains unchanged. Impulse thrust primarily uses chemical propulsion.
Comparison with Continuous Thrust
| Feature | Impulse Thrust | Continuous Thrust |
|---|---|---|
| Thrust duration | Extremely short (instantaneous) | Persistent |
| Propulsion type | Chemical propulsion | Electric propulsion, solar radiation pressure |
| Control mode | Closed-loop control | Open-loop control |
| Fuel consumption | Lower | Higher |
| Orbit determination | Coupled with orbit determination | Decoupled from orbit determination |
Application in Orbit Keeping
Impulse thrust orbit keeping is a closed-loop process that typically consumes less fuel than continuous thrust methods. In DRO orbit keeping control, the commonly used method is the targeting method, which maintains the orbit by applying impulse thrust at predetermined maneuver nodes.
Related Concepts
References
- Chen Yuju. DRO Orbit Design and Control Research for Cislunar Space Situation Awareness[D]. 2024.