Abstract
According to the tracking error of reaction control system (RCS), a new precision control strategy is proposed for the initial reentry phase of reentry vehicle. Firstly, a nonlinear disturbance observer (DOB) is used for observing the model uncertainty and/or external disturbances. Secondly, a sliding mode control system for the fast loop and slow loop is designed by back-stepping style, and obtained the optimal combination of RCS by linear optimization. Besides, a Integral PWPF Modulator (IPWPF) is proposed based on traditional PWPF modulator, and its stability is proved by a describing function. Finally, the simulation indicates a great precision of the method.
| Original language | English |
|---|---|
| Pages (from-to) | 511-516 |
| Number of pages | 6 |
| Journal | Guti Huojian Jishu/Journal of Solid Rocket Technology |
| Volume | 40 |
| Issue number | 4 |
| DOIs | |
| State | Published - 1 Aug 2017 |
Keywords
- Disturbance observer
- PWPF modulator
- Reaction control system
- Reentry vehicle
- Sliding mode
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