Abstract
Attitude control instability occurs for reaction wheel failure in the phase of accurate attitude control of a space tethered robot. In order to solve this problem, a new attitude tolerant control method is proposed in the paper. A time-delay control algorithm is utilized to introduced previous one-step control information into the current control law, and the current changed control information is estimated and compensated. The stability of the tolerant control law is proved, and the time-delay control algorithm is compared with conventional proportional-derivative control algorithm from two cases of reaction wheel with failure and without failure. The simulation results show that the time-delay control method have high accuracy and robustness of tracking target attitude, and have high stability for controlling attitude of space tethered robot when a reaction wheel failure occurs.
| Original language | English |
|---|---|
| Pages (from-to) | 1096-1103 |
| Number of pages | 8 |
| Journal | Yuhang Xuebao/Journal of Astronautics |
| Volume | 33 |
| Issue number | 8 |
| DOIs | |
| State | Published - Aug 2012 |
Keywords
- Attitude
- Fault tolerant control
- Reaction wheel
- Space tethered robot
- Time-delay