发明名称 |
AUTONOMOUS ON-BOARD ORBIT CONTROL/MAINTENANCE SYSTEM FOR SATELLITES |
摘要 |
PCT No. PCT/US97/22612 Sec. 371 Date Jun. 2, 1999 Sec. 102(e) Date Jun. 2, 1999 PCT Filed Dec. 4, 1997 PCT Pub. No. WO98/25156 PCT Pub. Date Jun. 11, 1998An apparatus and method for orbit control and maintenance techniques for both individual satellites and for multiple satellites in a constellation utilizing Modern Feedback Control for providing precise autonomous on-board navigation and control. This control system can place any satellite in any orbit position in a constellation, including the acquisition of the initial distribution for the constellation after satellite separation from launched vehicles. This system can also maintain distribution within a constellation, including station relocation and station keeping. Utilizing GPS position information, the orbit state vector is determined and modem advanced multivariable feedback control techniques, for example, linear quadratic Gaussian/loop transfer recovery controllers or optimal H-Infinity Robust Controllers are used to design a navigation and control system. The present invention uses a feedback control system designed to attenuate the external perturbations and provide robustness against unstructured uncertainty. The control problem is converted into first a tracking problem and a regulator design problem where the control problem is to minimize both position error and velocity error between the satellite (pursuer) and a nonexistent target satellite in an ideal orbit. The elimination of position error and velocity error result in an optimal orbital control system. |
申请公布号 |
WO9825156(A3) |
申请公布日期 |
1998.08.27 |
申请号 |
WO1997US22612 |
申请日期 |
1997.12.04 |
申请人 |
PARVEZ, SHABBIR, AHMED;XING, GUANG-QIAN |
发明人 |
PARVEZ, SHABBIR, AHMED;XING, GUANG-QIAN |
分类号 |
B64G1/10;B64G1/24;B64G1/36;B64G3/00;G05D1/08 |
主分类号 |
B64G1/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|