| Popis: |
X-ray pulsar navigation is a critical and frontier technology for spacecraft’s autonomous navigation in future. Now an effective database of pulsars angle position with high precision has not been developed. The precision of pulsar angle position measurement could be greatly improved by observing a pulsar jointly at the same time with several satellites. While observing the same pulsar the satellites have to set their attitude and orbit coordinately. There should be a constraint of tasks, spatial graphs, agreements and time in the observing process. In paper a plan of observing a pulsar at the same time by several satellites is put forward, a method of multi-satellites coordinated control is presented, and a digital experiment is carried out for simulating the proposed scheme. As results, the plan is feasible, the controller of the satellites orbit position and attitude is stable, the plan and control method is especially suitable for X-ray pulsar interferometry so that the accuracy of pulsar angle position can be improved by observation with multi-satellites formation. |
