Study And Application Of Time Synchronization In Kinematic Surveying

It has great demands in the spacecraft Rendezvous and Docking (RVD) engineering for various technology index such as real-timing, reliability and precision. Compared with the traditional method, the multi-sensor dynamic surveying system has the advantage of high precision, fast dynamic and high reliability, and it can resolve many surveying problem well in RVD. To realize the real-time and to get the exact location and state of space object, it is the key for the data to be in a complete synchronization between the sensors. In the background of RVD simulator's integrative check, around the data synchronization, this paper carries on a series of study and completes the correlative experiment and application work. The main contents are as following:1. It studies the theory of hardware and software synchronization's methods and analyzes their characteristics respectively. On base of that, it introduces a solution by which tests the capability of PCS in LAN through a single equipment.2. It completes the time synchronization between computers in various methods. According to the analysis of the result, it makes a conclusion that the clock drift of the computer is the main factor which affects the synchronization precision, and it puts forward the relevant correction solution.3. It studies the methods of network communication and the communication between sensor and computer. At the same time, it solves the problem of data traffic and collection between hardware by writing correlative software.4. It studies the time response characteristic of sensor on which puts forward a solution of the effective data collection.5. It introduces the data interpolation which interpolates three dimension coordinates of the tracker on the datum of time. In this way, it resolves the problem of P2P synchronization between the sensor's data.6. It applies successfully the time synchronization in the integrative simulation test of multi-sensors.