Space Rendezvous Phase Laser Ranging Technology

Rendezvous is one of the very complex processes in space mission. Laser radar is widely used in space rendezvous for its superiority in resolution and anti-jamming. Based on the background of the "Ten-Five" Technology Project, Phase-shift laser rangefinder for the final approach moment(10～1000m) of space rendezvous is designed in this dissertation. The measure range and precision of phase-shift rangefinder is analyzed in details in this paper. The cooperative target module and non-cooperative module is established according to the condition of space and the relationship between emission and receiving power in these two modules is presented. After the analysis of SNR of receiving system the expression of relationship between emission power and measure range is presented.The circuit principle of phrase-shift rangefinder for space rendezvous is designed. The high speed movement of object and rapid change of intensity of received optical signal determined traditional methods of phase-shift distance measuring can not be used in space working condition. A new phase detecting methods is demonstrated in this paper which including technology of A/D high-speed sampling and interior fiducially signal sampling.According to above principle the hardware and software of logic part of rangefinder is designed. The hardware is based on MSP430F437 micro controller and the program is compiled with IAR Embedded Workbench. In the end, the software is debugged in whole system and has good performance.All of done offers the important referenced value to develop phase-shift laser rangefinder system for space rendezvous.