| The infrared simulation in ballistic target boost phase has an important applied value in many aspects, such as ballistic target identification, inpouring infrared tracking system testing and infrared tracking examination etc. The space-borne infrared detection system design technology is one of important contents in the ballistic missile defense in respect to ballistic target. The thesis takes this as to research background to investigate the key technologies about computer simulation related during the ballistic target boost phase. The main contents include follows:(1) The research method of radiation calculation. In order to calculate the integral of the Planck's blackbody formula within a limited region, trapezoid method and Simpson's method two kinds of numerical integral methods were used, and the analysis and comparison were carried on. On condition that, the radiant emittance value of detector surface was researched, in a certain distance to blackbody. Through the analysis, to make use of the trapezoid method and Simpson's method to obtain the radiant emittance value of blackbody within a limited region conveniently.(2) The research method of infrared radiant in ballistic target boost phase. Which includes two processes, one is flame flow analysis, and the other is the flame infrared radiation calculation. Furthermore, a simple analysis on the two physical models was made.(3) The research method of space-borne infrared detection system. The space detection technology of infrared radiation signal in the ballistic target boost phase is one of the key technologies to discovery and track ballistic target. At the same time, several key technologies in the system design were discussed, which involved the essential factor discussion of system design, referenced to orbital, atmospheric influence and so on. The determination method and the computational steps of the optical system SNR were all studied. The relationships between computational method of system SNR and the wrong alarm ratio were analyzed. |
