| Title |
A Study on Passive Homing Trajectory for Maximizing Target Information |
| Authors |
나원상(Won-Sang Ra) ; 신효상(Hyo-Sang Shin) ; 정보영(Bo-Young Jung) ; 황익호(Ick-Ho Whang) |
| DOI |
http://doi.org/10.5370/KIEE.2019.68.1.172 |
| Keywords |
Passive target tracking ; Target information ; Energy optimal guidance law ; Saddle point problem |
| Abstract |
This paper deals with the problem of generating the energy optimal trajectory which is intended to enhance the target tracking performance of a passive homing missile. Noticing that the essence of passive target tracking is the range estimation problem, the target information gathered by passive measurements can be readily analyzed by introducing the range estimator designed in line-of-sight(LOS) frame. Moreover, for the linear filter structure of the suggested range estimator, the cost function associated with the target information is clearly expressed as a function of the line-of-sight rate. Based on this idea, the optimal missile trajectory maximizing the target information is obtained by solving the saddle point problem for an indefinite quadratic cost which consists of the target information and the energy. It is shown that, different from the previous heuristic approaches, the guidance command producing the optimal passive homing trajectory is produced by the modified proportional navigation guidance law whose navigation constant is determined by the weighting coefficient for target information cost. |