Trajectory Optimization of MBFL-SAR Imaging for the Phase Diving to Targets
Missile-borne bistatic forward-looking synthetic aperture radar(MBFL-SAR)can achieve full-range,forward-looking,two-dimensional high-resolution imaging during the diving phase,enabling collaborative combat between missiles and im-proving guidance accuracy.In response to the issue that the trajectory of the transmitter directly affects the resolution of bistatic im-aging,the two-dimensional resolution characteristics of the diving phase in the MBFL-SAR are analyzed.Combined with the motion characteristics of the missile,under the constraints of two-dimensional resolution and missile kinematics,the three-dimensional ac-celeration variations of the missile are used as optimization variables,and an objective function related to the angle between the reso-lutions in the scene is constructed.An improved genetic algorithm is employed for the trajectory optimization of the transmitter.Com-pared with the existing trajectory design method based on a linear attenuation model,the trajectory optimization method proposed in this paper can better meet the requirements of high-resolution imaging.
万方数据
维普
