A kind of small feature loss accuracy Guidance and control method based on Optic flow information

The present invention relates to a kind of small feature loss landing guidance control method, in particular to a kind of small feature loss accuracy Guidance and control method based on Optic flow information belongs to deep-space detection field.This method obtains the Optic flow information of detector using optical flow method: the sight information in touch-down zone: the touch-down zone sight information that the Optic flow information and step 3 obtained using step 2 is obtained is obtained using camera, control law needed for designing detector landing process, seek the control acceleration a of detector, it is brought into formula (1), correct horizontal direction position deviation, and then detector horizontal position is constrained, realize accuracy.This method obtains the sight information in touch-down zone using satellite-based navigation camera, does not need to introduce new sensor equipment, and have the potential quality as spare navigational guidance scheme.