| 摘要 |
The guidance system enables a moving body (1) e.g. an aircraft or missile, to be guided to a predetermined location by allowing the body (1) to view its surroundings and to compare the viewed scene (8) with a reference pattern (eg 24) stored on the body. A number of individual reference patterns (24,25,26,27,28,40 etc) are stored, and each reference pattern corresponds to an area of the surroundings (e.g. 24) which is very much smaller than the field of view (8) and thus the body identifies its position by correlating its field of view (8) with one of the reference patterns (e.g.24). To enable the body (1) to identify its position (30) even if it deviates from an expected path (31), a number of reference patterns (e.g. 24,25,27,28) are laterally displaced from the expected path (31). The extent of the lateral displacements reduces with decreasing distance from a predetermined locaction (40) to which the body (1) is to be guided. |
