초록 ▼

A low flight method for automatic course determination when approaching a given target site is disclosed wherein a terrain memory is used in which terrain points in grid type distribution of the terrain in question with height coordinates associated with them are stored digitally (digital terrain he

A low flight method for automatic course determination when approaching a given target site is disclosed wherein a terrain memory is used in which terrain points in grid type distribution of the terrain in question with height coordinates associated with them are stored digitally (digital terrain height model). By means of a rough analyzer, spaced at possibly variable first time intervals Dn) starting from a respective momentary flight position (P1) and oriented with its center direction (MF) toward the target site (Pz) and consisting of several adjacent segments (Si) is placed. For each segment (Si) a mean value of the height coordinates of the terrain points situation in it is calculated, and the segment (S4) having the smallest mean value is determined. By means of a fine analyzer (4), within each of the first time intervals DDm) of smaller radius by comparison with the first fan (Fn) starting from the momentary flight position (P1, P2, etc.) and oriented with its center direction (Mfm) into the momentary flight direction and consisting of three adjacent segments (sj) is placed. For each segment (sj) a mean value of the height coordinates of the terrain points situated in it is calculated, and by means of a flight path finder (5) the three differences of these mean values are formed and compared in each instance with a predeterminable limit value (G). In case none of the three mean values exceeds the limit value (G), a course correction command for approximation to the flight direction which corresponds to the segment previously determined in the rough analyzer, and in case at least one of the respective mean values exceeds the limit value (G), determining the momentary flight course according to which of the respective segments (sj) the lowest mean value is present in.

대표청구항 ▼

A low flight method for automatic course determination when approaching a given target site, comprising the steps of: storing digitally, in a terrain memory, terrain points in a grid type distribution and also storing height coordinates associated with the terrain points to form a digital terrain he

A low flight method for automatic course determination when approaching a given target site, comprising the steps of: storing digitally, in a terrain memory, terrain points in a grid type distribution and also storing height coordinates associated with the terrain points to form a digital terrain height model; forming, by means of a rough analyzer, at first time intervals Dn) starting from a respective momentary flight position (P1) and oriented with a center direction (MF) toward the target site (P2) and comprising a plurality of adjacent fan segments (Si), calculating for each fan segment (Si) a mean value of the height coordinates of the terrain points situated in the fan segment, and determining the fan segment having the smallest mean value; forming, by means of a fine analyzer, within each of the first time intervals DDm) of smaller radius by comparison with the first fan (Fn) starting from the momentary flight position (P1, P2, etc.) and oriented with its center direction (Mfm) into the momentary flight direction and comprising a plurality of adjacent smaller fan segments (sj), and calculating for each smaller fan segment (sj) a mean value of the height coordinates of the terrain points situated in the respective smaller fan segments; determining, by means of a flight path finder, the respective differences of said mean values of the smaller fan segments and comparing the differences in each instance with a predetermined limit value (G); forming, if none of the respective mean values exceeds the limit value (G), a course correction command for approximating the flight direction which corresponds to the fan segment previously determined in the rough analyzer to have the smallest mean value; and forming, if at least one of the respective mean values of the smaller fan segments exceeds the limit value (G), a course correction command for the momentary flight course according to the respective smaller fan segment (sj) the lowest mean value is present in.