A Free Ballistic Construction Method with Specified Launch Elevation Angle

Abstract

The invention discloses a free ballistic construction method for specifying the launch elevation angle. Firstly, the ground-fixed rectangular coordinate vector of the launch point and the target point, the difference between the geodetic latitude and the geocentric latitude, the horizontal angle, and the center of the earth of two points A and B are sequentially calculated. The difference between the ratio of radial modulus and 1; in the iterative initial shape and two-body motion model, the launch velocity of the forward or reverse trajectory in the orbital coordinate system and the launch velocity in the ground-fixed coordinate system are solved, and the trajectory / Orbit element σ and flight time and other variables, the newly calculated flight time is T * ; Let T = T * , repeatedly iteratively calculate the firing speed of the missile, etc., until |T‑T * |Less than the set threshold S t When the iteration ends, the launch velocity and flight time T of the missile under the two-body motion model are finally obtained, and the design parameter v is output p , v r , T, σ. The invention can be used respectively in the two-body motion model and considering the earth's gravitational field J 2 The forward and reverse trajectories are constructed with the specified launch elevation angle under the dynamic model of item perturbation, and then all the trajectories from the launch point to the target point are obtained by traversing the launch elevation angle.

Description

technical field [0001] The invention belongs to the ballistic structure technology for solving ballistic missiles under the framework of celestial mechanics, in particular to a free ballistic structure method with a specified launching elevation angle. Background technique [0002] Ballistic structure is the basis of ballistic research and element design. The full ballistic is composed of active section, free flight section and reentry section. The full ballistic structure is usually based on the specific performance parameters of the missile. Its realization requires some difficult-to-know technical parameters and physical conditions, and the calculation process is complex and time-consuming, which cannot meet the general ballistic research and application requirements. In contrast, the free-flight segment, which occupies most of the entire trajectory, is simple in force, mainly due to the gravitational force of the earth on the center of mass of the missile body, and the d...

AI Technical Summary

Problems solved by technology

Method 1 does not give the missile construction method considering the perturbation force, nor does it solve the ballistic construction method when the launching point and the target point have different geocentric radial lengths, and cannot meet the requirements of high-precision ballistic construction

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