Method for measuring roll angle of guided cartridge based on scanning laser beams

Abstract

The invention provides a method for measuring the roll angle of a guided cartridge based on scanning laser beams, which is implemented by using a characteristic that laser is good in degree of parallelism and easy to be detected. By using the method, the roll angle of a guided cartridge can be accurately indicated. The method comprises the following steps that: firstly, circularly-arranged multiple laser receivers are arranged at the tail part of the guided cartridge in an equal-angle installation mode; the laser receivers are numbered clockwise, and the first laser receiver is arranged on a y1 axis of a guided cartridge elastic system; a guidance site produces a bar-shaped laser beam, the laser beam projected to a plumbed plane is bar-shaped, and the left and right borders of the cross section of the bar-shaped laser beam are perpendicular to the horizontal plane; the bar-shaped laser beam scams from a missile guided cartridge to the forward direction of a z4 axis of a guided cartridge quasi-elastic system along the backward direction of the z4 axis of the guided cartridge quasi-elastic system at a speed of Vl; the laser receiving time of each laser receiver is recorded; and then the roll angle of the guided cartridge is calculated according to the laser receiving time.

Description

technical field [0001] The invention relates to the technical field of roll angle measurement of gun-launched guided ammunition, in particular to the roll angle measurement of guided shells, which is applied to the initial alignment of the roll angle of the inertial navigation system of the guided shell and provides the roll angle reference of the control system. Background technique [0002] The air alignment of the roll angle of the guided projectile is one of the difficulties in the application of the inertial navigation system in the guided projectile. The high overload of guided projectiles during launch makes traditional mechanical inertial devices almost impossible to apply to the field of guided projectiles. Even MEMS inertial measurement devices with high overload resistance can only withstand the moment of launch when they are not powered on. high overload. In order to calculate the position and attitude of the carrier, the inertial device must first perform initi...

AI Technical Summary

Problems solved by technology

As a carrier, the initial position, velocity, pitch angle and yaw angle of the guided projectile can be obtained before launch, but due to the uncertainty of the roll angle of the guided projectile during and after launch, the roll attitude cannot be obtained during launch. initial alignment

The roll angle alignment of traditional guided shells is carried out by borrowing the measurement data of the geomagnetic induction component, but the geomagnetism is easily disturbed, and the alignment accuracy is limited

Some literature presents an alternative alignment method, that is, a spatially encoded laser beam to provide a roll reference for laser beam guided weapons, but this method has not been applied to guided projectiles to date, mainly due to the need for precision Indicating the roll angle of the guided projectile requires fine spatial encoding technology, so this method is difficult to implement and expensive to use

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