CN103759592A - High-precision rotary table tracing technology of laser weapon - Google Patents

Abstract

The invention relates to a high-precision rotary table tracing technology of laser weapons. A rotary table of a tracer is coaxial with a CCD aiming error taker, in a proving ground, the distance between the rotary table and a target screen is 12.5 meters, the distance between a small rotary table and the target screen is 8 meters, and the central line of the small rotary table and the central line of the large rotary table are located on the same straight line; the small rotary table is used for simulating the motion trail of a target and marking bright spots on the screen according to a typical route designed by a program, wherein the track of the bright spots is the motion trail of the target; the designed air route is that the target speed is 130 m/s, the target height is 315 meters, and the target shortcut is 950 meters; by converting to a coarse tracing system, the rotating speed is about 7.85 degrees per second; the technology indexes of the large rotary table are that the angular accuracy is 5 urad, the sampling frequency is 250 Hz, both the transverse and longitudinal accuracy of the CCD error taker are 60 urad, the sampling frequency is 50 Hz, the distance measuring accuracy of the laser is 5 metrs, and the sampling frequency is 20 Hz. The high-precision rotary table tracing technology of laser weapons has advantages of high speed and high precision.

Description

Laser weapon high precision turntable tracking technique

Technical field

The invention belongs to tracking field, particularly the high-precision turntable tracking technique of a kind of laser weapon.

Background technology

Laser weapon is a kind of directed energy weapon, can utilize the huge energy that high brightness intense laser beam carries to destroy enemy missile.Have speed fast, be swift in response, maneuverability, power of regeneration is strong, precision is high, efficiency-cost ratio is high, be not subject to the advantages such as electromagnetic interference.Be different from the weapons such as shell, guided missile, the attack principle of airborne laser weapon is not the chemical energy by explosive, neither lean on the kinetic energy of bullet, but lean on thermal ablation and thermal explosion to realize, kills and wounds, and it is one of future developing trend.So, the tracker tenacious tracking technology of research high-precision laser weapon is most important, be different from conventional artillery system, tradition weapon is tackled target, because bullet will fly a period of time in playing order Encounter Time section, what artillery system aimed at is future target position, the accuracy of shooting also depends on the Accurate Prediction that fire control system is not given me a little target and resolves, and laser weapon is quite different, because the light velocity is far away higher than the speed of target, in limited shooting distance, the time that laser consumes need not be considered substantially, so, so what Laser Interception device aimed at is the current point of target, it is very high to the required precision of tracker, angular metric error is all in differential of the arc level.

Summary of the invention

In order to overcome the shortcoming of prior art, the invention provides a kind of laser weapon high precision turntable tracking technique.Its speed is fast, and precision is high.

The present invention solves the technical scheme that its technical problem takes: it is coaxial that tracker turntable and CCD collimating fault are got poor device, in test site, turntable distance objective screen 12.5m, little turntable distance objective screen 8m, and with large turntable center line point-blank, little turntable is used for simulated target movement locus, by the good typical air route of programming, on screen, stamp a bright spot, the track of bright spot is the track of target travel; Design air route: target velocity 130m/s, object height 315m, target shortcut 950m; Conversion is rotated approximately 7.85 °/s to thick tracking system; Large turntable technical indicator is: angle accuracy of measurement is 5urad, sample frequency 250Hz, and CCD gets poor device laterally and Longitudinal precision is 60urad, sample frequency 50Hz, laser instrument range accuracy 5m, sampling 20Hz.

Speed of the present invention is fast, and precision is high.

The specific embodiment

It is coaxial that tracker turntable and CCD collimating fault are got poor device, in test site, turntable distance objective screen 12.5m, little turntable distance objective screen 8m, and with large turntable center line point-blank, little turntable is used for simulated target movement locus, by the good typical air route of programming, on screen, stamp a bright spot, the track of bright spot is the track of target travel; Design air route: target velocity 130m/s, object height 315m, target shortcut 950m; Conversion is rotated approximately 7.85 °/s to thick tracking system; Large turntable technical indicator is: angle accuracy of measurement is 5urad, sample frequency 250Hz, and CCD gets poor device laterally and Longitudinal precision is 60urad, sample frequency 50Hz, laser instrument range accuracy 5m, sampling 20Hz.

Workflow of the present invention is: the coordinates of targets that large turntable tracker is caught on screen is bright spot, CCD records the error of revolving table position and target location simultaneously, and by error propagation to turntable, turntable is by self position and the CCD data fusion of getting poor device this moment, input quantity as turntable, drive turntable tracking target, adopt least squares filtering method, least squares filtering model is:

$y=-\frac{2}{n}\mathrm{\Σ}{y}_i+\frac{6}{n(n+1)}\mathrm{\Σj}\·y_i$

$a=-\frac{6}{\mathrm{\ΔT}(n-1)n}\mathrm{\Σ}{y}_i+\frac{12}{\mathrm{\ΔT}(n^2-1)n}\mathrm{\Σj}\·y_i$

Y _ifor the angular metric of sampling, j(gets 1,2, be 3...) sampling number, and y is the angle value after smoothly, and a is filtering speed amount out, ∑ y _ifor the summation of the angle value of sampling in the observation cycle, △ T is the sampling period, and n is sampling number.

By repetition test, comparison, when n=4, for typical air route, the deviation of CCD is minimum, and statistics RMS is 203urad, is much higher than the technical indicator of expection.

Claims (1)

1. a laser weapon high precision turntable tracking technique, it is characterized in that: it is coaxial that tracker turntable and CCD collimating fault are got poor device, in test site, turntable distance objective screen 12.5m, little turntable distance objective screen 8m, and with large turntable center line point-blank, little turntable is used for simulated target movement locus, by the good typical air route of programming, on screen, stamp a bright spot, the track of bright spot is the track of target travel; Design air route: target velocity 130m/s, object height 315m, target shortcut 950m; Conversion is rotated approximately 7.85 °/s to thick tracking system; Large turntable technical indicator is: angle accuracy of measurement is 5urad, sample frequency 250Hz, and CCD gets poor device laterally and Longitudinal precision is 60urad, sample frequency 50Hz, laser instrument range accuracy 5m, sampling 20Hz.