A test method for the isolation degree of air-to-ground missile seeker stabilized platform

Abstract

The invention relates to a method for testing the isolation degree of a stabilized platform of an air-to-ground missile seeker. The method is characterized in that the isolation index requires a disturbance of 0.6° to 1.2° in amplitude within the frequency band of the projectile characteristic frequency (80% to 120%) Next, the seeker tracking position deviation is less than 5 pixels. During the test, the seeker is installed on the turntable, the input disturbance signal of the turntable is selected according to the frequency step of 0.2Hz and the amplitude step of 0.3°, the seeker tracks the target, and the output deviation, when under all the selected disturbance signals, the tracking position When the deviation is not greater than 5 pixels, the seeker isolation index is qualified.

Description

technical field [0001] The invention relates to a method for testing the isolation degree of a stabilized platform of an air-to-ground missile seeker, belonging to the field of measurement. Background technique [0002] The seeker outputs a guidance signal to guide the missile to hit the target. The isolation index of the seeker stable platform is one of the most important technical indicators of the seeker. The performance of keeping the position unchanged, the isolation performance is good, the stability accuracy is high, and the accuracy of the guidance signal is high, so as to meet the requirements of the missile's hit accuracy. Meet the requirements for the use of missiles. At present, the isolation index of air-to-ground missile seeker is usually required as follows: under the condition of external disturbance of 3°3Hz, the isolation index is not greater than 3% or 5%. / s sinusoidal motion, the gyro signal on the seeker platform outputs an angular velocity signal, if...

AI Technical Summary

Problems solved by technology

This evaluation method has the following problems: First, the requirements and test methods are incomplete, that is, the performance of the seeker platform meets the requirements of 3% or 5% under 3Hz 3° / s disturbance, but the seeker disturbs the signal at other amplitude frequencies The lower isolation performance is unknown, and the disturbance frequency and amplitude of the missile in flight change within a certain range, so the isolation performance of the seeker may not meet the requirements in actual use; the second is that the index requirements are relatively high, Increase the difficulty of seeker debugging and the development cost of the seeker. Even if the isolation of the platform within 0-3Hz and at different amplitudes can meet the requirements of the seeker debugging, debugging is very difficult, and the development cost will increase, and 0 It is unnecessary to meet the requirements of 3% or 5% within ~3Hz, mainly because the missile disturbance frequency band is not so wide, and the index is not necessary to be so high

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