電波ホーミングの誘導誤差距離に及ぼす非ガウスクラッタの影響

概要

論文の詳細を見る
The miss distace in a radar homing system is caused by the various noises. Among them, the main lobe clutter at a specific time affects significantly. In the analysis of this effect so far, the clutter was assumed to have a Gaussian amplitude distribution. In recent observations, however, it was found that the distribution is non-Gaussian. In this paper, analyses are made under the assumption that the clutter obeys a Weibull distribution. First, it was clarified by the measurement of variaous backgrounds that the shape parameter often takes a value of between 0.5 and 1.0. To incorporate the clutter into the system model, the equivalent gain of a lateral accerleration limiter in the system must be obtained. This was accomplished with the introduction of the complex Weibull probability. By using this gain in the covariance analysis technique, the propagation of the range standard deviation between missile and target is calculated. These results showed that the shape parameter of 0.5 to 1.0 causes an approximtely 20 percent larger miss distance compared with a Rayleigh distribution. The results were confirmed to be within 95 percent confidence level with the Monte-Carlo simulation. Some considerations are made for reducing the adverse effect of the clutter, however, definite solutions do not seem to exist. Further investigation must be necessary.
日本シミュレーション学会の論文
1995-03-15