| 摘要 |
PCT No. PCT/SE95/01601 Sec. 371 Date Jun. 27, 1997 Sec. 102(e) Date Jun. 27, 1997 PCT Filed Dec. 29, 1995 PCT Pub. No. WO96/21134 PCT Pub. Date Jul. 11, 1996An aerial towed hit detector used together with a sleeve target can obtain an oscillatory movement in the roll angular direction because of the small aerodynamic stability of the target. For determining the path or the miss distance of a projectile passing by the target and the hit detector, the position of the hit detector in the air is measured for allowing a compensation to be made in the determination of hit parameters of the projectile. In the determination of the position of the hit indicator tow accelerometers are used measuring the acceleration laterally or in a tangential direction. One accelerometer is attached to the hit detector and one to the tow rod. By forming the difference of the signals from the accelerometers and integrating the difference signal in two steps information of the angular position of the hit indicator is obtained. This calculation is made in a microprocessor for those times when pressure waves from projectiles hit the hit detector.
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