CAJ | 학술논문

某型号导弹发射过程中出现了振动突然放大的颤动现象。通过对振动信号的时域波形分析和频域谱分析，确认导弹局部振动的突然放大是一种自激振动现象。随后，采用相平面法通过对振动加速度信号进行频域积分得到发射过程中导弹局部的运动轨迹，并根据极限环理论证明了存在颤动现象。最后，论述了导弹局部的颤动现象是由于导弹与发射箱导轨之间的摩擦力所做正功大于负功而引起的，并通过涂抹较厚的润滑剂或润滑油消除了这种颤动现象。
모형호도탄발사과정중출현료진동돌연방대적전동현상。통과대진동신호적시역파형분석화빈역보분석，학인도탄국부진동적돌연방대시일충자격진동현상。수후，채용상평면법통과대진동가속도신호진행빈역적분득도발사과정중도탄국부적운동궤적，병근거겁한배이론증명료존재전동현상。최후，논술료도탄국부적전동현상시유우도탄여발사상도궤지간적마찰력소주정공대우부공이인기적，병통과도말교후적윤활제혹윤활유소제료저충전동현상。
Chattering of a missile happens during its launching.Through analyzing signals in time domain and frequency domain,it was shown that the misile's chattering is a self-excited vibration.The local motion trajectories of the missile during its launching were obtained through integrating its vibration acceleration in frequency domain with the phase plane method.Using the limit-cycle throry,it was proved that there is the chattering of the missile.Finally,it was found that the chattering of the missile is caused by the friction between the missile and the launch box's track,it can be eliminated through daubing thicker lubricants on the track.