为准确预测航空拖曳诱饵系统能否干扰成功,建立了系统的物理数学模型并对其动态特性进行了仿真研究。应用集中质量法,将柔性拖曳缆绳离散为一系列由阻尼弹簧连接的节点,建立了缆绳的动态模型;对诱饵进行受力分析,建立了诱饵的六自由度模型;提出了缆绳与诱饵的耦合条件,使模型更加精确。分别对诱饵释放过程中,以及释放完成后载机机动时系统的动态特性进行了仿真研究,给出并分析了缆绳的形状、张力和诱饵的姿态角等参数的变化规律。结果表明:为避免出现“鱼钩”现象,应尽可能减小释放诱饵的初速度与载机空速的夹角;应按梯形速度释放诱饵,以使缆绳中拉力的最大值较小。释放完成后,应控制载机最大飞行速度,以避免缆绳进入载机的高温尾喷流区;载机作盘旋时,缆绳在载机的圆形轨迹之外,且载机飞行速率一定时,角速度越大,缆绳向外趋势越大,越有利于避开载机的尾喷流区。 In order to accurately predict the success or failure of aeronautic towed bait system, a physical mathematic model of the system was established and its dynamic characteristics were simulated. By using the method of mass concentration, the flexible towing cable is discretized into a series of nodes connected by damping springs, and the dynamic model of the cable is established. For the force analysis of the decoy, a six-degree-of-freedom model of the decoy is established. The coupling between the cable and the decoy is proposed Conditions make the model more accurate. The dynamic characteristics of the system during the release of the bait and after the release of the carrier are simulated respectively. The variation of the parameters such as the shape and tension of the cable and the attitude angle of the bait are given and analyzed. The results show that to avoid the phenomenon of “fish hook”, the angle between the initial speed of releasing bait and the space velocity of the carrier should be reduced as much as possible. The bait should be released at the trapezoidal speed so that the maximum pulling force in the cable is smaller . After the release is completed, the maximum flight speed of the aircraft should be controlled so as to prevent the cable from entering the high-temperature tail jet zone of the aircraft. When the aircraft circling, the cable is outside the circular locus of the aircraft and the flight speed of the aircraft is certain, The greater the angular velocity, the greater the tendency of the cable outward, the more conducive to avoiding the aircraft jet tail zone.