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Study of release process of the aeronautic towed decoy
Pages: 1-5
Year: Issue:  1
Journal: Aircraft Design

Keyword:  towed decoytowed cablereleaselumped-mass methoddynamic model;
Abstract: A mathematical-physical model of the aeronautic towed decoy system is build and its dynamic characteristics are studied. The lumped-mass method is applied to build the dynamic model of the cable,which dispersed as series of nodes connected by damping springs. Forces of the decoy are analyzed,and its model of six degrees of freedom is established. Conditions in which the cable and the decoy are coupled are considered in order to make the model more accurate. The dynamic characteristics are simulated during the decoy release. The shape and tension of the cable and attitude angles of the decoy are given and analyzed. The results show that,the maximum airspeed of the aircraft should be controlled during release to avoid the cable entering the exhaust jet of the aircraft. To avoid the phenomenon of "fi sh hook",the release direction should be almost parallel to the aircraft airspeed. The release rate of the decoy should be trapezoidal to reduce the maximum tension in the cable and the pitch moment of the decoy.
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