Acta Aeronautica et Astronautica Sinica ›› 2024, Vol. 45 ›› Issue (7): 229012-229012.

• Solid Mechanics and Vehicle Conceptual Design •

### Dynamic modeling and bifurcation analysis of agile turn of parafoil⁃missile system

Hongmiao ZHOU, Jianqiao YU, Yong YU()

1. School of Aerospace Engineering，Beijing Institute of Technology，Beijing 100081，China
• Received:2023-05-19 Revised:2023-07-13 Accepted:2023-08-08 Online:2024-04-15 Published:2023-10-31
• Contact: Yong YU E-mail:yuyong@bit.edu.cn
• Supported by:
Open Fund of Laboratory of Aerospace Servo Actuation and Transmission(LASAT-2022-A03-01)

Abstract:

Traditional projectiles are difficult to realize the quick， small-radius and large-angle agile turn due to the limitation of maneuverability. In this paper， a parafoil-missile system is proposed to realize agile turn by adding a suspending parafoil as the control surface on the missile. Firstly， a dynamic model of the parafoil-missile system composed of missile， parafoil， ropes and connection point is proposed， and the dynamic model of the 9-DOF parafoil-missile system is presented. The motion of the parafoil-missile system is compared and analyzed when the flap deflection is 0°， 25° and 50° through trajectory simulation in the longitudinal plane. The analysis results show that the parafoil-missile system can realize agile turn. By means of bifurcation analysis of the dynamic model of the parafoil-missile system， the bifurcation diagram of the system is studied when the flap deflection is different and the rigging angle is taken as the continuous variable parameter. The target stable equilibrium corresponding to the minimum turn radius and the maximum turn final speed of the missile to realize agile turn is obtained. The variation of the attractive region near the target stable equilibrium is analyzed. The trajectory simulation shows that the missile with a mass of 73 kg can achieve the minimum turn radius of 14.50 m and the minimum velocity loss of 20.4 m/s by selecting the flap deflection and rigging angle reasonably. The parafoil-missile system proposed can provide important reference to improving the performance of agile turn of traditional tactical missiles.

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