火箭拖拽布撒网系统建模与动力学分析

布撒网系统利用火箭拖拽将网体布设至目标区域、完成雷区清障任务，研究其展开动力学过程，对系统设计有着重要的理论指导意义。基于刚体动力学及多体系统动力学中的集中质量方法，分别建立了火箭及柔性布撒网块的三维动力学模型，给出了系统动力学方程。利用4阶 Runge-Kutta法解算系统动力学方程，通过数值模拟计算分析了布撒网飞行布设准确性的影响参数。通过集中质量模型与多刚体模型对比，分析二者仿真结果中的火箭弹道、质心速度和俯仰角等关键动力学参数，研究了火箭拖拽布撒网系统的基本飞行动力学特性，得出集中质量模型的准确性更高。根据工程实际研制出火箭拖拽布撒网系统的试验样机，并完成了样机的场地飞行试验。结果表明：数值计算与试验结果吻合良好，系统布设到位率达到90%以上。

Modeling and Dynamic Analysis of a Rocket Towed Net System

The complex dynamical behaviors of rocket-towed net system are analyzed for system design. A three-dimensional model consisting of a rigid rocket model and a lumped mass net model is built based on the aerodynamics theory. The rocket towed net system model is solved by the fourth-order Runge-Kutta method in simulation. The proposed lumped mass model is compared with a rigid multibody model, and the flight dynamics characteristics of rocket towed net system are studied by analyzing the center of mass trajectory, velocity, and pitch angle of rocket in the experimental results. The flying test of an experimental system prototype was conducted. Simulated and experimental results show that the desployed distance accuracy of rocket towed net system is about 90% of the system length.