火箭车水平助飞方案仿真及分析

地面辅助起飞是大起降质量差飞行器的重要起飞方式之一.地面辅助起飞系统起飞过程工况复杂,对飞行器的俯仰角响应提出了更高的要求,传统研究通常采用数值计算的方法,计算量大,过程繁琐,结果不直观.针对以上问题,以大型飞行器"霍托尔"为背景,采用分段式建模的方法建立地面辅助起飞系统的动力学模型,运用LMS Virtual.Lab Motion和MATLAB/Simulink进行联合仿真,并设计了控制俯仰角的PID回路.仿真结果表明,采用该方法得到的动力学模型合理,俯仰角控制系统能对俯仰角实现有效控制,起飞系统工作过程稳定.

The simulation and an alysis for an rocket sled aided takeoff scheme

For the large aircraft whose takeoff weight is far higher than the landing weight , the ground aided take-off system is a significant way to take off.The system has complicated operating conditions during taking off , so it puts forward higher requirements for the aircraft's pitch angle response.The traditional design method needs to build numerical computation model, which has a large calculating quantity and low efficiency.To solve these problems, this paper builds the dynamic model of the takeoff system using mechanical dynamics software LMS Virtual based on HOTOL, realizes co-simulation in Lab Motion and Matlab/Simulink.The dynamic model is divided into three phases to build and adopts PID control system to get better pitch angle response.The simula-tion result proves the dynamic model is reasonable and can achieve the effective control of the pitch angel.The work process of takeoff system is stable.