飞行器线性模型提取方法研究

Research on the Method of Building Linear Model for Flight Vehicle

飞行器线性模型是制导与控制系统设计的基础,传统建模方法是利用公式推导,求解力和力矩的导数,确定小扰动方程的系数。文中从工程实际出发,提出了一种基于飞行器非线性模型利用配平系统直接提取飞行器线性模型的新方法。介绍了该方法的原理和实现技术,与传统建模方法大不相同,大大提高了工作效率。

The linear model of flight vehicle is the base of GNC system design. Traditional method use formulary to deduce the derivatives of force and torque, and calculate the coefficients of small perturbation equation. A new nonlinear model based method of building linear model is presented in this paper. The method use trim system to achieve trim state and directly obtain the linear model from nonlinear model. The principle and implementation technology of the method are given in this paper. The new method is different from traditional method and improves work efficiency greatly.