CAJ | 학술논문

研究了导弹非线性动态稳定性的分析方法.采用联立导弹的运动方程和流体动力学方程,建立了导弹绕平衡攻角作纵向俯仰振荡运动的数学模型,并用非线性动力学理论定性分析了模型的动态稳定性,得出影响导弹俯仰振荡运动稳定性的关键因素.以某返回舱为例,求解耦合方程,验证了方法的可靠性.针对某型号跳跃滑翔式导弹滑翔段中动态特性严峻的六个状态进行数值仿真,结果表明导弹在滑翔段是动态稳定的,方法用于导弹非线性稳定性的分析是可行的.
연구료도탄비선성동태은정성적분석방법.채용련립도탄적운동방정화류체동역학방정,건립료도탄요평형공각작종향부앙진탕운동적수학모형,병용비선성동역학이론정성분석료모형적동태은정성,득출영향도탄부앙진탕운동은정성적관건인소.이모반회창위례,구해우합방정,험증료방법적가고성.침대모형호도약활상식도탄활상단중동태특성엄준적륙개상태진행수치방진,결과표명도탄재활상단시동태은정적,방법용우도탄비선성은정성적분석시가행적.
This paper aims to study the method of analyzing nonlinear dynamic stability of a missile.The mathematic model of a missile pitching around trim angle of attack is built by coupling movement equations of the missile with the fluid dynamic equations,and the nonlinear dynamic theory is used to analyze the dynamic stability of the model.The key factor of the pitching motion stability of a missile is given.At first a reentry vehicle is studied to valid the reliability of the method,then six seriously flight states in the gliding trajectory of a missile with wavy and gliding trajectory are simulated numerically.The results show that the missile is stable during gliding trajectory,and the method is reliable in analyzing the nonlinear dynamic stability of a missile.