CAJ | 학술논문

飞行技术误差(FTE)与导航系统误差(NSE)是性能基导航(PBN)中总系统误差(TSE)的主要组成部分.性能基导航的实施需要对总系统误差进行航前预测以及航行中的短期动态预测.当飞行技术误差预测值与导航系统误差预测值的和大于PBN导航的规定值时,将无法运行PBN导航.因此,对于总系统误差的两个主要误差分量需要精确建模和透彻分析.采用LQG/LTR方法针对ARIC模型设计了多输入多输出纵向飞行控制系统,分析了在湍流扰动下进近飞行器对称面内的飞行技术误差.基于奇异值理论提出了对称面内飞行技术误差的映射函数以及边界估计模型.模型是基于对对称面内飞行技术误差成型机理的分析提出的,提供了一种基于成型机理的分析和估计方法,从而避免了昂贵试飞和单纯的数据拟合.基于真实数据的仿真验证了对称面内飞行技术误差的理论分析.研究同时揭示了当自动飞行控制系统(AFCS)接通时性能基导航中对称面内飞行技术误差部分由湍流扰动引致,且随湍流强度的增强而增大.
비행기술오차(FTE)여도항계통오차(NSE)시성능기도항(PBN)중총계통오차(TSE)적주요조성부분.성능기도항적실시수요대총계통오차진행항전예측이급항행중적단기동태예측.당비행기술오차예측치여도항계통오차예측치적화대우PBN도항적규정치시,장무법운행PBN도항.인차,대우총계통오차적량개주요오차분량수요정학건모화투철분석.채용LQG/LTR방법침대ARIC모형설계료다수입다수출종향비행공제계통,분석료재단류우동하진근비행기대칭면내적비행기술오차.기우기이치이론제출료대칭면내비행기술오차적영사함수이급변계고계모형.모형시기우대대칭면내비행기술오차성형궤리적분석제출적,제공료일충기우성형궤리적분석화고계방법,종이피면료앙귀시비화단순적수거의합.기우진실수거적방진험증료대칭면내비행기술오차적이론분석.연구동시게시료당자동비행공제계통(AFCS)접통시성능기도항중대칭면내비행기술오차부분유단류우동인치,차수단류강도적증강이증대.
In the performance based navigation (PBN),the flight technical error (FTE) and the navigation system error (NSE) are two main parts of total system error (TSE).The implementation of PBN requires pre-flight prediction and en-route short-term dynamical prediction of TSE.Once the sum of predicted FTE and NSE is greater than the specified PBN value,PBN cannot operate.Thus,it requires accurate modeling and thorough analysis of the two main contributors.Multiple-input multiple-output(MIMO) longitudinal flight control system of ARIC model is designed using the linear quadratic Gaussian and loop transfer recovery(LQG/LTR) method,and FTE in symmetrical plane of aircraft is analyzed during the turbulence disturbed approach.The error estimation mapping function of FTE in symmetrical plane and its bound estimation model are proposed based on the singular value theory.The model provides an approach based on the forming mechanism of FTE,rather than the costly flight test and the data fitting.Real-data based simulation validates the theoretical analysis of FTE in symmetrical plane.It also shows that FTE is partially caused by the turbulence fluctuation disturbance when the automatic flight control system (AFCS) is engaged and increases with escalating the environmental turbulence intensity.