Quantitative Assessment of Dynamic Stability Characteristics for Jet Transport in Sudden Plunging Motion

In this paper, we present a monitoring program of loss control prevention for airlines to enhance aviation safety and operational efficiency. The assessments dynamic stability characteristics based on the approaches oscillatory motion eigenvalue modes jet transport aircraft response sudden plunging motions are demonstrated. A twin-jet encountering severe clear-air turbulence in transonic flight during descending phase was examined as study case. results with abrupt changes attitude gravitational acceleration (i.e., normal load factor) provided. Development required thrust aerodynamic models data mining fuzzy logic modeling techniques carried out. derivatives extracted from these were then used variations motion. utilized estimate nonlinear unsteady aerodynamics while performing numerical integration equations. eigenvalues all obtained time integration. positive real part is indicate unstable easily judged by values or negative. quantitative assessment method an innovation examine possible mitigation concepts accident promote understanding responses aircraft.