engleski

Dynamic Simulation Modeling of Landing Aircraft

Dynamical model and numerical procedures for dynamic simulation of landing aircraft are presented. The model allows for dynamic response determination of landing and taxi of large transport aircraft for different touch-down parameters. The mathematical model and numerical procedures are based on non-linear dynamical model of landing aircraft, which is synthesised via modeling of aircraft structural systems using multibody dynamics approach. Mathematical model is derived as differential-algebraic (DAE) system and numerical tools are modularly shaped. The model includes non-smooth dynamics of landing gear oleo-pneumatic shock-absorber as well as hydraulic/thermodynamic processes. It also includes contact dynamics of non-linear tire and unilateral dynamics of assembly of nose gear elastic leg. Aerodynamic loads are estimated by considering aircraft various system configurations (landing gears in up and down position, the control surfaces in active/inactive modes). Efficient numerical integration methods and original procedures for MBS constraint stabilization are applied for determination of system dynamical response. On the basis of the presented model, dynamic simulations of landing cases of large transport aircraft were performed for various flight conditions and touch-down parameters.

Dynamics of Landing Aircraft; Multibody Model for Aircraft Dynamics; Non-linear Dynamics of Landing Gear; Shock Absorber Model

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