Heavy aircraft main landing gear tyres skid immediately after touchdown as result of the high slip ratio between the tyres and runway, which lead to tyre wear and smoke. In this paper, the tyre wear is modelled on the Archard theory using ANSYS mechanical transient, to reveal the wheel’s dynamic and the tyre tread wear. The wheel’s dynamic and the amount of wear are calculated for initially sta...

As long as total effort cannot be completely controlled, a more thorough understanding of fishers’ supply response decisions will be beneficial for fishery managers. In this paper, we present a model of fishers’ gear choice, which is empirically estimated on a panel of Swedish demersal trawlers. The approach allows for heterogeneity both in production technology and in risk preferences. Stochas...

Guidance and control of aircraft in the landing phase imposes extra pilot work loads, hence application of automatic landing control systems is of great importance. In this study automatic landing control systems are introduced and an optimal landing control system is designed. The control system performance criteria are based on minimum control effort. The designed system is simulated for a tr...

The paper presents an Abstract State Machine (ASM) specification of the Landing Gear System case study, and shows how the ASMETA framework can be used to support the modeling and analysis (validation and verification) activities for developing a rigorous and correct model in terms of ASMs. We exploit the two fundamental concepts of the ASM method, i.e., the notion of ground model and the refine...

The landing gear system is the dominant airframe noise source for most modern commercial aircraft during approach. This manuscript reports results from ALLEGRA (Advanced Low Noise Landing (Main and Nose) Gear Regional Aircraft) project. project assessed performance of several highly realistic low–noise technologies (LNTs) applied to a detailed full–scale nose (NLG) model in aeroacoustic wind–tu...

Landing gear is an essential part of aircraft. However, the components landing are susceptible to degradation over life their operation, which can result in shimmy effect occurring during take-off and landing. In order reduce unplanned flight disruptions increase availability aircraft, predictive maintenance (PdM) technique investigated this study. This paper presents a case study on implementa...