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...

There is a need to design new, lighter aircraft structures, which has direct impact on the safety and costs of maintenance. One basic parts an ites landing gear, whose main functions are enable taxiing, safe landing, take-off, assist remainder ground operations. Landing gear failures usually related metallurgy, processing, environment, design, causes overload. These conditions that can be preve...

This paper contains numerical analysis of brake system for heavy (mass m=6400[kg]) transport car. Analysis was performed in order to correct existing non optimal brakes in mentioned car. Analysis was based on results of the brake system dynamic tests made in Landing Gear Laboratory Institute of Aviation in Warsaw, Poland. Authors describe analytical process which led to generate results for new...

Landing gear integration is one of the more fundamental aspects of aircraft design. The design and integration process encompasses numerous engineering disciplines, e.g., structures, weights, runway design, and economics. Although the design process is well-documented, it appears not to have been automated for uses in multidisciplinary design optimization (MDO) procedures. The process remains a...

Formal specifications are widely used in the development of safety critical systems, as the Sensor Voting Module of the Landing Gear System. However, the conformance relationship between the formal specification and the concrete implementation must be checked. In this paper, we show a technique to formally link a Java class with its Abstract State Machine formal specification, and two approache...

It is natural to rely on experiences from the aviation industry when developing safety-critical systems for automotive applications. In the aviation industry for several decades programmable systems have been used for flight control, aircraft engine control, landing gear control etc.. The safety and reliability requirements of these systems are comparable with steer-by-wire or brake-by-wire sys...

The shimmy phenomenon is a self-excited limit cycle oscillation occurring in many physical rolling systems, particularly in aircraft nose landing gears (NLG). This paper presents a new active damping controller developed in the context of the European DRESS (“Distributed and Redundant Electro-mechanical nose gear Steering System”) project for avoiding the shimmy oscillation. The controller base...

In the recent decades the number of spacecraft visiting asteroids and comets has risen. But only a few of them entered into an orbit of these small bodies and even only two had physical contact to the surface. The ESA mission Rosetta is on the way to meet the comet 67P/Churyumov-Gerasimenko in May 2014. Once in orbit the spacecraft will release the small lander Philae which is supposed to land ...