Contrary to the popular views, air travel has been the safest compared to other surface transportation (automobile & railroad) in terms of casualty of passengers. This is mainly due to the vigilant pursuit of safety margin in the design of Air Traffic Control and Navigation (ATCN) system. However, the rising demand of air travels requires us to review the safety factor affecting all phases of a...

Unmanned planetary landers to date have landed "blind"; that is, without the benefit of onboard landing hazard detection and avoidance systems. This constrains landing site selection to very benign terrain, which in turn constrains the scientific agenda of missions. The state of the art Entry, Descent, and Landing (EDL) technology can land a spacecraft on Mars somewhere within a 20-100km landin...

-----------------------------------------------------------------Abstract--------------------------------------------------------This work mainly focuses on automatic landing control methods for the jumbo jet. The six degree-of-freedom nonlinear model of Boeing707 has been established, using classical control method, gliding beam guidance law, lateral beam guidance law, autoflare guidance law a...

Based on heavy aircraft main landing gear tires touchdown skidding process, patents have been registered since the 1940s to improve tire safety, decrease the substantial wear and smoke that results from every landing by spinning the rear wheels before touchdown. A single wheel has been modeled as a mass-spring-damper system using ANSYS mechanical transient simulation to analyze static and pre-r...

The ability to automate forced landings in an emergency such as engine failure is an essential ability to improve the safety of Unmanned Aerial Vehicles operating in General Aviation airspace. By using active vision to detect safe landing zones below the aircraft, the reliability and safety of such systems is vastly improved by gathering up-to-the-minute information about the ground environment...

In this paper a hazard detection and landing site selection algorithm, based on a single, visible light, camera acquisition, processed by Artificial Neural Networks (ANNs), is presented. The system is sufficiently light to run onboard a spacecraft during the landing phase of a planetary exploration mission. Unsafe terrain items are detected and arranged in a hazard map, exploited to select the ...

Photoclinometry was used to analyze the small-scale roughness of areas that fall within the proposed Mars Exploration Rover (MER) 2003 landing ellipses. The landing ellipses presented in this study were those in Athabasca Valles, Elysium Planitia, Eos Chasma, Gusev Crater, Isidis Planitia, Melas Chasma, and Meridiani Planum. We were able to constrain surface slopes on length scales comparable t...

background: single leg drop landing is one of the common sport activities that have greater likelihood of leading to traumatic oflower extremity. however, there is limited understanding of biomechanics of this maneuver. hence, this study aimed to compare the activities of lower limb muscles during pre- and post phases of single leg drop landing. methods: this semi-experimental research of 13 ph...

Abstract Approach/Landing is the phase of most accidents occur to endanger civil aircraft safety. CAT III autoland operation can improve safety and reliability when approach landing in bad weather conditions, reduce pilot’s working loads, so control law design an important task advanced flight system research. However, related researches are requirement based rather scenario based. Firstly, art...