Surrey Space Centre Department of Electrical and Electronic Engineering Faculty of Engineering and Physical Sciences Doctor of Philosophy

The atmospheric disturbances affect not only flying qualities of an airplane but also flight safety. According to flight records, most aircraft accidents occurred during final approach or landing. If the flight conditions are beyond the preset envelope, the automatic landing system (ALS) is disabled and the pilot takes over. An inexperienced pilot may not be able to guide the aircraft to a safe...

Runway length is usually a critical point in an airport system so, a great interest has been created for optimal use of this runway length. The most important factors in modeling of aircraft landing problem are time and cost while, the costs imposed on the system because of moving away from target times have different performances in terms of impact. In this paper, firstly, aircraft landing pro...

An understanding of how learners interact with eLearning tools and the relationship of different forms of interaction on subsequent learning outcomes is fundamental to improved learning outcomes as well as the effectiveness of eLearning tools. In this paper our main objective is to present methods to extract and analyse some crucial experiences and patterns, from an eLearning tool, that have si...

The launch-site effect, a systematic variation of within-word landing position as a function of launch-site distance, is among the most important oculomotor phenomena in reading. Here we show that the launch-site effect is strongly modulated in word skipping, a finding which is inconsistent with the view that the launch-site effect is caused by a saccadic-range error. We observe that distributi...

In this paper, we propose an autonomous precision landing method for an unmanned helicopter based on an on-board visual navigation system consisting of a single pan-tilting camera, off-the-shelf computer hardware and inertial sensors. Compared to existing methods, the system doesn’t depend on additional sensors (in particular not on GPS), offers a wide envelope of starting points for the autono...

The development and application of most present-day systems and control theory were spurred on by the need to resolve aerospace problems. This is roughly the problem of analyzing and designing flight control systems for tactical missiles or aircraft. The control laws used in current tactical missile or aircraft are mainly based on classical control design techniques. These control laws were dev...

Optimal trajectories for spacecraft guidance, be it during orbital transfers or landing sequences are often pre-computed on ground and used as nominal desired solutions later tracked by a secondary control system. Linearization of the dynamics around such nominal profiles allows to cancel the error during the actual navigation phase when the trajectory is executed. In this study, instead, we as...

Good balance is a pre-requisite for various activities of daily life and sports. Physiotherapists thus regularly assess train patient’s capacities. In order to interpret the test results unilateral tests, comparison with normative data common. patients who had an injury or surgery, performance injured leg often compared non-injured leg. Nevertheless, it remains unclear if differs between domina...