Changes In Pilot Control Behaviour Across Stewart Platform Motion Systems
Download Changes In Pilot Control Behaviour Across Stewart Platform Motion Systems PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Changes In Pilot Control Behaviour Across Stewart Platform Motion Systems book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages.
Changes in Pilot Control Behaviour Across Stewart Platform Motion Systems
Author: Frank M. Nieuwenhuizen
language: en
Publisher: Logos Verlag Berlin
Release Date: 2012
Flight simulators provide an effective, efficient, and safe environment for practising flight-critical manoeuvres without requiring a real aircraft. In general, high-performance full flight simulators are used for training tasks that require simulator motion, although low-cost motion systems have been proposed for certain training tasks that only require limited motion cues. These systems have shorter stroke actuators, lower bandwidth, and higher motion noise. The influence of these characteristics on pilot perception and control behaviour is unknown. In this thesis, this is investigated by simulating a model of a simulator with limited capabilities on a high-end simulator. The simulator limitations, which consist of a platform filter, time delay, and noise characteristics, can then be removed one by one and their effect on control behaviour studied in isolation. Pilot perception and control behaviour was identified in an experimental closed-loop control task. The time delay and noise characteristics of the simulators did not have an effect on pilot behaviour. However, it was found that the bandwidth of the motion system had a significant effect on performance and control behaviour. Results indicate that the motion cues were barely used at all in conditions with a low bandwidth, and that participants relied on the visual cues to perform the control task. The approach used in this thesis provided valuable insight into changes in pilot response dynamics that form the basis of observed changes in performance. The results demonstrated that simulator motion cues must be considered carefully in piloted control tasks in simulators and that measured results depend on simulator characteristics as pilots adapt their control behaviour to the available cues.
Measuring, modelling and minimizing perceived motion incongruence for vehicle motion simulation
Author: Diane Cleij
language: en
Publisher: Logos Verlag Berlin GmbH
Release Date: 2020-01-28
Humans always wanted to go faster and higher than their own legs could carry them. This led them to invent numerous types of vehicles to move fast over land, water and air. As training how to handle such vehicles and testing new developments can be dangerous and costly, vehicle motion simulators were invented. Motion-based simulators in particular, combine visual and physical motion cues to provide occupants with a feeling of being in the real vehicle. While visual cues are generally not limited in amplitude, physical cues certainly are, due to the limited simulator motion space. A motion cueing algorithm (MCA) is used to map the vehicle motions onto the simulator motion space. This mapping inherently creates mismatches between the visual and physical motion cues. Due to imperfections in the human perceptual system, not all visual/physical cueing mismatches are perceived. However, if a mismatch is perceived, it can impair the simulation realism and even cause simulator sickness. For MCA design, a good understanding of when mismatches are perceived, and ways to prevent these from occurring, are therefore essential. In this thesis a data-driven approach, using continuous subjective measures of the time-varying Perceived Motion Incongruence (PMI), is adopted. PMI in this case refers to the effect that perceived mismatches between visual and physical motion cues have on the resulting simulator realism. The main goal of this thesis was to develop an MCA-independent off-line prediction method for time-varying PMI during vehicle motion simulation, with the aim of improving motion cueing quality. To this end, a complete roadmap, describing how to measure and model PMI and how to apply such models to predict and minimize PMI in motion simulations is presented. Results from several human-in-the-loop experiments are used to demonstrate the potential of this novel approach.
The Role of Visual Cues in Body Size Estimation
Author: Anne Thaler
language: en
Publisher: Logos Verlag Berlin GmbH
Release Date: 2019-12-15
Our body is central to what we define as our self. The mental representation of our physical appearance, often called body image, can have a great influence on our psychological health. Given the increase in body mass index worldwide and the societal pressure to conform to body ideals, it is important to gain a better understanding of the nature of body representations and factors that play a role in body size estimation tasks. This doctoral thesis takes a multifaceted approach for investigating the role of different visual cues in the estimation of own body size and shape by using a variety of experimental methods and novel state-of-the-art computer graphics methods. Two visual cues were considered: visual perspective and identity cues in the visual appearance of a body (shape, and color-information), as well as their interactions with own body size and gender. High ecological validity was achieved by testing body size estimation in natural settings, when looking into a mirror, and by generating biometrically plausible virtual bodies based on 3D body scans and statistical body models, and simulating real-world scenarios in immersive virtual reality.