Arnaud Miège's Web Site: Home > Recent Projects at QinetiQ
I work as a project engineer at QinetiQ, Land Vehicle Systems (now called Mounted Systems), in Farnborough, UK. QinetiQ, formerly an agency of the Ministry of Defence (MOD), is Europe's largest science and technology organisation, employing over 9,000 staff across the U.K. and U.S.A. QinetiQ's pioneering research and development includes the invention of liquid-crystal displays (LCDs), carbon fibre, the technology for flat-panel speakers, infra-red sensors and microwave radar. My areas of technical expertise include vehicle and tyre modelling and simulation. I also have some control system design experience gained through my Ph.D. at Cambridge University, as well as some practical experience with experimental vehicles. I work primarily on automotive related projects. Here is an overview of some of my recent work:
Design in MATLAB®/Simulink® of an off-road course profile based on a chosen Power Spectral Density and coherence function to meet a set of requirements. Modelling in TruckSim® of a number of vehicles on this new course to assess its suitability for evaluating the ride performance of wheeled vehicles.
Modelling the powertrain performance of various wheeled and tracked vehicles across various terrains to predict the maximum speed on gradients of these vehicles. The rolling resistance and traction coefficients were changed to represent the different terrains.
Technical appraisal of an armoured wheeled vehicle to highlight potential areas of concern that may have an effect on the vehicle's operation, performance and safety due to the added mass of the armour.
Modelling the powertrain performance of various wheeled vehicles using an in-house Excel-based model to select the best candidate for the procurement requirements .
Modelling in TruckSim® a tractor semi-trailer combination with a novel hovercraft technology on the trailer unit in order to quantify the effect of lift on handling and braking performance.
Modelling in TruckSim® the ride performance of wheeledd vehicle variants over off-road terrains in order to assess the effect of changing the unsprung mass to represent different hybrid technology implementations. The frequency analysis was conducted in MATLAB®;
Modelling in TruckSim® front axle braking while maintaining full throttle power on wheeled vehicles with different powertrain configurations (FWD, RWD and 4WD);
Investigating the modelling tools and techniques available to model noise and vibration for a range of wheeled and tracked vehicles. The modelling approaches considered included multibody dynamics software (such as MSC.ADAMS® and LMS Virtual.Lab), finite element analysis and statistical energy analysis;
Modelling the effect of changing the engine (from Euro 3 to Euro 4) in a fleet of wheeled support vehicles on powertrain performance using an in-house Excel-based model;
Modelling a gear change event in a novel dog clutch mechanism using MSC.ADAMS®;
Evaluating through simulations different hybrid technologies for vehicle applications;
Evaluating through simulations different battery technologies for hybrid vehicles;
Developing and validating against trial data an articulated wheeled vehicle model to develop performance-base standards. The various tools and software used included in MATLAB®/Simulink®, Microsoft® Excel, Trucksim® and MSC.ADAMS®. Based on the modelling and trial results, as well as user requirements and relevant legislation, developing the actual performance-based standards to be met by the associated future fleet of vehicles.
Integrating the knowledge gained from QinetiQ's membership of the Cambridge Vehicle Dynamics Consortium for the MOD.