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• W2467999216 abstract "This thesis describes the development and evaluation of a competitor vehicle model for Volvo CarsCorporation's moving base driving simulator. Vehicle simulations are important when aiming fordecreased development time within the vehicle industry. Simulations help the engineers to front-loadprojects, thereby improving efficiency and product quality. To remain competitive it is essential toknow the industry's state of the art technology. One commonly used method is competitor analysis.The thesis delivers a method of how to measure a competitor's vehicle in order to create a vehiclemodel that can be tested objectively in VI-CarRealTime as well as subjectively in a driving simulator.This gives the opportunity to save the competitor vehicle in a database and perform tests even ifthe physical vehicle is no longer available. The thesis focuses mainly on capturing the lateral tyreand steering characteristics of the competitor vehicle with the main priority to mimic the full vehiclebehaviour while minimising additional requirements needed compared to a standard measuring. It isfavourable to separate the different system in the full vehicle model in order to facilitate the vehicleanalysis on component level. Two methods are presented and carried out. One named MeasurementBased Method that requires measured tie-rod forces using strain gauge sensors on the tie-rods asan additional measuring equipment. The second method named Estimation Based Method is usingthe standard measuring equipment but instead requires a Brush Tyre Model to correlate lateral tyrecharacteristics to aligning torque. The advantage of knowing the tie-rod forces is that tyres andthe steering system can be completely decoupled from each other which gives higher accuracy oncomponent level. The tyre model is optimised so that the simulated vehicle shows the same responseas the measured vehicle in a series of manoeuvres. The lateral tyre parameters are assumed to befound when the vehicle model is achieving the same yaw rate and lateral acceleration as for thephysical vehicle in an identical manoeuvre. A steering algorithm is designed to imitate the behaviourof vehicle's power steering system by estimating the relation between rack force and steering wheeltorque. The resulting steering algorithm is tuned to simulate the wanted steering system by adjustingdamping and friction parameters together with a base torque given by a velocity versus rack forcedependent look-up table. Objective evaluations show good correlation for low transient manoeuvres.However, at higher transients the tuned models differentiated more from the measured data. TheMeasured Based Method was thought to have higher accuracy when evaluating subjectively whichresulted in it to become the favourable method. Further work needs to be carried out on both thesteering system and the tyre optimisation in order to have an established method." @default.
• W2467999216 created "2016-07-22" @default.
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• W2467999216 date "2016-01-01" @default.
• W2467999216 modified "2023-09-24" @default.
• W2467999216 title "Modelling For Competitor Vehicle Analysis" @default.
• W2467999216 hasPublicationYear "2016" @default.
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