# 6736 / Ride comfort comparison between 4-poster and straight line driving simulations Title: Ride comfort comparison between 4-poster and straight line driving simulations Authors: Cor-Jacques Kat and Schalk Els Abstract: Difference thresholds of whole-body vibration is important to determine perceptibility of changes in a vehicle’s dynamics. Difference thresholds can be used to guide ride comfort improvements. Difference thresholds have been estimated for vertical and multi-axial seat vibration in laboratory settings. It is postulated that estimated difference thresholds in a laboratory setting should be applicable to real world driving conditions given that the stimuli (vibration, noise, visuals, cognitive load, etc.) are similar. This paper considers the stimulus associated with the vehicle’s dynamic response i.e. vibration. The vibration stimulus characteristic of a vehicle on a 4-poster test rig and straight line driving is investigated through simulation. A validated non-linear SUV vehicle model is simulated on a 4-poster test rig and driven in a straight line over road profiles that range from on- to off-road conditions. Each corner of the 4-poster is driven by the vertical road profile associated with that corner. The resulting translational and rotational vibration for all three axes at the driver position make up the vibration stimulus. Based on the level of agreement of the vibration stimulus between the 4-poster and straight line driving, some indication of the applicability of difference thresholds estimated on a 4-poster can be obtained. Order the full paper: ISTVS members: receive three papers per year as part of your membership via the ISTVS Member Portal: --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://2023.istvs.org/submissions/papers/6736.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.