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Author

Ronald B. Heusser

Bio: Ronald B. Heusser is an academic researcher. The author has contributed to research in topics: Brake. The author has an hindex of 1, co-authored 1 publications receiving 25 citations.
Topics: Brake

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Journal ArticleDOI
TL;DR: It is argued that a naturalistic braking response should not be thought of as a slow reaction to some single, researcher-defined "hazard onset", but instead as a relatively fast response to the visual looming cues that build up later on in the evolving traffic scenario.

118 citations

Journal ArticleDOI
TL;DR: A model-based diagnostic system based on a nonlinear model for predicting the pressure transients in the brake chamber that correlates the brake Chamber pressure to the treadle valve (brake application valve) plunger displacement and the pressure of the air supplied to the brake system is presented.
Abstract: The safe operation of vehicles on roads depends, among other things, on a properly functioning brake system. Air brake systems are widely used in commercial vehicles such as trucks, tractor-trailers, and buses. In these brake systems, compressed air is used as the energy transmitting medium to actuate the foundation brakes mounted on the axles. In this paper, a model-based diagnostic system for air brakes is presented. This diagnostic system is based on a nonlinear model for predicting the pressure transients in the brake chamber that correlates the brake chamber pressure to the treadle valve (brake application valve) plunger displacement and the pressure of the air supplied to the brake system. Leaks and "out-of-adjustment" of push rods are two prominent defects that affect the performance of the air brake system. Diagnostic schemes that will monitor the brake system for these defects will be presented and corroborated with experimental data obtained from the brake testing facility

71 citations

Journal ArticleDOI
01 Jan 2001
TL;DR: A mathematical model of an air brake chamber is developed and used to investigate parameter sensitivity and a method capable of indirectly determining brake stroke by examining air pressure data is formulated and its effectiveness is proven through simulation and testing.
Abstract: Continuing research in brake condition monitoring for vehicles equipped with air brakes considers the feasibility of using air pressure data to determine brake stroke, a vital parameter in determining the effectiveness of the total braking system. Recent statistics show there is an alarming number of vehicles operating with brakes that are out of adjustment even with the introduction and requirement of automatic slack adjustment in 1994. The importance of brake stroke information is thus highlighted. To address this problem, a mathematical model of an air brake chamber is developed and used to investigate parameter sensitivity. A method capable of indirectly determining brake stroke by examining air pressure data is formulated and its effectiveness is proven through simulation and testing.

23 citations

Journal Article
TL;DR: In this paper, the authors describe the results of experimental evaluation of longitudinal control algorithms for commercial heavy vehicles (CHVs) and present improved modeling of air brakes for CHVs, and novel nonlinear algorithms for the longitudinal control of CHVs without intervehicle communication.
Abstract: This report describes the results of experimental evaluation of longitudinal control algorithms for commercial heavy vehicles (CHVs). Given the problem of delays in the fuel and brake actuators of automated CHVs, the researchers present improved modeling of air brakes for CHVs, and novel nonlinear algorithms for the longitudinal control of CHVs without intervehicle communication. The significance of these results in terms of Intelligent Transportation Systems (ITS) deployment is that one of the major obstacles to autonomous vehicle following for CHVs has now been removed The authors also point out that adaptive cruise control can now be implemented in CHVs that are not equipped with Electronic Brake Systems.

23 citations

Journal Article
TL;DR: In this article, the authors focus on the design of longitudinal control algorithms for commercial heavy vehicles (CHVs) using nonlinear spacing policies, backstepping control design, and aggressive prediction schemes to deal with the presence of significant delays and saturations in the fuel and brake actuators.
Abstract: This report focuses on the design of longitudinal control algorithms for commercial heavy vehicles (CHVs). The algorithms use nonlinear spacing policies, backstepping control design, and aggressive prediction schemes to deal with the presence of significant delays and saturations in the fuel and brake actuators. The algorithms can also deal with delays both in the presence and in the absence of intervehicle communication. A by-product on this research is the development of two software packages, Platoon-Builder and TruckVis, for simulation and animation of CHV platoons. Additionally, another important result of this project is a new simplified framework for evaluating the longitudinal string stability properties of platoons of automated vehicles.

17 citations