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Technical Paper

An Investigation of a Road-Vehicle Directional Behavior Under Steady-State Conditions

1991-09-01
911872
An investigation of a steady-state motor vehicle steering characteristics is presented. The parameters that influence the steering response (e.g., front/rear load distribution, front and rear tire cornering stiffnesses, and tire slip angles) are included in the analytical development of the tire-vehicle system. A set of handling diagrams are obtained which show the influence of the tire-vehicle system's design factors and motion variables on the vehicle steering behavior. These diagrams are obtained for both the linear and nonlinear ranges of tire operation. THE PURPOSE OF THIS PAPER is to investigate the steady-state directional response of a vehicle negotiating a turn at a constant forward speed. The vehicle model, as shown in Fig. 1 includes yaw and sideslip motions, but not body roll and load transfer.
Technical Paper

Development of a Slow-Acting Active Control Pneumatic Suspension System for Heavy Vehicle Applications

1991-11-01
912675
A slow-acting active control pneumatic suspension system for heavy truck applications is described. The first part of the paper discusses the control law strategy for an active pneumatic damping system concept. The second part descnies the application of the concept to a pneumatic sleeper bunk suspension system for on-highway trucks. The pneumatic suspension improves the quality of the sleeping environment for over-the-road truck drivers. Also, this concept has further application to a chassis suspension system to improve the truck's ride quality and handling characteristics.
Technical Paper

Modelling Linkages with Alternative C&E Simulation Methodologies

1991-09-01
911837
Alternative approaches for modelling linkages with several CAE simulation methodologies are discussed. The linkage design methodology is discussed in terms of the unique design features and capabilities that each CAE software package offers. The CAE software packages include: (1) ANSYS - a finite element analysis (FEA) program, (2) Integrated Mechanisms Program (IMP) - a multibody system analysis (MSA) program with its companion program, Geometric Modeling of Solids (GMOS) - a solid object geometric modelling program, (3) QUATTRO - a spreadsheet analysis program, and (4) special user-written analysis/animation programs. The linkage design methodology is discussed in terms of the unique design analysis features and capabilities that each CAE software simulation methodologies offers.
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