Validation of the EDVSM 3-Dimensional Vehicle Simulator

Self Cite

Vehicle crashes often involve rollover. A vehicle rollover is a complex, 3-dimensional event that is quite difficult to model successfully. As a result, crash investigators often make simplifying assumptions that compromise the quality of the information learned from the analysis. Advances in vehicle simulation modeling have greatly reduced the amount of work required to perform rollover simulations. Rollover simulation holds promise as a tool to learn more about crashes involving rollover. This paper describes how the EDVSM simulation model calculates 3-dimensional forces and moments on the sprung mass (i.e., body exterior) and how these forces and moments are integrated into the equations of motion. The paper also provides some examples of the use of rollover simulation. Finally, the paper addresses the practical and theoretical limitations of rollover simulation as a tool for routine reconstruction of on-road and off-road crashes. Evidence Analysis Numerous researchers have presented papers describing how to interpret the crash site and vehicle-related artifacts from rollover crashes. Orlowski [3], Martinez [4] and Marine [5] provide examples of such research. A discussion of maneuvers leading to rollover and procedures for testing rollover propensity are also presented.

“…Day [2] developed a vehicle dynamic simulation model. Two rollover experiments were simulated as part of that model's validation.…”

Section: Simulationmentioning

confidence: 99%

“…A literature review is included to assess the current state of the art and findings of other researchers. The main component of the paper is an in-depth evaluation of the use of the EDVSM [2] vehicle simulation model for studying rollover crashes. The vehicle model assumptions are presented and evaluated.…”

mentioning

confidence: 99%

Applications and Limitations of 3-Dimensional Vehicle Rollover Simulation

Day¹,

Garvey²

2000

Self Cite

“…Human simulation models, passenger vehicle simulation models and commercial vehicle simulation models have been developed to model the proper physical/mathematical behavior for objects involved in a study. A passenger car design engineer may focus on the use of a validated passenger vehicle simulation model, such as EDVSM [4], while a commercial vehicle design engineer may focus on using a commercial vehicle model for heavy truck and articulated vehicle studies [5]. These simulation models have been validated against results from industry-recognized staged experiments and simulation models.…”

Section: Advancements In Simulation Technologymentioning

confidence: 99%

Vehicle Design Evaluation Using The Digital Proving Ground

Canova¹

2000

Recent advancements in three-dimensional digital terrain mapping and vehicle simulation technology present an opportunity to introduce "real-world feedback" early in the design process. Designers of suspension, braking, steering and safety systems can evaluate and optimize designs using computer simulation of a vehicle on the digital proving ground (DPG). A range of possible design behaviors can be identified and analyzed prior to expensive prototyping and testing. Even a series of specific test maneuvers may be evaluated prior to actual testing to ensure safety of the driver and prototype vehicle. As a result, the design process is more efficient and the use of the actual proving ground is more cost effective. This paper presents an overview of the use of the digital proving ground for vehicle design evaluation. Several examples of digital proving ground tests will be discussed. Digital 3-D models of a test track facility may be available from the construction of the grounds, or they can be created with laser measurement techniques, such as LIDAR. Tire-terrain contact patch simulation techniques provide for the use of validated physics models to study 3-D vehicle behavior undergoing simulated tests for handling, ride, braking compliance or other maneuvers.

“…Several HVE-compatible simulation models were developed at the time of HVE's introduction. These models included passenger car simulations (e.g., EDVSM [7,8]), commercial vehicle simulations (e.g., EDVDS [9,10]) and human occupant simulations (e.g., EDHIS [11]). Collision simulation models were also made available (e.g., EDSMAC4 [12,13]).…”

mentioning

confidence: 99%

SIMON: A New Vehicle Simulation Model for Vehicle Design and Safety Research

Day¹,

Roberts²,

York³

2001

Self Cite

SIMON is a new vehicle dynamic simulation model. Applications for SIMON include single-and multi-unit vehicle handling simulation in severe limit maneuvers (including rollovers) and 3-dimensional environments. Applications also include vehicle-to-vehicle and vehicle-to-barrier collisions. This paper provides the technical background for the SIMON engineering model. The 3-dimensional equations of motion used by the model are presented and explained in detail. The calculations for suspension, tire, collision, aerodynamic and inter-vehicle connection forces and moments are also developed. The integration of features available in the HVE Simulation Environment, such as DyMESH, the Driver Model, Brake Designer and Steer Degree of Freedom, is also explained. Finally, assumptions and limitations of the model are presented. VEHICLE SIMULATION has many uses in the vehicle design and safety industries. Applications include vehicle design (suspension modeling, vehicle-tire system modeling and brake system modeling), virtual prototyping and compliance testing (ISO braking and lane change maneuvers) and safety analysis (collision simulation and post-crash reconstruction of actual events). Advances in vehicle modeling and computer hardware and software technology have made possible significant improvements in the field of vehicle simulation, resulting in newer and more powerful modeling capability. For example, simulations in the 1980's typically used 2-dimensional models employing three degrees of freedom. More sophisticated models existed, but were not often used because of their crude user interfaces.