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Technical Papers
SAE 2003-01-3363
Development of a Dynamic Model of an Air-ride Seat for On-highway Trucks
Louis V. Inendino, Mark G. Strauss and Jure Medanic
In this paper, a two-degree-of-freedom (DOF) dynamic model of an on-highway truck seat is created using the Simulink simulation program from MATLAB. Engineering properties of the seat used in the model are measured in the laboratory, obtained from seat component manufacturers, or estimated using engineering judgment. Modeled parameters include: air spring force, damper force, end-stop force, cushion force, seat belt force, driver mass, and cab vertical oscillations due to road disturbances. The model is developed to facilitate seat design as a means of increasing the comfort level that on-highway truck drivers face while carrying out their everyday tasks.
Field testing of the seat is performed in order to validate the model. National Instruments hardware and Labview software are used for the data acquisition. Cab floor acceleration and seat height relative to the cab floor are measured and collected while the truck in which the seat is mounted is traveling over several different types of roads. Cab floor displacements are formulated from cab floor acceleration signals using Fourier methods and integration. These filtered cab floor displacements serve as inputs to the two-DOF model.
Model outputs are compared with measured seat outputs using the power spectra of the seat height relative to the cab floor. Initially, overall agreement of model outputs to measured seat outputs is encouraging. There is better agreement observed at frequencies of about 2.5Hz and higher. Seat model parameters are adjusted from the original model as an attempt to improve the agreement between model and actual measured outputs. It is seen that, at least for inputs from certain roads, the model can be improved by changing some of its parameters.
Copyright 2003 Society of Automotive Engineers, Inc.
For a complete copy of this paper, contact:
Society of Automotive Engineers
400 Commonwealth Drive
Warrendale, PA 15096-0001
(724) 776-4841 (Phone)
(724) 776-5760 (Fax)
SAE 2006-01-3479
Evaluation of the SIMON Tractor-Semitrailer Model for Steady State and Transient Handling
SAE 2006-01-3557
Usable Models for Free and Forced Cooling of Commercial Vehicle Drum Brakes
SAE 2006-01-3556
Comparison of Established Heavy Brake Heating / Cooling Models with HVE Brake Designer in a Real Mountain Accident
RF2005-01
Commercial Vehicle Onboard Electronics - Global Positioning Systems, Engine Control Modules and Safety Systems and Devices
IMECE2004-59566
Analysis of a Common Cause Hypothesis in a Forensic Product Defect Analysis
SAE 2004-01-2717
Safety Concerns in Automatic Control of Heavy-Duty Articulated Vehicles
SAE 2003-01-3393
Numerical Methods for Evaluating ECM Data in Accident Reconstruction and Vehicle Dynamics
SAE 2003-01-3363
Development of a Dynamic Model of an Air-ride Seat for On-highway Trucks
SAE 2003-01-3419
Simulation of Intelligent Convoy with Autonomous Articulated Commercial Vehicles
SAE 2002-01-3104
Factors Affecting the Friction Coefficients Between Wooden and Plastic Pallets and the Wooden Floor Of A Van-type Semi-trailer
SAE 2002-01-1566
Overview of Carat-4, a Multi-body Simulation and Collision Modeling Program
SAE 2001-01-2755
Factors Affecting the Friction Coefficients Between Wooden Pallets and the Wooden Floor of a Van-type Semi-trailer
SAE 2001-01-2733
Feasibility of Modifying an Existing Semi-Trailer Air Suspension Into An Anti-Rollover System
SAE 2000-01-3476
Fluid Load Analysis Within the Static Roll Model
SAE 2000-01-1616
Utilizing a Genetic Algorithm to Optimize Vehicle Simulation Trajectories: Determining Initial Velocity of a Vehicle in Yaw
RF2000-01
The Post-Kumho Exclusion of a Traffic Accident Reconstruction Expert
SAE 1999-01-3782
A Prototype Computer Based Test System to Test Commercial Vehicle Air Brake Systems: Application and Test Results
SAE 1999-01-3732
Dynamics and Roll Stability of a Loaded Class 8 Tractor-Livestock Semi-Trailer
SAE 973261
Prediction of Steady State Roll Threshold for Loaded Flat Bed Trailers - Theory and Calculation
SAE 971033
Ventilated Brake Rotor Air Flow Investigation
SAE 900106
Skidmark Signatures of ABS-Equipped Passenger Cars
SAE 880066
Combining Scene Data with Trajectory Information for Effective Accident Simulation
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