Development of a Passenger Vehicle Seat Center-of-Gravity Measuring Device 2020-01-1061
A machine has been developed to measure the center-of-gravity (CG) location of a seat. This machine uses a system of pivots, a yaw bearing and two sensors to get the X, Y and Z CG of the seat. Test object mass is measured separately on a scale. A stable pendulum arrangement is used to get the CG location. Governing equations for the machine are shown in the paper and a typical test procedure is discussed. An error analysis is discussed and shows the requisite accuracy of platform angle, geometric dimensions, seat weight and applied weight in order to achieve the desired 3 mm accuracy target. A full system statistical analysis demonstrates that all X and Y CG locations, when compared with theoretical values, are off by less than 1 mm and well within the 3 mm accuracy target. For Z CG, the errors were shown to be 3.3 mm or lower with 95 percent confidence.
Citation: Zagorski, S., Andreatta, D., and Heydinger, G., "Development of a Passenger Vehicle Seat Center-of-Gravity Measuring Device," SAE Technical Paper 2020-01-1061, 2020, https://doi.org/10.4271/2020-01-1061. Download Citation
Author(s):
Scott Zagorski, Dale Andreatta, Gary Heydinger
Affiliated:
SEA, Ltd.
Pages: 9
Event:
WCX SAE World Congress Experience
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Statistical analysis
Test procedures
Center of gravity (CG)
Seats and seating
Yaw
Bearings
Sensors and actuators
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