Presentation Title

Suspension System Design and Analysis for Off-road Racing Conditions

Start Date

November 2016

End Date

November 2016

Location

HUB 302-21

Type of Presentation

Poster

Abstract

The Baja Society of Automotive Engineers (SAE) annual design competition requires teams to design and build an off-road vehicle to navigate unpredictable terrain. The suspension system must not fail while allowing the vehicle to maintain high speed. Within the Baja SAE environment the goals of the suspension are to maximize the maneuverability and minimize the weight. The designed suspension system maximizes its maneuverability with the combination of a short wheelbase and dual unequal-length A-arms in the front that allow a desired camber curve throughout the suspension travel to maintain maximum contact surface of the wheel at all times. The weight of the system is reduced by analyzing the yield strength of components such as control arm material and construction, hardware, brake caliper, and rotor combination. The suspension system computational design process uses the assistance of software such as Solidworks and Matlab. Solidworks is used to determine the geometry, provide system packaging such as the upright-hub assembly, Finite Element Analysis on individual components to determine strength and durability. The components are analyzed for static and dynamic loading scenarios that often cause failure during competition. Matlab is used to calculate the data taken from Solidworks to produce expected results such as calculating the turning radius from the Ackermann angles. In addition, Optimum Kinematics is used to validate the expected results as calculated from Solidworks and Matlab for example, body-roll. Optimum Kinematics also allows several suspension design iterations to be compared under various conditions such as roll and acceleration. Finally, these expected computational design results will be validated with testing after the vehicle is manufactured and operational. Based on suspension loading scenarios, computational analysis, and empirical testing, this method seeks to create an agile and sturdy suspension design for the Baja SAE Collegiate Competition.

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Nov 12th, 1:00 PM Nov 12th, 2:00 PM

Suspension System Design and Analysis for Off-road Racing Conditions

HUB 302-21

The Baja Society of Automotive Engineers (SAE) annual design competition requires teams to design and build an off-road vehicle to navigate unpredictable terrain. The suspension system must not fail while allowing the vehicle to maintain high speed. Within the Baja SAE environment the goals of the suspension are to maximize the maneuverability and minimize the weight. The designed suspension system maximizes its maneuverability with the combination of a short wheelbase and dual unequal-length A-arms in the front that allow a desired camber curve throughout the suspension travel to maintain maximum contact surface of the wheel at all times. The weight of the system is reduced by analyzing the yield strength of components such as control arm material and construction, hardware, brake caliper, and rotor combination. The suspension system computational design process uses the assistance of software such as Solidworks and Matlab. Solidworks is used to determine the geometry, provide system packaging such as the upright-hub assembly, Finite Element Analysis on individual components to determine strength and durability. The components are analyzed for static and dynamic loading scenarios that often cause failure during competition. Matlab is used to calculate the data taken from Solidworks to produce expected results such as calculating the turning radius from the Ackermann angles. In addition, Optimum Kinematics is used to validate the expected results as calculated from Solidworks and Matlab for example, body-roll. Optimum Kinematics also allows several suspension design iterations to be compared under various conditions such as roll and acceleration. Finally, these expected computational design results will be validated with testing after the vehicle is manufactured and operational. Based on suspension loading scenarios, computational analysis, and empirical testing, this method seeks to create an agile and sturdy suspension design for the Baja SAE Collegiate Competition.