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7 post shaker
The 7 post shaker is a piece of test equipment used to perform technical analysis on race cars. By applying shaking forces the shaker can emulate banking loads, lateral load transfer, longitudinal weight transfer and ride height sensitive downforce to emulate specific racetracks.
==Uses==
The 7 post shaker is used for many vehicles in different driving conditions. Earlier versions were the 5 post shaker and the 4 post shaker. The 4 post shaker is commonly used by vehicle manufacturers to investigate squeaks and rattles. Manufacturers do not normally use a 7 post rig for road cars because these vehicles are not normally subject to the same aerodynamic effects as a race car operating at high speeds. This technology was first used in Formula 1 in the late 1990s, and is now also used by other series such as NASCAR and the Indy Racing League. NASCAR teams with 7 post rigs include Hendrick Motorsports, Richard Childress Racing, Chip Ganassi Racing, Furniture Row Racing, and Roush Fenway Racing. The car driven by Jeff Gordon is shown on a 7 post rig in this (video ).
Vehicle designers use the results of the testing on the 7 post shaker to adjust spring rates, shock valving and steering ratio to best suit conditions of a specific emulated track.〔 (Seven-Post Shaker Rig - Suspension Dynamics Machine - Circle Track )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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