Centreline Deviation Testing System

Manufacturers need to test the ability of their vehicles to track in a straight line, to make sure that the vehicle does not 'pull' to the left or right.

The ability to track in a straight line also needs to be verified under the influence of external conditions such as:

• Side winds.
• Suspension geometry errors.

The Racelogic Centre Line Deviation Software helps measure this accurately.

In order to establish the vehicle heading to base the deviation calculation on, data is sampled in the short time before the centre line deviation test. This means that the test engineer can drive in any direction accross the test pad,
as long as he vehicle is kept in a straight line before letting go of the steering wheel.

This is useful for different proving ground layouts, and means that tests can take place in a variety of locations. To maintain accuracy, any runs in which the heading before the start of the test was not within user-defined tolerances during the averaging period are highlighted.

Test Procedure Example

1. The test driver sets the start or end line and centreline distance

2. Test driver proceeds to the start position, attempting to maintain a constant heading

3. The centreline is calculated during the averaging period (if the deviation is too high the test is aborted)

4. The centre line and start speed are then updated on the screen, the status displays 'test started' and the software beeps

5. During the test the centre line distance, centre line deviation, end speed, and average speed are updated every sample and shown in the live window

6. The tests ends on a GPS end line or pre-defined centreline distance, and the final results are displayed.

Required Equipment

• 100Hz GPS Data Logger or Speed Sensor (VBOX3i/VB100)

• Laptop PC

• Centre Line Deviation Software: There are three views for the software.

1. The Main View. Showing 4 sample runs and live data	2. The Graph View. Displays a graph of speed (y-axis) against time or distance.	3. The Map View. Displays centreline deviation (y-axis) against centreline distance (x-axis). Graphs contain data for the most recent run (red trace) and up to nine previous runs (pink traces).

Find out more

Discuss your requirements or arrange a demonstration with us:

UK: Call Kevin Bursnall (Technical Director) on +44 (0) 1280 825 972 or email us on This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
Worldwide: Contact your local VBOX Distributor here.