Test rigs and methods for testing dual-axle vehicle corner systems

A test rig or a dual-axle vehicle corner system comprising a suspension assembly and a first wheel and a second wheel coupled to the suspension assembly, the test rig comprising:

• a support frame to couple the dual-axle vehicle corner system to the test rig;
• a wheel support surface to support the first wheel and the second wheel of the dual-axle vehicle corner system;
• and
• at least one actuator to repeatedly move the support frame in a direction that is substantially perpendicular to the wheel support surface to actuate the suspension assembly of the dual-axle vehicle corner system.

A method of testing a dual-axle vehicle corner system comprising a suspension assembly and a first wheel and a second wheel coupled to the suspension assembly, the method comprising:

• coupling the dual-axle vehicle corner system to a test rig;
• and
• by the test rig, repeatedly actuating the suspension assembly of the dual-axle vehicle corner system a vertical direction, the vertical direction being perpendicular to spinning axes of the first wheel and the second wheel coupled the suspension assembly;
• and
• wherein the actuating of the suspension assembly is by causing motion of a sub-frame of the dual-axle vehicle corner system with respect to at least one of the first wheel and the second wheel in the vertical direction.