Main Parameters of Component Rattle Test Laboratory

1、Ambient background noise

≤25 dBA

2、Bench excitation types

■ Random spectrum (PSD)

■ Time-domain spectrum

■ Sine spectrum (sweep / fixed frequency)

3、Bench excitation directions

■ 4D mode: Uniaxial excitation along X/Y/Z and anti-phase directions

■ Composite VPR mode: Vertical + Pitch + Roll

Test Methods for Subsystem & Component Rattle Bench Test

1、Evaluation methods

■ Subjective evaluation (problem identification + grade rating)

■ Objective measurement (sound pressure level / loudness)

2、Main subsystems & components

■ Chassis: Shock absorbers, steering gears, steering columns

■ Interior: Main & auxiliary instrument panels, seats, door trims

■ Exterior: Sunroofs, rearview mirrors, headlamps

■ Body accessories: Weather strips, seat belt retractors

■ Others: HUD, ambient lighting, pressure relief valves

Applicable subsystems and components for all vehicle types:

■ Subsystems & components for Sedans

■ Subsystems & components for SUVs

■ Subsystems & components for MPVs

■ Subsystems & components for Pickups

Scope of Application:

■ DV test (Design Verification) for brand-new subsystems and components

■ Rattle performance verification for structurally updated parts of facelift vehicles

■ VAVE rattle performance verification for individual components