From vehicle measurement to simulation on the test bench-Vibration test
Vibin Jacob
18y exp in R&D Product Dev.,Thermal System(HVAC and Powertrain cooling), NVH, Vehicle Development,Testing & EV thermal.
tion of the measurement data
a) Application of the vehicle
b) Measurement on the rough road
- From the raw data to the test signals
The test stand
a) Functional scheme
b) superstructure car & truck module
- The vibration test – rough road simulation
a) Adjusting the profile on the test bench
b) example typical results/failures
?Processing steps of the raw data a) Filtering with a bandpass of 2-50 Hz
b) Remove the no damage-relevant sections for all channels
Target signal vs. control signal for test bench (servo valves)
?Adjusting the profile on the test bench. Determination of the transfer functions
Iteration of the target signal on the frame.
TechnicalData
Stroke: 100mm, Frequency Range: up to 150 Hz
Maximum velocity of cyl.: 1.2 m/s, Max Acceleration: 20g?
Signal Forms : sine, random, time simulation?
typical values??of bad road profiles
Stroke 40-80mm, Frequency 50-60 Hz (filtered)
max. acceleration 13 g (at the module)
Comparison of the module accelerations of the vehicle with the test stand