Servo-Hydraulic Test Bench
- Vehicle test
Endurance tests are performed based on realistic excitation signals. On the one hand, these signals must be high enough to significantly reduce the time to breakdown compared to regular use; on the other hand, they must not lead to breakdown appearances that do not occur in reality. In addition, a correlation must be found between the operating times until the breakdown on the road and under test bench conditions. In this way, operating conditions can be defined that allow significant time and financial savings.
Rattle and groan noises generally occur at high excitation amplitudes or sudden excitations. This applies particularly to vehicles with high mileage. For example, they occur at the glove compartment, in the door panel, in the cockpit or the rear shelf.
- Measured body vibration
By excitation with the profile of particularly deteriorated stretches or off-road signals, perhaps even over many hours, the critical points in the vehicle can be shown. This allows an early detection and on-time removal of the causes.
To simulate the rolling noise excitation in the vehicle, the system is equipped with special, rapidly responding servo valves that allow a street excitation up to 200 Hz. First, the vertical accelerations at the hub carriers while crossing the road surface of interest are recorded. By using the digital test bench control, these acceleration samples can be reproduced in the system. This procedure offers significant advantages, e.g. when investigating structure-borne sound transfer paths and performing operational vibration analyses.
- Suspension Strut Test Bench
- Engine Mount Test Bench
