Vibration Signature Analysis for Transmission Testing

A flexible, customizable vibration analysis system for use in the transmission assembly plants was developed using the LMS Cada-X software, and its built in programming language, UPA. The system runs on a VXI HP V743, HP-UX 10.20 platform, and uses the HP E1432 51.2kS/s digitizer and DSP card.

Vibration data from transmissions, mounted on a test stand, is gathered from two accelerometers pressed against the transmission casing by pneumatically actuated arms. The vibration data is collected by the E1432 card and sent to the HP V743 computer where it is processed by the vibration analysis software. The type of data aquisition and a specific set of calculations is configured by the user for a specific transmission model and automatically selected by the test stand control computer. At the end of the test cycle the results of the calculations are sent to the test stand control computer for a pass/fail decision. The raw vibration data and the results of calculations can be archived, upon user request, either on the vibration test computer or a network device.

The signature analysis system is capable of acquiring time, angle, frequency, and order data, and performing many calculations, such as integration, band energy, Kurtosis, and template comparison calculations.

The vibration signature analysis system is used to test the condition of bearings, gears, and chains in the transmissions; correct assembly; sub-assembly looseness; and magnetic speed sensor function.

Back to the SEA home page