In a round-robin-test it was tested whether models of the sitting man can be used in seat tests in order to avoid exposure to vibrations for test persons and in order to increase the measuring accuracy. To this end the vibration properties, i.e. the seat transmission factor (SEAT), were determined with test persons differing in weight (55 kg, 75 kg, 98 kg) as well as with three different models of the sitting man in laboratory and field tests. Standard-approved seat tests (ISO 10326-1) of four different vehicle seats were performed in the laboratory tests, the vibration measuring in the field test took place on a agricultural wheeled tractor and a tracked vehicle. The tests showed the following results: The deviations of the three repetitions within the respective measuring of one test-office are below ±5% for the test persons as well as for the models of the sitting man. As a rule, the scattering of the measurement values determined in the laboratory is less strong at the models in comparison to the test persons. The SEAT-factors show that on an average the driver"s seats suspension effect measured at the models turns out 11% (laboratory test) or 8% (field test) higher than at the test persons. A later modification of the models led to a decrease of this deviation to below 6% in the laboratory test and therefore to an acceptable copying of the vibration properties of the test persons. Impedance measurements at the end of the round-robin-test showed that the suitability for practical application of the model of the sitting man is also ensured after more than 30 hours of exposure to vibrations and after having been transported several times. The round-robin-test proved that simple mechanical models of the sitting man can be applied in seat tests according to standard. It was shown that also an aimed optimization of parameters cannot lead to a complete correspondence between model and real person for such models of the sitting man.

The complete research report "Testing of new developed vibration models of the seated human by a Round-Robin-Test" is also available as pdf-file (in German only).