2.2.2 Test methods
Figure 1 showed the structure of mini-tiller’s
vibration test. NI 9234 data acquisition card collects the
vibration acceleration signals at the handle and the engine
cover through the three-dimensional acceleration sensors
attached to the tiller and transmits them to LabVIEW
SignalExpress analysis software, and the frequency
domain characteristics of the signals can be obtained by
filtering and fast Fourier transforming (FFT).