Three-dimensional vibration test on handles of hedge-trimmer based on virtual instrument

In order to find a simple and practical method to test the three-dimensional vibration on the handles of hedge-trimmer, the virtual instrument was used to test the handles on the three-dimensional vibration to explore a new testing model so as to make it possible that ‘General Hardware + Software Designing = Multiple Sets of Special Testing Equipments’. The software of virtual instrument was designed to collect, display, and deal with test data timely and accurately, while the choice of testing programme identifies the influence levels caused by various factors, and the selection of general hardware reduced the use of dedicated hardwares. The test results showed that vibration values were related to rotate speed of engine, contact position and contact area. Vibration values of left handle were biggest at the moderate rotate speed, and in the middle of the handle and small contact area. And vibration values of right handle were biggest at the high rotate speed, and in the rear of the handle and moderate contact area. The maximum vibration values were different producing on the left and right handles in frequency domain and in time domain. In order to compare the results, we must test the vibration values in the same condition. The result proves that the virtual instrument is simple and effective when it is used to test the handles on three-dimensional vibration, and it has the value of practical application.