Abstract
Abstract Taking the welding robot as a research object, stochastic noise test and linear frequency sweeping test are carried out on the welding gun of a welding robot. In the tests above, tri-axial vibration and exciting force are picked up by an acceleration sensor and a force sensor. The force sensor collects input force and the acceleration sensor collects vibration response. The dynamic performance of the robot is assessed by estimating force-displacement frequency response function. The weak links of the robot can be reflected through analyzing low order natural frequency distribution. This study shows that the low-frequency components of the welding robot structure are easily explored when the displacement response is measured, and experimental da-ta will supply a clue for optimization of robot structure design.
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