This paper presents a fractional calculus perspective in the study of signals captured during the movement of a mechanical
manipulator carrying a liquid container. In order to study the signals an experimental setup is implemented. The system acquires data from
the sensors, in real time, and, in a second phase, processes them through an analysis package. The analysis package runs off-line and handles
the recorded data. The results show that the Fourier spectrum of several signals presents a fractional behavior. The experimental study
provides useful information that can assist in the design of a control system and the trajectory planning to be used in reducing or eliminating
the effect of vibrations.