| Popis: |
A series of linear piezoceramic inchworm actuators with various applications have been developed. There are three active piezoceramic elements within the inchworm: two ‘‘clamps‘‘ and one ‘‘pusher,’’ each of which is driven independently with a voltage of up to 120 V. Large displacements are achieved by repetitively advancing and clamping the pushing element, with each small step on the order of 10 μm. A program using labview software is used to generate the driving signals to the clamps and pusher. With this program, experiments are performed to study the dynamics of the system, and in particular to identify the conditions for maximum force and velocity as well as the onset of resonance within the clamp and pusher elements. The maximum frequency, force, and velocity for the inchworm are shown to depend on the end loading condition, the type of load (mass or spring), as well as the input signal parameters, which are the frequency, phasing amplitude, and shape of the waveforms. The result of the experimenta... |
