Actually this is the impulse force, which is to be applied on the rod element?
Piezo-electric actuator? A fast DC motor with ex-center element? Maybe?
0.3 mSec of pulse duration is not consistent with 80KHz frequency. Generally, piezoelements used in about that range.
Generally, there are 2 ways of converting electricity in mechanical force/movement:
- The electrical field - eg piezo-electric transducer. Eg diesel injector
- The magnet field - eg loudspeaker, tweeter.
80 Khz excitation is in the range of tweeter loudspeakers. (Well, sort of. They normally go up to
20 Khz. If you want 80 Khz, you will have to do some special stuff.)
For magnetic field excitation, for it to work at these high frequencies, the issue is you need to make the moving part sufficiently stiff, so that all resonant frequencies of the moving part are higher in frequency that the frequency you want to render. In this, there is a relationship between the size of the actuator, and the max frequency you can render. All things being equal, larger size constructs have lower resonant frequencies, so can render only lower frequencies. You see this eg in speakers, where the low-frequency speakers (woofers) are big, and the high-frequency ones are small.
The specifics of your problem are not given, so its not clear if it is solvable or not.
-Henri
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