Resonance identification in hydraulic cylinder piston position sensing

Reference Number: N 01-03

Inventors: Morgan, Dennis E.

USPTO Link: 5780743

Invention Summary

The ability to be able to identify, distinguish and verify a lock onto harmonic frequency signals in the oil of a hydraulic cylinder using a ratio between consecutively detected harmonics. The identification is useful in providing early and reliable harmonic resonance "lock on" and the ability to "lock on" to a particular order harmonic resonance.