Registers – Transfer mechanism – Traveling pawl
Patent
1975-02-28
1976-08-10
Botz, Eugene G.
Registers
Transfer mechanism
Traveling pawl
73 673, 2351501, G01M 700, G01R 1904
Patent
active
039743640
ABSTRACT:
Structure for and method of compensating for a mechanical frequency response structure induced phase shift of an alternating electrical command signal in a closed loop control circuit so that magnitude errors independent of phase errors may be utilized in the control circuit. The structure includes a mechanical structure to be controlled having a mechanical frequency response to the cyclic command signal, an electronic frequency response circuit for producing a phase shift in the command signal substantially the same as that produced by the mechanical frequency response structure over the frequency range of the command signal, and structure for summing the error signal from the mechanical frequency response structure and from the electronic frequency response circuit to provide a magnitude error only signal, and means for providing an output signal when the selected error signal is outside of a permissible error signal range. The structure may also include switch means so that a combined magnitude and phase error signal may be substituted for the magnitude only error signal to again provide an output signal when the combined error signal is outside of a permissible error signal range.
REFERENCES:
patent: 3462999 (1969-08-01), Fultz et al.
patent: 3848115 (1974-11-01), Sloane et al.
Meyer Walter E.
Sallberg David W.
Botz Eugene G.
Koehring Company
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