Drive for dynamic mechanical system

Details Drive for dynamic mechanical system Drive for dynamic mechanical system

1976-02-27

1977-09-20

Duggan, Donovan F.

Electricity: motive power systems

Reciprocating or oscillating motor

Energizing winding circuit control

73 716, 310 27, 318132, H02K 3300

Patent

active

040499979

ABSTRACT:
A dynamic mechanical system is driven at its resonant frequency by a drive system which maintains the vibrational amplitude of the system constant. A displacement transducer senses the mechanical displacement of the system and provides a displacement signal which is used to generate a control signal related to the energy necessary to maintain the mechanical system in resonance. The zero crossover points of the displacement signal are shifted in-phase 90.degree. and used to selectively switch the control signal to provide an in-phase drive signal for the system. An offset correction system senses any asymmetry present in the displacement signal and adjusts the drive signal to compensate for such asymmetry so that the mechanical system operates about a zero point of the displacement transducer.

REFERENCES:
patent: 2935672 (1960-05-01), Ross
patent: 3486094 (1969-12-01), Zane
patent: 3504250 (1970-03-01), Stevens, Jr. et al.
patent: 3787715 (1974-01-01), Eaton, Jr.
patent: 3872333 (1975-03-01), Imbert et al.

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