Electricity: motive power systems – Positional servo systems – Vehicular guidance systems with single axis control
Patent
1973-07-31
1977-03-01
Dobeck, B.
Electricity: motive power systems
Positional servo systems
Vehicular guidance systems with single axis control
318 16, 318608, 318562, G05B 19100
Patent
active
040104095
ABSTRACT:
In a frequency selective steering system for automatic vehicle guidance, a phase locked loop is used to derive from a sum signal containing wanted and unwanted signal frequencies a reference signal equal in phase and frequency to the wanted signal. The reference signal is used to derive from a difference signal also containing wanted and unwanted signal frequencies an error signal dependent on the phase of the wanted signal only. The error signal is used to control the steering of the vehicle.
REFERENCES:
patent: 3587100 (1971-06-01), Doremus
patent: 3669208 (1972-06-01), Brooke
patent: 3669209 (1972-06-01), Brooke
patent: 3768586 (1973-10-01), Thompson et al.
Dobeck B.
EMI Limited
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