Electricity: motive power systems – Positional servo systems – Vehicular guidance systems with single axis control
Patent
1974-10-29
1976-02-24
Sloyan, Thomas J.
Electricity: motive power systems
Positional servo systems
Vehicular guidance systems with single axis control
2351502, 244 77D, 340347AD, B64C 1318, G05D 108, H03K 1302
Patent
active
039406733
ABSTRACT:
System for sampling and holding an analog signal corresponding to the altitude of an aircraft and providing a control signal for maintaining the aircraft at the altitude where sampling occurs. A binary converter stores a count corresponding to the level of the sampled signal, and a digital-to-analog counter provides an output analog signal corresponding to the count registered by the counter. The altitude signal is compared with the output signal to provide an altitude correction signal in the event that the altitude signal deviates from the level corresponding to the stored count.
REFERENCES:
patent: 3276012 (1966-09-01), Secretan
patent: 3298019 (1967-01-01), Nossen
patent: 3316547 (1967-04-01), Ammann
patent: 3578269 (1971-05-01), Kramer et al.
patent: 3626262 (1971-12-01), Kelling
Analog Devices, Inc., Analog-Digital Conversion Handbook, 1972, pp. III-84 & III-85.
Edcliff Instruments
Sloyan Thomas J.
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