Cruise airspeed control for aircraft

Patent · Tue Feb 03 00:00:00 EST 1987

OSTI ID:6779552

Zweifel, T L; Miller, H

A speed control system is described for aircraft having an automatic throttle control means for controlling the thrust imparted to the aircraft and having first dynamic response characteristics and an automatic altitude control means for controlling pitch attitude to maintain a predetermined altitude and having second dynamic response characteristics comprising: means providing a speed error signal proportional to the difference between a reference speed and the actual speed, means providing an altitude error signal proportional to the difference between a reference altitude and the actual altitude, first integrator means responsive to the speed error signal for controlling the throttle control means, second integrator means responsive to the altitude error signal and the speed error signal for controlling the altitude control means, and isolation filter means responsive to the speed error signal for additionally controlling the throttle control means. The filter has a frequency response to the speed error signal such as to minimize interference between the first and second dynamic response characteristics by accepting long terms changes in airspeed and rejecting short term changes in airspeed due to changes in pitch attitude.

• Assignee: Sperry Corp., New York, NY
• Patent Number(s): US 4641268
• OSTI ID: 6779552
• Resource Relation: Patent File Date: Filed date 27 Jan 1983
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
AIRCRAFT
COMPUTERIZED CONTROL SYSTEMS
SPEED REGULATORS
ALTITUDE
DIGITAL FILTERS
ERRORS
FREQUENCY CONTROL
INCIDENCE ANGLE
INCLINATION
SIGNALS
VELOCITY
CONTROL
CONTROL EQUIPMENT
CONTROL SYSTEMS
EQUIPMENT
320201* - Energy Conservation
Consumption
& Utilization- Transportation- Air & Aerospace