초록 ▼

A cruise speed control apparatus in an aircraft performance management system wherein target Mach command is supplied to the engine automatic throttle controls to establish an engine thrust to overcome and equate to the aircraft nominal drag characteristics at that commanded Mach speed and simultane

A cruise speed control apparatus in an aircraft performance management system wherein target Mach command is supplied to the engine automatic throttle controls to establish an engine thrust to overcome and equate to the aircraft nominal drag characteristics at that commanded Mach speed and simultaneously the difference between the actual Mach number speed and the target Mach command speed is supplied to the automatic pilot pitch axis control to cause the aircraft to maintain the commanded Mach speed through change in pitch attitude and altitude. The integral of any altitude standoff is used to adjust required thrust to achieve the commanded Mach target and reduce the standoff to zero. If necessary, filtered altitude error may be used to provide dynamic damping of the throttle control loop and compensation for long term degradation in the aircraft\s drag characteristic with time is provided by measuring the drag degradation ratio and adjusting the target Mach command in accordance therewith.

대표청구항 ▼

A speed control system for aircraft having an automatic throttle control means for controlling the thrust imparted to the aircraft and an automatic altitude control means for controlling aircraft pitch attitude to maintain a selected altitude comprising: means for providing a speed reference signal,

A speed control system for aircraft having an automatic throttle control means for controlling the thrust imparted to the aircraft and an automatic altitude control means for controlling aircraft pitch attitude to maintain a selected altitude comprising: means for providing a speed reference signal, means for providing a signal representing actual speed, means responsive to said signals for providing a speed error signal proportional to a difference between said speed reference signal and said actual speed signal, means for providing an altitude reference signal, means for providing a signal representing actual altitude, means responsive to said altitude reference and said actual altitude signals for providing an altitude error signal proportional to a difference between said altitude signals and for supplying said altitude error signal to said throttle control means to correct for minor altitude errors by biasing said altitude reference signal in a sense to reduce said altitude error signal to zero, and means for supplying said speed reference signal to said throttle control means and for supplying said speed error signal and said altitude error signal to said altitude control means for correcting minor speed deviations by biasing said altitude reference signal in a sense to reduce said speed error toward zero.