Abstract: A vehicle, such as an airplane sets a limit for a control variable used to deflect a control surface. The limit is set as a function of an unfavorable flight condition/target angle of attack and a rate of change of angle of attack so that a pilot control variable command is prevented from exceeding the limit to prevent the vehicle from reaching an unfavorable flight condition and/or exceeding a desired angle of attack limit.

Abstract: A vehicle, such as an airplane sets a limit for a control variable used to deflect a control surface. The limit is set as a function of an unfavorable flight condition/target angle of attack and a rate of change of angle of attack so that a pilot control variable command is prevented from exceeding the limit to prevent the vehicle from reaching an unfavorable flight condition and/or exceeding a desired angle of attack limit.

Abstract: Systems and methods for configuring a direct lift control system of a vehicle are disclosed. An example system provided herein includes a spoiler coupled to an aircraft, a direct lift control schedule to generate a plurality of spoiler deflection commands and a controller to control an actuator coupled to the spoiler to actuate the spoiler based on the spoiler deflection commands to modulate lift of the aircraft without using a short-period pitch control.

Abstract: Systems and methods for configuring a direct lift control system of a vehicle are disclosed. An example system provided herein includes a spoiler coupled to an aircraft, a direct lift control schedule to generate a plurality of spoiler deflection commands and a controller to control an actuator coupled to the spoiler to actuate the spoiler based on the spoiler deflection commands to modulate lift of the aircraft without using a short-period pitch control.

Abstract: A system is disclosed for controlling an aircraft when the hydraulic system of the aircraft has been compromised. The system includes a digital fly-by-wire control system configured to rescale at least one gain vector. The gain(s) may then used by a digital control to modulate engine thrust. In this manner, engine thrust modulation may be used for stabilization and control of control-configured aircraft without requiring a substantial change in piloting technique.

Abstract: A system is disclosed for controlling an aircraft when the hydraulic system of the aircraft has been compromised. The system includes a digital fly-by-wire control system configured to rescale at least one gain vector. The gain(s) may then used by a digital control to modulate engine thrust. In this manner, engine thrust modulation may be used for stabilization and control of control-configured aircraft without requiring a substantial change in piloting technique.

Abstract: A method is disclosed for controlling an aircraft when the hydraulic system of the aircraft has been compromised. The method may include resealing at least one gain vector of a digital fly-by-wire, lower-order, full-state feedback control in at least one axis. The gain(s) may then used by a digital control to modulate engine thrust. In this manner, engine thrust modulation may be used for stabilization and control of control-configured aircraft without requiring a substantial change in piloting technique.

Abstract: A method is disclosed for controlling an aircraft when the hydraulic system of the aircraft has been compromised. The method may include resealing at least one gain vector of a digital fly-by-wire, lower-order, full-state feedback control in at least one axis. The gain(s) may then used by a digital control to modulate engine thrust. In this manner, engine thrust modulation may be used for stabilization and control of control-configured aircraft without requiring a substantial change in piloting technique.

Abstract: Aerospace vehicle yaw generating systems and associated methods are disclosed herein. One aspect of the invention is directed toward a yaw generating system that can include an aerospace vehicle having a fuselage with a first portion and a second portion. The system can further include a movable control surface coupled to the fuselage and extending generally in a horizontal plane. The control surface can be movable to a deflected position in which the control surface can be positioned to create a flow pattern proximate to the fuselage when the aerospace vehicle is located in a flow field. The flow pattern can be positioned to create a pressure differential between the first portion of the fuselage and the second portion of the fuselage. The first and second portions can be located so that the pressure differential produces a yawing moment on the aerospace vehicle.

Abstract: Aerospace vehicle yaw generating systems and associated methods are disclosed herein. One aspect of the invention is directed toward a yaw generating system that can include an aerospace vehicle having a fuselage with a first portion and a second portion. The system can further include a movable control surface coupled to the fuselage and extending generally in a horizontal plane. The control surface can be movable to a deflected position in which the control surface can be positioned to create a flow pattern proximate to the fuselage when the aerospace vehicle is located in a flow field. The flow pattern can be positioned to create a pressure differential between the first portion of the fuselage and the second portion of the fuselage. The first and second portions can be located so that the pressure differential produces a yawing moment on the aerospace vehicle.