Compound aircraft control system and method

• US 8,463,465 B2
• Filed: 06/29/2010
• Issued: 06/11/2013
• Est. Priority Date: 08/16/2006
• Status: Active Grant

• Current Assignee: Piasecki Aircraft Corporation
• Original Assignee: Piasecki Aircraft Corporation
• Inventors: Piasecki, Frank N., Greenjack, Andrew S., Horn, Joseph F.
• Primary Examiner(s): Tran, Khoi
• Assistant Examiner(s): Amin, Bhavesh V
• Application Number:
  US12/825,963
• Publication Number:
  US 20100324758A1
• Time in Patent Office: 1,078 Days
• Field of Search: None
• US Class Current: 701/4
• CPC Class Codes: B64C 2027/8236 including pusher propellers
• CPC Class Codes: B64C 2027/829 comprising a V-tail units
• CPC Class Codes: B64C 27/26 characterised by provision of fixed wings
• CPC Class Codes: B64C 27/82 characterised by the provision of an auxiliary rotor or fluid-jet device for counter-balancing lifting rotor torque or changing direction of rotorcraft
• CPC Class Codes: G05D 1/0858 specially adapted for vertical take-off of aircraft

Abstract

The Invention is a control system for a compound aircraft. A compound aircraft has features of both a helicopter and a fixed wing aircraft and provides redundant control options. The control system allows an authorized person to select any of plurality of operational objectives each of which is designed to achieve any particular command.

Claims

1. A compound aircraft, the compound aircraft comprising:

a. a fuselage;

b. a rotor, said rotor being rotatably attached to said fuselage;

c. a wing, said wing being attached to said fuselage;

d. a plurality of control effectors attached to said fuselage;

e. a microprocessor operably connected to said plurality of control effectors, said microprocessor being configured to operate said control effectors;

f. a computer memory operably connected to said microprocessor;

g. a plurality of selectable overall operational objectives stored within said computer memory;

h. a selector, said selector being configured to select a one of said overall operational objectives from among said plurality of overall operational objectives, said selector being operably connected to said microprocessor;

i. a sensor, said sensor being configured to detect a condition of the compound aircraft, said sensor being operably connected to said microprocessor;

j. a plurality of combinations of trim control settings to control at least one of a roll, a pitch and a yaw of the compound aircraft, said plurality of combinations of trim control settings being selectable by said microprocessor;

k. said microprocessor being configured to receive a command, each of said plurality of trim control settings being configured to achieve said command when applied by said microprocessor, a one of said plurality of trim control settings corresponding to said selected operational objective, said microprocessor being configured to select said one of said plurality of trim control settings corresponding to said selected operational objective, said microprocessor being configured to operate said control effectors to implement said selected one of said plurality of combinations of trim control settings.

2. The compound aircraft of claim 1 wherein at least two of said control effectors are configured to control said roll of the compound aircraft and wherein said selected one of said plurality of said combinations of trim control settings includes said trim control settings for said at least two of said control effectors configured to control said roll of the compound aircraft.

3. The compound aircraft of claim 2, the compound aircraft further comprising:

a plurality of combinations of weighting factors, said plurality of combinations of said weighting factors being stored in said computer memory, said microprocessor being programmed to select a one of said plurality of said combinations of weighting factors in response to said command, said selected one of said plurality of said combinations of weighting factors being associated with said selected one of said overall operational objectives, said selected one of said plurality of said combinations of weighting factors including said weighting factors to control said roll of the compound aircraft in maneuvering flight utilizing at least said two of said control effectors configured to control said roll of the compound aircraft.

4. The compound aircraft of claim 1 wherein at least two of said control effectors are configured to control said pitch of the compound aircraft, said selected one of said plurality of said combinations of trim control settings including said trim control settings for said at least said two of said control effectors to control said pitch of the compound aircraft.

5. The compound aircraft of claim 4, the compound aircraft further comprising:

a plurality of combinations of weighting factors, said plurality of combinations of said weighting factors being stored in said computer memory, said microprocessor being programmed to select a one of said plurality of said combinations of weighting factors in response to said command, said selected one of said plurality of said combinations of weighting factors being associated with said selected one of said overall operational objectives, said selected one of said plurality of said combinations of weighting factors including said weighting factors to control said pitch of the compound aircraft in maneuvering flight utilizing at least said two of said control effectors configured to control said pitch of the compound aircraft.

6. The compound aircraft of claim 1 wherein at least two of said control effectors are configured to control said yaw of the compound aircraft, said selected one of said plurality of combinations of trim control settings including trim control settings for said at least two of said control effectors configured to control said yaw of the compound aircraft.

7. The compound aircraft of claim 6, the compound aircraft further comprising:

a plurality of combinations of weighting factors, said plurality of combinations of said weighting factors being stored in said computer memory, said microprocessor being programmed to select a one of said plurality of said combinations of weighting factors in response to said command, said selected one of said plurality of said combinations of weighting factors being associated with said selected one of said overall operational objectives, said selected one of said plurality of said combinations of weighting factors including said weighting factors to control said yaw of the compound aircraft in maneuvering flight utilizing said at least two of said control effectors configured to control said yaw.

8. A compound aircraft, the compound aircraft comprising:

a. a fuselage;

b. a rotor, said rotor being rotatably attached to said fuselage;

c. a wing, said wing being attached to said fuselage;

d. a plurality of control effectors attached to said fuselage;

e. a microprocessor operably connected to said plurality of control effectors;

f. a sensor, said sensor being configured to detect a condition of the compound aircraft, said sensor being operably connected to said microprocessor;

g. a computer memory operably connected to said microprocessor;

h. said microprocessor being configured to receive a command;

i. said microprocessor being configured to operate said plurality of control effectors to apply a combination of trim control settings that will achieve said command in light of said condition of the compound aircraft;

j. a selector, said selector being configured to select an overall operational objectives from among a plurality of overall operational objectives, said selector being operably connected to said microprocessor;

k. said combination of trim control settings being a one of a plurality of combinations of trim control settings each of which would achieve said command in light of said condition of the compound aircraft, said microprocessor being configured to apply said one combination of trim control settings that is consistent with said selected operational objective.

9. The compound aircraft of claim 8, the compound aircraft further comprising:

a control inceptor, said control inceptor being operably attached to said microprocessor, said control inceptor being configured to receive said command and to communicate said command to said microprocessor.

10. The compound aircraft of claim 9 wherein said control inceptor is configured to receive said command from a human being.

11. The compound aircraft of claim 10 wherein said plurality of combinations of trim control settings is stored in said computer memory and wherein said plurality of overall operational objectives is stored in said computer memory, said microprocessor being configured to select said one of said plurality of combinations of trim control settings from among said plurality of combinations of trim control settings stored in said computer memory.

12. The compound aircraft of claim 11 wherein said plurality of control effectors are configured to control at least a one of a roll, a pitch, and a yaw of said fuselage.

13. The compound aircraft of claim 8, the compound aircraft further comprising:

a plurality of combinations of weighting factors configured to be applied by said microprocessor to control the compound aircraft in maneuvering flight, said plurality of combinations of weighting factors being stored in said computer memory, said microprocessor being configured to select a one of said plurality of combinations of weighting factors in response to said command, said selected one of said plurality of combinations of weighting factors being consistent with said selected one of said overall operational objectives.

14. The compound aircraft of claim 13 wherein said selected one of said plurality of said combinations of weighting factors includes said weighting factors to control at least a one of said roll, said pitch and said yaw of the compound aircraft.

15. The compound aircraft of claim 14 wherein said plurality of combinations of trim control settings is stored in said computer memory and wherein said plurality of overall operational objectives is stored in said computer memory, said microprocessor being configured to select said one of said plurality of combinations of trim control settings from among said plurality of combinations of trim control settings stored in said computer memory.