GB2136605B - Helicopter attitude and airspeed acquisition and retention system - Google Patents

Helicopter attitude and airspeed acquisition and retention system

Info

Publication number
GB2136605B
GB2136605B GB08401178A GB8401178A GB2136605B GB 2136605 B GB2136605 B GB 2136605B GB 08401178 A GB08401178 A GB 08401178A GB 8401178 A GB8401178 A GB 8401178A GB 2136605 B GB2136605 B GB 2136605B
Authority
GB
United Kingdom
Prior art keywords
airspeed
acquisition
autopilot
retention system
engaged
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB08401178A
Other versions
GB2136605A (en
GB8401178D0 (en
Inventor
Douglas Harold Clelford
Richard Dennis Murphy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Raytheon Technologies Corp
Original Assignee
United Technologies Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US06/176,832 external-priority patent/US4382283A/en
Application filed by United Technologies Corp filed Critical United Technologies Corp
Publication of GB8401178D0 publication Critical patent/GB8401178D0/en
Publication of GB2136605A publication Critical patent/GB2136605A/en
Application granted granted Critical
Publication of GB2136605B publication Critical patent/GB2136605B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D1/00—Control of position, course or altitude of land, water, air, or space vehicles, e.g. automatic pilot
    • G05D1/0055—Control of position, course or altitude of land, water, air, or space vehicles, e.g. automatic pilot with safety arrangements
    • G05D1/0061—Control of position, course or altitude of land, water, air, or space vehicles, e.g. automatic pilot with safety arrangements for transition from automatic pilot to manual pilot and vice versa
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/14—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring differences of pressure in the fluid
    • G01P5/16—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring differences of pressure in the fluid using Pitot tubes, e.g. Machmeter
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D1/00—Control of position, course or altitude of land, water, air, or space vehicles, e.g. automatic pilot
    • G05D1/08—Control of attitude, i.e. control of roll, pitch, or yaw
    • G05D1/0808—Control of attitude, i.e. control of roll, pitch, or yaw specially adapted for aircraft
    • G05D1/0858—Control of attitude, i.e. control of roll, pitch, or yaw specially adapted for aircraft specially adapted for vertical take-off of aircraft

Abstract

The description is substantially identical to that of Patent Specification GB 2081474A but the claims are directed to a helicopter pitch axis autopilot system with provision for manual override when the cyclic pitch control stick is moved away from its trim position, the system memorising the trim position so that the autopilot can subsequently be re-engaged. When the autopilot is re-engaged an airspeed error limiter ensures a smooth transition.
GB08401178A 1980-08-08 1984-01-17 Helicopter attitude and airspeed acquisition and retention system Expired GB2136605B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/176,832 US4382283A (en) 1980-08-08 1980-08-08 Helicopter attitude and airspeed acquisition and retention system
GB8121053A GB2081474B (en) 1980-08-08 1981-07-08 Helicopter attitude and airspeed acquisition and retention system

Publications (3)

Publication Number Publication Date
GB8401178D0 GB8401178D0 (en) 1984-02-22
GB2136605A GB2136605A (en) 1984-09-19
GB2136605B true GB2136605B (en) 1985-05-15

Family

ID=26280057

Family Applications (4)

Application Number Title Priority Date Filing Date
GB08401179A Expired GB2136576B (en) 1980-08-08 1984-01-17 Helicopter airspeed measuring system
GB08401176A Expired GB2136603B (en) 1980-08-08 1984-01-17 Helicopter attitude and airspeed acquisition and retention system
GB08401178A Expired GB2136605B (en) 1980-08-08 1984-01-17 Helicopter attitude and airspeed acquisition and retention system
GB08401177A Expired GB2136604B (en) 1980-08-08 1984-01-17 Helicopter attitude and airspeed acquisition and retention system

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB08401179A Expired GB2136576B (en) 1980-08-08 1984-01-17 Helicopter airspeed measuring system
GB08401176A Expired GB2136603B (en) 1980-08-08 1984-01-17 Helicopter attitude and airspeed acquisition and retention system

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB08401177A Expired GB2136604B (en) 1980-08-08 1984-01-17 Helicopter attitude and airspeed acquisition and retention system

Country Status (1)

Country Link
GB (4) GB2136576B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2610411B1 (en) * 1987-02-04 1989-06-09 Sfim METHOD AND DEVICE FOR MEASURING THE SPEED IN RELATION TO THE AIR OF A LOW-SPEED HELICOPTER
FR2741855B1 (en) * 1995-12-05 1998-01-30 Eurocopter France CYCLIC SLEEVE SYSTEM FOR SPEED STABILITY OF A HELICOPTER
EP3561631B1 (en) * 2018-04-25 2022-11-23 The Boeing Company Pitch and thrust control for compound aircraft
US10877487B2 (en) * 2018-04-25 2020-12-29 The Boeing Company Pitch and thrust control for compound aircraft
US11312480B2 (en) 2018-06-01 2022-04-26 Textron Innovations Inc. System and method for controlling rotorcraft
CN111498095A (en) * 2019-01-02 2020-08-07 贝尔德事隆公司 System and method for controlling a rotorcraft

Also Published As

Publication number Publication date
GB2136604B (en) 1985-03-27
GB8401179D0 (en) 1984-02-22
GB8401177D0 (en) 1984-02-22
GB2136576B (en) 1985-03-27
GB2136603B (en) 1985-06-05
GB2136605A (en) 1984-09-19
GB2136603A (en) 1984-09-19
GB2136604A (en) 1984-09-19
GB8401176D0 (en) 1984-02-22
GB8401178D0 (en) 1984-02-22
GB2136576A (en) 1984-09-19

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19980708