GB679187A - Improvements in and relating to duplicated servomotor systems - Google Patents
Improvements in and relating to duplicated servomotor systemsInfo
- Publication number
- GB679187A GB679187A GB12299/49A GB1229949A GB679187A GB 679187 A GB679187 A GB 679187A GB 12299/49 A GB12299/49 A GB 12299/49A GB 1229949 A GB1229949 A GB 1229949A GB 679187 A GB679187 A GB 679187A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pistons
- differential
- control
- lever
- jacks
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C13/00—Control systems or transmitting systems for actuating flying-control surfaces, lift-increasing flaps, air brakes, or spoilers
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Aviation & Aerospace Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
679,187. Fluid-pressure servomotor-control systems. BOULTON PAUL AIRCRAFT, Ltd., and NORTH, J. D. May 8, 1950 [May 9, 1949], No. 12299/49. Class 135. In a duplicated servomotor system in which two motors drive a common output member and the two motors also drive in opposite senses two input elements of a differential so as to detect differences in speed between the two motors, the output signal from the differential is applied in opposite senses to two individual control means for the two motors so as to decrease the speed of the faster motor and increase the speed of the slower. The invention is shown applied to the actuation of an aircraft control surface from a pilot's control column. The latter is connected through a linkage 19 to the ends of two floating levers 15 which are fulcrummed on pivoted cranks 9 and are connected at their other ends to the pistons of jacks 1, 2 so that movement of the pilot's control column causes, initially, cranks 9 to make the small movements allowed by stops 12, 14. Such movement is imparted through togglelinks 37, 39 to hydraulically-operated servo-mechanisms 7, 8 which control variable-delivery hydraulic pumps 5, 6 of the rotating radial piston type, the output of the pumps being to the jacks 1, 2. The pistons of the latter are connected through a rocking arm 3 and a push-pull device 4 to the aircraft control surface. The movement of the jack pistons is repeated back to the floating levers 15 through levers 20, 21, and links 17. The pressure-fluid supply for the servo-mechanisms 7, 8 is obtained from separate banks of pistons in the pumps 5, 6, such banks being spring-loaded into an eccentric position. Levers 20, 21 are connected to the input members 24, 27, respectively, of a differential, the lever 21 being connected through gearing 25 so that, on movement of the jack pistons, the members 24, 27 rotate in opposite directions. Should the speeds of the two pistons be out of alignment, the difference will be detected by the planet carrier 28 and communicated through a pinion 31, rock shaft 32, levers 33, 34, and links 35, 36, to the mid points of the two toggle mechanisms 37, 39. As the links of the toggle mechanisms are normally biassed in opposite directions, the resultant movements imparted to the servo-mechanisms 7, 8 will be in opposite senses and the control chains will apply correcting signals to the jacks to bring their speeds into alignment again. In the event of failure of one jack, a bye-pass valve therefore, which is normally held closed by pressure from the corresponding pump, will be opened and the faulty jack will idle. The lever 3 would also be provided with a lock held in the disengaged position by pressure from the two pumps but, on failure of one system, the lock would be freed and the lever 3 thus prevented from rocking. A switch, operated from the lever 3 or from the differential gear, may be provided to switch off the slower pump in the event of the jacks becoming out of step by an excessive amount. The invention is applicable to the control of electric motors instead of hydraulic jacks, and the differential gearing may be replaced by a lever differential.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB12299/49A GB679187A (en) | 1949-05-09 | 1949-05-09 | Improvements in and relating to duplicated servomotor systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB12299/49A GB679187A (en) | 1949-05-09 | 1949-05-09 | Improvements in and relating to duplicated servomotor systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB679187A true GB679187A (en) | 1952-09-17 |
Family
ID=10001977
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB12299/49A Expired GB679187A (en) | 1949-05-09 | 1949-05-09 | Improvements in and relating to duplicated servomotor systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB679187A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180155053A1 (en) * | 2016-12-02 | 2018-06-07 | The Boeing Company | Differential for control surface actuators |
RU2763094C1 (en) * | 2021-07-30 | 2021-12-27 | Акционерное Общество "Государственное Машиностроительное Конструкторское Бюро "Радуга" Имени А.Я. Березняка" | Mechanism for actuating control surfaces |
-
1949
- 1949-05-09 GB GB12299/49A patent/GB679187A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180155053A1 (en) * | 2016-12-02 | 2018-06-07 | The Boeing Company | Differential for control surface actuators |
US10669014B2 (en) * | 2016-12-02 | 2020-06-02 | The Boeing Company | Differential for control surface actuators |
RU2763094C1 (en) * | 2021-07-30 | 2021-12-27 | Акционерное Общество "Государственное Машиностроительное Конструкторское Бюро "Радуга" Имени А.Я. Березняка" | Mechanism for actuating control surfaces |
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