GB839847A - Error reduction by additional control in servo mechanisms - Google Patents
Error reduction by additional control in servo mechanismsInfo
- Publication number
- GB839847A GB839847A GB1540656A GB1540656A GB839847A GB 839847 A GB839847 A GB 839847A GB 1540656 A GB1540656 A GB 1540656A GB 1540656 A GB1540656 A GB 1540656A GB 839847 A GB839847 A GB 839847A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shaft
- signal
- selsyn
- noise
- misalignment
- 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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D3/00—Control of position or direction
- G05D3/12—Control of position or direction using feedback
- G05D3/14—Control of position or direction using feedback using an analogue comparing device
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D3/00—Control of position or direction
- G05D3/12—Control of position or direction using feedback
- G05D3/121—Control of position or direction using feedback using synchromachines (selsyns)
- G05D3/122—Control of position or direction using feedback using synchromachines (selsyns) without modulation
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D3/00—Control of position or direction
- G05D3/12—Control of position or direction using feedback
- G05D3/121—Control of position or direction using feedback using synchromachines (selsyns)
- G05D3/124—Control of position or direction using feedback using synchromachines (selsyns) with modulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/58—Arrangements for focusing or reflecting ray or beam
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Feedback Control In General (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
839,847. Electric corresponttence control systems. HOLLANDSE SIGNAALAPPARATEN N.V. May 17, 1956, No. 15406/56. Class 40 (1). A correspondence control system for causing a receiving shaft to repeat the rotation of a transmitter shaft comprises two selsyn systems in cascade which act as LP filters to remove most of the noise content plus a proportion of the legal error signal, the latter being reintroduced by passing the misalignment signal of the first selsyn link, which will comprise both legal signal and noise, through a sharply tuned LP filter to remove the noise content, and feeding forward the remainder as an additional control signal to the second selsyn receiver. Alternatively when the mechanical servo links do not remove all the noise, the feed forward signal merely reduces the noise content. As shown (Fig. 1), the rotation of a transmitter shaft 101 attached to the A.C.-energized rotor winding 102 of a selsyn transmitter produces a misalignment signal from the receiver rotor winding 105 which is amplified at 117 to cause motor 107 to rotate shaft 106 and rotor winding 105 until shafts 106, 101 are realigned. The amplifier 117 is also fed with a ## or ## anti-hunting voltage from tachogenerator 108. The rotation of shaft 106 is transmitted via a second selsyn system to a shaft 113, the amplifier 123 for the motor 114 driving shaft 113 being fed with the misalignment signal from the second servo system, which has lost the noise and part of the legal signal from shaft 101, supplemented by the misalignment signal of the first servo system after the noise component only of the latter signal has been removed by a low-pass filter 120. A 6 or 6 anti-hunting voltage for the second selsyn link is obtained from tachogenerator 115. Hence the rotation of shaft 113 follows that of shaft 101 independently of any noise content in the value represented by the angular position of shaft 101. The correction signal for the second selsyn may be derived from the misalignment signal of the first selsyn by other means, e.g. from the tachogenerator 108, and may be applied to different forms of follow-up devices. If any modification of the misalignment signal occurs between the first and second selsyn systems, e.g. if rotor winding 109 of the second selsyn is driven by shaft 106 through an n: 1 gear, then the feed forward signal is modified in the same way, e.g. it is fed through an n: 1 step-up transformer. One embodiment (Fig. 3, not shown) shows the invention applied to a system for converting cartesian co-ordinates to polar co-ordinates. Specification 500,648 is referred to.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1540656A GB839847A (en) | 1956-05-17 | 1956-05-17 | Error reduction by additional control in servo mechanisms |
NL251995A NL104095C (en) | 1956-05-17 | 1957-04-02 | |
CH4616857A CH373091A (en) | 1956-05-17 | 1957-05-16 | Electrical transmission arrangement for at least one measured variable |
DEN13672A DE1224397B (en) | 1956-05-17 | 1957-05-17 | Slave controller |
SE358064A SE318937B (en) | 1956-05-17 | 1964-03-23 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1540656A GB839847A (en) | 1956-05-17 | 1956-05-17 | Error reduction by additional control in servo mechanisms |
Publications (1)
Publication Number | Publication Date |
---|---|
GB839847A true GB839847A (en) | 1960-06-29 |
Family
ID=10058587
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1540656A Expired GB839847A (en) | 1956-05-17 | 1956-05-17 | Error reduction by additional control in servo mechanisms |
Country Status (5)
Country | Link |
---|---|
CH (1) | CH373091A (en) |
DE (1) | DE1224397B (en) |
GB (1) | GB839847A (en) |
NL (1) | NL104095C (en) |
SE (1) | SE318937B (en) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE768109C (en) * | 1934-12-06 | 1955-08-11 | Siemens App | Device for accurate angle and speed control, in particular remote control of an object |
DE967742C (en) * | 1935-08-28 | 1957-12-12 | Aeg | Arrangement for damping machine oscillations in slave control devices |
GB500648A (en) * | 1937-05-07 | 1939-02-07 | Sperry Gyroscope Co Ltd | Improvements relating to systems for transmitting indications |
DE767721C (en) * | 1938-04-29 | 1953-04-09 | Siemens App | Device for motorized adjustment, in particular remote adjustment of an object |
DE965647C (en) * | 1950-12-05 | 1957-06-13 | Siemens Ag | Circuit with premagnetized chokes for control loops |
-
1956
- 1956-05-17 GB GB1540656A patent/GB839847A/en not_active Expired
-
1957
- 1957-04-02 NL NL251995A patent/NL104095C/xx active
- 1957-05-16 CH CH4616857A patent/CH373091A/en unknown
- 1957-05-17 DE DEN13672A patent/DE1224397B/en active Pending
-
1964
- 1964-03-23 SE SE358064A patent/SE318937B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
DE1224397B (en) | 1966-09-08 |
SE318937B (en) | 1969-12-22 |
CH373091A (en) | 1963-11-15 |
NL104095C (en) | 1963-03-15 |
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