CN102226453A - Dual-redundancy electro hydraulic servo actuator - Google Patents
Dual-redundancy electro hydraulic servo actuator Download PDFInfo
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- CN102226453A CN102226453A CN2011101692010A CN201110169201A CN102226453A CN 102226453 A CN102226453 A CN 102226453A CN 2011101692010 A CN2011101692010 A CN 2011101692010A CN 201110169201 A CN201110169201 A CN 201110169201A CN 102226453 A CN102226453 A CN 102226453A
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Abstract
The invention relates to a dual-redundancy electro hydraulic servo actuator which comprises a double-outlet rod hydraulic cylinder and a single-outlet rod hydraulic cylinder which are connected in series, wherein one end of the double-outlet rod hydraulic cylinder extends outward, and is connected with load; the rodless cavity side of the single-outlet rod hydraulic cylinder is connected with a displacement sensor; and one end of the double-outlet rod hydraulic cylinder and the rodless cavity side of the single-outlet rod hydraulic cylinder are respectively controlled by a hydraulic control system. According to the invention, the double-outlet rod hydraulic cylinder and the single-outlet rod hydraulic cylinder are adopted to form the dual-redundancy electro hydraulic servo actuator, so that the defect of large occupied space for a dual-redundancy electro hydraulic servo actuator which is composed of two double-outlet rod hydraulic cylinders in series is overcome, thus the structure is more compact, because the control on a single-outlet rod return circuit has a cold and hot oil exchange process, the system working temperature is reduced, and the system works more stably.
Description
Technical field
The present invention is relevant with electro-hydraulic servo actuator, more specifically is a kind of two rod oil hydraulic cylinders, two remaining electro-hydraulic servo actuators of asymmetric servo cylinder and hydraulic control system thereof of comprising.
Technical background
When hydraulic pressure installation is used for some important events, require hydraulic pressure installation to have certain amount of redundancy, as the employed hydraulic actuator of aircraft master flying surface, when a cover hydraulic pressure installation breaks down, another set of hydraulic pressure installation can substitute it and put into operation, makes the aircraft normal flight.In existing electro-hydraulic servo loop device, employed pair of remaining hydraulic actuator, employing be two hydraulic actuators that two rod oil hydraulic cylinders are cascadedly combined, in use the using and the reserved also can be worked simultaneously.Two oil hydraulic cylinders in the hydraulic actuator by separately power source and control unit and control system control, constitute two independently electrohydraulic servo systems respectively.In order to improve the capacity usage ratio of hydraulic servomechanism, reduce tubing length, mitigation system weight, new technology adopts closed method control two rod oil hydraulic cylinders wherein, existing corresponding patented technology [EP0271744,1988-06-22, DE3919823A1,1990-12-20], because two rod oil hydraulic cylinder two chamber flow symmetries, the fluid amount that oil hydraulic pump sucks from oil hydraulic cylinder one chamber equates that with the fluid amount that is discharged to another chamber of oil hydraulic cylinder adopt existing oil hydraulic pump, two chambeies of oil hydraulic pump oil inlet and outlet and oil hydraulic cylinder directly link to each other, operation with regard to the two rod oil hydraulic cylinders of may command, the speed of oil hydraulic cylinder is directly proportional with pump delivery and rotating speed, and it is little that such apparatus system has energy loss, the characteristics that energy efficiency is high.
But this pair of rod oil hydraulic cylinder, because piston rod is two-way to be stretched out, it is bigger to take up room, when especially the stroke of oil hydraulic cylinder is big, this shortcoming is just more outstanding, this is for requiring the small device that takes up room, and it is very worthless waiting as aircraft, and in this closed circuit, because the hydraulic oil exchange capacity is less, working long hours system temperature can be very high, and the fluid temperature rise is higher, and the hydraulic system stable operation is had a negative impact.
In the hydraulic system, hydraulic actuator more than 90% all adopts the differential hydro cylinder of single rod, because the flow in asymmetric servo cylinder two chambeies is unequal, so just can not adopt existing pair of outlet oil hydraulic pump directly to constitute closed circuit, also need some ancillary methods, perhaps the hydraulic pressure pump structure is redesigned, make the area difference of its coupling asymmetric servo cylinder, existing publication number is: the patent of invention of CN1818382A a kind of " closed electrohydraulic controlling system ", a kind of like this method just is provided, this disclosure of the Invention a kind of oil hydraulic pump of three hydraulic fluid ports, the inlet port of pump and low pressure oil sources are connected, two other actuator port is connected with two chambeies of asymmetric servo cylinder respectively, solved the unequal problem of pump control differential hydro cylinder two chamber active areas, can reduce the axial dimension of oil hydraulic cylinder, but redundant hydraulic actuator that two present two rod oil hydraulic cylinder serial connections constitute and the oil hydraulic pump that is not suitable for using this three hydraulic fluid ports.
Summary of the invention
The purpose of this invention is to provide a kind of pair of remaining electro-hydraulic servo actuator, to optimize the electro-hydraulic servo actuator structure, reduce the shared space of final controlling element, reduce the heating value of electro-hydraulic servo hydraulic system simultaneously, make electro-hydraulic servo hydraulic pressure installation working stability, safety.
To achieve these goals, a kind of pair of remaining electro-hydraulic servo actuator provided by the present invention, comprise a pair of rod oil hydraulic cylinder 1, an asymmetric servo cylinder 2, two rod oil hydraulic cylinders 1 and asymmetric servo cylinder 2 shared same cylinder bodies 21, two rod oil hydraulic cylinders 1 and asymmetric servo cylinder 2 shared same piston rods 4, piston rod 4 stretches out outside a side direction of two rod oil hydraulic cylinders 1, displacement transducer 3 is arranged in the rodless cavity of asymmetric servo cylinder 2, detects the displacement of piston rod 4.
Also include the hydraulic control system I of corresponding two rod oil hydraulic cylinders 1 and the hydraulic control system II of asymmetric servo cylinder 2.
In technique scheme, described hydraulic control system I is a kind of of Closed Hydraulic control system and open hydraulic control system, two hydraulic fluid ports that its described Closed Hydraulic control system is a bidirectional hydraulic pump 8 are by the first two four-way electromagnetic reversing valves 11, be connected with two chambeies of two rod oil hydraulic cylinders 1 respectively, the running shaft of bidirectional hydraulic pump 8 is connected with the output shaft of first actuating motor 9 through coupling, and the output signal of first controller 5 is connected to the control end of first actuating motor 9; Its described open hydraulic control system is that pressure oil is connected with electrohydraulic control 22 with fuel tank 24, electrohydraulic control 22 is by the first two four-way electromagnetic reversing valves 11, respectively with two rod oil hydraulic cylinders 1 two chambeies be connected, the output signal of the 3rd controller 23 is connected with the control end of electrohydraulic control 22; Described hydraulic control system II is the Closed Hydraulic control system, the inlet port of three hydraulic fluid port oil hydraulic pumps 13 is connected with second accumulator 17, two other hydraulic fluid port is by the second two four-way electromagnetic reversing valves 19, be connected with two chambeies of asymmetric servo cylinder 2 respectively, the running shaft of three hydraulic fluid port oil hydraulic pumps 13 is connected with the output shaft of second actuating motor 16 through coupling, and the output signal of second controller 12 is connected to the control end of second actuating motor 16; Can be marked with scale on the piston rod 4 of the described pair of rod oil hydraulic cylinder 1 and asymmetric servo cylinder 2; Described first accumulator 6 and second accumulator 17 are a kind of in pressure type fuel tank and the accumulator; Described bidirectional hydraulic pump 8 is a kind of in the two-way change displacement hydraulic pump of quantitative hydraulic pump and proportional control; Described three hydraulic fluid port oil hydraulic pumps 13 are a kind of in the two-way change discharge capacity axial piston pump of quantitative hydraulic pump and proportional control; Described hydraulic control system I is a kind of in the open circuit of the closed circuit of oil hydraulic pump control and servovalve control.
A kind of pair of remaining electro-hydraulic servo actuator of the present invention, compared with prior art, employing is composed in series by the oil hydraulic cylinder of a double piston-rod and the oil hydraulic cylinder of a single-piston rod, compare with the final controlling element that the oil hydraulic cylinder serial connection of existing two double piston-rods constitutes, can save axial space 1/3rd, particularly evident for big stroke hydraulic cylinder effect, this is very important for the little equipment that takes up room as requirements such as aircraft.Two remaining electro-hydraulic servo actuators that the present invention adopts, owing to adopted a oil hydraulic cylinder, compared the closed circuit of the oil hydraulic cylinder composition of double piston-rod, owing to there is the exchange of cold and hot oil with single-piston rod, reduce the operating temperature of system, made system works safer, stable.
Description of drawings
Fig. 1 is the structural representation of the two remaining electro-hydraulic servo actuators of the present invention and the hydraulic control system schematic diagram of the two remaining electro-hydraulic servo actuators of the present invention.
Fig. 2 is the structural representation of the two remaining electro-hydraulic servo actuators of the present invention and the another kind of hydraulic control system schematic diagram of the two remaining electro-hydraulic servo actuators of the present invention.
Among the figure: 1: two rod oil hydraulic cylinders; 2: asymmetric servo cylinder; 3: displacement transducer; 4: piston rod; 5: the first controllers; 6: the first accumulators; 7: the first one-way valves; 8: the bidirectional hydraulic pump; 9: the first actuating motors; 10: the second one-way valves; 11: the first two four-way electromagnetic reversing valves; 12: the second controllers; 13: three hydraulic fluid port oil hydraulic pumps; 14: the first Pilot operated check valves; 15: the first relief valves; 16: the second actuating motors; 17: the second accumulators; 18: the second Pilot operated check valves; 19: the second two four-way electromagnetic reversing valves; 20: the second relief valves; 21: cylinder body; 22: electrohydraulic control; 23: the three controllers; 24: fuel tank.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is further detailed.
Mode of execution 1
Implement a kind of pair of remaining electro-hydraulic servo actuator of the present invention, comprise two rod oil hydraulic cylinders 1 and hydraulic control system I, asymmetric servo cylinder 2 and hydraulic control system II thereof.
As shown in Figure 1: two remaining electro-hydraulic servo actuators are composed in series by two rod oil hydraulic cylinders 1 and an asymmetric servo cylinder 2, two rod oil hydraulic cylinders 1 and asymmetric servo cylinder 2 shared same cylinder bodies 21, two rod oil hydraulic cylinders 1 and asymmetric servo cylinder 2 shared same piston rods 4, piston rod 4 stretches out outside a side direction of two rod oil hydraulic cylinders 1, can be marked with the scale of its overhang of indication on the piston rod 4, displacement transducer 3 is arranged in the rodless cavity of asymmetric servo cylinder 2, detects the displacement of piston rod 4; Two rod oil hydraulic cylinders 1 are same loads with asymmetric servo cylinder 2 drivings, and the using and the reserved in the use also can be worked simultaneously; The hydraulic control system I of a kind of pair of rod oil hydraulic cylinder 1 is as shown in Figure 1: hydraulic control system is a closed type hydraulic system, form by bidirectional hydraulic pump 8, first actuating motor 9, first one-way valve 7 and second one-way valve 10, the first two four-way electromagnetic reversing valves 11, first accumulator 6, first controllers 5, the running shaft of bidirectional hydraulic pump 8 is connected with the output shaft of first actuating motor 9 through coupling, and two outlets of bidirectional hydraulic pump 8 are by pipeline and the first two four-way electromagnetic reversing valves 11
Mouthful,
Mouthful connect, the first two logical four solenoid directional control valves 11
Mouthful,
Mouth is connected with two chambeies of two rod oil hydraulic cylinders 1 respectively, the outlet of the outlet of first one-way valve 7 and second one-way valve 10 is connected with two outlets of bidirectional hydraulic pump 8 respectively, the import of the import of first one-way valve 7 and second one-way valve 10 is connected with first accumulator 6, first one-way valve 7 and second one-way valve 10 are connected in parallel with two rod oil hydraulic cylinders 1 simultaneously, the displacement signal of two rod oil hydraulic cylinders 1 is detected by displacement transducer 3 and is connected with first controller 5, input instruction signal is connected with first controller 5, first actuating motor, 9 tach signals are connected with first controller 5, first controller, 5 output signals are connected with the control end of first actuating motor 9, control the rotating speed and the direction of first actuating motor 9; The hydraulic control system II of asymmetric servo cylinder 2 is as shown in Figure 1: by three hydraulic fluid port oil hydraulic pumps 13, second actuating motor 16, first Pilot operated check valve 14 and second Pilot operated check valve 18, first relief valve 15 and second relief valve 20, the second two four-way electromagnetic reversing valves 19, second accumulator 17, second controller 12 is formed, the running shaft of three hydraulic fluid port oil hydraulic pumps 13 is connected with the output shaft of second actuating motor 16 through coupling, three hydraulic fluid port oil hydraulic pumps 13
Outlet is connected with second accumulator 17, three hydraulic fluid port oil hydraulic pumps 13
,
Outlet by pipeline respectively with the second two four-way electromagnetic reversing valves 19
Mouthful,
Mouthful connect, the second two four-way electromagnetic reversing valves 19
Mouthful,
Mouth is connected with rodless cavity with the rod chamber of asymmetric servo cylinder 2 respectively, first Pilot operated check valve 14
The mouth and second Pilot operated check valve 18
Mouth is connected with rodless cavity with the rod chamber of asymmetric servo cylinder 2 respectively, first Pilot operated check valve 14
The mouth and second Pilot operated check valve 18
Mouth is connected the control port of first Pilot operated check valve 14 with second accumulator 17
And the control port of second Pilot operated check valve 18
Be connected with rod chamber with the rodless cavity of asymmetric servo cylinder 2 respectively, the import of first relief valve 15 is connected with rodless cavity with the rod chamber of asymmetric servo cylinder 2 respectively with outlet, the import of second relief valve 20 is connected with rod chamber with the rodless cavity of asymmetric servo cylinder 2 respectively with outlet, the displacement signal of asymmetric servo cylinder 2 is detected by displacement transducer 3 and is connected with second controller 12, input instruction signal is connected with second controller 12, second actuating motor, 16 tach signals are connected with second controller 12, the output signal of second controller 12 is connected with the control end of second actuating motor 16, controls the rotating speed and the direction of second actuating motor 16.
Mode of execution 2
The present invention's a kind of pair of remaining electro-hydraulic servo actuator of the present invention another kind of hydraulic control system as shown in Figure 2: the another kind of hydraulic control system I of two rod oil hydraulic cylinders 1 is as shown in Figure 2, adopt the open hydraulic control system, be made up of electrohydraulic control 22, the first two four-way electromagnetic reversing valves 11, the 3rd controller 23, fuel tanks 24, pressure oil and fuel tank 24 are respectively with electrohydraulic control 22
Mouthful and
Mouth connects, electrohydraulic control 22
Mouthful,
Mouth is respectively with the first two four-way electromagnetic reversing valves 11
Mouthful,
Mouthful connect, the first two four-way electromagnetic reversing valves 11
Mouthful,
The mouth respectively with two rod oil hydraulic cylinders 1 two chambeies be connected, the displacement signal of two rod oil hydraulic cylinders 1 is detected by displacement transducer 3 and is connected with the 3rd controller 23, input instruction signal is connected with the 3rd controller 23, and the output signal of the 3rd controller 23 is connected with the control end of electrohydraulic control 22; The hydraulic control system II of asymmetric servo cylinder 2 is as shown in Figure 1: by three hydraulic fluid port oil hydraulic pumps 13, second actuating motor 16, first Pilot operated check valve 14 and second Pilot operated check valve 18, first relief valve 15 and second relief valve 20, the second two four-way electromagnetic reversing valves 19, second accumulator 17, second controller 12 is formed, the running shaft of three hydraulic fluid port oil hydraulic pumps 13 is connected with the output shaft of second actuating motor 16 through coupling, three hydraulic fluid port oil hydraulic pumps 13
Outlet is connected with second accumulator 17, three hydraulic fluid port oil hydraulic pumps 13
,
Outlet by pipeline respectively with the second two four-way electromagnetic reversing valves 19
Mouthful,
Mouthful connect, the second two four-way electromagnetic reversing valves 19
Mouthful,
Mouth is connected with rodless cavity with the rod chamber of asymmetric servo cylinder 2 respectively, first Pilot operated check valve 14
The mouth and second Pilot operated check valve 18
Mouth is connected with rodless cavity with the rod chamber of asymmetric servo cylinder 2 respectively, first Pilot operated check valve 14
The mouth and second Pilot operated check valve 18
Mouth is connected the control port of first Pilot operated check valve 14 with second accumulator 17
And the control port of second Pilot operated check valve 18
Be connected with rod chamber with the rodless cavity of asymmetric servo cylinder 2 respectively, the import of first relief valve 15 is connected with rodless cavity with the rod chamber of asymmetric servo cylinder 2 respectively with outlet, the import of second relief valve 20 is connected with rod chamber with the rodless cavity of outlet difference asymmetric servo cylinder 2, the displacement signal of asymmetric servo cylinder 2 is detected by displacement transducer 3 and is connected with second controller 12, input instruction signal is connected with second controller 12, second actuating motor, 16 tach signals are connected with second controller 12, the output signal of second controller 12 is connected with the control end of second actuating motor 16, controls the rotating speed and the direction of second actuating motor 16.
Claims (10)
1. two remaining electro-hydraulic servo actuator, comprise two rod oil hydraulic cylinders (1), asymmetric servo cylinder (2), described pair of rod oil hydraulic cylinder (1) and the shared same cylinder body of asymmetric servo cylinder (2) (21), described pair of rod oil hydraulic cylinder (1) and the shared same piston rod of asymmetric servo cylinder (2) (4), described piston rod (4) stretches out outside a side direction of two rod oil hydraulic cylinders (1), displacement transducer (3) is arranged on the rodless cavity of asymmetric servo cylinder (2), detects the displacement of piston rod (4);
Also include the hydraulic control system I of corresponding two rod oil hydraulic cylinders (1) and the hydraulic control system II of asymmetric servo cylinder (2).
2. as claimed in claim 1 pair of remaining electro-hydraulic servo actuator, its described hydraulic control system I is a kind of of Closed Hydraulic control system and open hydraulic control system.
3. as claimed in claim 2 pair of remaining electro-hydraulic servo actuator, two hydraulic fluid ports that its described Closed Hydraulic control system is a bidirectional hydraulic pump (8) are by the first two four-way electromagnetic reversing valves (11), two chambeies with two rod oil hydraulic cylinders (1) are connected respectively, the running shaft of bidirectional hydraulic pump (8) is connected with the output shaft of first actuating motor (9) through coupling, and the output signal of first controller (5) is connected to the control end of first actuating motor (9).
4. as claimed in claim 2 pair of remaining electro-hydraulic servo actuator, its described open hydraulic control system is that pressure oil is connected with electrohydraulic control (22) with fuel tank (24), electrohydraulic control (22) is by the first two four-way electromagnetic reversing valves (11), respectively with two rod oil hydraulic cylinders (1) two chambeies be connected, the output signal of the 3rd controller (23) is connected with the control end of electrohydraulic control (22).
5. as claimed in claim 1 pair of remaining electro-hydraulic servo actuator, its described hydraulic control system II is the Closed Hydraulic control system, the inlet port of three hydraulic fluid port oil hydraulic pumps (13) is connected with second accumulator (17), two other hydraulic fluid port is by the second two four-way electromagnetic reversing valves (19), two chambeies with asymmetric servo cylinder (2) are connected respectively, the running shaft of three hydraulic fluid port oil hydraulic pumps (13) is connected with the output shaft of second actuating motor (16) through coupling, and the output signal of second controller (12) is connected to the control end of second actuating motor (16).
6. as claimed in claim 1 pair of remaining electro-hydraulic servo actuator can be marked with scale on the piston rod (4) of its described pair of rod oil hydraulic cylinder (1) and asymmetric servo cylinder (2).
7. as claimed in claim 1 pair of remaining electro-hydraulic servo actuator, its described first accumulator (6) and second accumulator (17) are a kind of in pressure type fuel tank and the accumulator.
8. as claimed in claim 1 pair of remaining electro-hydraulic servo actuator, its described bidirectional hydraulic pump (8) are a kind of in the two-way change displacement hydraulic pump of quantitative hydraulic pump and proportional control.
9. as claimed in claim 1 pair of remaining electro-hydraulic servo actuator, a kind of in the two-way change discharge capacity axial piston pump that its described three hydraulic fluid port oil hydraulic pumps (13) are quantitative hydraulic pump and proportional control.
10. as claimed in claim 1 pair of remaining electro-hydraulic servo actuator, its described hydraulic control system I are a kind of in the open circuit of the closed circuit of oil hydraulic pump control and servovalve control.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588382A (en) * | 2012-03-19 | 2012-07-18 | 北京航空航天大学 | Direct-drive electro-hydraulic actuator |
| CN103410808A (en) * | 2013-07-17 | 2013-11-27 | 丽水中德石化设备有限公司 | Intrinsic safety type fire-proof and explosion-proof electro-hydraulic actuator and control method thereof |
| CN103573738A (en) * | 2012-08-03 | 2014-02-12 | 波音公司 | Methods and apparatus to control movement of a component |
| CN103953591A (en) * | 2014-04-25 | 2014-07-30 | 哈尔滨飞机工业集团有限责任公司 | Helicopter hydraulically controlled propellant system |
| CN105298966A (en) * | 2015-11-20 | 2016-02-03 | 江南阀门有限公司 | Monitoring and controlling system and control method of piston type adjusting valve |
| CN105443451A (en) * | 2015-12-07 | 2016-03-30 | 北京精密机电控制设备研究所 | Kilowatt-level rock output three-redundancy electro-hydraulic digital servo system |
| CN105523197A (en) * | 2014-10-27 | 2016-04-27 | 北京精密机电控制设备研究所 | Triple-redundancy digital servo system for quickly responding to 10kW-grade linear output |
| CN105570237A (en) * | 2014-10-31 | 2016-05-11 | 北京精密机电控制设备研究所 | Dual-redundancy electro-hydrostatic servo mechanism |
| CN106369004A (en) * | 2016-09-12 | 2017-02-01 | 天津大学 | Integrated motor-pump-control single-piston rod symmetrical hydraulic cylinder with built-in displacement sensor |
| CN107091253A (en) * | 2017-06-29 | 2017-08-25 | 杭州和利时自动化有限公司 | A kind of hydraulic pressure performs equipment |
| CN107989858A (en) * | 2017-11-24 | 2018-05-04 | 太原理工大学 | The double actuator electrohydraulic servo system position pressure bonding control methods of series connection |
| CN109616001A (en) * | 2018-12-11 | 2019-04-12 | 上海应用技术大学 | Electro-hydraulic position servo system experimental bench |
| CN110397634A (en) * | 2019-07-17 | 2019-11-01 | 太原理工大学 | A kind of low energy consumption high dynamic pump valve co-location servo-system and its control method |
| CN112324719A (en) * | 2020-11-04 | 2021-02-05 | 北京自动化控制设备研究所 | Redundancy electro-hydrostatic actuating system and control method |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588382B (en) * | 2012-03-19 | 2014-11-26 | 北京航空航天大学 | Direct-drive electro-hydraulic actuator |
| CN102588382A (en) * | 2012-03-19 | 2012-07-18 | 北京航空航天大学 | Direct-drive electro-hydraulic actuator |
| CN103573738A (en) * | 2012-08-03 | 2014-02-12 | 波音公司 | Methods and apparatus to control movement of a component |
| US10309431B2 (en) | 2012-08-03 | 2019-06-04 | The Boeing Company | Methods and apparatus to control movement of a component |
| CN103410808A (en) * | 2013-07-17 | 2013-11-27 | 丽水中德石化设备有限公司 | Intrinsic safety type fire-proof and explosion-proof electro-hydraulic actuator and control method thereof |
| CN103410808B (en) * | 2013-07-17 | 2015-07-15 | 丽水中德石化设备有限公司 | Intrinsic safety type fire-proof and explosion-proof electro-hydraulic actuator and control method thereof |
| CN103953591A (en) * | 2014-04-25 | 2014-07-30 | 哈尔滨飞机工业集团有限责任公司 | Helicopter hydraulically controlled propellant system |
| CN105523197A (en) * | 2014-10-27 | 2016-04-27 | 北京精密机电控制设备研究所 | Triple-redundancy digital servo system for quickly responding to 10kW-grade linear output |
| CN105570237B (en) * | 2014-10-31 | 2019-02-26 | 北京精密机电控制设备研究所 | A kind of double redundancy electromechanical static pressure servo mechanism |
| CN105570237A (en) * | 2014-10-31 | 2016-05-11 | 北京精密机电控制设备研究所 | Dual-redundancy electro-hydrostatic servo mechanism |
| CN105298966A (en) * | 2015-11-20 | 2016-02-03 | 江南阀门有限公司 | Monitoring and controlling system and control method of piston type adjusting valve |
| CN105443451A (en) * | 2015-12-07 | 2016-03-30 | 北京精密机电控制设备研究所 | Kilowatt-level rock output three-redundancy electro-hydraulic digital servo system |
| CN106369004A (en) * | 2016-09-12 | 2017-02-01 | 天津大学 | Integrated motor-pump-control single-piston rod symmetrical hydraulic cylinder with built-in displacement sensor |
| CN106369004B (en) * | 2016-09-12 | 2018-03-13 | 天津大学 | Inbuilt displacement sensor integrated electric pump control list rod symmetrical hydraulic cylinder |
| CN107091253A (en) * | 2017-06-29 | 2017-08-25 | 杭州和利时自动化有限公司 | A kind of hydraulic pressure performs equipment |
| CN107989858A (en) * | 2017-11-24 | 2018-05-04 | 太原理工大学 | The double actuator electrohydraulic servo system position pressure bonding control methods of series connection |
| CN107989858B (en) * | 2017-11-24 | 2019-11-05 | 太原理工大学 | The double actuator electrohydraulic servo system positions pressure bonding control methods of series connection |
| CN109616001A (en) * | 2018-12-11 | 2019-04-12 | 上海应用技术大学 | Electro-hydraulic position servo system experimental bench |
| CN110397634A (en) * | 2019-07-17 | 2019-11-01 | 太原理工大学 | A kind of low energy consumption high dynamic pump valve co-location servo-system and its control method |
| CN112324719A (en) * | 2020-11-04 | 2021-02-05 | 北京自动化控制设备研究所 | Redundancy electro-hydrostatic actuating system and control method |
| CN112324719B (en) * | 2020-11-04 | 2023-07-14 | 北京自动化控制设备研究所 | Redundancy electro-hydrostatic actuation system and control method |
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Application publication date: 20111026 Assignee: Shanxi Shiwopu Electrical Equipment Co. Ltd. Assignor: Taiyuan University of Technology Contract record no.: 2018140000010 Denomination of invention: Dual-redundancy electro hydraulic servo actuator Granted publication date: 20140430 License type: Common License Record date: 20181211 |