CN108958305A - One kind 8421 encodes the accurate control structure of flow-controllable high-pressure gas pressure - Google Patents
One kind 8421 encodes the accurate control structure of flow-controllable high-pressure gas pressure Download PDFInfo
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- CN108958305A CN108958305A CN201710367311.5A CN201710367311A CN108958305A CN 108958305 A CN108958305 A CN 108958305A CN 201710367311 A CN201710367311 A CN 201710367311A CN 108958305 A CN108958305 A CN 108958305A
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- pressure
- frequency electromagnetic
- electromagnetic valve
- restricting orifice
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/20—Control of fluid pressure characterised by the use of electric means
- G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
- G05D16/2066—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using controlling means acting on the pressure source
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The invention belongs to pressure measurement technical fields, and in particular to one kind 8421 encodes the accurate control structure of flow-controllable high-pressure gas pressure.The both ends of high pressure connection line are respectively air source inlet and high-pressure output port, inlet pressure transducer is provided at air source inlet, outlet pressure sensor is provided at high-pressure output port, high-pressure connecting pipe road is provided with 4# high-frequency electromagnetic valve and 4# restricting orifice, it is in parallel with 4# high-frequency electromagnetic valve and 4# restricting orifice to be additionally provided with three groups of high-frequency electromagnetic valves and restricting orifice, respectively 3# high-frequency electromagnetic valve and 3# restricting orifice, 2# high-frequency electromagnetic valve and 2# restricting orifice, 1# high-frequency electromagnetic valve and 1# restricting orifice, controller passes through control 4# high-frequency electromagnetic valve, 3# high-frequency electromagnetic valve, 2# high-frequency electromagnetic valve and 1# high-frequency electromagnetic valve adjust flow and pressure.High-pressure gas flow control can be achieved in adjustment process and stablize by the present invention, reproducible；Pressure controling precision is high, non-overshoot amount, fast response time.
Description
Technical field
The invention belongs to pressure measurement technical fields, and in particular to one kind 8421 encodes flow-controllable high-pressure gas pressure essence
True control structure.
Background technique
Currently, common automatic pressure regulative mode be PID adjust, by adjuster by the measured value of production process parameters with
Given value is compared, and generates output signal according to certain Rule adjusting after must deviating and actuator is pushed to eliminate departure,
Make the parameter be maintained at given value nearby or by predetermined rule to change.The output of ordinary circumstance adjuster is a step control letter
Number come control to adjust valve etc. execute equipment.In order to keep the governing response time quick, proportional integral differential is combined into adjusting one
Reasonable parameter achievees the purpose that control.During pressure regulation, no matter parameter setting how rationally, PID regulative mode is all
An oscillatory process can be undergone before adjustment process reaches setting value, there are over controls for goal pressure.Hold when by test products
When product is smaller, which is particularly acute.It is all to increase in the equipment tested due to majority of case by zero pressure
, after set target pressure, at this moment feedback signal value is zero, and comparing deviation is maximum value.Then adjuster output is very big, adjusts
Section valve and other actuators can open to the maximum aperture at this time.Then feedback pressure is possible to meeting rapid increase, just reaches in moment
Target pressure value.Output is zero immediately for adjuster output, but since the response speed of actuator is not achieved again, feedback pressure is fast
Speed rises, and then just will appear pressure overshoot.
In space industry, for certain products when carrying out air seal test, product is not allow superpressure, otherwise can be due to production
Quality causes a hidden trouble, and leads to scrap of the product.Therefore the prior art is not able to satisfy certain space product test demands, there is an urgent need to
The accurate control structure of new high-pressure gas pressure adapts to new test demand.
Summary of the invention
The purpose of the present invention is to provide one kind 8421 to encode the accurate control structure of flow-controllable high-pressure gas pressure, can have
Effect avoids system overpressure, and has many advantages, such as regulation precision height, fast response time.
In order to achieve the above objectives, the technical solution used in the present invention are as follows:
One kind 8421 encodes the accurate control structure of flow-controllable high-pressure gas pressure, including air source inlet, inlet pressure pass
Sensor, high pressure connection line, outlet pressure sensor, high-pressure output port, 4# restricting orifice, 4# high-frequency electromagnetic valve, 3# throttle orifice
Plate, 3# high-frequency electromagnetic valve, 2# restricting orifice, 2# high-frequency electromagnetic valve, 1# restricting orifice, 1# high-frequency electromagnetic valve and controller；High pressure
The both ends of connecting line are respectively air source inlet and high-pressure output port, and inlet pressure transducer, high pressure are provided at air source inlet
Equipped at outlet port is provided with outlet pressure sensor, and high-pressure connecting pipe road is provided with 4# high-frequency electromagnetic valve and 4# restricting orifice, separately
It is in parallel with 4# high-frequency electromagnetic valve and 4# restricting orifice that it is additionally provided with three groups of high-frequency electromagnetic valves and restricting orifice outside, respectively 3# high frequency
Solenoid valve and 3# restricting orifice, 2# high-frequency electromagnetic valve and 2# restricting orifice, 1# high-frequency electromagnetic valve and 1# restricting orifice, controller are logical
Control 4# high-frequency electromagnetic valve, 3# high-frequency electromagnetic valve, 2# high-frequency electromagnetic valve and 1# high-frequency electromagnetic valve are crossed to adjust flow and pressure.
When carrying out flow adjusting, medium gas source is connect with air source inlet, test products are connect with high-pressure output port, are opened
Movement controller, and set adjust target mark condition flow, controller according to 4# restricting orifice, 3# restricting orifice, 2# restricting orifice and
The orifice size and air source inlet calculation of pressure of 1# restricting orifice control coding, send 4# high-frequency electromagnetic valve, 3# high-frequency electromagnetic valve,
2# high-frequency electromagnetic valve and 1# high-frequency electromagnetic valve action command, in adjustment process, controller is according to inlet pressure transducer and outlet
The variation of pressure sensor adjusts control coding in real time, realizes high-pressure gas flow stability contorting.
When carrying out pressure adjusting, medium gas source is connect with air source inlet, test products are connect with high-pressure output port, are opened
Movement controller, and adjusting goal pressure is set, when starting pressure regulation, controller is according to adjusting goal pressure, inlet pressure transducer
Control coding is calculated with the detected value of outlet pressure sensor, when outlet pressure sensor pressure is zero, control is encoded to
0001, only 1# high-frequency electromagnetic valve events, actuation time are high-frequency electromagnetic valve Best-case Response Time T, in the process, gas at this time
Low-pressure end is flowed to by high-voltage end, i.e., by left side through 1# high-frequency electromagnetic valve and 1# restricting orifice flow direction right side；Controller passes through outlet
The variable quantity and 1# high-frequency electromagnetic valve actuation time T of pressure sensor carry out coding calculating, obtain valve group movement coding, and to 4#
High-frequency electromagnetic valve, 3# high-frequency electromagnetic valve, 2# high-frequency electromagnetic valve and the instruction of 1# high-frequency electromagnetic valve sending action, until outlet pressure passes
Sensor detected value reaches setting and adjusts goal pressure, realizes high pressure gas quick response, the control of non-overshoot amount.
The controller control valve group movement is specific as follows: the first step, 1# high-frequency electromagnetic valve is with high-frequency electromagnetic valve minimum
The movement of response time T is primary, and digital coding is 0001 at this time, and controller carries out digital coding according to high-pressure output port pressure change
It calculates, obtains second step valve group movement coding；Second step calculates the valve group obtained according to previous step and acts coding, and operation is corresponding
High-frequency electromagnetic valve events, after a scan period, controller carries out digital coding calculating according to high-pressure output port pressure change, obtains
Take third step valve group movement coding；N step calculates the valve group obtained according to (N-1) step and acts coding, operates corresponding high-frequency electrical
Magnet valve movement, after a scan period, controller carries out digital coding calculating according to high-pressure output port pressure change, obtains (N
+ 1) step valve group movement coding；Above procedure is repeated, until high-pressure output port pressure value, which reaches, adjusts goal pressure requirement, at this time
Digital coding should be 0000, and pressure regulation process terminates.
It is obtained by the present invention to have the beneficial effect that
High-pressure gas flow control can be achieved in adjustment process and stablize by the present invention, reproducible；Pressure controling precision is high,
Non-overshoot amount, fast response time.
Detailed description of the invention
Fig. 1 is the 8421 coding accurate control structure schematic diagrames of flow-controllable high-pressure gas pressure；
In figure: 1, air source inlet；2, inlet pressure transducer；3, high pressure connection line；4, outlet pressure sensor；5, high
Press delivery outlet；6,4# restricting orifice；7,4# high-frequency electromagnetic valve；8,3# restricting orifice；9,3# high-frequency electromagnetic valve；10,2# throttle orifice
Plate；11,2# high-frequency electromagnetic valve；12,1# restricting orifice；13,1# high-frequency electromagnetic valve；14, controller.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, the 8421 coding accurate control structure of flow-controllable high-pressure gas pressure of the present invention includes gas source
Entrance 1, inlet pressure transducer 2, high pressure connection line 3, outlet pressure sensor 4, high-pressure output port 5,4# restricting orifice 6,
4# high-frequency electromagnetic valve 7,3# restricting orifice 8,3# high-frequency electromagnetic valve 9,2# restricting orifice 10,2# high-frequency electromagnetic valve 11,1# throttle orifice
Plate 12,1# high-frequency electromagnetic valve 13, controller 14；The both ends of high pressure connection line 3 are respectively air source inlet 1 and high-pressure output port 5,
It is provided with inlet pressure transducer 2 at air source inlet 1, outlet pressure sensor 4, high pressure connection are provided at high-pressure output port 5
It is provided with 4# high-frequency electromagnetic valve 7 and 4# restricting orifice 6 on pipeline 3, is additionally provided with three groups of high-frequency electromagnetic valves and restricting orifice
It is in parallel with 4# high-frequency electromagnetic valve 7 and 4# restricting orifice 6, respectively 3# high-frequency electromagnetic valve 9 and 3# restricting orifice 8,2# high-frequency electromagnetic
Valve 11 and 2# restricting orifice 10,1# high-frequency electromagnetic valve 13 and 1# restricting orifice 12, controller 14 pass through control 4# high-frequency electromagnetic valve
7,3# high-frequency electromagnetic valve 9,2# high-frequency electromagnetic valve 11 and 1# high-frequency electromagnetic valve 13 adjust flow and pressure.
If high-frequency electromagnetic valve Best-case Response Time is T, if the sectional area of 4# restricting orifice 6 is S4,3# restricting orifice 8 is cut
Area is S3, and the sectional area of 2# restricting orifice 10 is S2, and the sectional area of 1# restricting orifice 12 is S1, should have relational expression:
S4=2 × S3=4 × S2=8 × S1
1, when carrying out flow adjusting, pressure difference need to meet critical flow requirement before and after restricting orifice, so that passing through the orifice plate that shuts off
Gas flow rate reaches velocity of sound.Flow meets following formula at this time:
Q=S × v
Wherein: Q --- operating condition flow；S --- orifice plate circulation area of shutting off；V --- critical flow velocity, 340m/s.Firstly, will
Medium gas source is connect with air source inlet 1, and test products are connect with high-pressure output port 5.Start controller 14, and sets adjusting mesh
Mark mark condition flow.Controller 14 according to 4# restricting orifice 6,3# restricting orifice 8,2# restricting orifice 10 and 1# restricting orifice 12 section
Flow area and air source inlet calculation of pressure control coding, send 4# high-frequency electromagnetic valve 7,3# high-frequency electromagnetic valve 9,2# high-frequency electromagnetic valve
11 and 1# high-frequency electromagnetic valve, 13 action command.In adjustment process, controller 14 is passed according to inlet pressure transducer 2 and outlet pressure
The variation of sensor 4 adjusts control coding in real time, realizes high-pressure gas flow stability contorting.
2, when carrying out pressure adjusting, bleed pressure, which need to meet, adjusts goal pressure requirement.
Firstly, medium gas source is connect with air source inlet 1, test products are connect with high-pressure output port 5.Start controller
14, and set adjusting goal pressure.When starting pressure regulation, controller 14 is according to adjusting goal pressure, inlet pressure transducer 2 and goes out
Mouth 4 detected value of pressure sensor calculates control coding, and when 4 pressure of outlet pressure sensor is zero, control is encoded to 0001, this
When only 1# high-frequency electromagnetic valve 13 act, actuation time be high-frequency electromagnetic valve Best-case Response Time T.In the process, gas is by height
Pressure side flows to low-pressure end, i.e., as shown in Figure 1, by left side through 1# high-frequency electromagnetic valve 13 and the flow direction of 1# restricting orifice 12 right side.Secondly,
Controller 14 carries out coding calculating by the variable quantity and 1# high-frequency electromagnetic valve 13 actuation time T of outlet pressure sensor 4, obtains
Valve group movement coding, and 4# high-frequency electromagnetic valve 7,3# high-frequency electromagnetic valve 9,2# high-frequency electromagnetic valve 11 and 1# high-frequency electromagnetic valve 13 are sent out
Action command is sent, until 4 detected value of outlet pressure sensor reaches setting and adjusts goal pressure, realizes that high pressure gas is quickly rung
It answers, the control of non-overshoot amount.
The first step, 1# high-frequency electromagnetic valve 13 is primary with Best-case Response Time T movement, and digital coding should be 0001 at this time, control
Device 14 processed carries out digital coding calculating according to 5 pressure change of high-pressure output port, obtains second step valve group movement coding.
Second step calculates the valve group obtained according to previous step and acts coding, operates corresponding high-frequency electromagnetic valve events, one is swept
After retouching the period, controller 14 carries out digital coding calculating according to 5 pressure change of high-pressure output port, obtains the movement of third step valve group and compiles
Code.
……
N step calculates the valve group obtained according to (N-1) step and acts coding, operates corresponding high-frequency electromagnetic valve events, and one
After scan period, controller 14 carries out digital coding calculating according to 5 pressure change of high-pressure output port, obtains (N+1) step valve group
Movement coding.
Above procedure is repeated, until 5 pressure value of high-pressure output port, which reaches, adjusts goal pressure requirement, digital coding is answered at this time
It is 0000, pressure regulation process terminates.
Claims (4)
1. one kind 8421 encodes the accurate control structure of flow-controllable high-pressure gas pressure, it is characterised in that: including air source inlet
(1), inlet pressure transducer (2), high pressure connection line (3), outlet pressure sensor (4), high-pressure output port (5), 4# throttling
Orifice plate (6), 4# high-frequency electromagnetic valve (7), 3# restricting orifice (8), 3# high-frequency electromagnetic valve (9), 2# restricting orifice (10), 2# high-frequency electrical
Magnet valve (11), 1# restricting orifice (12), 1# high-frequency electromagnetic valve (13) and controller (14)；The both ends of high pressure connection line (3) point
Not Wei air source inlet (1) and high-pressure output port (5), be provided with inlet pressure transducer (2), High voltage output at air source inlet (1)
It is provided with outlet pressure sensor (4) at mouth (5), 4# high-frequency electromagnetic valve (7) and 4# throttling is provided on high pressure connection line (3)
Orifice plate (6) is additionally provided with three groups of high-frequency electromagnetic valves and restricting orifice and 4# high-frequency electromagnetic valve (7) and 4# restricting orifice (6)
Parallel connection, respectively 3# high-frequency electromagnetic valve (9) and 3# restricting orifice (8), 2# high-frequency electromagnetic valve (11) and 2# restricting orifice (10), 1#
High-frequency electromagnetic valve (13) and 1# restricting orifice (12), controller (14) pass through control 4# high-frequency electromagnetic valve (7), 3# high-frequency electromagnetic valve
(9), 2# high-frequency electromagnetic valve (11) and 1# high-frequency electromagnetic valve (13) adjust flow and pressure.
2. the 8421 coding accurate control structure of flow-controllable high-pressure gas pressure according to claim 1, it is characterised in that:
When carrying out flow adjusting, medium gas source is connect with air source inlet (1), test products are connect with high-pressure output port (5), started
Controller (14), and set adjust target mark condition flow, controller (14) according to 4# restricting orifice (6), 3# restricting orifice (8),
The orifice size and air source inlet calculation of pressure of 2# restricting orifice (10) and 1# restricting orifice (12) control coding, send 4# high frequency
Solenoid valve (7), 3# high-frequency electromagnetic valve (9), 2# high-frequency electromagnetic valve (11) and 1# high-frequency electromagnetic valve (13) action command, adjustment process
In, controller (14) adjusts control coding according to the variation of inlet pressure transducer (2) and outlet pressure sensor (4) in real time,
Realize high-pressure gas flow stability contorting.
3. the 8421 coding accurate control structure of flow-controllable high-pressure gas pressure according to claim 1, it is characterised in that:
When carrying out pressure adjusting, medium gas source is connect with air source inlet (1), test products are connect with high-pressure output port (5), started
Controller (14), and adjusting goal pressure is set, when starting pressure regulation, controller (14) is according to adjusting goal pressure, inlet pressure
The detected value of sensor (2) and outlet pressure sensor (4) calculates control coding, and when outlet pressure sensor (4), pressure is zero
When, control is encoded to 0001, and only 1# high-frequency electromagnetic valve (13) acts at this time, and actuation time is high-frequency electromagnetic valve Best-case Response Time
T, in the process, gas flow to low-pressure end by high-voltage end, i.e., by left side through 1# high-frequency electromagnetic valve (13) and 1# restricting orifice
(12) flow direction right side；When controller (14) is acted by the variable quantity and 1# high-frequency electromagnetic valve (13) of outlet pressure sensor (4)
Between T carry out coding calculating, obtain valve group movement coding, and to 4# high-frequency electromagnetic valve (7), 3# high-frequency electromagnetic valve (9), 2# high-frequency electrical
Magnet valve (11) and the instruction of 1# high-frequency electromagnetic valve (13) sending action, until outlet pressure sensor (4) detected value reaches setting and adjusts
Goal pressure is saved, realizes high pressure gas quick response, the control of non-overshoot amount.
4. the 8421 coding accurate control structure of flow-controllable high-pressure gas pressure according to claim 3, it is characterised in that:
Controller (14) the control valve group movement is specific as follows: the first step, 1# high-frequency electromagnetic valve (13) is with high-frequency electromagnetic valve minimum
The movement of response time T is primary, and digital coding is 0001 at this time, and controller (14) is carried out according to high-pressure output port (5) pressure change
Digital coding calculates, and obtains second step valve group movement coding；Second step calculates the valve group obtained according to previous step and acts coding,
Corresponding high-frequency electromagnetic valve events are operated, after a scan period, controller (14) is carried out according to high-pressure output port (5) pressure change
Digital coding calculates, and obtains third step valve group movement coding；N step calculates the valve group obtained according to (N-1) step and acts volume
Code, operates corresponding high-frequency electromagnetic valve events, after a scan period, controller (14) is according to high-pressure output port (5) pressure change
Digital coding calculating is carried out, (N+1) step valve group movement coding is obtained；Above procedure is repeated, until high-pressure output port (5) pressure
Value, which reaches, adjusts goal pressure requirement, and digital coding should be 0000 at this time, and pressure regulation process terminates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710367311.5A CN108958305A (en) | 2017-05-23 | 2017-05-23 | One kind 8421 encodes the accurate control structure of flow-controllable high-pressure gas pressure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710367311.5A CN108958305A (en) | 2017-05-23 | 2017-05-23 | One kind 8421 encodes the accurate control structure of flow-controllable high-pressure gas pressure |
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| CN108958305A true CN108958305A (en) | 2018-12-07 |
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| CN201710367311.5A Pending CN108958305A (en) | 2017-05-23 | 2017-05-23 | One kind 8421 encodes the accurate control structure of flow-controllable high-pressure gas pressure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110470365A (en) * | 2019-08-16 | 2019-11-19 | 北京航天计量测试技术研究所 | The determination method, apparatus and computer storage medium of orifice flow constant characteristic |
| CN112000160A (en) * | 2020-09-07 | 2020-11-27 | 中国航空工业集团公司沈阳空气动力研究所 | Wide-range high-precision gas pressure and flow rapid adjusting device and adjusting method thereof |
| CN114460985A (en) * | 2022-01-04 | 2022-05-10 | 西安航天动力试验技术研究所 | Storage tank pressurization control system and control method based on single chip microcomputer |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2129170B (en) * | 1982-10-21 | 1986-09-24 | Secr Defence | Improvements in or relating to pressure controllers |
| EP0220195A1 (en) * | 1985-04-30 | 1987-05-06 | Teta Tervezö Es Tanacsado Mernöki Kisszövetkezet | Device for regulating the gas consumption |
| GB2329221A (en) * | 1997-09-15 | 1999-03-17 | Caterpillar Inc | Control scheme for pressure relief |
| CN1570403A (en) * | 2003-07-18 | 2005-01-26 | 庄海 | Digitalized linear proportional flow parallel control valve |
| US20070079892A1 (en) * | 2005-10-10 | 2007-04-12 | Cohen Joseph P | Gas filling system |
| CN102385397A (en) * | 2011-09-29 | 2012-03-21 | 北京振兴计量测试研究所 | High-precision pressure control system based on high-speed solenoid valve |
| CN102449569A (en) * | 2009-05-29 | 2012-05-09 | 美卓造纸机械公司 | Method for controlling a digital hydraulic controller |
| CN205942466U (en) * | 2016-08-23 | 2017-02-08 | 中国空气动力研究与发展中心低速空气动力研究所 | Gas pressure control structure |
-
2017
- 2017-05-23 CN CN201710367311.5A patent/CN108958305A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2129170B (en) * | 1982-10-21 | 1986-09-24 | Secr Defence | Improvements in or relating to pressure controllers |
| EP0220195A1 (en) * | 1985-04-30 | 1987-05-06 | Teta Tervezö Es Tanacsado Mernöki Kisszövetkezet | Device for regulating the gas consumption |
| GB2329221A (en) * | 1997-09-15 | 1999-03-17 | Caterpillar Inc | Control scheme for pressure relief |
| CN1570403A (en) * | 2003-07-18 | 2005-01-26 | 庄海 | Digitalized linear proportional flow parallel control valve |
| US20070079892A1 (en) * | 2005-10-10 | 2007-04-12 | Cohen Joseph P | Gas filling system |
| CN102449569A (en) * | 2009-05-29 | 2012-05-09 | 美卓造纸机械公司 | Method for controlling a digital hydraulic controller |
| CN102385397A (en) * | 2011-09-29 | 2012-03-21 | 北京振兴计量测试研究所 | High-precision pressure control system based on high-speed solenoid valve |
| CN205942466U (en) * | 2016-08-23 | 2017-02-08 | 中国空气动力研究与发展中心低速空气动力研究所 | Gas pressure control structure |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110470365A (en) * | 2019-08-16 | 2019-11-19 | 北京航天计量测试技术研究所 | The determination method, apparatus and computer storage medium of orifice flow constant characteristic |
| CN112000160A (en) * | 2020-09-07 | 2020-11-27 | 中国航空工业集团公司沈阳空气动力研究所 | Wide-range high-precision gas pressure and flow rapid adjusting device and adjusting method thereof |
| CN114460985A (en) * | 2022-01-04 | 2022-05-10 | 西安航天动力试验技术研究所 | Storage tank pressurization control system and control method based on single chip microcomputer |
| CN114460985B (en) * | 2022-01-04 | 2024-04-05 | 西安航天动力试验技术研究所 | Storage tank pressurization control system and control method based on single chip microcomputer |
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Application publication date: 20181207 |
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