CN104358625B - The method of a kind of Variable Thrust Engine thrust closed-loop control - Google Patents
The method of a kind of Variable Thrust Engine thrust closed-loop control Download PDFInfo
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- CN104358625B CN104358625B CN201410348396.9A CN201410348396A CN104358625B CN 104358625 B CN104358625 B CN 104358625B CN 201410348396 A CN201410348396 A CN 201410348396A CN 104358625 B CN104358625 B CN 104358625B
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Abstract
A method for Variable Thrust Engine thrust closed-loop control, its feature is: flow regulator aperture corresponding different engine thrust is made to contrast list with thrust variation amount in order; Control system gathers present engine running parameter, be converted into and work as forward thrust, and and instruction thrust compares; If in the time that the difference of forward thrust and instruction thrust exceeds setting franchise, control system regulates tables of data to regulate motor power according to thrust, be less than setting franchise if work as the difference of forward thrust and instruction thrust, think that working as forward thrust and instruction thrust equates, does not carry out thrust adjusting. The present invention has improved the regulating working conditions precision of pump pressure type Variable Thrust Engine effectively, and the engine operating condition accuracy error of empirical tests is less than 1%.
Description
Technical field
The invention belongs to Aeronautics and Astronautics technical field of engines, relate to a kind of control of Variable Thrust Engine thrustMethod processed, is specifically related to the method for a kind of Variable Thrust Engine thrust closed-loop control.
Background technology
Variable Thrust Engine is that a kind of thrust can be carried out the liquid-propellant rocket engine regulating continuously, leads in space flightTerritory is with a wide range of applications. But for Variable Thrust Engine on a large scale, due to working conditions change scopeWider, there is certain difference in the unavoidable and design point of performance under different operating modes, in whole condition rangePrecision is difficult to ensure card, and the existing operating mode of Variable Thrust Engine on a large scale precision generally can only be controlled at 80%～90%In scope, meanwhile, because Variable Thrust Engine is in practical work process on a large scale, thrust variation scopeGreatly, the aperture size that thrust regulation and control system cannot be controlled flow regulator is timely entered motor powerRow is controlled in real time, and therefore, based on synthtic price index, existing motor power control method is difficult to meet currentThe instructions for use of Variable Thrust Engine on a large scale.
Summary of the invention
In order to solve the problem in background technology, the invention provides a kind of control accuracy high, can realize rightMotor power carries out the method for the Variable Thrust Engine thrust closed-loop control regulating in real time.
Concrete technical scheme of the present invention is:
A method for Variable Thrust Engine thrust closed-loop control, is characterized in that, comprises the following steps:
1) the contrast list of the corresponding flow regulator opening value of formulation engine thrust value:
1.1) set initial start-up machine thrust and motor power variable quantity; In initial start-up machine thrustBasis on taking described motor power variable quantity as unit increases progressively successively or successively decreases, draw several thrustValue, forms thrust instruction set;
1.2), according to thrust instruction set, by liquid flow test, obtain the flow that each thrust magnitude is corresponding and adjustJoint device opening value; Draw the engine thrust value contrast list of corresponding flow regulator opening value one by one;
2) set tolerance according to control accuracy and minimum engine thrust magnitude;
3) control of target engine:
3.1) send instruction thrust, engine operation to engine; The value of described instruction thrust is selected from stepRapid 1.1) described thrust instruction set;
3.2) gather present engine running parameter, be converted into present engine thrust;
3.3) adjusting of motor power:
If the difference of present engine thrust and instruction thrust is within tolerance; Think present engineThrust and instruction thrust is equal, and flow regulator does not regulate;
If the difference of present engine thrust and instruction thrust exceeds tolerance; According to above-mentioned contrast listAccording to the opening value of the mode adjust flux adjuster increasing progressively or successively decrease, and then execution step 3.2),Until the difference of present engine thrust and instruction thrust is within tolerance;
4) control and finish.
Above-mentioned steps 3.2) middle engine operating parameter employing motor power chamber pressure or the front pressure of spray or whirlpoolWheel speed.
Above-mentioned engine operating parameter is to adopt the sensor of multiple redundancies each other to gather.
The present invention's beneficial effect is compared with prior art:
(1) the method cost that the present invention adopts is low, and the cycle is short, realization is comparatively easy. By formulating engineContrast list, the collection engine real-time working parameter etc. of the corresponding flow regulator opening value of thrust magnitude are simpleOperation just can realize, and does not need the spare part of production, processed complex;
(2) the present invention adopts the method for closed-loop control, is carrying out thrust control for Variable Thrust Engine on a large scaleTime processed, departure can be controlled in 1% scope, and control accuracy is higher, accuracy rate is higher.
(3) the present invention is not only applicable to the thrust precision control of pump pressure type Variable Thrust Engine, and also can promote shouldFor the thrust precision control of squash type Variable Thrust Engine and various types of fixing trust engines.
Brief description of the drawings
Fig. 1 is workflow block diagram of the present invention.
Detailed description of the invention
The method of Variable Thrust Engine thrust provided by the invention closed-loop control, comprises the following steps:
A method for Variable Thrust Engine thrust closed-loop control, is characterized in that, comprises the following steps:
1) the contrast list of the corresponding flow regulator opening value of formulation engine thrust value:
1.1) set initial start-up machine thrust and motor power variable quantity; In initial start-up machine thrustBasis on taking described motor power variable quantity as unit increases progressively successively or successively decreases, draw several thrustValue, forms thrust instruction set;
1.2), according to thrust instruction set, by liquid flow test, obtain the flow that each thrust magnitude is corresponding and adjustJoint device opening value; Draw the engine thrust value contrast list of corresponding flow regulator opening value one by one;
Step 2) set tolerance according to control accuracy and minimum engine thrust magnitude;
Specifically: if desired control accuracy is e, and Fmin is minimum engine thrust magnitude, and tolerance exists±(1-e)Fmin；
Step 3) control of target engine:
3.1) send instruction thrust, engine operation to engine; The value of described instruction thrust is selected from stepRapid 1.1) described thrust instruction set;
3.2) gather present engine running parameter, be converted into present engine thrust;
(F is for to work as forward thrust, and a is constant, X according to linear relation: F=aX+b for described conversion methodFor running parameter, b is constant, and wherein, a and b are empirical value, for obtaining by test of many times.
3.3) adjusting of motor power:
If the difference of present engine thrust and instruction thrust is within tolerance; Think present engineThrust and instruction thrust is equal, and flow regulator does not regulate;
If the difference of present engine thrust and instruction thrust exceeds tolerance; According to above-mentioned contrast listAccording to the opening value of the mode adjust flux adjuster increasing progressively or successively decrease, and then execution step 3.2),Until the difference of present engine thrust and instruction thrust is within tolerance;
Step 4) control and finish.
Further, above-mentioned steps 3.2) in engine operating parameter be specially motor power chamber pressureOr the front pressure of engine spray or secondary speed.
Special feature is also: in this method, in order to obtain accurately engine operating parameter, inventor adoptsEngine operating parameter is gathered with the sensor of multiple redundancies each other.
Because engine operating parameter comprises motor power chamber pressure, the front pressure of spray, secondary speed etc.; Send outThe method that a person of good sense proposes according to the present invention according to different running parameters is made following different test, toolBody performance is as follows:
Embodiment 1 (gathering motor power chamber pressure is engine operating parameter)
(1) setting initial start-up machine thrust is that 6kN and motor power variable quantity are 100N, obtains multipleEngine thrust value, and obtain multiple flow regulator opening values by engine thrust value, then respectively willMultiple engine thrust value and multiple flow regulator opening value thereof are corresponding one by one, by sequentially enumerating from large to small,Final formation contrasts list;
The contrast list of engine thrust value and flow regulator opening value
Note: in table, flow regulator adjuster opening value is to be determined by two parameters, respectively: oxidant is adjustedJoint device opening value and fuel trimmer opening value; Be exactly the respectively corresponding oxygen of each engine thrust valueAgent adjuster opening value and fuel trimmer opening value could meet use.
(2) control accuracy is 99%, and minimum engine thrust magnitude is 6kN; Tolerance ± 30N;
(3) thrust regulation and control system is chosen engine thrust value in above-mentioned contrast list as instruction thrustStart to engine; Pressure sensor gathers present engine thrust chamber pressure parameter, and (the present invention adopts multipleThe pressure sensor of redundancy carries out parameter acquisition each other, then averages) and be converted into current startingMachine thrust;
Concrete conversion process:
(F is present engine thrust to F=aX+b, and unit is kN, and a is constant, and X is motor power chamberPressure, unit is MPa, and b is constant, and wherein a=2.486 and b=0.143 are empirical value.
Then, utilize present engine thrust and instruction thrust to compare;
If in the time that the difference of forward thrust and instruction thrust is less than or equal to franchise, think when forward thrust and instruction thrustEquate, do not regulate.
If in the time that the difference of forward thrust and instruction thrust is greater than franchise, flow regulator is according to above-mentioned contrast listMiddle flow regulator opening value is according to successively motor power being regulated from the order under upper; Until work asThe difference of front engine thrust and instruction thrust within tolerance, think present engine thrust and instructionThrust is equal, and flow regulator stops regulating.
Embodiment 2 (gathering the front pressure of engine spray is engine operating parameter)
(1) setting initial start-up machine thrust is that 20kN and motor power variable quantity are 200N, obtains multipleEngine thrust value, and obtain multiple flow regulator opening values by engine thrust value, then respectively willMultiple engine thrust value and multiple flow regulator opening value thereof are corresponding one by one, by sequentially enumerating from large to small,Final formation contrasts list;
The contrast list of engine thrust value and flow regulator opening value
Note: in table, flow regulator adjuster opening value is to be determined by two parameters, respectively: oxidant is adjustedJoint device opening value and fuel trimmer opening value; Be exactly the respectively corresponding oxygen of each engine thrust valueAgent adjuster opening value and fuel trimmer opening value could meet use.
(2) control accuracy is 99%, and minimum engine thrust magnitude is 20kN; Tolerance ± 100N;
(3) thrust regulation and control system is chosen engine thrust value in above-mentioned contrast list as instruction thrustStart to engine; Before pressure sensor gathers present engine spray, (the present invention adopts multiple superfluous each other pressureRemaining pressure sensor carries out parameter acquisition, then averages) and be converted into present engine thrust;
Concrete conversion process:
F=aX+b (F is present engine thrust, and unit is kN, a=8.17, and X is pressure before engine spray,Unit is MPa, b=-45.4, and wherein a and b are empirical value.
Then, utilize present engine thrust and instruction thrust to compare;
If in the time that the difference of forward thrust and instruction thrust is less than or equal to franchise, think when forward thrust and instruction thrustEquate, do not regulate.
If in the time that the difference of forward thrust and instruction thrust is greater than franchise, flow regulator is according to above-mentioned contrast listMiddle flow regulator opening value is according to successively motor power being regulated from the order under upper; Until work asThe difference of front engine thrust and instruction thrust within tolerance, think present engine thrust and instructionThrust is equal, and flow regulator stops regulating.
Embodiment 3 (collection secondary speed is engine operating parameter)
(1) setting initial start-up machine thrust is that 5kN and motor power variable quantity are 50N, obtains multipleMotivation thrust magnitude, and obtain multiple flow regulator opening values by engine thrust value, then will be many respectivelyIndividual engine thrust value and multiple flow regulator opening value thereof are corresponding one by one, by sequentially enumerating from large to small,Final formation contrasts list;
The contrast list of engine thrust value and flow regulator opening value
Note: in table, flow regulator adjuster opening value is to be determined by two parameters, respectively: oxidant is adjustedJoint device opening value and fuel trimmer opening value; Be exactly the respectively corresponding oxygen of each engine thrust valueAgent adjuster opening value and fuel trimmer opening value could meet use.
(2) control accuracy is 99%, and minimum engine thrust magnitude is 5kN; Tolerance ± 25N;
(3) thrust regulation and control system is chosen engine thrust value in above-mentioned contrast list as instruction thrustStart to engine; Pressure sensor gathers present engine secondary speed, and (the present invention adopts multiple superfluous each otherRemaining speed probe carries out parameter acquisition, then averages) and be converted into present engine thrust;
Concrete conversion process:
(F is present engine thrust to F=aX+b, and unit is kN, a=1.93 × 10-4, X is engine whirlpoolWheel speed, unit is r/min, b=-2.86, wherein a and b are empirical value.
Then, utilize present engine thrust and instruction thrust to compare;
If in the time that the difference of forward thrust and instruction thrust is less than or equal to franchise, think when forward thrust and instruction thrustEquate, do not regulate.
If in the time that the difference of forward thrust and instruction thrust is greater than franchise, flow regulator is according to above-mentioned contrast listMiddle flow regulator opening value is according to successively motor power being regulated from the order under upper; Until work asThe difference of front engine thrust and instruction thrust within tolerance, think present engine thrust and instructionThrust is equal, and flow regulator stops regulating.
Through the repeatedly test run checking of above-mentioned 3 embodiment, method of the present invention control method is before startedMachine in the course of the work control accuracy improves greatly, and working stability, operational excellence.
Claims (3)
1. a method for Variable Thrust Engine thrust closed-loop control, is characterized in that, comprises the following steps:
1) the contrast list of the corresponding flow regulator opening value of formulation engine thrust value:
1.1) set initial start-up machine thrust and motor power variable quantity; At the base of initial start-up machine thrustOn plinth, taking described motor power variable quantity as unit increases progressively successively or successively decreases, draw several thrust magnitudes,Form thrust instruction set;
1.2), according to thrust instruction set, by liquid flow test, obtain the flow regulator that each thrust magnitude is correspondingOpening value; Draw the engine thrust value contrast list of corresponding flow regulator opening value one by one;
2) set tolerance according to control accuracy and minimum engine thrust magnitude;
3) control of target engine:
3.1) send instruction thrust, engine operation to engine; The value of described instruction thrust is selected from stepRapid 1.1) described thrust instruction set;
3.2) gather present engine running parameter, be converted into present engine thrust;
3.3) adjusting of motor power:
If the difference of present engine thrust and instruction thrust is within tolerance; Think present engineThrust and instruction thrust is equal, and flow regulator does not regulate;
If the difference of present engine thrust and instruction thrust exceeds tolerance; According to above-mentioned contrast listAccording to the opening value of the mode adjust flux adjuster increasing progressively or successively decrease, and then execution step 3.2),Until the difference of present engine thrust and instruction thrust is within tolerance;
4) control and finish.
2. the method for Variable Thrust Engine thrust according to claim 1 closed-loop control, is characterized in that:Described step 3.2) in engine operating parameter adopt motor power chamber pressure or spray before pressure or turbine turnSpeed.
3. the method for Variable Thrust Engine thrust according to claim 2 closed-loop control, is characterized in that:Described engine operating parameter is to adopt the sensor of multiple redundancies each other to gather.
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| CN201410348396.9A CN104358625B (en) | 2014-07-11 | 2014-07-21 | The method of a kind of Variable Thrust Engine thrust closed-loop control |
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| CN107607325B (en) * | 2017-09-04 | 2019-04-23 | 西安航天动力研究所 | Needle fastens formula ejector filler Variable Thrust Engine System Operating condition adjustment method |
| CN110968103B (en) * | 2019-12-12 | 2023-08-22 | 广州中科宇航探索技术有限公司 | Boosting thrust-variable gesture-adjusting method and device |
| CN111043042A (en) * | 2019-12-17 | 2020-04-21 | 北京深蓝航天科技有限公司 | Electric pump device of liquid rocket |
| CN111498149B (en) * | 2020-04-28 | 2021-07-13 | 北京控制工程研究所 | Soft landing attitude and orbit integrated control method based on parallel variable thrust engine |
| CN112304169B (en) * | 2020-10-28 | 2023-05-02 | 北京星际荣耀空间科技股份有限公司 | Carrier rocket guidance method and system based on thrust adjustment |
| CN112112745B (en) * | 2020-11-23 | 2021-06-01 | 蓝箭航天空间科技股份有限公司 | Self-adaptive zero-returning control method and device for engine after shutdown of spacecraft |
| CN113157010B (en) * | 2021-04-25 | 2023-11-21 | 北京航空航天大学 | Method and device for regulating and controlling thrust of deep variable thrust engine and electronic equipment |
| CN114370355B (en) * | 2022-01-07 | 2023-01-17 | 中国人民解放军63921部队 | Differential variable thrust method and device, electronic equipment and storage medium |
| CN114607527B (en) * | 2022-03-23 | 2023-09-05 | 北京航天雷特机电工程有限公司 | Temperature control conveying system for propellant of space engine |
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| US4599044A (en) * | 1985-01-07 | 1986-07-08 | The United States Of America As Represented By The Secretary Of The Navy | Electronic feedback area control system for TVC gas generator |
| US5406787A (en) * | 1993-08-20 | 1995-04-18 | Lockheed Corporation Lockeed Fort Worth Company | After-burning turbo-jet engine with a fixed geometry exhaust nozzle |
| US5806301A (en) * | 1995-12-11 | 1998-09-15 | United Technologies Corporation | Ramjet/scramjet inlet isolator unstart prevention |
| US6412275B1 (en) * | 2000-09-08 | 2002-07-02 | United Technologies Corporation | Solid propellant gas generator impulse management scheme for high mass flow turn-down ratio |
| US7631487B2 (en) * | 2006-10-27 | 2009-12-15 | Cfd Research Corporation | Constant volume rocket motor |
| US9097210B2 (en) * | 2012-07-03 | 2015-08-04 | Hamilton Sundstrand Corporation | Turbine generator assembly for thrust vector control |
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