CN108181955B - Control method for turbocharger test bed combustion chamber with mixing section - Google Patents
Control method for turbocharger test bed combustion chamber with mixing section Download PDFInfo
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- CN108181955B CN108181955B CN201711298381.6A CN201711298381A CN108181955B CN 108181955 B CN108181955 B CN 108181955B CN 201711298381 A CN201711298381 A CN 201711298381A CN 108181955 B CN108181955 B CN 108181955B
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- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
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Abstract
The invention provides a control method of a turbocharger test bed combustion chamber with a mixing section, which comprises the following steps: collecting real-time gas temperature and real-time gas flow passing through an outlet flange of a combustion chamber, and comparing the real-time gas temperature and the real-time gas flow with preset target gas temperature and target gas flow to obtain delta gas temperature deviation and delta gas flow deviation; closed-loop control: abstracting four states according to the states of the delta gas temperature deviation and the delta gas flow deviation, and then selecting a corresponding closed-loop control method according to a state machine to calculate the control current of the gas inlet regulating valve and the gas supplementing port regulating valve; in order to shorten the regulation period, a feedforward control link is introduced. The invention has the following advantages: the opening degree of the valves of the air inlet and the air supplementing port is quickly adjusted through the temperature and the flow of the gas of the rear flange, the flow rate and the combustion temperature of the air at the outlet of the combustion chamber are changed, and the stable rotating speed of the turbocharger in the test process is ensured.
Description
Technical Field
The invention belongs to the technical field of electronic control, and particularly relates to a control method of a turbocharger test bed combustion chamber with a mixing section.
Background
When a gas compressor performance test, a turbine flow characteristic test, turbine efficiency test and the like are carried out on a supercharger component test bed, the rotating speed of a turbocharger needs to be strictly controlled, and if the rotating speed fluctuation of the supercharger is large, the error of a test result is large.
The conventional turbocharger test bed with the single-tube combustion chamber is simple in structure and does not need to be controlled, but the requirement of a high-precision test result is difficult to meet; the turbocharger test bed combustion chamber with the mixing section has good adjusting characteristics, but improper control method can aggravate the rotating speed fluctuation of the turbocharger.
Disclosure of Invention
In view of the above, the present invention is directed to a control method for a turbocharger test stand combustion chamber with a mixing section, which is used for providing stable high-temperature combustion gas at a turbocharger turbine inlet.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a control method for a turbocharger test bed combustion chamber with a mixing section comprises the following steps:
collecting real-time gas temperature and real-time gas flow passing through an outlet flange of a combustion chamber, and comparing the real-time gas temperature and the real-time gas flow with preset target gas temperature and target gas flow to obtain delta gas temperature deviation and delta gas flow deviation;
closed-loop control: abstracting four states according to the states of the delta gas temperature deviation and the delta gas flow deviation, selecting corresponding closed-loop control parameters according to a state machine, and calculating control currents of the gas inlet regulating valve and the gas supplementing port regulating valve;
open-loop control: inquiring preset control MAP according to the acquired real-time gas temperature and real-time gas flow, and acquiring control current of a most matched gas inlet regulating valve and a gas supplementing port regulating valve as feedforward input of steady-state closed-loop control;
and (3) output control: according to the delta gas temperature deviation and the delta gas flow deviation, a correction coefficient k is obtained through query1、k2And finally calculating output control current:
Iinlet valve output＝k1×IIntake valve open loop+IIntake valve closed loop；
IOutput of aeration valve＝k2×IOpen loop of gulp valve+IClosed loop of gulp valve。
Furthermore, threshold limit is set for the control current, the rate of current rise or fall under different working conditions is controlled, and the control parameters can be adjusted on line.
Compared with the prior art, the invention has the following advantages:
(1) the invention is applied to a turbocharger performance test bed and is used for providing stable high-temperature fuel gas at the inlet of a turbocharger turbine;
(2) the invention takes the temperature and the flow of the fuel gas passing through the flange as the target, combines the air flow, and utilizes the control of the air inlet regulating valve and the air supplementing port regulating valve to fully mix the cold air and the high-temperature fuel gas, thereby widening the regulating range of the outlet temperature of the combustion chamber, improving the regulating precision of the temperature and the flow of the fuel gas at the outlet of the combustion chamber and ensuring the stable rotating speed of the turbocharger in the test process.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of a control principle of a turbocharger test stand combustion chamber with a mixing section according to an embodiment of the invention.
Fig. 2 is a schematic diagram of closed-loop control based on a state machine according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of the open-loop control according to the embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
A control method for a turbocharger test bed combustion chamber with a mixing section comprises the following steps:
collecting real-time gas temperature and real-time gas flow passing through an outlet flange of a combustion chamber, and comparing the real-time gas temperature and the real-time gas flow with preset target gas temperature and target gas flow to obtain delta gas temperature deviation and delta gas flow deviation;
closed-loop control: abstracting four states as shown in fig. 2 according to the states of the delta gas temperature deviation and the delta gas flow deviation, selecting corresponding closed-loop control parameters according to a state machine, specifically adopting a classical PID (proportion integration differentiation) method, adopting different PID parameters in the four states, and calculating control currents of the gas inlet regulating valve and the gas supplementing port regulating valve;
open-loop control: in order to shorten the regulation period, a feedforward control link is introduced, a preset control MAP is inquired according to the collected real-time gas temperature and real-time gas flow, and the control current of the most matched air inlet regulating valve and air supplement regulating valve is obtained, as shown in FIG. 3, the control current belongs to the transient control category, and meanwhile, as the feedforward input of the steady-state closed-loop control, the result of the two is the output control current of the system regulating valve after being superposed, and the specific superposition calculation formula is as follows:
and (3) output control: according to the delta gas temperature deviation and the delta gas flow deviation, a correction coefficient k is obtained through query1、k2And finally calculating output control current:
Iinlet valve output＝k1×IIntake valve open loop+IIntake valve closed loop；
IOutput of aeration valve＝k2×IOpen loop of gulp valve+IClosed loop of gulp valve。
The temperature and flow rate of the fuel gas can be adjusted simultaneously or only one of them can be adjusted.
And current threshold limitation is required, the rate of current rising or falling under different working conditions is controlled, so that the system is adaptive to quick response, the oscillation of a pressurization system caused by overshoot is prevented, and meanwhile, the parameters have online adjustment capacity and can meet different types of adjusting valves.
The hardware platform for realizing the method of the embodiment of the invention adopts a Motorola 32-bit singlechip, can realize the rapid sampling of the gas temperature and the gas flow, calculates the driving current of the regulating valve, has adjustable waveform of the driving current, and has the main functions of transient open-loop control, state machine conversion, air inlet valve opening closed-loop control and air supply port valve opening closed-loop control.
According to the method, the control currents of the air inlet regulating valve and the air supplementing port regulating valve are regulated according to the target gas temperature and the target gas flow in combination with the actually collected real-time gas temperature and gas flow, so that the gas temperature and the gas flow are kept consistent with the target values, a proper oil-gas ratio is kept, the regulating time is shortened, and the stability of the regulating result is ensured.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (2)
1. A control method of a turbocharger test bed combustion chamber with a mixing section is characterized by comprising the following steps:
collecting real-time gas temperature and real-time gas flow passing through an outlet flange of a combustion chamber, and comparing the real-time gas temperature and the real-time gas flow with preset target gas temperature and target gas flow to obtain delta gas temperature deviation and delta gas flow deviation;
closed-loop control: abstracting four states according to the states of the delta gas temperature deviation and the delta gas flow deviation, wherein the four states comprise increasing, decreasing, increasing and decreasing, then selecting corresponding closed-loop control parameters according to a state machine, and calculating control currents of an air inlet regulating valve and an air supplement regulating valve for regulating the gas flow;
open-loop control: inquiring preset control MAP according to the acquired real-time gas temperature and real-time gas flow, and acquiring control current of a most matched gas inlet regulating valve and a gas supplementing port regulating valve as feedforward input of steady-state closed-loop control;
and (3) output control: according to the delta gas temperature deviation and the delta gas flow deviation, a correction coefficient k is obtained through query1、k2And finally calculating output control current:
Iinlet valve output＝k1×IIntake valve open loop+IIntake valve closed loop；
IOutput of aeration valve＝k2×IOpen loop of gulp valve+IClosed loop of gulp valve。
2. The method for controlling the turbocharger test stand combustion chamber with the mixing section as recited in claim 1, wherein: threshold limit is set for the control current, the rising or falling rate of the current under different working conditions is controlled, and control parameters can be adjusted on line, wherein the control parameters refer to the threshold of the control current and the rising or falling rate of the current.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711298381.6A CN108181955B (en) | 2017-12-08 | 2017-12-08 | Control method for turbocharger test bed combustion chamber with mixing section |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711298381.6A CN108181955B (en) | 2017-12-08 | 2017-12-08 | Control method for turbocharger test bed combustion chamber with mixing section |
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| CN108181955A CN108181955A (en) | 2018-06-19 |
| CN108181955B true CN108181955B (en) | 2020-06-19 |
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| CN114136649B (en) * | 2021-10-20 | 2023-08-18 | 中国航发四川燃气涡轮研究院 | Flow distribution structure and method in turbine engine combustion chamber component simulation test |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793619A (en) * | 2010-03-12 | 2010-08-04 | 北京理工大学 | Test bench with double combustion chambers, double superchargers and low cycle fatigue based on self-circulation mode |
| CN102788699A (en) * | 2012-07-23 | 2012-11-21 | 中国兵器工业集团第七0研究所 | Flame tube structure of thrust combustion chamber used for supercharger test |
| CN102182575B (en) * | 2011-01-27 | 2013-02-13 | 潍柴动力股份有限公司 | Equipment and method for controlling air system of diesel engine |
| CN106257138A (en) * | 2015-06-18 | 2016-12-28 | 勤益科技大学 | Combustion device with controllable output heat source temperature |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7757549B2 (en) * | 2008-02-21 | 2010-07-20 | Cummins Ip, Inc | Apparatus, system, and method for predictive control of a turbocharger |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793619A (en) * | 2010-03-12 | 2010-08-04 | 北京理工大学 | Test bench with double combustion chambers, double superchargers and low cycle fatigue based on self-circulation mode |
| CN102182575B (en) * | 2011-01-27 | 2013-02-13 | 潍柴动力股份有限公司 | Equipment and method for controlling air system of diesel engine |
| CN102788699A (en) * | 2012-07-23 | 2012-11-21 | 中国兵器工业集团第七0研究所 | Flame tube structure of thrust combustion chamber used for supercharger test |
| CN106257138A (en) * | 2015-06-18 | 2016-12-28 | 勤益科技大学 | Combustion device with controllable output heat source temperature |
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