CN101737182A - Control system of intake valve assembly in auxiliary power unit - Google Patents
Control system of intake valve assembly in auxiliary power unit Download PDFInfo
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- CN101737182A CN101737182A CN200910254456A CN200910254456A CN101737182A CN 101737182 A CN101737182 A CN 101737182A CN 200910254456 A CN200910254456 A CN 200910254456A CN 200910254456 A CN200910254456 A CN 200910254456A CN 101737182 A CN101737182 A CN 101737182A
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- door
- intake valve
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The invention discloses a control system of an intake valve assembly in an auxiliary power unit, which realizes efficient system debug troubleshooting by an intake valve excitation control circuit which comprises a valve opening control signal drive circuit, a valve closing control signal drive circuit, a drive circuit and an overcurrent monitoring circuit; when valve opening and valve closing commands occur at the same time, the valve opening control signal drive circuit and the valve closing control signal drive circuit ensure that the valve opening command to have priority through a nand-gate logic. The control system of the invention optimizes related circuits of the control system of the intake valve assembly in the auxiliary power unit, has reasonable control and high reliability, and can improve maintenance and troubleshooting efficiency.
Description
Technical field
The present invention relates to a kind of control system of intake valve assembly, be specifically related to the control system of intake valve assembly in a kind of auxiliary power unit.
Background technique
Growing along with current auxiliary power unit, improving constantly of user's request, the design of various kinds of sensors, actuation mechanism is more and more complete in system, under the increasingly sophisticated prerequisite of system architecture, the user is more and more higher especially to the requirement of security of system, reliability, maintainability, therefore be in design or all will pay attention to the application of fault diagnosis technology in safeguarding, could improve reliability of products and maintainability like this.
By analysis to this auxiliary power unit intake valve assembly, system is delimitd a boundary line, it is the intake valve fault, analyze top event reason that take place, direct, necessary and sufficient then and draw 8 secondary top events, and then by constantly to the analysis of system, successively downward, arrive the decomposition limit of fault tree always, fault tree is decomposed into several bottom events.As shown in Figure 1, the implication of each incident of fault tree is referring to table 1, and fault tree thus by qualitative analysis, fault tree quantitative analysis, importance degree analysis, can get:
Each probability of malfunction importance degree is in proper order:
X
11＞X
13＞X
7＞X
10＞X
9＞X
8＝X
6＞X
5＞X
12＞X
2＝X
4＞X
1＝X
3
The general fault coefficient of each fault is in proper order:
X
11＞X
7＞X
12＞X
10＞X
9＞X
8＝X
6＞X
5＞X
13＞X
2＝X
4＞X
1＝X
3
Wherein probability importance degree order can be for reliability design provides foundation, and fault coefficient order can improve the efficient of system debug troubleshooting.
Table 1 fault tree door incident implication
| Door or incident | Definition |
| ??T | The intake valve fault |
| ??M 1 | The complete opening signal fault of intake valve |
| ??M 2 | The complete shutdown signal fault of intake valve |
| ??M 3 | Intake valve is opened overlong time |
| ??M 4 | The IC Intake Valve Closes overlong time |
| ??M 5 | Intake valve is opened drive circuit overcurrent (can recover) |
| ??M 6 | IC Intake Valve Closes drive circuit overcurrent (can recover) |
| Door or incident | Definition |
| ??M 7 | Intake valve is opened drive circuit overcurrent (irrecoverable) |
| ??M 8 | IC Intake Valve Closes drive circuit overcurrent (irrecoverable) |
| ??M 9 | It is too small that intake valve is opened driving current |
| ??M 10 | The hydraulic actuator fault |
| ??M 11 | The IC Intake Valve Closes driving current is too small |
| ??M 12 | Hydraulic system fault |
| ??X 1 | Intake valve is opened sensor fault fully |
| ??X 2 | Intake valve is opened discrete magnitude conditioning circuit fault fully |
| ??X 3 | The complete closure sensor fault of intake valve |
| ??X 4 | Intake valve is closed discrete magnitude conditioning circuit fault fully |
| ??X 5 | The intake valve actuator is stuck |
| ??X 6 | Intake valve is opened the drive circuit fault |
| ??X 7 | The sample circuit fault |
| ??X 8 | IC Intake Valve Closes drive circuit fault |
| ??X 9 | Load short circuits |
| ??X 10 | Logic breaking circuit fault |
| ??X 11 | Load cut-off |
| ??X 12 | Hydraulic system is under-voltage |
| ??X 13 | The PTU fault |
Summary of the invention
The object of the present invention is to provide the control system of intake valve assembly in a kind of auxiliary power unit, its solved in the background technique in the auxiliary power unit intake valve assembly reliability low, can safeguard the inefficient technical problem of low and fault diagnosis.
Technical solution of the present invention is:
The control system of intake valve assembly in a kind of auxiliary power unit, an intake valve excitation of its dependence control circuit is realized the efficient system debug troubleshooting, and its special way is: described intake valve excitation control circuit comprises open the door control signal and pass gate control signal drive circuit and driving current and overcurrent supervisory circuit;
The described control signal and close the gate control signal drive circuit of opening the door, when open the door order and the order of closing the door took place simultaneously, the assurance order of opening the door had preference through AND NOT gate logic for the two.
The above-mentioned control signal of opening the door comprises with pass gate control signal drive circuit
When the command signal of opening the door is high level HI, make switch triode V1 biasing conducting, produce one+13V voltage by resistance R 34 and drive the FET power tube; This voltage is combined into the line delay deglitch by resistance R 36 and capacitor C 11; Light idol V61 is controlled at the FET power tube is disconnected;
When the command signal of opening the door was low level LO, the order of closing the door could be passed through the AND NOT gate logic, made switch triode V2 conducting; Produce one+13V voltage through resistance R 38; This voltage drives the FET power tube through resistance R 40 and capacitor C 12 combinatorial delays deglitch; Light idol V62 is controlled at the FET power tube is disconnected.
Above-mentioned driving current and overcurrent supervisory circuit comprise
The precision resistance of one 0.1 Ω is set, to guarantee acquisition precision between+28V power supply and exciting circuit; Pressure drop is connected to amplifier N10C on it, and by divider resistance R124, resistance R 125 is imported at in-phase end, resistance R 126, and resistance R 127 is imported at backward end; The exciting current that described exciting circuit the produces signal that unrolls is passed to A/D converter as ratio-voltage.
The above-mentioned exciting current signal that unrolls also is connected with comparator; Described comparator comprises the first comparator N4A and the second comparator N4B, and when electric current when being high greater than the 0.5V first comparator N4A out gate current monitoring discrete magnitude, expression has driving current work; When electric current greater than 10A second comparator N4B out gate when to cross the flow monitoring discrete magnitude be high then, expression overcurrent.
Above-mentioned when overcurrent, this is crossed the flow monitoring discrete magnitude and drives light idol V61, light idol V62 by d type flip flop D2A and make the opening-closing door excitation pulse become 28V from 13V to make that high power valve disconnects on the motherboard, thereby shutoff door drives output.
Above-mentioned when the door driven, then the gate drive voltage that opens the door/close by high power valve output on the motherboard also feeds back to this function module, provide gate drive voltage monitoring discrete magnitude by dividing potential drop and mu balanced circuit, its type is a Transistor-Transistor Logic level, if then represent to have gate drive voltage output during high level.
Above-mentioned amplifier N10C output voltage is the corresponding 0.1V voltage of every 1A exciting current.
The invention has the advantages that: optimized the control system interlock circuit of intake valve assembly in the auxiliary power unit, control is reasonable, the reliability height; Consider the needs of maintenance, the fault point is set, come fault location by fault recording according to the fault tree analysis conclusion; Can use the ground maintenance machine to check the fault of record; When safeguarding, can obtain the fault coefficient in conjunction with fault diagnosis according to the fault that system quotes and formulate the troubleshooting flow process, can improve maintenance and troubleshooting efficient.
Description of drawings
Fig. 1 is an intake valve assembly fault tree illustraton of model;
Fig. 2 is intake valve excitation control circuit block diagram;
Fig. 3 is control signal and the pass gate control signal regulating circuit of opening the door;
Fig. 4 is driving current and overcurrent supervisory circuit.
Embodiment
The control system of intake valve assembly in a kind of auxiliary power unit, an intake valve excitation of its dependence control circuit is realized the efficient system debug troubleshooting, and intake valve excitation control circuit comprises open the door control signal and pass gate control signal drive circuit and driving current and overcurrent supervisory circuit;
The control signal of opening the door and close the gate control signal drive circuit, when open the door order and the order of closing the door took place simultaneously, the assurance order of opening the door had preference through AND NOT gate logic for the two.
The control signal of opening the door and pass gate control signal drive circuit comprise
When the command signal of opening the door is high level HI, make switch triode V1 biasing conducting, produce one+13V voltage by resistance R 34 and drive the FET power tube; This voltage is combined into the line delay deglitch by resistance R 36 and capacitor C 11; Light idol V61 is controlled at the FET power tube is disconnected;
When the command signal of opening the door was low level LO, the order of closing the door could be passed through the AND NOT gate logic, made switch triode V2 conducting; Produce one+13V voltage through resistance R 38; This voltage drives the FET power tube through resistance R 40 and capacitor C 12 combinatorial delays deglitch; Light idol V62 is controlled at the FET power tube is disconnected.
Driving current and overcurrent supervisory circuit comprise
The precision resistance of one 0.1 Ω is set, to guarantee acquisition precision between+28V power supply and exciting circuit; Pressure drop is connected to amplifier N10C on it, and by divider resistance R124, resistance R 125 is imported at in-phase end, resistance R 126, and resistance R 127 is imported at backward end; The exciting current that described exciting circuit the produces signal that unrolls is passed to A/D converter as ratio-voltage.
The exciting current signal that unrolls also is connected with comparator; Described comparator comprises the first comparator N4A and the second comparator N4B, and when electric current when being high greater than the 0.5V first comparator N4A out gate current monitoring discrete magnitude, expression has driving current work; When electric current greater than 10A second comparator N4B out gate when to cross the flow monitoring discrete magnitude be high then, expression overcurrent.
When overcurrent, this is crossed the flow monitoring discrete magnitude and drives light idol V61, light idol V62 by d type flip flop D2A and make the opening-closing door excitation pulse become 28V from 13V to make that high power valve disconnects on the motherboard, thereby shutoff door drives output.
When the door driven, then the gate drive voltage that opens the door/close by high power valve output on the motherboard also feeds back to this function module, provide gate drive voltage monitoring discrete magnitude by dividing potential drop and mu balanced circuit, its type is a Transistor-Transistor Logic level, if then represent to have gate drive voltage output during high level.
Amplifier N10C output voltage is the corresponding 0.1V voltage of every 1A exciting current.
Open the door order DOPENCODS and the order DCLOSCODS that closes the door of the present invention takes place simultaneously, and the order that guarantees to open the door has preference through AND NOT gate logic for the two.
Table 2 intake valve coherent signal table
The physical circuit design:
Make V1 biasing conducting during the command signal of opening the door DOPENCODS (P2B16) HI, produce one+13V by R34 like this and drive the FET power tube.This voltage is combined into the line delay deglitch by R36 and C11.Light idol V61 is controlled at power tube is disconnected.
Command signal DOPENCODS is LO if open the door, and the order DCLOSCODS that closes the door could pass through the AND NOT gate logic, makes the V2 conducting.Produce one+13V voltage through R38 like this.This voltage drives the FET power tube through R40/C12 combinatorial delays deglitch.Light idol V62 is controlled at power tube is disconnected.
2.2 driving current and overcurrent supervisory circuit
The precision resistance of one 0.1 Ω is connected+28V power supply and exciting circuit between.Pressure drop is connected to amplifier N10C on it, and by divider resistance R124, R125 imports at in-phase end, R126, and R127 imports at backward end, and this amplifier output voltage is the corresponding 0.1V voltage of every 1A exciting current.The exciting current signal DOORCWADC (P2A9) that unrolls passes to A/D converter as ratio-voltage like this.This signal is also connected to comparator.If electric current is high (HI) greater than 0.5V comparator N4A output DOORCD, expression has driving current work.If electric current greater than 10A then N4B output DOOROC be high, is represented overcurrent.At this moment this signal makes opening-closing door excitation pulse DOPNCOG5/DCLOSCOG4 become 28V from 13V by d type flip flop D2A driving light idol V61, V62 and makes high power valve disconnection on the motherboard, thereby shutoff door drives output.When the door driven, then open the door/close gate drive voltage DOPNCODSP and the DCLOSCODSP by high power valve output on the motherboard also feeds back to the ACM module, provide gate drive voltage monitoring DOORVD by dividing potential drop and mu balanced circuit, be Transistor-Transistor Logic level, height then represents to have gate drive voltage output.
1. software design
The needs of maintenance are mainly considered in the software design, according to the fault tree analysis conclusion fault point are set, and come fault location by fault recording.Fault recording is referring to table 3,
Table 3 fault recording table
Can use the ground maintenance machine to check the fault of record.
When safeguarding, can obtain the fault coefficient in conjunction with fault diagnosis according to the fault that system quotes and formulate the troubleshooting flow process, can improve maintenance and troubleshooting efficient.
Claims (7)
1. the control system of intake valve assembly in the auxiliary power unit, an intake valve excitation of its dependence control circuit is realized the efficient system debug troubleshooting, it is characterized in that: described intake valve excitation control circuit comprises open the door control signal and pass gate control signal drive circuit and driving current and overcurrent supervisory circuit;
The described control signal and close the gate control signal drive circuit of opening the door, when open the door order and the order of closing the door took place simultaneously, the assurance order of opening the door had preference through AND NOT gate logic for the two.
2. according to the control system of intake valve assembly in the described auxiliary power unit of claim 1, it is characterized in that: the described control signal of opening the door comprises with pass gate control signal drive circuit
When the command signal of opening the door is high level HI, make switch triode V1 biasing conducting, produce one+13V voltage by resistance R 34 and drive the FET power tube; This voltage is combined into the line delay deglitch by resistance R 36 and capacitor C 11; Light idol V61 is controlled at the FET power tube is disconnected;
When the command signal of opening the door was low level LO, the order of closing the door could be passed through the AND NOT gate logic, made switch triode V2 conducting; Produce one+13V voltage through resistance R 38; This voltage drives the FET power tube through resistance R 40 and capacitor C 12 combinatorial delays deglitch; Light idol V62 is controlled at the FET power tube is disconnected.
3. according to the control system of intake valve assembly in the described auxiliary power unit of claim 1, it is characterized in that: described driving current and overcurrent supervisory circuit comprise
The precision resistance of one 0.1 Ω is set, to guarantee acquisition precision between+28V power supply and exciting circuit; Pressure drop is connected to amplifier N10C on it, and by divider resistance R124, resistance R 125 is imported at in-phase end, resistance R 126, and resistance R 127 is imported at backward end; The exciting current that described exciting circuit the produces signal that unrolls is passed to A/D converter as ratio-voltage.
4. according to the control system of intake valve assembly in the described auxiliary power unit of claim 3, it is characterized in that: the described exciting current signal that unrolls also is connected with comparator; Described comparator comprises the first comparator N4A and the second comparator N4B, and when electric current when being high greater than the 0.5V first comparator N4A out gate current monitoring discrete magnitude, expression has driving current work; When electric current greater than 10A second comparator N4B out gate when to cross the flow monitoring discrete magnitude be high then, expression overcurrent.
5. according to the control system of intake valve assembly in the described auxiliary power unit of claim 4, it is characterized in that: described when overcurrent, this is crossed the flow monitoring discrete magnitude and drives light idol V61, light idol V62 by d type flip flop D2A and make the opening-closing door excitation pulse become 28V from 13V to make that high power valve disconnects on the motherboard, thereby shutoff door drives output.
6. according to the control system of intake valve assembly in the described auxiliary power unit of claim 4, it is characterized in that: described when the door driven, then the gate drive voltage that opens the door/close by high power valve output on the motherboard also feeds back to this function module, provide gate drive voltage monitoring discrete magnitude by dividing potential drop and mu balanced circuit, its type is a Transistor-Transistor Logic level, if then represent to have gate drive voltage output during high level.
7. according to the control system of intake valve assembly in the described auxiliary power unit of claim 3～6, it is characterized in that: described amplifier N10C output voltage is the corresponding 0.1V voltage of every 1A exciting current.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910254456A CN101737182A (en) | 2009-12-23 | 2009-12-23 | Control system of intake valve assembly in auxiliary power unit |
| CN2010102420108A CN101922365B (en) | 2009-12-23 | 2010-07-30 | Control system of intake valve assembly in auxiliary power device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910254456A CN101737182A (en) | 2009-12-23 | 2009-12-23 | Control system of intake valve assembly in auxiliary power unit |
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| CN101737182A true CN101737182A (en) | 2010-06-16 |
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| CN200910254456A Pending CN101737182A (en) | 2009-12-23 | 2009-12-23 | Control system of intake valve assembly in auxiliary power unit |
| CN2010102420108A Active CN101922365B (en) | 2009-12-23 | 2010-07-30 | Control system of intake valve assembly in auxiliary power device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106462154A (en) * | 2014-03-31 | 2017-02-22 | 伯斯有限公司 | Method and system for detecting integrity of a control loop of a physical system |
| CN111038714A (en) * | 2019-11-28 | 2020-04-21 | 中国航空工业集团公司西安航空计算技术研究所 | Over-rotation detection device and method for auxiliary power device |
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| CN105116867B (en) * | 2015-06-29 | 2019-02-19 | 中国商用飞机有限责任公司 | APU inlet flap actuator fault handling method and device |
| US10118715B2 (en) | 2017-02-20 | 2018-11-06 | Pratt & Whitney Canada Corp. | System and method for auxiliary power unit inlet door testing |
| CN111645866B (en) * | 2020-05-27 | 2023-05-09 | 中国航空工业集团公司西安航空计算技术研究所 | Auxiliary power device air inlet valve control system and method |
| CN112487711B (en) * | 2020-11-25 | 2021-08-31 | 江苏科技大学 | AltaRica fault tree generation method and system based on probability distribution |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1300694C (en) * | 2003-06-08 | 2007-02-14 | 华为技术有限公司 | Fault tree analysis based system fault positioning method and device |
| US6810841B1 (en) * | 2003-08-16 | 2004-11-02 | Ford Global Technologies, Llc | Electronic valve actuator control system and method |
| US7865290B2 (en) * | 2007-10-09 | 2011-01-04 | Ford Global Technologies, Llc | Valve control synchronization and error detection in an electronic valve actuation engine system |
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2009
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106462154A (en) * | 2014-03-31 | 2017-02-22 | 伯斯有限公司 | Method and system for detecting integrity of a control loop of a physical system |
| CN106462154B (en) * | 2014-03-31 | 2019-03-12 | 伯斯有限公司 | For detecting the method and system of the integrality of the control loop of physical system |
| CN111038714A (en) * | 2019-11-28 | 2020-04-21 | 中国航空工业集团公司西安航空计算技术研究所 | Over-rotation detection device and method for auxiliary power device |
| CN111038714B (en) * | 2019-11-28 | 2021-02-26 | 中国航空工业集团公司西安航空计算技术研究所 | Over-rotation detection device and method for auxiliary power device |
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| Publication number | Publication date |
|---|---|
| CN101922365A (en) | 2010-12-22 |
| CN101922365B (en) | 2013-11-20 |
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Open date: 20100616 |