WO2014013206A1 - Calculateur de regulation de moteur et procede de detection de pannes d'un tel calculateur - Google Patents
Calculateur de regulation de moteur et procede de detection de pannes d'un tel calculateur Download PDFInfo
- Publication number
- WO2014013206A1 WO2014013206A1 PCT/FR2013/051745 FR2013051745W WO2014013206A1 WO 2014013206 A1 WO2014013206 A1 WO 2014013206A1 FR 2013051745 W FR2013051745 W FR 2013051745W WO 2014013206 A1 WO2014013206 A1 WO 2014013206A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- voltage
- current
- computer
- output
- control circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0218—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults
- G05B23/0224—Process history based detection method, e.g. whereby history implies the availability of large amounts of data
- G05B23/0227—Qualitative history assessment, whereby the type of data acted upon, e.g. waveforms, images or patterns, is not relevant, e.g. rule based assessment; if-then decisions
- G05B23/0229—Qualitative history assessment, whereby the type of data acted upon, e.g. waveforms, images or patterns, is not relevant, e.g. rule based assessment; if-then decisions knowledge based, e.g. expert systems; genetic algorithms
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/625—Regulating voltage or current wherein it is irrelevant whether the variable actually regulated is AC or DC
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
- G06F11/0706—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation the processing taking place on a specific hardware platform or in a specific software environment
- G06F11/0721—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation the processing taking place on a specific hardware platform or in a specific software environment within a central processing unit [CPU]
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
- G06F11/079—Root cause analysis, i.e. error or fault diagnosis
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/30—Monitoring
- G06F11/3003—Monitoring arrangements specially adapted to the computing system or computing system component being monitored
- G06F11/3013—Monitoring arrangements specially adapted to the computing system or computing system component being monitored where the computing system is an embedded system, i.e. a combination of hardware and software dedicated to perform a certain function in mobile devices, printers, automotive or aircraft systems
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/30—Monitoring
- G06F11/3055—Monitoring arrangements for monitoring the status of the computing system or of the computing system component, e.g. monitoring if the computing system is on, off, available, not available
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/18—Modifications for indicating state of switch
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
Definitions
- the invention relates to a motor control computer, for example an aircraft, and a fault detection method of such a computer.
- a motor control system 10 of the FADEC type there may be switches of the double mechanical relay type 11 called "contact monitored", as illustrated in FIG. 1, a double relay then switching a 28-volt circuit. and a monitoring circuit 12 to check the status of each contact.
- the voltage v is also measured in order to verify the proper operation of the switch, the corresponding load being referenced 13, Gnd being the ground.
- the object of the invention is to overcome these disadvantages.
- the invention relates to a motor control computer, for example an aircraft, comprising switches whose voltage switching type outputs are able to control certain actuators and a fault detection device internal or external to the computer comprising:
- this device furthermore comprises:
- an electrical control circuit whose three inputs are respectively connected to the outputs of each of these three circuits, which tests the current and voltage level, delivers an invalid status if the current is below a determined limit current and if the voltage is below a determined threshold voltage and makes it possible to detect a failure external to the computer.
- the device comprises:
- a discrete state control circuit whose inputs are connected to the output of the current acquisition circuits, acquisition of the input voltage and acquisition of the output voltage.
- the device comprises:
- the device comprises: an OR gate whose two inputs are respectively connected to the output of the electrical control circuit and whose other input is connected to the output of the difference control circuit,
- the electrical status at the output of the electrical control circuit corresponds to a failure if the following test is verified:
- the discrete state status at the output of the discrete state control circuit is considered “closed” if the following test is verified:
- the difference in output status of the difference control circuit determines that the state of the switch of the computer is consistent with a discrete demand signal:
- the discrete request signal corresponds to supplying the voltage switching type output with the discrete state "closed” then the deviation status is "no failure";
- the discrete request signal does not correspond to supplying the voltage switching type output with the discrete state "not closed” then the deviation status is "no failure";
- the computer of the invention makes it possible to detect external failures while the preceding solutions only make it possible to detect internal failures. Moreover there is no risk of distorting the fault detection, unlike relays mechanical, because the cases of failures are detected when the values of current and tension are null, the cases of breakdowns of the measures again being covered.
- the invention also relates to a method for detecting internal or external failures of such an engine control computer, for example an aircraft, comprising switches whose voltage-switching type outputs are able to control certain actuators and a device for detecting these failures, characterized in that a final equation is used giving a value "detected failure" which is the following:
- Figure 1 illustrates a device of the prior art.
- FIG. 2 illustrates the device of the invention.
- FIGS 3A and 3B illustrate the operation of the device of the invention.
- FIGS 4A to 4F illustrate different possible electrical configurations.
- the invention consists in using the current measurement flowing in a switch in a motor control computer, for example an aircraft, in combination with the voltage measurement in order to detect an internal fault as well. than external to the calculator. It is the combination of three circuits using the current and voltage measurements which makes it possible to verify that the corresponding command has been carried out correctly and that there is no fault. Such a solution is applicable to both mechanical switches and semiconductor switches, as long as there is a current measurement available.
- the device of the invention comprises:
- circuit 21 for acquiring the input voltage of this switch
- circuit 22 for acquiring the output voltage of this switch
- an OR gate 26 whose two inputs are respectively connected to the output of the electrical control circuit 23 (electrical status) and whose other input is connected to the output of the difference control circuit 25 (gap status) ,
- a confirmation / rehabilitation circuit 27 whose input is connected to the OR gate output (command status not confirmed) and whose output delivers the validity status of the command.
- the electrical control circuit 23 tests the current and voltage level, and delivers an invalid status if the current is lower than a determined limit current (set according to the load concerned) and if the voltage is lower than a threshold voltage determined (corresponding to a voltage lower than the no-load voltage). This circuit makes it possible to detect a failure external to the computer.
- the discrete state control circuit 24 tests whether the current level flowing in the switch is greater than a threshold corresponding to half the current charging power. This circuit makes it possible to detect that the load is fed and thus to determine the state of the switch.
- the gap control circuit 25 tests whether the state of the switch corresponds to the desired set point. This circuit makes it possible to detect a difference between the setpoint and the command.
- Figure 3A is a voltage switching type output with very high current and low current.
- Figure 3B corresponds to a voltage switching (SVO) with high current.
- the calculator provides input and output voltage measurements and input current.
- the purpose of the device of the invention illustrated in FIG. 2 is to make it possible to know if the electric switching type output control is identical to the voltage switching type output request.
- Figures 4A and 4D illustrate the possible electrical configurations including normal operation and cases of external failures. It is considered that the position of the load does not change the logical structure of this device.
- a low voltage and a low current measured inside the engine control computer correspond to an electrical failure.
- High current means that the voltage-switched output is activated by the motor control computer and energized.
- the thresholds used to define the "low” and “high” states depend on the voltage switching type output category.
- the current thresholds are based on the assumption that a very high voltage switching type output current corresponds to a charging current of between 0.5A and 5A, that a high current SVO corresponds to a charging current between 0.5A and 1A and that a low current corresponds to a charging current of between 80 mA and 150 mA.
- the electrical control circuit 23 makes it possible to know if there is an electrical failure outside the computer. Measurements given by the computer make it possible to detect a short circuit or open circuit failure. An electrical status corresponds to a failure if the following test is verified:
- the discrete state control circuit 24 makes it possible to know if the switch, which controls the voltage-switching type output inside the computer, is closed. A discrete state is considered “closed” if the following test is verified:
- the difference control circuit 25 makes it possible to know if the state of the switch inside the calculator is coherent with the discrete request:
- the discrete request is to supply the voltage switching type output with the discrete state "closed” then the error status is "no fault”; - or if the discrete request does not correspond to supplying the voltage switching type output with the discrete state "not closed” then the deviation status is "no failure”;
- the use of the device of the invention makes it possible to know if the voltage switching type output control is tainted by an electrical failure or a gap failure.
- Each variable is 1 when the condition is true, 0 if the condition is false.
- a resistive load controlled by a voltage-switching type output under a voltage of 28Vdc and consuming a nominal current of 1A is considered.
- the equivalent diagram is illustrated in Figure 3B.
- the supply current being 1 A is fixed a threshold, knowing that in a dual-channel computer there are two switches in parallel.
- the current must be less than half of the nominal current, therefore less than 0.5 A.
- the measurement accuracy of this current is taken into account.
- this current threshold must be less than 0.45 A.
- a residual current may circulate inside the computer.
- the threshold can not be too close to 0. It can be set at 0.4A for example.
- the threshold it is necessary to take into account the accuracy of the re-measurement of voltage. Thus we can not take a threshold at 0V even if it corresponds theoretically to reality. If the calculator is accurate to 2V for example, the threshold can be chosen at 3V.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Quality & Reliability (AREA)
- General Engineering & Computer Science (AREA)
- Computing Systems (AREA)
- Automation & Control Theory (AREA)
- Radar, Positioning & Navigation (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Mathematical Physics (AREA)
- Evolutionary Biology (AREA)
- Bioinformatics & Computational Biology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/415,908 US9690643B2 (en) | 2012-07-20 | 2013-07-18 | Engine-control computer and method for detecting failures of such a computer |
| GB1500740.4A GB2518324B (en) | 2012-07-20 | 2013-07-18 | Engine-control computer and method for detecting failures of such a computer |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1257033 | 2012-07-20 | ||
| FR1257033A FR2993684B1 (fr) | 2012-07-20 | 2012-07-20 | Dispositif et procede de detection de pannes sur des commandes de sortie de type a commutation de tension dans un calculateur de regulation de moteur d'aeronef |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014013206A1 true WO2014013206A1 (fr) | 2014-01-23 |
Family
ID=47022843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2013/051745 Ceased WO2014013206A1 (fr) | 2012-07-20 | 2013-07-18 | Calculateur de regulation de moteur et procede de detection de pannes d'un tel calculateur |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US9690643B2 (fr) |
| FR (1) | FR2993684B1 (fr) |
| GB (1) | GB2518324B (fr) |
| WO (1) | WO2014013206A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108037469B (zh) * | 2017-10-23 | 2020-06-16 | 上海科梁信息工程股份有限公司 | 飞机电源特性测试系统及方法 |
| JP7764422B2 (ja) * | 2023-04-28 | 2025-11-05 | 矢崎総業株式会社 | 短絡判定回路 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4757417A (en) * | 1984-04-19 | 1988-07-12 | The Nippon Signal Co., Ltd. | Monitoring system for load-driving switch circuits |
| EP1052518A1 (fr) * | 1999-05-13 | 2000-11-15 | STMicroelectronics S.r.l. | Dispositif de diagnostique complet d'un circuit d'attaque |
| GB2441625A (en) * | 2006-09-08 | 2008-03-12 | Ford Global Tech Llc | FET monitoring and protection system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009145678A1 (fr) * | 2008-05-26 | 2009-12-03 | Volvo Technology Corporation | Module interrupteur pour un réseau d'alimentation électrique et réseau d'alimentation électrique comprenant au moins un module interrupteur |
-
2012
- 2012-07-20 FR FR1257033A patent/FR2993684B1/fr active Active
-
2013
- 2013-07-18 WO PCT/FR2013/051745 patent/WO2014013206A1/fr not_active Ceased
- 2013-07-18 GB GB1500740.4A patent/GB2518324B/en active Active
- 2013-07-18 US US14/415,908 patent/US9690643B2/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4757417A (en) * | 1984-04-19 | 1988-07-12 | The Nippon Signal Co., Ltd. | Monitoring system for load-driving switch circuits |
| EP1052518A1 (fr) * | 1999-05-13 | 2000-11-15 | STMicroelectronics S.r.l. | Dispositif de diagnostique complet d'un circuit d'attaque |
| GB2441625A (en) * | 2006-09-08 | 2008-03-12 | Ford Global Tech Llc | FET monitoring and protection system |
Also Published As
| Publication number | Publication date |
|---|---|
| US20150205655A1 (en) | 2015-07-23 |
| GB201500740D0 (en) | 2015-03-04 |
| GB2518324B (en) | 2017-09-13 |
| GB2518324A (en) | 2015-03-18 |
| FR2993684B1 (fr) | 2015-07-03 |
| US9690643B2 (en) | 2017-06-27 |
| FR2993684A1 (fr) | 2014-01-24 |
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