CN111273639A - Fault simulation device and method for automobile electric power steering system - Google Patents
Fault simulation device and method for automobile electric power steering system Download PDFInfo
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- CN111273639A CN111273639A CN202010118530.1A CN202010118530A CN111273639A CN 111273639 A CN111273639 A CN 111273639A CN 202010118530 A CN202010118530 A CN 202010118530A CN 111273639 A CN111273639 A CN 111273639A
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- 238000004088 simulation Methods 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims abstract description 33
- 238000012545 processing Methods 0.000 claims abstract description 10
- 238000000605 extraction Methods 0.000 claims abstract description 5
- 230000001276 controlling effect Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000003745 diagnosis Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
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- 230000002159 abnormal effect Effects 0.000 description 1
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- 230000003044 adaptive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
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- 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
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
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- 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
- G05B23/0259—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the response to fault detection
Abstract
The invention belongs to the technical field of EPS fault simulation, and discloses a fault simulation device and method for an automobile electric power steering system, wherein the device comprises: the signal simulation unit comprises a plurality of normal signal generation modules and fault signal generation modules; the signal output unit at least comprises a torque signal output circuit, a vehicle speed signal output circuit and an engine rotating speed output circuit, and the input end of each output circuit is connected with the corresponding normal signal generation module and the corresponding fault signal generation module through a group of relays; the signal output unit also comprises an integrated interface circuit, and the output end of the integrated interface circuit is connected with an EPS controller; the fault code processing unit is connected with the EPS controller and comprises a fault code extraction module, a fault code analysis unit and a comparison unit; in conclusion, the invention can effectively simulate various fault conditions which may be met by the EPS system, and thus, the EPS controller can be efficiently detected.
Description
Technical Field
The invention belongs to the technical field of EPS fault simulation, and particularly relates to a fault simulation device and method for an automobile electric power steering system.
Background
For a traditional hydraulic power-assisted steering system, an electric power-assisted steering (EPS) system of an automobile provides power assistance by a motor, and has the advantages of variable power assistance characteristic, energy conservation, simple structure and the like. The EPS mainly comprises a controller, a torque sensor, a motor, a speed reducer, a mechanical steering structure and the like, and the working principle is as follows: when the steering wheel is rotated to rotate the steering shaft, the torque sensor starts to work, relative rotation displacement generated by the input shaft and the output shaft under the action of the torsion bar is converted into an electric signal and transmitted to the EPS controller, and the EPS controller determines the rotation direction and the power-assisted current of the power-assisted motor according to signals of the vehicle speed sensor and the torque sensor, so that the power-assisted steering is controlled in real time.
In practical application, the EPS controller has a function of controlling the motor to provide steering power, and also has a fault diagnosis function, so that when the system is abnormal, the EPS controller can make a correct response to ensure driving safety. In addition, according to the position of the fault, a corresponding fault code can be generated in the EPS controller so as to record the fault position and facilitate subsequent maintenance.
Therefore, in the production of the EPS system, the test of the fault diagnosis function of the EPS controller is particularly important, but in the prior art, the verification and the check are mostly performed by normal detection or artificial fault manufacture in a real vehicle test, the operation is troublesome, and the cost is high.
Disclosure of Invention
In view of the above, the invention provides a fault simulation device and method for an electric power steering system of an automobile, so as to achieve the fault simulation effect of an EPS system and realize the test of an EPS controller based on the fault simulation effect.
In order to achieve the purpose, the invention provides the following technical scheme:
an automotive electric power steering system fault simulation device, comprising: the device comprises a control unit, a signal simulation unit, a signal output unit and a fault code processing unit;
the signal simulation unit comprises a plurality of normal signal generation modules and fault signal generation modules, and corresponding signal simulation software is integrated in each of the two signal generation modules so as to generate normal signals or fault signals when the automobile electric power steering system works;
the signal output unit at least comprises a torque signal output circuit, a vehicle speed signal output circuit and an engine rotating speed output circuit, the input end of each output circuit is connected with the corresponding normal signal generation module and the corresponding fault signal generation module through a group of relays, the number of the group of relays is two, and one of the two relays is closed and electrically connected with the control unit; the signal output unit also comprises an integrated interface circuit, the output end of each output circuit is connected with the integrated interface circuit, and the output end of the integrated interface circuit is connected with an EPS controller;
the fault code processing unit is connected with the EPS controller and comprises a fault code extraction module, a fault code analysis unit and a comparison unit.
Preferably, the control unit comprises a touch screen display module, an automatic control module and a manual control module; selecting a control mode in a control unit and displaying a control state based on the touch screen display module; an intelligent sequencing program is integrated in the automatic control module, and a plurality of groups of relays are sequentially sequenced and automatically started and stopped; the manual control module comprises an input keyboard, a plurality of input keys are arranged on the input keyboard, and each input key corresponds to one group of relays.
Preferably, each of the input keys includes a high-level contact pin and a low-level contact pin, and the two contact pins correspond to the two relays respectively.
Preferably, the device further comprises an environment simulation unit, and the EPS controller is arranged in the environment simulation unit to realize simulation of the working environment of the EPS controller.
Preferably, the environment simulation unit includes at least a temperature module.
Preferably, an output interface of the EPS controller is connected with a relay, and the output interface is used for being connected with a motor in an automobile electric power steering system.
A fault simulation method for an automobile electric power steering system comprises the following steps:
s1, simulating a working environment where an EPS controller is located based on an environment simulation unit;
s2, selecting a control mode of a control unit based on the touch screen display module;
s3, regulating and controlling a plurality of groups of relays based on the control unit so as to drive the corresponding normal signal generation module and the corresponding fault signal generation module;
s4, generating a signal group required by an EPS controller of the automobile electric power steering system during working based on the started normal signal generation module and the started fault signal generation module in a simulation mode, wherein the signal group comprises a normal signal and a fault signal;
s5, acquiring a signal group based on a signal output unit by the EPS controller, and generating a fault code;
and S6, the fault code processing unit acquires the fault code, and analyzes, identifies and compares the fault code.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, based on the simulation of the signal simulation unit, a signal group which has diversity and is adaptive to the EPS controller can be effectively generated, so that the integral simulation device can effectively drive the EPS controller to respond, and the signal group comprises a normal signal and a fault signal, so that the faults possibly encountered by the electric power steering system of the automobile in actual conditions can be effectively simulated, and the high-efficiency detection and judgment of the EPS controller under various fault conditions can be further realized; the diversity of the signal group is driven based on the opening and closing of the relay, and the relay is simple in structure and low in cost.
The invention also extracts, decodes and analyzes the fault code generated by the EPS controller based on the fault code processing unit to identify and determine the fault position corresponding to the fault code, and simultaneously compares the determined fault position with the fault signal generation module started in the signal simulation unit, thereby further judging the reliability and safety of the fault diagnosis performance of the EPS controller.
Drawings
FIG. 1 is a block diagram of a fault simulation apparatus provided in the present invention;
fig. 2 is a structural diagram of a control unit in the fault simulation apparatus provided in the present invention;
FIG. 3 is a schematic diagram of the input key and relay in the fault simulation apparatus provided in the present invention;
FIG. 4 is a simplified flow diagram of a fault simulation method provided by the present invention;
FIG. 5 is a detailed flow chart of a fault simulation method provided by the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The present embodiment provides a fault simulation apparatus for an electric power steering system of an automobile, a structure diagram of the apparatus is shown in fig. 1, and the apparatus specifically includes:
a control unit.
And the environment simulation unit is used for realizing the simulation of the working environment of the EPS controller and at least comprises a temperature module.
And the signal simulation unit comprises a plurality of normal signal generation modules and fault signal generation modules, and corresponding signal simulation software is integrated in each of the two signal generation modules so as to realize the generation of normal signals or fault signals when the automobile electric power steering system works.
The signal output unit at least comprises a torque signal output circuit, a vehicle speed signal output circuit and an engine rotating speed output circuit, the corresponding signal simulation unit at least comprises a normal signal generation module and a fault signal generation module of a torque signal, a vehicle speed signal and an engine rotating speed, in the embodiment, the three signals form a group of signal groups, the input end of each output circuit is connected with the corresponding normal signal generation module and the corresponding fault signal generation module through a group of relays KA, the number of the group of relays KA is two, and one of the two relays KA is closed and electrically connected with the control unit; in addition, different signal sets can be further formed by different opening and closing of a plurality of groups of relays KA so as to meet the requirement that different fault conditions are simulated in the whole device;
the signal output unit also comprises an integrated interface circuit, the output end of each output circuit is connected with the integrated interface circuit, the output end of the integrated interface circuit is connected with an EPS controller, the EPS controller is arranged in the environment simulation unit, one output interface is connected with a relay KV, and the output interface is used for being connected with a motor in the automobile electric power steering system; therefore, when the EPS controller detects a fault signal, the relay KV can be timely switched off, and the fault diagnosis performance of the EPS controller can be preliminarily judged based on the relay KV.
The fault code processing unit is connected with the EPS controller and comprises a fault code extraction module, a fault code analysis unit and a comparison unit; specifically, a fault code extraction module acquires a corresponding fault code from the EPS controller, a fault code analysis unit decodes and analyzes the fault code to identify and determine a fault position corresponding to the fault code, and a comparison unit compares the fault position acquired by the fault code analysis unit with a fault signal generation module started in a signal simulation unit, so that the reliability and the safety of the fault diagnosis performance of the EPS controller are further judged.
Preferably, as shown in fig. 2, the control unit includes a touch screen display module, an automatic control module and a manual control module;
selecting a control mode in the control unit and displaying a control state based on the touch screen display module; the method aims to effectively observe the simulation state and the final detection result in the whole simulation process;
the automatic control module is internally integrated with an intelligent sequencing program, and is used for sequencing and automatically opening and closing a plurality of groups of relays in sequence, for example, switching of fault signals or normal signals is performed in sequence according to the sequence of torque signals, vehicle speed signals and engine rotating speed: the first time is a normal torque signal, a fault vehicle speed signal and a fault engine rotating speed; the second time is a normal torque signal, a normal vehicle speed signal and a fault engine rotating speed;
the manual control module comprises an input keyboard, a plurality of input keys are arranged on the input keyboard, and each input key corresponds to one group of relays.
Further, as shown in fig. 3, each input key includes a high-level contact pin and a low-level contact pin, and the two contact pins correspond to the two relays, respectively. Specifically, as can be seen from fig. 3, pressing the input key contacts one of the relays, and lifting the input key contacts the other relay, which is suitable for alternatively closing the two proposed relays.
Example two
The embodiment provides a method for simulating a fault of an electric power steering system of an automobile, and a flow chart of the method is shown in fig. 4-5, and the method specifically comprises the following steps:
s1, simulating a working environment where an EPS controller is located based on an environment simulation unit; the simulation method is mainly used for simulating the working response of the EPS controller under the normal-temperature environment, the high-temperature environment and the low-temperature environment based on the temperature module so as to further improve the simulation performance of the whole simulation device and the simulation method.
S2, selecting a control mode of a control unit based on the touch screen display module; specifically, when the whole device is started, two touch screen selection keys of automatic control and manual control are displayed through the touch screen display module, and a selection effect is achieved based on finger touch of an operator.
S3, regulating and controlling a plurality of groups of relays based on the control unit so as to drive the corresponding normal signal generation module and the corresponding fault signal generation module;
s4, generating a signal group required by an EPS controller of the automobile electric power steering system during working based on the started normal signal generation module and the started fault signal generation module in a simulation mode, wherein the signal group comprises a normal signal and a fault signal;
s5, acquiring a signal group based on a signal output unit by the EPS controller, and generating a fault code;
and S6, the fault code processing unit acquires the fault code, and analyzes, identifies and compares the fault code.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. An automotive electric power steering system fault simulation device, characterized by comprising: the device comprises a control unit, a signal simulation unit, a signal output unit and a fault code processing unit;
the signal simulation unit comprises a plurality of normal signal generation modules and fault signal generation modules, and corresponding signal simulation software is integrated in each of the two signal generation modules so as to generate normal signals or fault signals when the automobile electric power steering system works;
the signal output unit at least comprises a torque signal output circuit, a vehicle speed signal output circuit and an engine rotating speed output circuit, the input end of each output circuit is connected with the corresponding normal signal generation module and the corresponding fault signal generation module through a group of relays, the number of the group of relays is two, and one of the two relays is closed and electrically connected with the control unit; the signal output unit also comprises an integrated interface circuit, the output end of each output circuit is connected with the integrated interface circuit, and the output end of the integrated interface circuit is connected with an EPS controller;
the fault code processing unit is connected with the EPS controller and comprises a fault code extraction module, a fault code analysis unit and a comparison unit.
2. The fault simulation device for the electric power steering system of the automobile according to claim 1, wherein: the control unit comprises a touch screen display module, an automatic control module and a manual control module; selecting a control mode in a control unit and displaying a control state based on the touch screen display module; an intelligent sequencing program is integrated in the automatic control module, and a plurality of groups of relays are sequentially sequenced and automatically started and stopped; the manual control module comprises an input keyboard, a plurality of input keys are arranged on the input keyboard, and each input key corresponds to one group of relays.
3. The fault simulation device for the electric power steering system of the automobile according to claim 2, wherein: each input key comprises a high-level contact pin and a low-level contact pin, and the two contact pins respectively correspond to the two relays.
4. The fault simulation device for the electric power steering system of the automobile according to claim 1, wherein: the EPS controller is arranged in the environment simulation unit to realize the simulation of the working environment of the EPS controller.
5. The failure simulation device for the electric power steering system of the automobile according to claim 4, wherein: the environment simulation unit at least comprises a temperature module.
6. The failure simulation device for the electric power steering system of the automobile according to any one of claim 1, wherein: and an output interface of the EPS controller is connected with a relay, and the output interface is used for being connected with a motor in an automobile electric power steering system.
7. A fault simulation method for an automobile electric power steering system is characterized by comprising the following steps:
regulating and controlling a plurality of groups of relays based on the control unit so as to realize the driving of the corresponding normal signal generation module and the fault signal generation module;
simulating and generating a signal group required by an EPS controller of an automobile electric power steering system when the automobile electric power steering system works, wherein the signal group comprises a normal signal and a fault signal;
the EPS controller acquires a signal group based on the signal output unit and generates a fault code;
and the fault code processing unit acquires the fault code, and analyzes, identifies and compares the fault code.
8. The method for simulating the fault of the electric power steering system of the automobile according to claim 7, wherein: before the plurality of sets of relays are regulated, the method further comprises the step of selecting a control mode of the control unit based on the touch screen display module.
9. The method for simulating the fault of the electric power steering system of the automobile according to claim 8, wherein: before the control mode is selected, the method further comprises the step of simulating the working environment of the EPS controller based on the environment simulation unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010118530.1A CN111273639A (en) | 2020-02-26 | 2020-02-26 | Fault simulation device and method for automobile electric power steering system |
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| CN202010118530.1A CN111273639A (en) | 2020-02-26 | 2020-02-26 | Fault simulation device and method for automobile electric power steering system |
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| CN102662394A (en) * | 2012-05-08 | 2012-09-12 | 清华大学 | Fault simulation device for automobile electric power-assisted steering system |
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| CN105136486A (en) * | 2015-09-23 | 2015-12-09 | 安徽江淮汽车股份有限公司 | Measurement and control bench of comprehensive properties of electric power steering system and measurement and control method |
| CN105551333A (en) * | 2015-12-28 | 2016-05-04 | 南京理工大学 | EPS performance teaching test system based on automatic driving control |
| WO2016080092A1 (en) * | 2014-11-19 | 2016-05-26 | 日立オートモティブシステムズ株式会社 | Fault simulation system |
| JP2017004079A (en) * | 2015-06-05 | 2017-01-05 | 日立オートモティブシステムズ株式会社 | Failure simulation apparatus and failure simulation method |
| CN206906883U (en) * | 2017-02-08 | 2018-01-19 | 武汉楚冠捷汽车科技有限公司 | A kind of full-automatic trouble-shooter of automobile EPS |
-
2020
- 2020-02-26 CN CN202010118530.1A patent/CN111273639A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102662394A (en) * | 2012-05-08 | 2012-09-12 | 清华大学 | Fault simulation device for automobile electric power-assisted steering system |
| WO2016080092A1 (en) * | 2014-11-19 | 2016-05-26 | 日立オートモティブシステムズ株式会社 | Fault simulation system |
| CN204347607U (en) * | 2015-01-07 | 2015-05-20 | 江苏超力电器有限公司 | Automobile electric power-assisted steering controller hardware online simulation device |
| JP2017004079A (en) * | 2015-06-05 | 2017-01-05 | 日立オートモティブシステムズ株式会社 | Failure simulation apparatus and failure simulation method |
| CN105136486A (en) * | 2015-09-23 | 2015-12-09 | 安徽江淮汽车股份有限公司 | Measurement and control bench of comprehensive properties of electric power steering system and measurement and control method |
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Application publication date: 20200612 |