CN101135611A - Emulation test-bed of vehicle electric power-assisted steering device - Google Patents
Emulation test-bed of vehicle electric power-assisted steering device Download PDFInfo
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- CN101135611A CN101135611A CNA2007100700583A CN200710070058A CN101135611A CN 101135611 A CN101135611 A CN 101135611A CN A2007100700583 A CNA2007100700583 A CN A2007100700583A CN 200710070058 A CN200710070058 A CN 200710070058A CN 101135611 A CN101135611 A CN 101135611A
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- 238000012360 testing method Methods 0.000 claims abstract description 37
- 238000004088 simulation Methods 0.000 claims abstract description 17
- 239000006247 magnetic powder Substances 0.000 abstract 1
- 238000001228 spectrum Methods 0.000 description 4
- 238000012356 Product development Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 238000011217 control strategy Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000036581 peripheral resistance Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
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Abstract
The simulation test bed comprises: car steering wheel, car steering column, electrically-driven power assisted steering unit, magnetic powder loader, corner sensor, servo motor, driving speed signal generator controlled by the electronic pedal, micro processor and computer. The input force moment of the steering wheel is manually provided by the test staff; the signal for simulating the road surface frictional resistance and the signal for simulating the road condition resistance are provided by the micro processor via the magnetic power loader and servo motor.
Description
Technical field
The present invention relates to be used for the simulation test stand of vehicle electric power-assisted steering device.
Background technology
Automobile industry, since the eighties of last century the eighties, the development of various automobile electric control systems has become a ring significant in the automobile product development.In the performance history of automobile electric control system, emulation technology is because can be at the commitment of product development, particularly still do not have sample car can for the domination situation under, the performance test that is control system provides one near actual experimental enviroment with checking, has formed an important tool in the product development process.Wherein half (Hardware-In-Loop) emulation in kind is called for short HIL emulation and has obtained using widely.
In the HIL analogue system, the control device of being developed (as power-assisted steering control, engine control, braking anti-lock control, gear shift control etc.) is with the physical form connecting system, and controll plant (as vehicle complete vehicle or associated components) is then realized by Computer Simulation by means of corresponding mathematical model.Like this, do not need the material object of controll plant, just can carry out various test or the evaluations that approach actual service conditions control device.
Part as the automobile chassis electronic control system, electric power steering (Electrical PowerSteering, be called for short EPS) system and traditional hydraulic booster system comparison, replaced traditional servohydraulic cylinder with monolithic processor controlled direct current generator, have characteristics such as parts are few, volume is little, easy to maintenance, and increase substantially vehicle economy, dynamic property and maneuverability, increase the handling comfort and the security of human pilot simultaneously.Therefore, EPS is one of field of the present primary study of global famous motor corporation, also more and more is subjected to consumer's favor.
Yet EPS still is in the starting stage of research and development at home, to its performance detection with often finish from the checking of control strategy at breadboard conventional test stand.Common EPS bench test, general is exactly to provide a constant moment of torsion with servomotor earlier to simulate the bearing circle input, obtains some parameters relevant with the EPS assist characteristic such as EPS current of electric, steering column torsion bar torque or the like by sensor then.Though these test findings are precious for the exploitation of EPS system, they have the shortcoming of the many situations property, authenticity and the people's that lack the real roads test subjective assessment, can't go into operation for product further technical support is provided.
So, EPS simulation hardware testing table its meaning for the early development of EPS product that combines various actual service conditionss is self-evident.Because this simulation test stand almost can reach the effect of complete vehicle test, and cost may only be equivalent to the sub-fraction of complete vehicle test.
Summary of the invention
Based on above consideration, the purpose of this invention is to provide and a kind ofly can under lab simulate the simulation test stand that real roads is carried out the vehicle electric power-assisted steering device of a series of bearing circle road feel test, the performance of automobile electric power-assisted steering product is carried out objective evaluation to be implemented in the laboratory.
The simulation test stand of vehicle electric power-assisted steering device of the present invention comprises vehicle steering, and car steering tube column is installed in the electric power-assisted steering apparatus on the car steering tube column, it is characterized in that this simulation test stand also comprises:
The magnetic loader, the pavement friction resistance when being used for simulated automotive and turning to is installed on the car steering tube column:
Rotary angle transmitter is used to gather the angular signal of bearing circle torsion bar, is installed on the car steering tube column;
Servomotor, the rotating shaft of motor links to each other with car steering tube column by gear engagement mechanism;
The vehicle speed signal generator of electronic pedal control produces vehicle speed signal;
Microprocessor, two input end links to each other with the output terminal of rotary angle transmitter with the vehicle speed signal generator respectively, the signal end of the simulated roadway frictional resistance of output links to each other with the input end of magnetic loader through magnetic loader driving circuit, and the signal end of the simulation road conditions resistance of output links to each other with servomotor;
Computer, storage test figure and demonstration in real time, it links to each other with electric power-assisted steering apparatus and microprocessor.
Principle of work of the present invention is as follows:
The testing crew power-on, use the hand steering wheel rotation, the electronic pedal that tramps with one's feet down simultaneously produces vehicle speed signal, the rotary angle transmitter that be installed on the steering column this moment will begin to gather the angular signal of bearing circle torsion bar and be input to microprocessor together with vehicle speed signal, then by microprocessor internal programmed control output two-way pulse width modulation electrical current signal, after amplifying through magnetic loader driving circuit, one tunnel pulse width modulation electrical current signal outputs to the input end of magnetic loader, the pavement friction resistance when being used for simulated automotive and turning to; Another road pulse width modulation electrical current signal then according to the spectrum of road surface roughness data file that is stored in microprocessor internal, is exported to servomotor under the control of microprocessor, be used for some road surface input resistances at random that simulated automotive may run in actual road conditions.The host computer interface program of being stored in the computer then can carry out real-time tracking to the process of test, also can be input to the parameter of different spectrums of road surface roughness, different automobile types in the microprocessor with the routine interface of microprocessor and go, so just can repeat many group tests and obtain more experiment information by computer.
Beneficial effect of the present invention is:
The present invention has adopted the bearing circle input torque manually to be provided by testing crew, and the mode that the road surface input is provided jointly by magnetic loader and servomotor.Can adjust the control strategy parameter of automobile electric power steering (EPS) device by computing machine, steering drag input and road surface were imported at random when simulating vehicle travelled, and allowed testing crew just can simulate road feel intensity after different automobile types has been installed the EPS device under the different pavement conditions and the power-assisted ability of EPS in the laboratory.Compare with traditional EPS testing table, the present invention can not only write down the required EPS controlled variable of EPS product objective evaluation, has more introduced road spectrum information and people's subjective assessment, can provide abundanter more intuitive Test Information for the designer.The present invention can save the test funds greatly because be the l-G simulation test of half material object.
Description of drawings
Fig. 1 is the synoptic diagram of simulation test stand of the present invention;
Fig. 2 is a kind of physical circuit example of magnetic loader driving circuit;
Fig. 3 is a kind of instantiation of the vehicle speed signal generator of electronic pedal control.
Embodiment
Further specify the present invention below in conjunction with accompanying drawing.
With reference to Fig. 1, the simulation test stand of vehicle electric power-assisted steering device of the present invention comprises vehicle steering 1, electric power-assisted steering apparatus 2, car steering tube column 3, magnetic loader 4, rotary angle transmitter 6, servomotor 7, magnetic loader driving circuit 8, microprocessor 9, computer 10 and by foot-controlled vehicle speed signal generator 11.Wherein vehicle steering 1 is fixed together with car steering tube column 3, electric power-assisted steering apparatus 2, rotary angle transmitter 6 and magnetic loader 4 are installed on the car steering tube column 3, the rotating shaft of servomotor 7 links to each other with car steering tube column 3 by gear engagement mechanism 5, the output terminal of rotary angle transmitter 6 links to each other with the input end of microprocessor 9 respectively with the output terminal of the vehicle speed signal generator 11 of electronic pedal control, the input end of magnetic loader 4 links to each other with the output terminal of microprocessor 9 through magnetic loader driving circuit 8, the electrical input of servomotor 7 links to each other with the output terminal of microprocessor 9, and computer 10 links to each other with electric power-assisted steering apparatus 2 and microprocessor 9.
Shown in Figure 2 is a kind of magnetic loader driving circuit, and in the legend, magnetic loader driving circuit comprises chip 4N25, logic inverter 7406, and some peripheral resistance, electric capacity, diode element.The pin 3 of 4N25 links to each other with first not gate 7406 that connects microprocessor, pin 1 is connected with+5V power supply by resistance R 1, pin 6 is connected with+12V power supply by resistance R 2, and be connected to the base stage of triode D2025 by second not gate 7406 and resistance R 3, the grounded emitter of triode, collector is connected with+12V power supply by diode and resistance R 4, the magnetic loader is connected+12V power supply and transistor collector between.
A kind of implementation of vehicle speed signal generator 11 shown in Figure 3.It is by chip NE555, and accelerator pedal mechanism and some peripheral resistance, electric capacity are formed.Pin 1 ground connection of NE555, pin 5 and pin 6 pass through capacity earth respectively, pin 4 and pin 8 connect+the 12V power supply altogether, pin 7 and+insert potentiometer W1 between the 12V power supply, this potentiometer W1 links to each other with accelerator pedal mechanism, by the resistance of accelerator pedal mechanism change potentiometer, in the pin 3 output vehicle speed signal of chip NE555.
In the present invention, vehicle steering 1, electric power-assisted steering apparatus 2 and car steering tube column 3 have constituted the in-kind portion of motorcar electric steering gear simulating experimental system jointly, and they also are so to connect in the wheel steering system of reality.Microprocessor 9, servomotor 7, magnetic loader 4 and driving circuit 8 thereof, rotary angle transmitter 6, vehicle speed signal generator 11 and computer 10 then are the simulation parts of simulating experimental system.When on-test, testing crew is power-on at first, activates electric power-assisted steering apparatus 2, and the while pin is stepped on electronic pedal makes vehicle speed signal generator 11 send vehicle speed signal, and rotates vehicle steering 1 with hand.At this time microprocessor 9 begins to receive the signal that rotary angle transmitter 6 and vehicle speed signal generator 11 transmit, program by inside storage and spectrum of road surface roughness file are controlled magnetic loader 4 and servomotor 7 respectively to car steering tube column 3 output torques, thereby reach the effect of simulates real physical circuit face input.Wherein 4 simulations of magnetic loader is the static state input on road surface, i.e. tire one surface resistance under the different speed of a motor vehicle conditions and the aligning torque of vehicle itself when Vehicular turn, what servomotor 7 was simulated then is the dynamic random input on road surface, and the road irregularity of running into during as Vehicular turn disturbs or the like.The effect of computer 10 is exactly demonstration in real time, storage test figure, makes things convenient for testing crew that process of the test is monitored and managed.
Microprocessor among the present invention can adopt the MC9S12D series microprocessor of Freescale (Freescale) semiconductor company, the magnetic loader can be selected the product of the ZX-2.5YH model of MIT's production for use, servomotor can adopt the servomotor device of Wanda company design, the torque angle sensor that is exclusively used in automobile that rotary angle transmitter can be produced with U.S. BI company, speed of a motor vehicle generator can adopt the NE555 chip as signal generator.
Claims (1)
1. the simulation test stand of vehicle electric power-assisted steering device comprises vehicle steering (1), and car steering tube column (3) is installed in the electric power-assisted steering apparatus (2) on the car steering tube column (3), it is characterized in that this simulation test stand also comprises:
Magnetic loader (4), the pavement friction resistance when being used for simulated automotive and turning to is installed on the car steering tube column (3);
Rotary angle transmitter (6) is used to gather the angular signal of bearing circle torsion bar, is installed on the car steering tube column (3);
Servomotor (7), the rotating shaft of motor links to each other with car steering tube column (3) by gear engagement mechanism (5);
The vehicle speed signal generator (11) of electronic pedal control produces vehicle speed signal;
Microprocessor (9), two input end links to each other with the output terminal of rotary angle transmitter (6) with vehicle speed signal generator (11) respectively, the signal end of the simulated roadway frictional resistance of output links to each other through the input end of magnetic loader driving circuit (8) with magnetic loader (4), and the signal end of the simulation road conditions resistance of output links to each other with servomotor;
Computer (10), storage test figure and demonstration in real time, it links to each other with electric power-assisted steering apparatus (2) and microprocessor (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100700583A CN101135611A (en) | 2007-07-17 | 2007-07-17 | Emulation test-bed of vehicle electric power-assisted steering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100700583A CN101135611A (en) | 2007-07-17 | 2007-07-17 | Emulation test-bed of vehicle electric power-assisted steering device |
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| CN101135611A true CN101135611A (en) | 2008-03-05 |
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| CNA2007100700583A Pending CN101135611A (en) | 2007-07-17 | 2007-07-17 | Emulation test-bed of vehicle electric power-assisted steering device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITMI20090980A1 (en) * | 2009-06-05 | 2010-12-06 | Emmetec Srl | "UNIVERSAL ELECTRIC POWER STEERING UNITS TEST DEVICE" |
| CN106248406A (en) * | 2016-09-06 | 2016-12-21 | 吉林大学 | Commercial car novel electric hydraulic steering system simulator stand |
| CN108020433A (en) * | 2017-12-19 | 2018-05-11 | 浙江工业大学 | Utilize the method for electric boosting steering system test platform simulation test performance |
| CN109030031A (en) * | 2018-06-28 | 2018-12-18 | 郑州轻工业学院 | Automobile electric power-assisted steering controller performance test macro and method |
| CN112858908A (en) * | 2021-01-22 | 2021-05-28 | 一汽解放汽车有限公司 | System, method, device, equipment and storage medium for testing motor of steering gear |
| CN113092139A (en) * | 2021-04-30 | 2021-07-09 | 东风柳州汽车有限公司 | Steering wheel assembly operability verification device |
| CN114115203A (en) * | 2022-01-27 | 2022-03-01 | 天津德科智控股份有限公司 | Analog torque sensor based on NE555 design for EPS |
| CN114593923A (en) * | 2022-03-14 | 2022-06-07 | 湖南速特智能科技有限公司 | Automobile steering performance test method and system |
-
2007
- 2007-07-17 CN CNA2007100700583A patent/CN101135611A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITMI20090980A1 (en) * | 2009-06-05 | 2010-12-06 | Emmetec Srl | "UNIVERSAL ELECTRIC POWER STEERING UNITS TEST DEVICE" |
| EP2259041A1 (en) * | 2009-06-05 | 2010-12-08 | Emmetec S.r.l. | Universal test device for electric power steering units |
| CN106248406A (en) * | 2016-09-06 | 2016-12-21 | 吉林大学 | Commercial car novel electric hydraulic steering system simulator stand |
| CN106248406B (en) * | 2016-09-06 | 2019-03-08 | 吉林大学 | The novel electric hydraulic steering system simulator stand of commercial vehicle |
| CN108020433A (en) * | 2017-12-19 | 2018-05-11 | 浙江工业大学 | Utilize the method for electric boosting steering system test platform simulation test performance |
| CN108020433B (en) * | 2017-12-19 | 2020-01-31 | 浙江工业大学 | Method for simulating test performance by using electric power steering system test platform |
| CN109030031A (en) * | 2018-06-28 | 2018-12-18 | 郑州轻工业学院 | Automobile electric power-assisted steering controller performance test macro and method |
| CN112858908A (en) * | 2021-01-22 | 2021-05-28 | 一汽解放汽车有限公司 | System, method, device, equipment and storage medium for testing motor of steering gear |
| CN113092139A (en) * | 2021-04-30 | 2021-07-09 | 东风柳州汽车有限公司 | Steering wheel assembly operability verification device |
| CN114115203A (en) * | 2022-01-27 | 2022-03-01 | 天津德科智控股份有限公司 | Analog torque sensor based on NE555 design for EPS |
| CN114593923A (en) * | 2022-03-14 | 2022-06-07 | 湖南速特智能科技有限公司 | Automobile steering performance test method and system |
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Open date: 20080305 |