CN102353535A - Low-power-consumption hardware-in-loop test platform and method for stepless speed changer of vehicle - Google Patents
Low-power-consumption hardware-in-loop test platform and method for stepless speed changer of vehicle Download PDFInfo
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- CN102353535A CN102353535A CN2011101835688A CN201110183568A CN102353535A CN 102353535 A CN102353535 A CN 102353535A CN 2011101835688 A CN2011101835688 A CN 2011101835688A CN 201110183568 A CN201110183568 A CN 201110183568A CN 102353535 A CN102353535 A CN 102353535A
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Abstract
The invention discloses a low-power-consumption hardware-in-loop test platform and a low-power-consumption hardware-in-loop test method for a stepless speed changer of a vehicle. The test platform comprises a target machine, a host machine, a data acquisition unit and a hardware unit, wherein the hardware unit comprises a drive motor, the stepless speed changer and a load motor which are connected with one another sequentially; a simulink vehicle transmission model is established in the host machine, and is downloaded to the target machine by using a release to manufacture (RTM) compilation model during operation; the target machine is respectively connected with frequency converters corresponding to the drive motor and the load motor, and makes the drive motor have rotating speed characteristics which are the same as those of an engine and the operation condition of the load motor approach the operation condition of an actual vehicle by setting a simulation coefficient of the vehicle transmission model; and the data acquisition unit is used for acquiring operation data of the stepless speed changer and outputting the data. By stressed balance of a speed changing mechanism of the stepless speed changer, when the properties of a control system and a hydraulic system are researched, a low-power drive motor and a low-power load motor are used for replacing the engine and high-power loading equipment, and the speed changer is operated in a no-load/light-load state, so that the construction cost of the test platform is greatly reduced.
Description
Technical field
The present invention relates to speed transmission test device, be specifically related to a kind of continuously variable transmission of vehicle low-power consumption hardware the-loop test bed.
Background technology
The design object of conventional vehicles buncher testing table is to imitate vehicle actual travel operating mode as far as possible; Testing table is made up of engine, variator, flywheel, loading equipemtn etc.; Wherein engine can be replaced by the suitable motor of power; Flywheel and loading equipemtn can be replaced by the motor that meets the demands; This test platform structure is complicated; Cost is high, and energy consumption is bigger in the operational process.
An at present domestic emphasis to buncher research is control system and hydraulic system; Because the stress balance that the gear self of buncher has relation; The operation conditions of hydraulic system is subjected to the influence of variator load hardly, also can carry out the control of normal Transmission Ratio Control and clamping force in zero load or light duty.
Build and operating cost in order to reduce test, when the efficient of buncher not being studied with the steel band life-span, then need not apply the load identical with actual condition, and as long as guarantee rotating speed and ratio change etc. and truth is approaching all can.Change power source into low-power machine, only need to guarantee that variator can get final product in zero load or light duty operation, loading equipemtn also changes low-power machine into, reduces or cancel mass flywheel simultaneously, thereby greatly reduces the testing table construction cost.
Rapid control prototyping is the trend of present control strategy and control algolithm research; Commercial podium is relatively more expensive; Therefore the xPC target function design vehicle buncher low-power consumption hardware that utilizes MATLAB software the-loop test bed be a kind of considerable cost effective method, and buncher hardware based on zero load/underloading is not arranged at present the-loop test bed.
Summary of the invention
In view of this; One of the object of the invention provides a kind of continuously variable transmission of vehicle low-power consumption hardware the-loop test bed; Utilize the stress balance relation that gear self has in the buncher; When carrying out control system and hydraulic system performance study; Adopt miniwatt drive motor and load motor to replace engine and high-power loading equipemtn, greatly reduce the construction cost of testing table; Two of the object of the invention has provided a kind of continuously variable transmission of vehicle low-power consumption hardware in the ring test method.
The objective of the invention is to realize through following technical scheme:
This continuously variable transmission of vehicle low-power consumption hardware is the-loop test bed, and said testing table comprises target machine, host, data acquisition unit and hardware cell;
Said hardware cell comprises drive motor, buncher and the load motor that connects successively; Set up simulink system of vehicle transmission model in the said host; The simulation parameter of said system of vehicle transmission model is imported through host, during operation, utilizes the RTW compilation model to be downloaded to target machine;
Said target machine through different communication interfaces respectively with drive motor and load motor control linkage; Through setting to the simulation parameter of system of vehicle transmission model; Target machine makes drive motor have the rotary speed property identical with engine, makes the working order of load motor approach the real vehicle operation simultaneously;
Said data acquisition unit is through clamping force and the driven wheel tach signal of the true CVT of sensor acquisition; Input system of vehicle transmission realistic model; Be used to study the control effect of clamping force control algolithm and Transmission Ratio Control algorithm; And being used to calculate the speed of a motor vehicle and engine speed, the gained data are saved to target machine or are uploaded to host.
Further, said control module is realized the rotating speed control to drive motor and load motor through frequency converter I and frequency converter II respectively;
Further, said data acquisition unit comprises capture card and CVT interface board, and said CVT interface board is connected with sensor output terminal on the buncher, and exports the service data of gathering to target machine through capture card;
Further, said simulink system of vehicle transmission model comprises driver, engine, controller, running resistance, vehicle dynamics, motion-control module.
Further, said simulation parameter comprises engine, CVT and road conditions parameter, calculation engine torque, running resistance, speed ratio and system pressure, and further calculate target vehicle speed and target engine speed.
Two of the object of the invention is realized through following technical scheme:
This continuously variable transmission of vehicle low-power consumption hardware may further comprise the steps in the ring test method:
1) drive motor, buncher and load motor are connected successively, form hardware cell;
2) in host, set up simulink system of vehicle transmission model, and the simulation parameter of input system of vehicle transmission model, utilize the RTW compilation model to be downloaded to target machine;
3) operational objective machine program, the hardware cell entry into service, drive motor has the rotary speed property identical with engine, makes the working order of load motor approach the real vehicle operation simultaneously;
4) data acquisition unit is through clamping force and the principal and subordinate wheel tach signal of the true CVT of sensor acquisition; Input system of vehicle transmission realistic model; Be used to study the control effect of clamping force control algolithm and Transmission Ratio Control algorithm; And being used to calculate the speed of a motor vehicle and engine speed, the gained data are saved to target machine or are uploaded to host.
The invention has the beneficial effects as follows:
1. utilize the stress balance relation that gear self has in the buncher; When carrying out control system and hydraulic system performance study; Adopt miniwatt drive motor and load motor to replace engine and high-power loading equipemtn; Variator is in zero load/light condition operation, greatly reduces the construction cost of testing table;
2. for pure model emulation system, the present invention is included in hardware among ring with variator, improves running precision;
3. the present invention adopts the host-target machine structure based on xPC, the real-time of assurance system operation.
4. this system jointly controls variator and motor; Make motor have the rotary speed property identical through the control of conversion device with engine; While control load motor; Make the working order and the real vehicle operation of testing table approaching; Most function with conventional test platform comprises exploitation and access control strategy and control algolithm, is convenient to hydraulic actuating mechanism is carried out performance test and analysis; Realized low energy consumption, low cost.
Other advantages of the present invention, target and characteristic will be set forth in instructions subsequently to a certain extent; And to a certain extent; Based on being conspicuous to those skilled in the art, perhaps can from practice of the present invention, obtain instruction to investigating hereinafter.Target of the present invention and other advantages can realize and obtain through following instructions and claims.
Description of drawings
In order to make the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that the present invention is described in further detail below, wherein:
Fig. 1 is a test platform structure sketch of the present invention;
Fig. 2 is the kinetic model synoptic diagram under clutch coupling of the present invention and the torque converter locking operating mode.
Embodiment
Below will carry out detailed description to the preferred embodiments of the present invention with reference to accompanying drawing.Should be appreciated that preferred embodiment only for the present invention is described, rather than in order to limit protection scope of the present invention.
As shown in Figure 1, continuously variable transmission of vehicle low-power consumption hardware of the present invention comprises host 1, target machine 2, data acquisition unit 3 and hardware cell the-loop test bed;
Hardware cell comprises drive motor 5, buncher 6 and the load motor 7 that connects successively; Through in host 1, setting up simulink system of vehicle transmission model; The simulation parameter of said system of vehicle transmission model is imported through host, during operation, utilizes the RTW compilation model to be downloaded to target machine;
RTW is the tool software of MATLAB, can and be downloaded to target machine automatically with the compiling of simulink model.
XPC is the functional module of simulink, and the hardware that is used to realize a kind of host-target machine formula is at ring structure, wherein; Target machine is the universal PC compatible; On host, set up the simulink model, after the RTW compiling, be downloaded to target machine and real time execution.Target machine is a bare machine, need not operating systems such as windows, and only the model program after the operation compiling has guaranteed travelling speed, therefore can real time execution.
Target machine through different communication interfaces respectively with drive motor and load motor control linkage, simulink system of vehicle transmission model comprises driver, engine, controller, running resistance, vehicle dynamics, motion-control module.Through setting (simulation parameter comprises engine, CVT and road conditions parameter) to the simulation parameter of system of vehicle transmission model, calculation engine torque, running resistance, speed ratio and system pressure, and further calculate target vehicle speed and target engine speed.
Target machine makes drive motor have the rotary speed property identical with engine, makes the working order of load motor approach the real vehicle operation simultaneously; In the present embodiment, control module is realized the rotating speed control to drive motor and load motor through frequency converter I 8 and frequency converter II 9 respectively.
Said data acquisition unit is through the service data of sensor acquisition buncher, and output data is saved to target machine or is uploaded to host.In the present embodiment, data acquisition unit comprises capture card and CVT interface board 4, and CVT interface board 4 is connected with sensor output terminal on the buncher, and exports the service data of gathering to target machine through capture card.
Simulink is a kind of visual simulating instrument among the MATLAB; It is a kind of block diagram design environment based on MATLAB; Be a software package realizing dynamic system modeling, emulation and analysis, be widely used in the modeling and simulation of linear system, nonlinear system, digital control and digital signal processing.Simulink can carry out modeling with the sampling time of continuous sampling time, discrete sampling time or two kinds of mixing, and it also supports multirate system, and just the different piece in the system has different sampling rates.In order to create dynamic system model; Simulink provides a graphical user interface (GUI) of setting up the model calcspar; This constructive process only need be clicked and drag mouse action and just can accomplish; It provides a kind of faster, straightforward mode, and the user can see the simulation result of system immediately.
With the pure realistic model that on PC, moves fully relatively, continuously variable transmission of vehicle low-power consumption hardware of the present invention has a following characteristic the-loop test bed:
1) with actual CVT replaced C VT model, its simulated effect and pure software environmental facies ratio more approach truth;
2) motion-control module is according to kinematic train dynamics; The target engine speed that calculates and the speed of a motor vehicle; The moving control module for controlling frequency converter makes drive motor and the load motor rotating-speed tracking target engine speed and the speed of a motor vehicle, and the service performance and the actual vehicle of testing table are close;
3) the CVT interface board is the conversion of signals interface of CVT and capture card, converts the sensor signal on the CVT to signal that capture card can be gathered, and the control signal according to capture card output drives solenoid valve simultaneously.Solenoid valve comprises clamping force valve relevant with gear and speed ratio valve; Wherein the clamping force valve is used to control the clamping force of engaged wheel; The speed ratio valve is used to control the clamping force of driving wheel; Driving wheel and engaged wheel all are made up of shaft collar and slider disc; Regulate the clamping force ratio of principal and subordinate wheel through controlling two valves; Change the radius of clean-up of driving wheel and engaged wheel, thereby realize that speed ratio continuously changes.
Based on above testing table, continuously variable transmission of vehicle low-power consumption hardware of the present invention may further comprise the steps in the ring test method:
1) drive motor, buncher and load motor are connected successively, form hardware cell;
2) in host, set up simulink system of vehicle transmission model, and the simulation parameter of input system of vehicle transmission model, utilize the RTW compilation model to be downloaded to target machine;
3) operational objective machine program, the hardware cell entry into service, drive motor has the rotary speed property identical with engine, makes the working order of load motor approach the real vehicle operation simultaneously;
4) process of the test is monitored, and saved the data in target machine or be uploaded to host;
5) after trial run finishes, test figure is handled.
As shown in Figure 2, clutch coupling and the torque converter kinetic model under the locking operating mode is:
In the formula, speed ratio i obtains through acquisition test platform variator I/O axle revolution speed calculating.
CVT modal a kind of structure at present is: engine-clutch coupling-torque converter-gear-master's deceleration-wheel.Because Clutch Control and torque converter control are current techiques; It is not the distinctive technology of CVT; Therefore not the emphasis of CVT research; Usually the Control Study of CVT is mainly concentrated on the research of clutch coupling closure and torque converter locking state; The control content of this moment comprises Transmission Ratio Control and clamping force control, is the distinctive control content of CVT.
Dynamics simulation obtains engine speed and the speed of a motor vehicle respectively as the rotating speed of target of testing table drive motor and load motor.Because the stress balance of CVT self relation; Ratio change rate and control characteristic are only relevant with rotating speed, and be irrelevant with the moment of torsion that transmits, as long as therefore make the drive motor rotary speed property identical with engine speed; The load motor rotating speed is identical with the driving wheel rotating speed, just can reflect the speed ratio characteristic of CVT exactly.
Obtain the engine speed and the speed of a motor vehicle through above-mentioned equation emulation, through the engine speed that frequency converter calculates the drive motor rotating-speed tracking, regulating load motor speed, the vehicle wheel rotational speed that the tracking target speed of a motor vehicle is corresponding.This moment, CVT just was operated under the engine speed and the speed of a motor vehicle identical with actual condition.
Explanation is at last; Above embodiment is only unrestricted in order to technical scheme of the present invention to be described; Although the present invention is described in detail with reference to preferred embodiment; Those of ordinary skill in the art is to be understood that; Can make amendment or be equal to replacement technical scheme of the present invention; And not breaking away from the aim and the scope of present technique scheme, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (6)
1. continuously variable transmission of vehicle low-power consumption hardware is characterized in that the-loop test bed: said testing table comprises target machine, host, data acquisition unit and hardware cell;
Said hardware cell comprises drive motor, buncher and the load motor that connects successively; Set up simulink system of vehicle transmission model in the said host; The simulation parameter of said system of vehicle transmission model is imported through host, during operation, utilizes the RTW compilation model to be downloaded to target machine;
Said target machine through different communication interfaces respectively with drive motor and load motor control linkage; Through setting to the simulation parameter of system of vehicle transmission model; Target machine makes drive motor have the rotary speed property identical with engine, makes the working order of load motor approach the real vehicle operation simultaneously;
Said data acquisition unit is through clamping force and the driven wheel tach signal of the true CVT of sensor acquisition; Input system of vehicle transmission realistic model; Be used to study the control effect of clamping force control algolithm and Transmission Ratio Control algorithm; And being used to calculate the speed of a motor vehicle and engine speed, the gained data are saved to target machine or are uploaded to host.
2. continuously variable transmission of vehicle low-power consumption hardware according to claim 1 is characterized in that the-loop test bed: said control module is realized the rotating speed control to drive motor and load motor through frequency converter I and frequency converter II respectively.
3. continuously variable transmission of vehicle low-power consumption hardware according to claim 1 is the-loop test bed; It is characterized in that: said data acquisition unit comprises capture card and CVT interface board; Said CVT interface board is connected with sensor output terminal on the buncher, and exports the service data of gathering to target machine through capture card.
According to claim 1 or 2 or 3 described continuously variable transmission of vehicle low-power consumption hardware the-loop test bed, it is characterized in that: said simulink system of vehicle transmission model comprises driver, engine, controller, running resistance, vehicle dynamics, motion-control module.
5. continuously variable transmission of vehicle low-power consumption hardware according to claim 4 is the-loop test bed; It is characterized in that: the simulation parameter of simulink system of vehicle transmission model comprises engine, CVT and road conditions parameter; Be used for calculation engine torque, running resistance, speed ratio and system pressure, and further calculate target vehicle speed and target engine speed.
6. continuously variable transmission of vehicle low-power consumption hardware is characterized in that in the ring test method: may further comprise the steps:
1) drive motor, buncher and load motor are connected successively, form hardware cell;
2) in host, set up simulink system of vehicle transmission model, and the simulation parameter of input system of vehicle transmission model, utilize the RTW compilation model to be downloaded to target machine;
3) operational objective machine program, the hardware cell entry into service, drive motor has the rotary speed property identical with engine, makes the working order of load motor approach the real vehicle operation simultaneously;
4) data acquisition unit is through clamping force and the driven wheel tach signal of the true CVT of sensor acquisition; Input system of vehicle transmission realistic model; Be used to study the control effect of clamping force control algolithm and Transmission Ratio Control algorithm; And being used to calculate the speed of a motor vehicle and engine speed, the gained data are saved to target machine or are uploaded to host.
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| CN 201110183568 CN102353535B (en) | 2011-07-01 | 2011-07-01 | Low-power-consumption hardware-in-loop test platform and method for stepless speed changer of vehicle |
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| CN 201110183568 CN102353535B (en) | 2011-07-01 | 2011-07-01 | Low-power-consumption hardware-in-loop test platform and method for stepless speed changer of vehicle |
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| CN102323055A (en) * | 2011-07-01 | 2012-01-18 | 重庆大学 | Continuously variable transmission of vehicle gearshift performance testing table and test method |
| CN103092082A (en) * | 2013-01-07 | 2013-05-08 | 河南科技大学 | Driver-in-the-loop vehicle performance optimizing simulation testing system |
| CN103776630A (en) * | 2014-02-13 | 2014-05-07 | 湘潭大学 | Metal band type stepless transmission sliding rate test platform |
| CN104655434A (en) * | 2015-02-10 | 2015-05-27 | 中国计量学院 | In-loop testing experiment method of automobile brake hardware |
| CN110068463A (en) * | 2019-03-26 | 2019-07-30 | 中国汽车技术研究中心有限公司 | A kind of separation collaboration test method and system for automobile power assembly |
| CN110243593A (en) * | 2019-06-11 | 2019-09-17 | 中国第一汽车股份有限公司 | Automatic transmission half hitch chalaza test method, system, equipment and storage medium |
| CN113702028A (en) * | 2021-07-14 | 2021-11-26 | 柏科（常熟）电机有限公司 | Real and virtual combined full-automatic gearbox testing system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323055A (en) * | 2011-07-01 | 2012-01-18 | 重庆大学 | Continuously variable transmission of vehicle gearshift performance testing table and test method |
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| CN103776630A (en) * | 2014-02-13 | 2014-05-07 | 湘潭大学 | Metal band type stepless transmission sliding rate test platform |
| CN103776630B (en) * | 2014-02-13 | 2016-06-15 | 湘潭大学 | Metal band type stepless speed variator slip rate testboard |
| CN104655434A (en) * | 2015-02-10 | 2015-05-27 | 中国计量学院 | In-loop testing experiment method of automobile brake hardware |
| CN110068463A (en) * | 2019-03-26 | 2019-07-30 | 中国汽车技术研究中心有限公司 | A kind of separation collaboration test method and system for automobile power assembly |
| CN110068463B (en) * | 2019-03-26 | 2021-05-28 | 中国汽车技术研究中心有限公司 | Separation cooperative test method and system for automobile power assembly |
| CN110243593A (en) * | 2019-06-11 | 2019-09-17 | 中国第一汽车股份有限公司 | Automatic transmission half hitch chalaza test method, system, equipment and storage medium |
| CN113702028A (en) * | 2021-07-14 | 2021-11-26 | 柏科（常熟）电机有限公司 | Real and virtual combined full-automatic gearbox testing system and method |
| CN113702028B (en) * | 2021-07-14 | 2024-05-10 | 柏科（常熟）电机有限公司 | Real and virtual combined full-automatic gearbox testing system and method |
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