CN105717805B - A kind of exploitation of automatic mechanical type gearbox control and test platform - Google Patents
A kind of exploitation of automatic mechanical type gearbox control and test platform Download PDFInfo
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- CN105717805B CN105717805B CN201610262435.2A CN201610262435A CN105717805B CN 105717805 B CN105717805 B CN 105717805B CN 201610262435 A CN201610262435 A CN 201610262435A CN 105717805 B CN105717805 B CN 105717805B
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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
- G05B17/00—Systems involving the use of models or simulators of said systems
- G05B17/02—Systems involving the use of models or simulators of said systems electric
Abstract
Exploitation and test platform the invention discloses a kind of automatic mechanical type gearbox control, including battery (1), gearbox control (2), automatic mechanical type gearbox (3), accelerator pedal (4), vehicle emulator (5), CAN data collecting cards (6) and host computer (7).Battery is powered for TCU and VSU.AMT controls object as the real of TCU, including selects gear shifting motor, gear-selecting and shifting executing mechanism, selects gear shift angular displacement sensor and gearbox body.It is vehicle emulator 5 (VSU), gearbox AMT and TCU to be tested in ring hardware.The present invention is few in ring component, and analogue system is simple, and debugging is convenient.
Description
Technical field
The present invention relates to the exploitation measuring technology of automatic gearbox of vehicles controller, more particularly to a kind of automatic mechanical type becomes
The exploitation of fast case controller and test platform.
Background technology
The exploitation of automatic speed-changing system relates generally to two big parts, one be including the gearbox including actuator, secondly
It is gearbox control (Transmission Control Unit, TCU).Automatic mechanical transmission (Automatic
Manual Transmission, AMT) it is to increase certainly on the basis of manual transmission (Manual Transmission, MT)
Dynamic shift-selecting and changing actuating mechanism is with instead of original manual shift actuating element.Therefore AMT has MT and automatic gear-box concurrently
The advantage of (Automatic Transmission, AT), i.e., transmission efficiency higher, relatively low fuel consumption, relative moderate
Manufacturing cost, be able to the shift quality of the driver's manipulation strength and lifting for slowing down.At present, the research process of AMT is just located
In comprehensively to the stage of intelligent transition.According to the difference of executing agency, AMT can be divided three classes：Electromechanical, electropneumatic and
Electric hydraulic.Instantly, using direct current generator as the AMT of driving source in manufacturing cost, reliability has huge excellent in controllability
Gesture, therefore enjoy favor.
TCU is the important component of AMT, including hardware and software, be by machinery, electronics and control integration it is important
Carrier；Extremely important effect is played at aspects such as automobile automatic gear, smooth rides.However, the exploitation of TCU need to be carried out greatly
Measure examination.In early days, due to the imperfection of control logic, parts damages, therefore real train test optimal selection absolutely not are easily caused.For
The exploitation of automobile electronic controller, it is main using hardware in loop (Hardware in the Loop, HIL) and vapour in the market
Two methods of car Development of ECU for Compressed platform.Hardware in loop is that some are difficult into the part that emulates with physical form in ring, other
Part, in ring, carries out closed loop test together with model.Hardware in loop still needs to material object alleviating working strength to a certain degree
Complicated machinery is connected and is electrically connected.Particularly when stand configuration, when part installs unreasonable, quadratic programming will be caused, it is time-consuming
Arduously.Automobile electronic control unit development platform realizes automatically generating from full model to embedded code and runs, although significantly
Development process is simplified, but its is expensive, and need just can skillfully be used by the training of specialty.
Chinese invention patent CN101968630A discloses a kind of automatic gear-box controller using the method for hardware in loop
Simulation test stand.Including a host, a real-time target machine, a signal occur with measurement part, an engine electronic control,
Multiple magnetic valves.By engine, gearbox, Full Vehicle Dynamics Modeling, and gearbox control and engine electronic control are
Material object constitutes emulation platform together.Chinese invention patent CN102354121A uses automobile electronic control unit development platform, discloses
A kind of method used in rapid prototype development and its development platform.Control strategy model is set up and can be downloaded in host computer
To in the processor of MicroAutobox.By the Signal-regulated kinase of hardware unit, needed from processor acquisition control strategy
Various sensors, switching signal；Peripheral real controllers are driven by the power driver module of hardware unit, makes equipment normal
Operation.
TCU has two big main tasks, and one is to carry out direct torque instead of engine management unit during gear shift, and two is right
Gearbox carries out selecting gearshift control.It is not related to the stability problem of vehicle substantially therebetween, therefore in the hardware-in-loop simulation to TCU
In, automotive system model can simplify, influence and Steering without considering suspension.According to this feature, the present invention based on
AMT, it is proposed that a kind of TCU based on embedded system is quickly developed and test platform.
The content of the invention
Regarding to the issue above, the present invention is directed to propose a kind of low cost, easily realizes, simple structure can fast verification speed change
The exploitation of case controller and test platform.In early stage, instead of real train test and bench test, verify TCU hardware reliability and
The correctness of control strategy.
In order to realize above-mentioned technical purpose, the present invention is adopted the following technical scheme that：
A kind of exploitation of automatic mechanical type gearbox control and test platform, including battery, gearbox control, from
Dynamic mechanical gearbox, accelerator pedal, vehicle emulator, CAN data collecting cards and host computer, it is characterised in that：
Battery is electrically connected with gearbox control and vehicle emulator respectively；Gearbox control and vehicle emulator
In be all provided with power transfer module, 12V direct currents can be changed into 5V, gearbox control is electrically connected with accelerator pedal, whole
Car emulator is electrically connected with automatic mechanical type gearbox；Gearbox control and vehicle emulator (5) are all provided with CAN module,
Both are connected by CAN；Host computer is connected by CAN data collecting cards (6) with CAN, realizes the collection of data.
Developed with test platform present invention also offers a kind of exploitation of utilization automatic mechanical type gearbox control
Method, it includes：
Step 1, when power on signal is detected, TCU orders AMT makes the return trip empty shelves, while detecting parking braking and door switch letter
Number, the indicator lamp flicker if parking brake signals are 1, indicator lamp flashes and start signal is invalid if door switch signal is 1,
Driver needs closed door and puts down parking brake；
Step 2, table look-up and can obtain motor torque according to accelerator pedal position and engine speed two dimension, if more than starting
Machine torque capacity, engine effective torque takes torque capacity, otherwise takes torque of tabling look-up；
If step 3, current gear are 0 or clutch is in released state, the race of engine, speed is 0；If in shelves
And clutch engagement then calculates vehicle acceleration according to power train ideal model, and then accumulation obtains speed；
Step 4, TCU gather speed, accelerator pedal position, clutch state signal from CAN network, and using they as
Make a decision the condition of gear shift, while gear shift speed is calculated by upper strata shift control strategy, if current vehicle speed is not equal to gear shift speed,
Continue waiting for；If current vehicle speed is equal to gear shift speed, TCU provides target gear and sends request signal control of going beyond one's commission and starts
Machine；
Step 5, order clutch separation, TCU bottom control programs provide expectation gear selection position and shift pattern, use
PWM controls select gear shifting motor to act successively；Selecting gear shift angular position pick up will select the gear shift current location to carry out reality in feeding back to TCU
Shi Jiaozheng；
Step 6, the interaction of the CAN signal of whole service process are passed in PC by CAN data collecting cards (6), whole mistake
Journey is monitored by Labview, if gear shift is not completed, data analysis its reason collected by Labview is changed upper strata
Shelves control strategy and bottom motor control program are modified；Current gear is delivered in CAN network if gear shift is completed, it is whole
Car state is updated；
, so as to change the present road gradient, change accelerator pedal position can change starts for step 7, the position of change potentiometer
The operating point of machine, changing combination button can determine vehicle operation in drive shift or reverse gear
Quick exploitation of the invention, due to taking above technical scheme, compared with existing test platform, has with test platform
Have the advantage that：
1st, it is vehicle emulator 5 (VSU), gearbox AMT and TCU to be tested in ring hardware.It is few in ring component, emulation system
System is simple, and debugging is convenient.
2nd, the input of vehicle operating parameters such as accelerator pedal position, brake pedal position, gradient etc. can be by various switches
Or potentiometer is realized, and can be indicated by LED if travel condition of vehicle such as speed, engine speed.With low cost,
Easily realize.
3rd, engine, vehicle transmission system and clutch are pressed into ideal mathematics model to be realized in the form of embedded type C code
And be embedded into vehicle emulator 5 (VSU), for TCU to be tested provides vehicle environment.Simple general-purpose, can be widely applied to automobile
In electronic controller quick development platform.
4th, host computer builds data acquisition and system for tracking using Labview, can be by the data in emulation graphically
Show and preserve in real time.Because simulation process and data display remain synchronous, it is convenient to which TCU gearshift control logics are entered
Row analysis and improvement.
Brief description of the drawings
Fig. 1 is TCU exploitations and test platform general frame figure；
Fig. 2 is TCU exploitations and test platform control logic flow chart；
Fig. 3 is Labview machine Interaction Interface Design flow charts.
Wherein：1- batteries, 2- gearbox controls, 3- automatic mechanical types gearbox, 4- accelerator pedals, the emulation of 5- vehicles
Device 5,6-CAN data collecting cards, 7- host computers.
Specific embodiment：
Below in conjunction with accompanying drawing, the present invention is described in detail：
Fig. 1 is TCU quickly exploitation and test platform general frame figure.Including battery 1, gearbox control 2 (TCU),
Automatic mechanical type gearbox 3 (AMT), accelerator pedal 4, vehicle emulator 5 (VSU), CAN data collecting cards 6 and host computer 7.
Wherein, battery 1 is electrically connected with gearbox control 2 (TCU) and vehicle emulator 5 (VSU) respectively；Gearbox
Power transfer module is all provided with controller 2 and vehicle emulator 5 (VSU), 12V direct currents can be changed into 5V, gearbox control
Device processed 2 is electrically connected with accelerator pedal 4, and vehicle emulator 5 (VSU) is electrically connected with automatic mechanical type gearbox 3 (AMT)；Become
Fast case controller 2 and vehicle emulator 5 (VSU) are all provided with CAN module, and both are connected by CAN；Host computer 7 passes through CAN
Data collecting card 6 is connected with CAN, realizes the collection of data；
The battery 1 is vehicle-mounted 12V batteries, is gearbox control to be tested 2, vehicle emulator 5 (VSU) and choosing
Gear shifting motor is powered；
The voltage of the battery 1 is gathered by vehicle emulator 5 (VSU), can the working condition of real-time monitoring battery 1；
The gearbox control 2 (TCU) is divided into hardware and software two parts.Hardware circuit be provided with power transfer module,
Signal processing module, MPU modules, on-line debugging module, motor drive module, current of electric detection module and CAN module.
Software is divided into upper strata shift control strategy and bottom motor control；
Be changed into for the 12V direct currents of battery by the power transfer module of the gearbox control 2 (TCU) hardware circuit
5V direct currents are other modules in controller and select gear shift angular displacement sensor to power；
The signal processing module of the gearbox control 2 (TCU) hardware circuit includes the twitter circuit that disappears, the mould of switching signal
Intend the single order RC filter circuits of signal and the hysteresis voltage comparator circuit of tach signal, for eliminating the hair in signal with different type
Thorn and shake；
The MPU modules of the gearbox control 2 (TCU) hardware circuit use Infineon's XC2000 series monolithics, bag
Include energization pins filter circuit, reset circuit and external crystal oscillation circuit；
The on-line debugging module of the gearbox control 2 (TCU) hardware circuit is utilized can be with the dedicated emulated device of Infineon
It is connected, enters the burning of line program and the online observation of variable and debugging；
The motor drive module of the gearbox control 2 (TCU) hardware circuit mainly include motor drive ic and by
The H bridges of MOSFET compositions, are directly connected by connector with step electric machine with gear shifting motor；
The gearbox control 2 (TCU) hardware circuit is provided with two-way current of electric detection module, by 5 milliohm resistance and
Current detecting chip is constituted.5 milliohm resistance and motor are connected, and current detecting chip gathers the both end voltage of 5 milliohm resistance, by Europe
Nurse law can flow through the electric current of step electric machine and gear shifting motor；
(TCU) hardware circuit of the gearbox control 2 CAN module mainly includes CAN driving chips, using CAN module
Send step electric machine position, gear shifting motor position, step electric machine electric current, gear shifting motor electric current and current gear signal；
The gearbox control 2 (TCU) need detection TCU under different operating modes, hardware circuit during buty shifting, especially
It is the reliability of motor drive module and the correctness and ride comfort of software shift control strategy；
The accelerator pedal 4 is unique real vehicle signal generation device in platform.Because potentiometer lacks self-return work(
Can, and the position of accelerator pedal 4 is to determine that engine power output and TCU perform the signal of interest of gear shift, hence speeds up pedal 4
Using real vehicle device；
The accelerator pedal 4 is provided with displacement transducer, can simultaneously produce the position signalling of two-way accelerator pedal 4, two paths of signals
Can mutually verify.The position signalling of the accelerator pedal 4 is gathered by vehicle emulator 5 (VSU)；
The automatic mechanical type gearbox 3 (AMT) has five gears, is changed for gearbox control TCU to be tested is provided
Shelves during time-varying load force and select gear shifting motor electric current.Automatic mechanical type gearbox 3 comprising step electric machine, gear shifting motor,
Gear selecting angular displacement sensor, gear shift angular displacement sensor, gear selecting executing agency and gear-shifting actuating mechanism；
The AMT step electric machines are slowed down to increase by worm couple and turned round, then the rotation fortune for passing through rack-and-pinion adjutant's motor
It is dynamic to be changed into moving up and down, so as to carry out gear selecting operation；
The AMT gear shifting motors slow down to increase again by worm couple and turn round, then move shifting by one-stage gear subband
Control stick side-to-side movement, realizes gear shift；
The AMT selects gear shift angular displacement sensor for indicating the position of current gear selecting and selector fork；
The vehicle emulator 5 (VSU) provides vehicle environment for the exploitation of TCU.It is divided into hardware and software two parts, hardware
Circuit include power transfer module, signal generating module, signal processing module, MCU module, on-line debugging module, CAN module and
Alarm module.Software is divided into bottom layer driving and top level control two parts；
12V direct currents are transformed into 5V direct currents by (VSU) power transfer module of vehicle emulator 5；
Vehicle emulator 5 (VSU) signal generating module includes ship type switch, potentiometer and combination button switch.Ship
Type is switched for producing switching value, such as power on signal；Potentiometer is used to produce analog signal, such as brake pedal position signal；Group
Closing key switch is used to simulate multi-breal switch amount, such as range seletor position；
What vehicle emulator 5 (VSU) signal processing module included switching signal disappears the one of twitter circuit and analog signal
Rank RC filter circuits, for removing burr and shake in signal；
The CAN module of the vehicle emulator 5 (VSU) is provided with CAN driving chips, logical by CAN and CAN network
Letter.Need to send electricity, current acceleration, current vehicle speed, the position of accelerator pedal 4 and clutch state signal；
Vehicle emulator 5 (VSU) alarm module is provided with light emitting diode and buzzer.When car door opening, parking system
Fixed handle will give a warning when not putting down, selecting gear shifting motor excessive；
Vehicle emulator 5 (VSU) software is first by vehicle and environment, engine, clutch and motor
Mathematical modeling is carried out by comparatively ideal characteristic and converts the result to C code being embedded into single-chip microcomputer；Bsp driver is gathered
And process the signal from signal generating module；Top level control program calculates the whole-car parameterses such as speed, acceleration；
Described one end of CAN data collecting cards 6 connects CAN network, and one end connects the USB interface of host computer 7, realizes data
Transmission and the conversion of type；
Host computer 7PC operation has Labview programs, it is possible to provide clearly human-computer interaction interface；Run in platform
Cheng Zhong, Real-time Collection simultaneously parses step electric machine electric current, gear shifting motor electric current, step electric machine position, gear shifting motor position, current shelves
Position and GES, and result is graphically shown and preserved.
To further illustrate information exchange of the invention, list below is to specific in the quick exploitations of TCU and test platform
Signal stream is illustrated：
Referring to table 1, TCU is quickly developed and test platform signal stream, including in ring hardware, signal name, realization side
Formula and concrete signal type.
The TCU of table 1 is quickly developed and test platform signal stream
The upper electricity, parking braking, door switch and range seletor position are switching signal, can be switched and group by ship type respectively
Combination switch is simulated.When the corresponding universal input and output port of single-chip microcomputer detects high level to be input into, will trigger corresponding
Control function is realizing on vehicle the specific functions such as electricity, vehicle braking, the pressurization of wheel wheel cylinder and change gear；
The start signal is step signal, and high level is sustainable, therefore can be realized using reducible key switch；
The brake pedal position signal and grade signal are analog signal.Potentiometer can realize the continuous change of 0-5V level
Change, therefore can be used to simulating brake pedal and road grade；
Though the accelerator pedal position is similar to brake pedal, potentiometer lacks self-return function, and acceleration is stepped on
Board position signal directly affects shift strategy, of crucial importance, therefore uses real vehicle accelerator pedal；
The battery tension is 12V, and the requirement of single-chip microcomputer input voltage is 5V, therefore needs to set partial pressure on path
Circuit；Nearly source side resistance resistance at least should be 1.4 times of near end resistance, so that the voltage for being input to single-chip microcomputer is to the maximum
5V；
The current detection module for selecting gear shifting motor electric current to result from TCU hardware circuits.The module by 5 milliohm resistance and
Current detecting chip is constituted.5 milliohm resistance and motor are connected, and the both end voltage of current detecting chip 5 milliohm resistance of collection simultaneously will
It amplifies 20 times, and the electric current of step electric machine and gear shifting motor can be flowed through by Ohm's law；
The gear selecting and shift pattern result from the angular displacement sensor on AMT.The angular displacement sensor rated voltage is
5V, is powered by TCU；
The TCU quickly realize interacting by CAN with the signal in test platform by exploitation.
To further illustrate the implementation method of patent of the present invention, automatic mechanical type gearbox control will be in detail utilized with reference to Fig. 2
The method that the exploitation of device processed is developed with test platform.
Step 1, when power on signal is detected, TCU orders AMT makes the return trip empty shelves, while detecting parking braking and door switch letter
Number, the indicator lamp flicker if parking brake signals are 1, indicator lamp flashes and start signal is invalid if door switch signal is 1,
Driver needs closed door and puts down parking brake；
Step 2, table look-up and can obtain motor torque according to accelerator pedal position and engine speed two dimension, if more than starting
Machine torque capacity, engine effective torque takes torque capacity, otherwise takes torque of tabling look-up；
If step 3, current gear are 0 or clutch is in released state, the race of engine, speed is 0；If in shelves
And clutch engagement then calculates vehicle acceleration according to power train ideal model, and then accumulation obtains speed；
Step 4, TCU gather speed, accelerator pedal position, clutch state signal from CAN network, and using they as
Make a decision the condition of gear shift, while gear shift speed is calculated by upper strata shift control strategy, if current vehicle speed is not equal to gear shift speed,
Continue waiting for；If current vehicle speed is equal to gear shift speed, TCU provides target gear and sends request signal control of going beyond one's commission and starts
Machine；
Step 5, order clutch separation, TCU bottom control programs provide expectation gear selection position and shift pattern, use
PWM controls select gear shifting motor to act successively；Selecting gear shift angular position pick up will select the gear shift current location to carry out reality in feeding back to TCU
Shi Jiaozheng；
Step 6, the interaction of the CAN signal of whole service process are passed in PC by CAN data collecting cards 6, whole process
It is monitored by Labview, if gear shift is not completed, data analysis its reason collected by Labview, to upper strata gear shift
Control strategy and bottom motor control program are modified；Current gear is delivered in CAN network if gear shift is completed, vehicle
State is updated；
, so as to change the present road gradient, change accelerator pedal position can change starts for step 7, the position of change potentiometer
The operating point of machine, changing combination button can determine vehicle operation in drive shift or reverse gear.Said process is repeated, VSU is just obtained
New input state, realizes checking of the TCU control logics under multi-state.
To further illustrate the implementation method of patent of the present invention, the design flow diagram of Fig. 3 explanations Labview will be combined:
Referring to Fig. 3, VSU and TCU by the signal transmission that gathers and be calculated in CAN, adopted by CAN data
Truck 6 passes in PC CAN signal.The CAN protocol of engine, clutch and whole vehicle model is defined on the CAN module of VSU
In, select gear shifting motor current location and select the CAN protocol of gear shifting motor electric current to be defined in the CAN module of TCU.Labview roots
CAN signal is parsed according to CAN protocol, and is shown to graphically.Realize the real-time tracking of test platform signal stream.
Although refer to the attached drawing discloses the present invention in detail, it will be appreciated that, what these descriptions were merely exemplary, not
For limiting application of the invention.Protection scope of the present invention may include do not departing from this hair by appended claims
Various modifications, remodeling and the equivalents made for invention in the case of bright protection domain and spirit.
Claims (4)
1. a kind of exploitation of automatic mechanical type gearbox control and test platform, including battery (1), gearbox control
(2), automatic mechanical type gearbox (3), accelerator pedal (4), vehicle emulator (5), CAN data collecting cards (6) and host computer
(7), it is characterised in that：
Battery (1) is electrically connected with gearbox control (2) and vehicle emulator (5) respectively；Gearbox control (2) and whole
Car emulator is all provided with power transfer module in (5), 12V direct currents can be changed into 5V, and gearbox control (2) is stepped on acceleration
Plate (4) is electrically connected, and vehicle emulator (5) is electrically connected with automatic mechanical type gearbox (3)；Gearbox control (2) and whole
Car emulator (5) is all provided with CAN module, and both are connected by CAN；Host computer (7) by CAN data collecting cards (6) and
CAN is connected, and realizes the collection of data；
The vehicle emulator (5) provides vehicle environment for the exploitation of TCU, and its hardware circuit includes vehicle emulator Power convert
Module, vehicle emulator signal generating module, vehicle emulator signal processing module, vehicle emulator MCU module, vehicle emulation
Device on-line debugging module, vehicle emulator CAN module and alarm module；
12V direct currents are transformed into 5V direct currents by vehicle emulator power transfer module；
Vehicle emulator (5) signal generating module includes ship type switch, potentiometer and combination button switch, and ship type is switched for producing
Raw switching value, potentiometer is used to produce analog signal, and combination button is switched for simulating multi-breal switch amount；
Vehicle emulator (5) signal processing module includes the single order RC filtering of disappear twitter circuit and the analog signal of switching signal
Circuit, for removing burr and shake in signal；
The CAN module of the vehicle emulator (5) is provided with CAN driving chips, and communication is realized by CAN and CAN network；
Vehicle emulator (5) alarm module is provided with light emitting diode and buzzer；When car door opening, parking brake handle grip not
Given a warning when putting down, selecting gear shifting motor electric current excessive；
CAN data collecting cards one end connects CAN network, and one end is connected with host computer (7), realizes the transmission of data and turning for type
Change；
Host computer (7) operation has Labview programs, and Real-time Collection simultaneously parses step electric machine electric current, gear shifting motor electric current, choosing
Shelves motor position, gear shifting motor position, current gear and GES, and result is graphically shown and preserved.
2. the exploitation of automatic mechanical type gearbox control according to claim 1 and test platform, it is characterised in that：Institute
It is vehicle-mounted 12V batteries to state battery (1), is gearbox control to be tested (2), vehicle emulator (5) and selects gear shifting motor
Power supply；Battery (1) voltage is gathered by vehicle emulator (5), can real-time monitoring battery (1) working condition.
3. the exploitation of automatic mechanical type gearbox control according to claim 1 and test platform, it is characterised in that：Plus
Speed pedal (4) is the real vehicle signal generation device of the exploitation with test platform of automatic mechanical type gearbox control, by accelerating
Pedal (4) position determines that engine power output and TCU perform gear shift；The accelerator pedal (4) is provided with displacement transducer, described
Accelerator pedal (4) position signalling is gathered by vehicle emulator (5).
4. the side that the exploitation of automatic mechanical type gearbox control according to claim 1 is developed with test platform
Method, it is characterised in that comprise the following steps：
Step 1, when power on signal is detected, TCU orders AMT makes the return trip empty shelves, while detect parking braking and door switch signal, if
Parking brake signals are 1 indicator lamp flicker, and indicator lamp flashes and start signal is invalid if door switch signal is 1, drives
Member needs closed door and puts down parking brake；
Step 2, table look-up and can obtain motor torque according to accelerator pedal position and engine speed two dimension, if more than engine most
Big torque, engine effective torque takes torque capacity, otherwise takes torque of tabling look-up；
If step 3, current gear are 0 or clutch is in released state, the race of engine, speed is 0；If shelves and from
Clutch engagement then calculates vehicle acceleration according to power train ideal model, and then accumulation obtains speed；
Step 4, TCU gather speed, accelerator pedal position, clutch state signal from CAN network, and using them as resolution
The condition of gear shift, while calculating gear shift speed by upper strata shift control strategy, if current vehicle speed is not equal to gear shift speed, continues
Wait；If current vehicle speed is equal to gear shift speed, TCU provides target gear and sends request signal control engine of going beyond one's commission；
Step 5, order clutch separation, TCU bottom control programs provide expectation gear selection position and shift pattern, are controlled using PWM
System selects gear shifting motor to act successively；Selecting gear shift angular position pick up will select the gear shift current location to carry out real-time school in feeding back to TCU
Just；
Step 6, the interaction of the CAN signal of whole service process are passed in PC by CAN data collecting cards (6), and whole process is led to
Labview is crossed to be monitored, if gear shift is not completed, data analysis its reason collected by Labview, to upper strata gear shift control
System strategy and bottom motor control program are modified；Current gear is delivered in CAN network if gear shift is completed, vehicle shape
State is updated；
, so as to change the present road gradient, changing accelerator pedal position can change engine for step 7, the position of change potentiometer
Operating point, changing combination button can determine vehicle operation in drive shift or reverse gear.
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| CN113738522B (en) * | 2021-08-31 | 2023-12-22 | 东风商用车有限公司 | Testing device and method for engine starting neutral protection |
| CN113609710B (en) * | 2021-09-09 | 2024-02-27 | 安徽江淮汽车集团股份有限公司 | Power simulation method, power chassis simulation system and vehicle body domain test system |
| CN114397868A (en) * | 2021-12-03 | 2022-04-26 | 陕西法士特齿轮有限责任公司 | Hardware-in-loop test platform and test method for integrated automatic mechanical gearbox |
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| CN201829070U (en) * | 2010-10-20 | 2011-05-11 | 合肥工业大学 | Hardware-in-the-loop simulating experiment platform for automatic transmission |
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