CN105717805A - Development and testing platform of automatic mechanical transmission control unit - Google Patents
Development and testing platform of automatic mechanical transmission control unit Download PDFInfo
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- 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
The invention discloses a development and testing platform of an automatic mechanical transmission control unit. The development and testing platform comprises a storage battery (1), a transmission control unit (2), an automatic mechanical transmission (3), an accelerator pedal (4), a vehicle simulation unit (5), a CAN (Controller Area Network) data acquisition card (6) and an upper computer (7), wherein the storage battery supplies power to the TCU (Transmission Control Unit) and the VSU (Vehicle Simulation Unit). As an actual control object of the TCU, the AMT (Automatic Mechanical Transmission) comprises an electing and shifting motor, an electing and shifting execution mechanism, an electing and shifting angular displacement sensor and a transmission body. Hardware in the loop comprises the vehicle simulation unit 5 (VSU), the transmission AMT and the TCU to be tested. The development and testing platform disclosed by the invention has the advantages that the parts in the loop are fewer, the simulation system is simple and the debugging is convenient.
Description
Technical field
The present invention relates to the exploitation measuring technology of automatic gearbox of vehicles controller, particularly to exploitation and the test platform of a kind of automatic mechanical type gearbox control.
Background technology
The exploitation of automatic speed-changing system relates generally to two big parts, and one is the change speed gear box including executor, and it two is gearbox control (TransmissionControlUnit, TCU).Automatic mechanical transmission (AutomaticManualTransmission, AMT) it is on the basis of manual transmission (ManualTransmission, MT), increase automatic shift-selecting and changing actuating mechanism to replace original manual shift actuating element.Therefore AMT has MT and automatic gear-box (AutomaticTransmission concurrently, AT) advantage, namely higher transmission efficiency, relatively low fuel consumption, the manufacturing cost of relative moderate, the operator intensity slowed down and the shift quality of lifting.At present, the research process of AMT is in comprehensively to the stage of intelligent transition.Difference according to actuator, AMT can be divided three classes: electromechanical, electropneumatic and electric hydraulic.Instantly, use direct current generator as the AMT of drive source in manufacturing cost, reliability, controllability has huge advantage, therefore enjoys favor.
TCU is the important component part of AMT, including hardware and software, is by machinery, the important carrier of electronics and control integration；Extremely important effect is played in automobile automatic gear, smooth ride etc..But, the exploitation of TCU need to be tested in a large number.In early days, owing to controlling the imperfection of logic, parts damages are easily caused, therefore real train test optimum selection absolutely not.For the exploitation of automobile electronic controller, mainly adopt hardware in loop (HardwareintheLoop, HIL) and two kinds of methods of automobile electronic control unit development platform in the market.Hardware in loop is some to be difficult to the parts that emulate with physical form at ring, and other parts at ring, carry out closed loop test with model together.Hardware in loop is to a certain degree alleviating working strength, but the complicated machinery still needing to material object connects and electrical connection.Particularly when stand configuration, when parts are installed unreasonable, will result in quadratic programming, waste time and energy.Automobile electronic control unit development platform achieves from full model automatically generating and running to embedded code, although enormously simplify development process, but it is expensive, and needs the training through specialty just can skillfully use.
Chinese invention patent CN101968630A adopts the method for hardware in loop, discloses a kind of simulated test bed for automatic transmission controller.Including a host, a real-time target machine, a signal occur and measure parts, an engine electronic control, multiple electromagnetic valve.By electromotor, change speed gear box, Full Vehicle Dynamics Modeling, and gearbox control is constitute emulation platform together with material object with engine electronic control.Chinese invention patent CN102354121A adopts automobile electronic control unit development platform, discloses a kind of method used in rapid prototype development and development platform thereof.Control strategy model is set up in host computer and can be downloaded in the processor of MicroAutobox.By the Signal-regulated kinase of hardware unit, from the various sensors of processor acquisition controlling strategy needs, switching signal；Drive peripheral real controllers by the power driver module of hardware unit, make equipment properly functioning.
TCU has two big main tasks, and one is replace engine management unit to carry out direct torque during gear shift, and two is that change speed gear box is selected gearshift control.Substantially being not related to the stability problem of vehicle therebetween, therefore in the hardware-in-loop simulation to TCU, automotive system model can simplify, it is not necessary to considers impact and the Steering of suspension.According to this feature, the present invention is based on AMT, it is proposed that a kind of TCU fast Development based on embedded system and test platform.
Summary of the invention
For the problems referred to above, it is contemplated that propose a kind of low cost, easily realize, simple in construction, can the exploitation of fast verification gearbox control and test platform.In early days, real train test and bench test, the reliability of checking TCU hardware and the correctness of control strategy are replaced.
In order to realize above-mentioned technical purpose, the present invention adopts the following technical scheme that
The exploitation of a kind of automatic mechanical type gearbox control and test platform, including accumulator, gearbox control, automatic mechanical type change speed gear box, accelerator pedal, car load emulator, CAN data collecting card and host computer, it is characterised in that:
Accumulator is electrically connected with gearbox control and car load emulator respectively；All being provided with power transfer module in gearbox control and car load emulator, 12V unidirectional current can be changed into 5V, gearbox control and accelerator pedal are electrically connected, and car load emulator and automatic mechanical type change speed gear box are electrically connected；Gearbox control and car load emulator (5) are all provided with CAN module, and both are connected by CAN；Host computer is connected with CAN by CAN data collecting card (6), it is achieved the collection of data.
Present invention also offers a kind of method that exploitation utilizing automatic mechanical type gearbox control is developed with test platform, comprising:
Step 1, when power on signal being detected, TCU order AMT makes the return trip empty shelves, simultaneously detection parking braking and door trip signal, if parking brake signals is 1, display lamp glimmers, if door trip signal is 1, display lamp glimmers and starts invalidating signal, and driver needs closed door and puts down parking brake；
Step 2, tabling look-up according to accelerator pedal position and engine speed two dimension to obtain motor torque, if more than electromotor torque capacity, electromotor effective torque takes torque capacity, otherwise takes torque of tabling look-up；
If step 3 current gear be 0 or clutch be in released state, then the race of engine, speed is 0；If engaging at shelves and clutch, calculate car load 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 conditions as resolution gear shift, are calculated gear shift speed by upper strata shift control strategy simultaneously, if current vehicle speed is not equal to gear shift speed, then continue waiting for；If current vehicle speed is equal to gear shift speed, then TCU provides target gear and sends request signal control electromotor of going beyond one's commission；
Step 5, order clutch separation, TCU bottom control program provides expectation gear selection position and shift pattern, adopts PWM to control to select gear shifting motor action successively；Select gear shift angular position pick up, by selecting gear shift current location to feed back to, TCU carries out real time correction；
Step 6, whole service process CAN signal pass in PC by CAN data collecting card (6) alternately, whole process is monitored by Labview, if gear shift is not fully complete, by Labview its reason of the data analysis collected, upper strata shift control strategy and bottom motor are controlled program and is modified；If gear shift completes, being delivered in CAN network by current gear, whole vehicle state is updated；
Step 7, changing the position of potentiometer thus changing the present road gradient, changing accelerator pedal position and can change the operating point of electromotor, changing combination button and can determine that vehicle operation is in drive shift or reverse gear
The fast Development of the present invention and test platform, owing to taking above technical scheme, compared with existing test platform, have the advantage that
1, it is car load emulator 5 (VSU), change speed gear box AMT and TCU to be tested at ring hardware.Few at ring component, analogue system is simple, and debugging is convenient.
2, the input of vehicle operating parameters such as accelerator pedal position, brake pedal position, the gradient etc. can be realized by various switches or potentiometer, and travel condition of vehicle such as speed, engine speed then can be indicated by LED.With low cost, easily realize.
3, electromotor, car load drive system and clutch realized with the form of embedded type C code by ideal mathematics model and be embedded in car load emulator 5 (VSU), providing car load environment for TCU to be tested.Simple general-purpose, can be widely applied in automobile electronic controller quick development platform.
4, host computer adopts Labview to build data acquisition and system for tracking, the data in emulation graphically can be shown in real time and preserved.Remain synchronization owing to simulation process shows with data, it is convenient to TCU gearshift control logic is analyzed and is improved.
Accompanying drawing explanation
Fig. 1 is TCU exploitation and test platform general frame figure；
Fig. 2 is that TCU exploitation controls logical flow chart with test platform；
Fig. 3 is Labview machine Interaction Interface Design flow chart.
Wherein: 1-accumulator, 2-gearbox control, 3-automatic mechanical type change speed gear box, 4-accelerator pedal, 5-car load emulator 5,6-CAN data collecting card, 7-host computer.
Detailed description of the invention:
Below in conjunction with accompanying drawing, the present invention is described in detail:
Fig. 1 is TCU fast Development and test platform general frame figure.Including accumulator 1, gearbox control 2 (TCU), automatic mechanical type change speed gear box 3 (AMT), accelerator pedal 4, car load emulator 5 (VSU), CAN data collecting card 6 and host computer 7.
Wherein, accumulator 1 is electrically connected with gearbox control 2 (TCU) and car load emulator 5 (VSU) respectively；Gearbox control 2 and car load emulator 5 (VSU) are all provided with power transfer module, 12V unidirectional current can be changed into 5V, gearbox control 2 and accelerator pedal 4 are electrically connected, and car load emulator 5 (VSU) and automatic mechanical type change speed gear box 3 (AMT) are electrically connected；Gearbox control 2 and car load emulator 5 (VSU) are all provided with CAN module, and both are connected by CAN；Host computer 7 is connected with CAN by CAN data collecting card 6, it is achieved the collection of data；
Described accumulator 1 is vehicle-mounted 12V accumulator, for gearbox control 2 to be tested, car load emulator 5 (VSU) with select gear shifting motor to power；
Described accumulator 1 voltage is gathered by car load emulator 5 (VSU), can monitor accumulator 1 duty in real time；
Described gearbox control 2 (TCU) is divided into hardware and software two parts.Hardware circuit is provided with power transfer module, signal processing module, MPU module, 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 to control；
The 12V unidirectional current of accumulator is changed into 5V unidirectional current by the power transfer module of described gearbox control 2 (TCU) hardware circuit, for other module in controller and select gear shift angular displacement sensor to power；
The signal processing module of described gearbox control 2 (TCU) hardware circuit includes the hysteresis voltage comparator circuit of the twitter circuit that disappears of switching signal, the single order RC filter circuit of analogue signal and tach signal, for eliminating burr in signal with different type and shake；
The MPU module of described gearbox control 2 (TCU) hardware circuit adopts Infineon's XC2000 series monolithic, including energization pins filter circuit, reset circuit and external crystal oscillation circuit；
The on-line debugging module of described gearbox control 2 (TCU) hardware circuit utilizes and can be connected with the dedicated emulated device of Infineon, carries out the burning of program and the online observation of variable and debugging；
The motor drive module of described gearbox control 2 (TCU) hardware circuit mainly includes motor drive ic and the H bridge being made up of MOSFET, is directly connected with gear shifting motor with step electric machine by connector；
Described gearbox control 2 (TCU) hardware circuit is provided with two-way current of electric detection module, is made up of 5 milliohm resistance and current detecting chip.5 milliohm resistance and motor series connection, current detecting chip gathers the both end voltage of 5 milliohm resistance, Ohm's law can flow through the electric current of step electric machine and gear shifting motor；
Described gearbox control 2 (TCU) hardware circuit CAN module mainly includes CAN driving chip, utilizes CAN module to send step electric machine position, gear shifting motor position, step electric machine electric current, gear shifting motor electric current and current gear signal；
Described gearbox control 2 (TCU) needs detection TCU under different operating modes, the reliability of hardware circuit during buty shifting, particularly motor drive module and the correctness of software shift control strategy and ride comfort；
Described accelerator pedal 4 is unique real vehicle signal generation device in platform.Owing to potentiometer lacks self-return function, and accelerator pedal 4 position is to determine the signal of interest that engine power output and TCU perform gear shift, hence speeds up pedal 4 and adopts real vehicle device；
Described accelerator pedal 4 is provided with displacement transducer, can produce two-way accelerator pedal 4 position signalling simultaneously, and two paths of signals can verify mutually.Described accelerator pedal 4 position signalling is gathered by car load emulator 5 (VSU)；
Described automatic mechanical type change speed gear box 3 (AMT) has five gears, provides the carrying of time-varying in gearshift procedure for gearbox control TCU to be tested and selects gear shifting motor electric current.Automatic mechanical type change speed gear box 3 comprises step electric machine, gear shifting motor, gear selecting angular displacement sensor, gear shift angular displacement sensor, gear selecting actuator and gear-shifting actuating mechanism；
Described AMT step electric machine slows down to increase by worm couple and turns round, and the rotary motion again through rack-and-pinion adjutant's motor becomes moving up and down, thus carrying out gear selecting operation；
Described AMT gear shifting motor slows down to increase again by worm couple and turns round, again through the dynamic shifting operation bar side-to-side movement of one-stage gear subband, it is achieved gear shift；
Described AMT selects gear shift angular displacement sensor for indicating the position of current gear selecting and selector fork；
The exploitation that described car load emulator 5 (VSU) is TCU provides car load environment.Being divided into hardware and software two parts, hardware circuit includes 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 unidirectional current is transformed into 5V unidirectional current by described car load emulator 5 (VSU) power transfer module；
Described car load emulator 5 (VSU) signal generating module includes ship type switch, potentiometer and combination button switch.Ship type switch is used for producing switching value, such as power on signal；Potentiometer is used for producing analogue signal, such as brake pedal position signal；Combination button switch is used for simulating multibreak switch amount, such as range seletor position；
Described car load emulator 5 (VSU) signal processing module includes the single order RC filter circuit of disappear twitter circuit and the analogue signal of switching signal, is used for burr and the shake of removing in signal；
The CAN module of described car load emulator 5 (VSU) is provided with CAN driving chip, is communicated with CAN network by CAN.Needs send power on, current acceleration, current vehicle speed, accelerator pedal 4 position and clutch state signal；
Described car load emulator 5 (VSU) alarm module is provided with light emitting diode and buzzer.To give a warning when car door opening, parking brake handle grip do not put down, select gear shifting motor excessive；
First vehicle and environment, electromotor, clutch and drive motor carried out mathematical modeling by comparatively ideal characteristic and convert the result to C code and be embedded in single-chip microcomputer by described car load emulator 5 (VSU) software；Bsp driver gathers and processes the signal from signal generating module；Top level control program computation speed, the whole-car parameters such as acceleration；
Described CAN data collecting card 6 one end connects CAN network, and one end connects the USB interface of host computer 7, it is achieved the transmission of data and the conversion of type；
Described host computer 7PC runs Labview program, it is possible to provide human-computer interaction interface clearly；In platform running, Real-time Collection also resolves step electric machine electric current, gear shifting motor electric current, step electric machine position, gear shifting motor position, current gear and GES, and result graphically shown and preserve.
Information for further illustrating the present invention is mutual, and the signal stream that TCU fast Development is concrete with test platform is illustrated by list below:
Referring to table 1, TCU fast Development and test platform signal stream, including in ring hardware, signal name, implementation and concrete signal type.
Table 1TCU fast Development and test platform signal stream
Described power on, parking braking, door trip and range seletor position are switching signal, can respectively by ship type switch and cubicle switch simulation.When the corresponding universal input and output port of single-chip microcomputer detects that high level inputs, will trigger corresponding control function to realize car load and power on, car load braking, the pressurization of wheel wheel cylinder and change the specific functions such as gear；
Described starting signal is step signal, and high level is sustainable, and reducible key switch therefore can be adopted to realize；
Described brake pedal position signal and grade signal are analogue signal.Potentiometer can realize the consecutive variations of 0-5V level, therefore can be used to simulating brake pedal and road grade；
Though described accelerator pedal position is similar to brake pedal, but potentiometer lacks self-return function, and acceleration pedal position signal directly affects shift strategy, of crucial importance, therefore adopts real vehicle accelerator pedal；
Described battery tension is 12V, and single-chip microcomputer input voltage requires to be 5V, therefore needs to arrange bleeder circuit on path；Nearly source side resistance resistance at least should be 1.4 times of near end resistance, so that the voltage being input to single-chip microcomputer is 5V to the maximum；
The described current detection module selecting gear shifting motor electric current to result from TCU hardware circuit.This module is made up of 5 milliohm resistance and current detecting chip.5 milliohm resistance and motor series connection, current detecting chip gathers the both end voltage of 5 milliohm resistance and is amplified 20 times, Ohm's law can flow through the electric current of step electric machine and gear shifting motor；
Described gear selecting and shift pattern result from the angular displacement sensor on AMT.This angular displacement sensor rated voltage is 5V, TCU power；
Described TCU fast Development realizes mutual with the signal in test platform by CAN.
For further illustrating the embodiment of patent of the present invention, the method that the exploitation utilizing automatic mechanical type gearbox control in conjunction with Fig. 2 in detail is developed with test platform.
Step 1, when power on signal being detected, TCU order AMT makes the return trip empty shelves, simultaneously detection parking braking and door trip signal, if parking brake signals is 1, display lamp glimmers, if door trip signal is 1, display lamp glimmers and starts invalidating signal, and driver needs closed door and puts down parking brake；
Step 2, tabling look-up according to accelerator pedal position and engine speed two dimension to obtain motor torque, if more than electromotor torque capacity, electromotor effective torque takes torque capacity, otherwise takes torque of tabling look-up；
If step 3 current gear be 0 or clutch be in released state, then the race of engine, speed is 0；If engaging at shelves and clutch, calculate car load 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 conditions as resolution gear shift, are calculated gear shift speed by upper strata shift control strategy simultaneously, if current vehicle speed is not equal to gear shift speed, then continue waiting for；If current vehicle speed is equal to gear shift speed, then TCU provides target gear and sends request signal control electromotor of going beyond one's commission；
Step 5, order clutch separation, TCU bottom control program provides expectation gear selection position and shift pattern, adopts PWM to control to select gear shifting motor action successively；Select gear shift angular position pick up, by selecting gear shift current location to feed back to, TCU carries out real time correction；
Step 6, whole service process CAN signal pass in PC by CAN data collecting card 6 alternately, whole process is monitored by Labview, if gear shift is not fully complete, by Labview its reason of the data analysis collected, upper strata shift control strategy and bottom motor are controlled program and is modified；If gear shift completes, being delivered in CAN network by current gear, whole vehicle state is updated；
Step 7, changing the position of potentiometer thus changing the present road gradient, changing accelerator pedal position and can change the operating point of electromotor, changing combination button and can determine that vehicle operation is in drive shift or reverse gear.Repeating said process, VSU just obtains new input state, it is achieved TCU controls logic checking under multi-state.
For further illustrating the embodiment of patent of the present invention, the design flow diagram of Labview will be described in conjunction with Fig. 3:
It is delivered to CAN in by gathering with calculated signal referring to Fig. 3, VSU and TCU, by CAN data collecting card 6, CAN signal is passed in PC.The CAN protocol of electromotor, clutch and whole vehicle model defines in the CAN module of VSU, selects gear shifting motor current location and selects the CAN protocol of gear shifting motor electric current to define in the CAN module of TCU.CAN signal is parsed by Labview according to CAN protocol, and shows to graphically.Realize the real-time tracking of test platform signal stream.
Although disclosing the present invention in detail with reference to accompanying drawing, it will be appreciated that, these describe merely exemplary, are not used for limiting the application of the present invention.Protection scope of the present invention is by appended claims, and various modification, remodeling and the equivalents made for invention when may be included in without departing from scope and spirit.
Claims (7)
1. the exploitation of an automatic mechanical type gearbox control and test platform, including accumulator (1), gearbox control (2), automatic mechanical type change speed gear box (3), accelerator pedal (4), car load emulator (5), CAN data collecting card (6) and host computer (7), it is characterised in that:
Accumulator (1) is electrically connected with gearbox control (2) and car load emulator (5) respectively；Gearbox control (2) and car load emulator (5) are all provided with power transfer module, 12V unidirectional current can be changed into 5V, gearbox control (2) and accelerator pedal (4) are electrically connected, and car load emulator (5) and automatic mechanical type change speed gear box (3) are electrically connected；Gearbox control (2) and car load emulator (5) are all provided with CAN module, and both are connected by CAN；Host computer (7) is connected with CAN by CAN data collecting card (6), it is achieved the collection of data.
2. the exploitation of automatic mechanical type gearbox control according to claim 1 and test platform, it is characterized in that: described accumulator (1) is vehicle-mounted 12V accumulator, for gearbox control to be tested (2), car load emulator (5) with select gear shifting motor to power；Described accumulator (1) voltage is gathered by car load emulator (5), can monitor accumulator (1) duty in real time.
3. the exploitation of automatic mechanical type gearbox control according to claim 1 and test platform, it is characterized in that: described gearbox control (2) hardware circuit includes power transfer module, signal processing module, MPU module, on-line debugging module, motor drive module, current of electric detection module and CAN module, wherein:
The 12V unidirectional current of accumulator is changed into 5V unidirectional current by power transfer module, for other module in controller and select gear shift angular displacement sensor to power；
Signal processing module includes the hysteresis voltage comparator circuit of the twitter circuit that disappears of switching signal, the single order RC filter circuit of analogue signal and tach signal, for eliminating burr in signal with different type and shake；
MPU module adopts Infineon's XC2000 series monolithic, including energization pins filter circuit, reset circuit and external crystal oscillation circuit；
On-line debugging module utilizes and can be connected with the dedicated emulated device of Infineon, carries out the burning of program and the online observation of variable and debugging；
Motor drive module includes motor drive ic and the H bridge being made up of MOSFET, is directly connected with gear shifting motor with step electric machine by connector；
Current of electric detection module, is made up of 5 milliohm resistance and current detecting chip；
5 milliohm resistance and motor series connection, current detecting chip gathers the both end voltage of 5 milliohm resistance, Ohm's law can flow through the electric current of step electric machine and gear shifting motor；
CAN module mainly includes CAN driving chip, utilizes CAN module to send step electric machine position, gear shifting motor position, step electric machine electric current, gear shifting motor electric current and current gear signal.
4. the exploitation of automatic mechanical type gearbox control according to claim 1 and test platform, it is characterized in that: accelerator pedal (4) is the exploitation real vehicle signal generation device with test platform of automatic mechanical type gearbox control, determine that engine power output and TCU perform gear shift by accelerator pedal (4) position；Described accelerator pedal (4) is provided with displacement transducer, and described accelerator pedal (4) position signalling is gathered by car load emulator (5).
5. the exploitation of automatic mechanical type gearbox control according to claim 1 and test platform, it is characterised in that:
The exploitation that described car load emulator (5) is TCU provides car load environment, and its hardware circuit includes car load emulator power transfer module, car load emulator signal generating module, car load emulator signal processing module, car load emulator MCU module, car load emulator on-line debugging module, car load emulator CAN module and alarm module；
12V unidirectional current is transformed into 5V unidirectional current by car load emulator power transfer module；
Car load emulator (5) signal generating module includes ship type switch, potentiometer and combination button switch, and ship type switch is used for producing switching value, and potentiometer is used for producing analogue signal, and combination button switch is used for simulating multibreak switch amount；
Described car load emulator (5) signal processing module includes the single order RC filter circuit of disappear twitter circuit and the analogue signal of switching signal, is used for burr and the shake of removing in signal；
The CAN module of described car load emulator (5) is provided with CAN driving chip, realizes communicating with CAN network by CAN；
Described car load emulator (5) alarm module is provided with light emitting diode and buzzer；When car door opening, parking brake handle grip do not put down, select gear shifting motor electric current to give a warning time excessive.
6. the exploitation of automatic mechanical type gearbox control according to claim 1 and test platform, it is characterised in that:
CAN data collecting card one end connects CAN network, and one end is connected with host computer (7), it is achieved the transmission of data and the conversion of type；
Described host computer (7) runs Labview program, and Real-time Collection also resolves step electric machine electric current, gear shifting motor electric current, step electric machine position, gear shifting motor position, current gear and GES, and result graphically shown and preserve.
7. the method that the exploitation of automatic mechanical type gearbox control according to claim 1 and test platform are developed, it is characterised in that comprise the steps:
Step 1, when power on signal being detected, TCU order AMT makes the return trip empty shelves, simultaneously detection parking braking and door trip signal, if parking brake signals is 1, display lamp glimmers, if door trip signal is 1, display lamp glimmers and starts invalidating signal, and driver needs closed door and puts down parking brake；
Step 2, tabling look-up according to accelerator pedal position and engine speed two dimension to obtain motor torque, if more than electromotor torque capacity, electromotor effective torque takes torque capacity, otherwise takes torque of tabling look-up；
If step 3 current gear be 0 or clutch be in released state, then the race of engine, speed is 0；If engaging at shelves and clutch, calculate car load 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 conditions as resolution gear shift, are calculated gear shift speed by upper strata shift control strategy simultaneously, if current vehicle speed is not equal to gear shift speed, then continue waiting for；If current vehicle speed is equal to gear shift speed, then TCU provides target gear and sends request signal control electromotor of going beyond one's commission；
Step 5, order clutch separation, TCU bottom control program provides expectation gear selection position and shift pattern, adopts PWM to control to select gear shifting motor action successively；Select gear shift angular position pick up, by selecting gear shift current location to feed back to, TCU carries out real time correction；
Step 6, whole service process CAN signal pass in PC by CAN data collecting card (6) alternately, whole process is monitored by Labview, if gear shift is not fully complete, by Labview its reason of the data analysis collected, upper strata shift control strategy and bottom motor are controlled program and is modified；If gear shift completes, being delivered in CAN network by current gear, whole vehicle state is updated；
Step 7, changing the position of potentiometer thus changing the present road gradient, changing accelerator pedal position and can change the operating point of electromotor, changing combination button and can determine that vehicle operation is 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 |
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| 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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