CN106285960B - A kind of calculation method and device of vehicle simulation parameter - Google Patents
A kind of calculation method and device of vehicle simulation parameter Download PDFInfo
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Abstract
The present invention provides the calculation methods and device of a kind of vehicle simulation parameter.Method includes: to obtain a target vehicle speed set by user and loop test time；When target vehicle speed is greater than zero and speed difference is not less than zero, current throttle pedal opening is obtained, throttle opening under current throttle aperture is obtained；Calculate engine output torque；Obtain gearbox output torque；Calculate the emulation speed of the N+1 times test；Using one neural network of time and engine coolant temperature off-line training, and computer sim- ulation oil consumption.The calculation method of vehicle simulation parameter of the invention improves the precision of emulation oil consumption by the compensation of temperature；The engine temperature of different circulation different moments can be provided, provide foundation for start-stop emulation；This method can be with simulation calculation engine start/stop and energy regenerating to the influence above oil consumption.In addition, this method can the different shift of transmission strategy of simulation calculation of influence with to(for) oil consumption, can be also used for the matching primitives of vehicle factor engine and speed changer.
Description
Technical field
The present invention relates to simulative automobile emulation field more particularly to a kind of calculation methods and device of vehicle simulation parameter.
Background technique
As shown in Figure 1, being the flow chart of the modeling and simulating method of existing scheme one.According to NEDC (European oil consumption and discharge
Evaluation criteria) test loop standard module output target vehicle speed and target gear.Body modules can be according to data such as input tires
Tire rotational speed is calculated, tire rotational speed is transmitted to transmission module and calculates engine speed.Target vehicle speed and target gear simultaneously
Air drag, rotary resistance etc. that resistance module calculates vehicle driving can be input to.These resistances are calculated by torque module and are sent out
The target output torque of motivation.Oil consumption module passes through engine speed and torque according to the universal data estimation oil consumption of discrepancy.Such as
Fruit considers that 25 degree of environment temperature modules can will calculate oil consumption multiplied by a constant.
Emulation mode 1 does not account for throttle or throttle opening, cannot achieve the simulation of Shifting in this way.To shadow
The precision of emulation is rung.Emulation mode 1 can be realized since temperature is for imitative after fuel consumption per hundred kilometers has been calculated multiplied by a parameter
The influence of true structure, since the differences such as the discharge capacity of different engines, number of cylinders and cylinder shape will have a direct impact on heating rate.While by
In the application of start-stop technology and Energy Recovery Technology etc..Since the oil consumption percentage that temperature influences can change.The oil of monotropic ratio
Consumption modification causes very big phantom error certainly.
As shown in Fig. 2, being the flow chart of the modeling and simulating method of existing scheme two.According to NEDC test loop standard module
Export target vehicle speed.Accelerator pedal module controls its opening angle according to the actual vehicle speed that body modules calculate.Engine block
Output torque and revolving speed are calculated according to engine speed and throttle opening angle.Transmission module is according to engine output torque
The output torque and revolving speed of speed changer are calculated with revolving speed.Body modules calculate vehicle according to the torque of input and the vehicle load of calculating
Speed.Average fuel consumption is calculated finally by load and engine speed.
Emulation mode 2 does not account for the influence of temperature.The oil consumption estimation of emulation mode 2 is opened according to the throttle of universal curve
It opens angle and torque interpolation is tabled look-up.Such calculation method may be implemented more accurate in conventional pull wires naturally aspirated engine
Emulation.But major part automobile uses electronic throttle and booster now.The use of these technologies will lead to throttle opening angle
It is not the only relationship that degree, which corresponds to oil consumption with torque,.So if certain error can be generated by continuing to use such calculate.
In existing scheme three, it may be implemented to calculate engine temperature for torque and fuel efficiency now with some models
It influences.The loss of machine of torque of engine under different temperatures is calculated by thermodynamics and force equation.
Method 3 is the calculating by temperature computation to engine loading, but do not have when carrying out NEDC emulation
Between correspond to the curve of engine temperature.Therefore this kind of module or formula are not available, and the artificial product of system module is not realized.
Summary of the invention
Engine consumption emulation mode inaccuracy and the technology realized without artificial product are asked in the prior art in order to overcome
Topic, the present invention provides the calculation methods and device of a kind of vehicle simulation parameter.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme:
The present invention provides a kind of calculation methods of vehicle simulation parameter, which comprises
A target vehicle speed set by user and loop test time are obtained, loop test is carried out；
When target vehicle speed is greater than zero and speed difference is not less than zero, current throttle pedal opening is obtained, according to preset throttle
The corresponding relationship of pedal opening, engine speed and throttle control aperture obtains throttle opening under current throttle aperture, institute
The difference of the emulation speed of n-th test in the loop test that speed difference is target vehicle speed and acquisition is stated, N is the integer greater than 0；
According to the corresponding relationship of throttle opening, engine speed and engine output torque, calculates engine output and turn round
Square；
Engine output torque and generator output torque are obtained, speed changer output is obtained according to speed ratio and base ratio and is turned round
Square；
According to the emulation speed for the drag evaluation the N+1 times test that gearbox output torque and vehicle generate in motion；
Using one neural network of time and engine coolant temperature off-line training, the temperature of neural network output passes through
The corresponding engine idle rotational of computation of table lookup；Engine, which is calculated, using idling speed if it is idling operation system emulates oil
Consumption, if being that non-idling operation system uses the calculating engine emulation oil consumption of simulating engine revolving speed.
Furthermore, it is understood that in the calculation method of the vehicle simulation parameter, one target carriage set by user of the acquisition
Speed and the loop test time, carry out loop test step after further include:
When target vehicle speed be zero or target vehicle speed be greater than zero and speed difference less than zero when, activation brake control；
According to the emulation car of the N+1 times test emulation of drag evaluation that the braking torque of acquisition and vehicle generate in motion
Speed.
Furthermore, it is understood that in the calculation method of the vehicle simulation parameter, it is described to utilize time and engine coolant
The temperature of one neural network of temperature off-line training, neural network output passes through the corresponding engine idle rotational of computation of table lookup；
Engine is calculated using idling speed if it is idling operation system and emulates oil consumption, if being that non-idling operation system uses emulation
Engine speed calculates after engine emulation oil consumption step further include:
The oil consumption of computer sim- ulation oil consumption and measurement comparison passes through the amendment of training algorithm function training one according to the two error
Neural network generates an oil consumption penalty coefficient；When carrying out simulation calculating, the emulation oil consumption result of operation is mended multiplied by the oil consumption
Repay coefficient.
Furthermore, it is understood that in the calculation method of the vehicle simulation parameter, one target carriage set by user of the acquisition
Speed and the loop test time, carry out loop test step after further include:
Engine halt signal is received, the emulation revolving speed of engine is zero, and emulation oil consumption at this time is zero；
Engine Start Signal is received, the emulation revolving speed of engine is preset idling, while exporting starting oil consumption.
Furthermore, it is understood that in the calculation method of the vehicle simulation parameter, it is described to be turned according to throttle opening, engine
Speed and the corresponding relationship of engine output torque, after obtaining engine output torque step further include:
It is recycled using output torque of the motor to engine, specifically:
Motor is in charging, according to the input speed of motor and input torque computation of table lookup generated energy；When motor is driving
When operating condition, according to revolving speed and output electricity computation of table lookup output torque.
The present invention also provides a kind of computing device of vehicle simulation parameter, described device includes:
Test loop module carries out loop test for obtaining a target vehicle speed set by user and loop test time；
Throttle and throttle opening control module, for when target vehicle speed is greater than zero and speed difference is not less than zero, acquisition to be worked as
Preceding gas pedal aperture is obtained according to the corresponding relationship of preset gas pedal aperture, engine speed and throttle control aperture
Throttle opening under to current throttle aperture, the speed difference are the imitative of n-th test in the loop test of target vehicle speed and acquisition
The difference of true speed, N are the integer greater than 0；
Engine block, for the corresponding relationship according to throttle opening, engine speed and engine output torque, meter
Calculate engine output torque；
Transmission module, for obtaining engine output torque and generator output torque, according to speed ratio and base ratio
Obtain gearbox output torque；
Speed emulation module, the drag evaluation N+1 for being generated in motion according to gearbox output torque and vehicle
The emulation speed of secondary test；
Oil consumption computing module, for utilizing one neural network of time and engine coolant temperature off-line training, nerve
The temperature of network output passes through the corresponding engine idle rotational of computation of table lookup；Idling speed is used if it is idling operation system
It calculates engine and emulates oil consumption, if being that non-idling operation system uses the calculating engine emulation oil consumption of simulating engine revolving speed.
Furthermore, it is understood that in the computing device of the vehicle simulation parameter, described device further include:
Brake control module, for when target vehicle speed be zero or target vehicle speed be greater than zero and speed difference less than zero when, activation
Brake control；
Generated in motion according to the braking torque and vehicle of acquisition drag evaluation the N+1 times of the speed emulation module
The emulation speed of test emulation.
Furthermore, it is understood that in the computing device of the vehicle simulation parameter, described device further include:
Oil consumption compensating module is compared for the oil consumption of computer sim- ulation oil consumption and measurement, is calculated according to the two error by training
Letter of law number corrects one neural network of training, generates an oil consumption penalty coefficient；The emulation oil of the operation when carrying out simulation calculating
Result is consumed multiplied by the oil consumption penalty coefficient.
Furthermore, it is understood that in the computing device of the vehicle simulation parameter, described device further include:
Engine start and stop module, is used for:
Engine halt signal is received, the emulation revolving speed of engine is zero, and emulation oil consumption at this time is zero；
Engine Start Signal is received, the emulation revolving speed of engine is preset idling, while exporting starting oil consumption.
Furthermore, it is understood that in the computing device of the vehicle simulation parameter, described device further include:
Energy recovery module is used for:
It is recycled using output torque of the motor to engine, specifically:
Motor is in charging, according to the input speed of motor and input torque computation of table lookup generated energy；When motor is driving
When operating condition, according to revolving speed and output electricity computation of table lookup output torque.
The beneficial effects of the present invention are: the calculation method of imitative vehicle simulation parameter of the invention is improved by the compensation of temperature
The precision of emulation oil consumption；The engine temperature of different circulation different moments can be provided, provide foundation for start-stop emulation；The party
Method can embody engine start/stop and energy regenerating to the influence above oil consumption.In addition, this method can embody different speed changes
Influence of the device Shifting for oil consumption can be also used for the matching primitives of vehicle factor engine and speed changer and based on model
Transmission calibration.
Detailed description of the invention
Fig. 1 shows the flow diagrams of the emulation oil consumption test method of the first automobile in the prior art；
Fig. 2 indicates the flow diagram of second of automobile emulation oil consumption test method in the prior art；
Fig. 3 indicates the flow chart of the calculation method of vehicle simulation parameter in the embodiment of the present invention；
Fig. 4 indicates the flow diagram of accelerator open degree control and brake pedal control in the embodiment of the present invention；
Fig. 5 indicates energy recovery process schematic diagram in the embodiment of the present invention；
Fig. 6 indicates oil consumption calculating process schematic diagram in the embodiment of the present invention；
Fig. 7 indicates the composition and execution flow chart of the computing device of vehicle simulation parameter in the embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, right below in conjunction with the accompanying drawings and the specific embodiments
The present invention is described in detail.
Referring to shown in Fig. 3, the present invention provides a kind of calculation methods of vehicle simulation parameter, which comprises step
100, a target vehicle speed set by user and loop test time are obtained, loop test is carried out；Step 200, when target vehicle speed is big
In zero and speed difference be not less than zero when, obtain current throttle pedal opening, according to preset gas pedal aperture, engine speed with
The corresponding relationship of throttle control aperture, obtains throttle opening under current throttle aperture, and the speed difference is target vehicle speed and obtain
The difference for the emulation speed that n-th is tested in the loop test taken, N are the integer greater than 0；Step 300, it is opened according to air throttle
The corresponding relationship of degree, engine speed and engine output torque calculates engine output torque；Step 400, engine is obtained
Output torque and generator output torque, obtain gearbox output torque according to speed ratio and base ratio；Step 500, according to change
The emulation speed for the drag evaluation the N+1 times test that fast device output torque and vehicle generate in motion；Step 600, when utilization
Between and one neural network of engine coolant temperature off-line training, neural network output temperature by computation of table lookup it is corresponding
Engine idle rotational；Engine is calculated using idling speed if it is idling operation system and emulates oil consumption, if being non-idling
Working condition system calculates engine using simulating engine revolving speed and emulates oil consumption.
The calculation method structure of vehicle simulation parameter in the embodiment of the present invention is simple, the volume suitable for many analogue systems
It translates；The structure for optimizing computation of table lookup effectively reduces the error as caused by interpolation arithmetic；Two neural networks are used
Carry out greatly reducing the error of emulation and actual measurement for the compensation of emulation oil consumption, at the same can be used for include start-stop with
The control strategy of energy regenerating is developed.
Specifically, it according to different regions and test request, obtains user and target vehicle speed and test loop time is carried out
After setting, loop test is carried out.And judged by the difference of target vehicle speed and the emulation speed of a preceding emulation testing be into
Row Throttle Opening Control still carries out brake control.For test loop using the time as axis of abscissas, target vehicle speed is defeated as axis of ordinates
Signal out.It will use integral, differential and Delay computing due to calculating, the output of test loop is it needs to be determined that the sampling time.
Sampling time determines the accuracy and speed of emulation.It will affect precision if the sampling time is excessive, the sampling time is too small to be will affect
The simulation calculation time, it is proposed that value range is between 0.01 to 1 second.
Using one neural network of time and engine coolant temperature off-line training, hundred kilometers are calculated according to analogue system
Synthesis oil consumption, while by measured data of the neural network learning on drum equipment for engine coolant temperature for
The influence of oil consumption, while start-stop control foundation can be provided.Calculation method is tabled look-up using output torque and revolving speed to determine and disappear
Fuel oil is consumed, as shown in table 1.
The corresponding relationship of 1 engine of table consumption and output torque and revolving speed
Further include the process of an oil consumption compensation after carrying out oil consumption calculating: the oil consumption of computer sim- ulation oil consumption and measurement comparison,
One neural network of training is corrected by training algorithm function according to the two error, generates an oil consumption penalty coefficient；Carry out
The emulation oil consumption result of operation when simulation calculating is multiplied by the oil consumption penalty coefficient.
Referring to shown in Fig. 6, the specific of calculating section of oil consumption is expressed as follows: study engine coolant temperature is adjusted
Engine speed under idling operation, if necessary to provide engine start/stop reference frame.Learning method is used in corresponding test
The experimental data under rotary drum platform is recycled, input is one nerve net of time and engine coolant temperature off-line training respectively
Network.Trained engine coolant temperature neural network is put into analogue system.The temperature of neural network output is by looking into
Meter calculates corresponding engine idle rotational.Idling speed is used if it is idling operation system, if being non-idling operation system
System uses simulating engine revolving speed.After temperature adjustmemt idling, system is solved is since temperature influence idling leads to emulation
The error of system oil consumption.But still there is the error that some physical equations cannot express in system, this error can pass through one
A new neural network learning compensates.Analogue system computer sim- ulation oil consumption is compared with oil consumption is surveyed.It is logical according to the two error
It crosses training algorithm function and corrects one neural network of training.An oil consumption can be generated by effective learning strategy in neural network
Penalty coefficient.When carrying out simulation calculating, the result of operation can be realized more accurately multiplied by the factor of compensation neural computing
Dynamic oil consumption emulation.
Referring to shown in Fig. 4, when target vehicle speed is greater than zero and speed difference is not less than zero, current throttle pedal opening, root are obtained
According to the corresponding relationship of preset gas pedal aperture, engine speed and throttle control aperture, obtain under current throttle aperture
Throttle opening, and obtained with this and calculate engine output torque and gearbox output torque.As another of this method
Embodiment, when target vehicle speed be zero or target vehicle speed be greater than zero and speed difference less than zero when, activation brake control；According to acquisition
Braking torque and the emulation speed of the N+1 times test emulation of drag evaluation that generates in motion of vehicle.Throttle and air throttle
Aperture control is all identical to be adjusted using PI controller, but activation condition and restrictive condition are not with brake control module principle
Together.The activation brake control when target vehicle speed is zero or target vehicle speed is greater than zero-speed difference less than zero.When target vehicle speed is greater than zero
Throttle Opening Control is activated when speed difference is more than or equal to zero simultaneously.Delay, root can be all activated when each Throttle Opening Control and brake control switching
According to empirical physiological response delay generally at 0.5-1 second.Output speed difference is zero when delay executes, when will after delay time
Output speed difference in real time.PI controller adjusts the test regulation that remain unchanged different, guarantees control error in prescribed limit after adjusting
It is interior.The control output that PI controller is respectively set according to the unlatchings range of gas pedal and brake pedal respectively simultaneously it is minimum with most
Big numerical value.In view of the response speed control signal of mechanical structure will correct its linear response by transmission function.
Accelerator open degree control is realized by a 2-D data look-up table, if attached drawing horizontal axis is engine speed, vertical pivot
For the aperture of gas pedal.Data are throttle opening.The tested automobile being placed on testing stand is started by recording difference
The corresponding relationship of machine revolving speed and accelerator open degree, obtains such as the following table 1.
1 engine speed of table and accelerator open degree mapping table
Calculating to engine output torque is also to be realized by a 2-D data look-up table, and in table 2, horizontal axis is hair
Motivation revolving speed, vertical pivot are throttle opening.Data are output torque.The reality output torque of engine block is also contemplated that rotation
The influence of inertia and pump damage, formula can be expressed as follows:
TEngine output=TEngine-IEngineaEngine-TPump damage。
2 engine output torque of table and the throttle opening table of comparisons
Furthermore, it is understood that the calculating and emulation of speed changer are segmented into two major classes: the first kind has the speed change of fluid torque-converter
Device, such as automatic transmission (AT) and stepless transmission (CVT).The second similar speed changer for having clutch, such as manual transmission
(MT), automatic mechanical transmission (AMT) and double-clutch speed changer (DCT).
1. the speed changer with fluid torque-converter, calculation formula can be according to two works of hydraulic torque converter lockout and non-locking
Condition.
2. there is the speed changer of clutch
In hydraulic torque converter lockout and unlock, its linear sound is corrected using transmission function according to the system mechanics response time
Answer curve.The speed changer of clutch class corrects its linear response curve using transmission function according to shift time in shift.Lock
Only control strategy and Shifting need to simulate according to the actual situation, provide the speed change of locking signal and corresponding analogue simulation time point
Device speed ratio.
As a kind of preferred mode of this method, influence of the external resistance to speed is considered in calculating speed.It is based on
The modeling method of longitudinal direction of car dynamic system.Running resistance considers resistance wheel, air drag, grade resistance and accelerates resistance
Power.
Resistance wheel: FWheel=fr×GLoad；
Air drag:
Grade resistance: FThe gradient=GLoad×sinα。
As the supplement to this calculation method, increases according to engine start/stop control and calculate the dynamics ginseng of engine
Number.The request of oil consumption computing module engine start/stop is supplied to according to target vehicle speed, emulation speed, brake and throttle.The control of module
Strategy processed can voluntarily be compiled according to different engines.When sending engine halt signal, system emulation engine speed is zero,
Oil consumption is zero.When sending Engine Start Signal, system restores engine idle rotational, while exporting starting oil consumption.Emulation system
System Engine Start Signal needs transmission function to filter.New technology needle can be provided for vehicle factor and the relevant supplier of engine
To the oil-saving effect of different automobile types and engine.
As the supplement to this calculation method, increases according to energy regenerating and calculate the kinetic parameter of engine.Root
According to emulation signal and control strategies such as emulation speed, brake, throttles, executes energy regenerating or provide torque to dynamical system.
If attached drawing energy recovery module includes motor and storage battery two parts.Torque can be provided to electric power generation according to control strategy vehicle
It is stored in storage battery or storage battery provides electric current driving power generation and realizes resistance driving.It can be vehicle factor and the relevant confession of engine
Quotient is answered to provide the oil-saving effect that new technology is directed to different automobile types and engine.
There is very big error when emulation in the physical equation of energy regenerating, there are also different systems there is very big difference
It is different.According to for different Feature Analyzes.Energy recovery module is realized using the method for data lookup table.Referring to table 3 and 4 institute of table
Show, when motor charges operating condition according to input speed and input torque computation of table lookup generated energy.Or when motor is in driving operating condition
When according to revolving speed and output electricity computation of table lookup output torque.The computation of table lookup method of energy recycling system can be showed effectively
Motor start and driveability, avoid based on physical equation emulation the big formula hardly possible of error problem.
Input speed and input torque mapping table when 3 motor of table charging operating condition
4 motor of table revolving speed and output electricity mapping table when driving operating condition
Corresponding above-mentioned calculation method, the present invention also provides a kind of computing device of vehicle simulation parameter, described devices
Include: test loop module, for obtaining a target vehicle speed set by user and loop test time, carries out loop test；Oil
Door and throttle opening control module, for obtaining current throttle pedal when target vehicle speed is greater than zero and speed difference is not less than zero
Aperture obtains current throttle according to the corresponding relationship of preset gas pedal aperture, engine speed and throttle control aperture
Throttle opening under aperture, the speed difference are the difference of the emulation speed of n-th test in the loop test of target vehicle speed and acquisition
Value, N are the integer greater than 0；Engine block, for according to throttle opening, engine speed and engine output torque
Corresponding relationship calculates engine output torque；Transmission module is turned round for obtaining engine output torque and generator output
Square obtains gearbox output torque according to speed ratio and base ratio；Speed emulation module, for according to gearbox output torque and
The emulation speed for the drag evaluation the N+1 times test that vehicle generates in motion；Oil consumption computing module, for utilizing time and hair
The temperature of one neural network of motivation coolant temperature off-line training, neural network output passes through the corresponding engine of computation of table lookup
Idling speed；Engine is calculated using idling speed if it is idling operation system and emulates oil consumption, if being non-idling operation system
System calculates engine using simulating engine revolving speed and emulates oil consumption.
The computing device of vehicle simulation parameter in the embodiment of the present invention constitutes simple, the volume suitable for many analogue systems
It translates；The structure for optimizing computation of table lookup effectively reduces the error as caused by interpolation arithmetic；Two neural networks are used
Carry out greatly reducing the error of emulation and actual measurement for the compensation of emulation oil consumption, at the same can be used for include start-stop with
The control strategy of energy regenerating is developed.
Furthermore, it is understood that described device further include: brake control module, for being zero or target vehicle speed when target vehicle speed
Greater than zero and when speed difference is less than zero, activation brake control；The speed emulation module exists according to the braking torque and vehicle of acquisition
The emulation speed of the N+1 times test emulation of the drag evaluation generated when driving.
Furthermore, it is understood that described device further include: oil consumption compensating module, the oil consumption pair for computer sim- ulation oil consumption and measurement
Than correcting one neural network of training by training algorithm function according to the two error, generating an oil consumption penalty coefficient；Into
The emulation oil consumption result of operation when row simulation calculating is multiplied by the oil consumption penalty coefficient.
Furthermore, it is understood that described device further include: engine start and stop module is used for: receiving engine halt signal, start
The emulation revolving speed of machine is zero, and emulation oil consumption at this time is zero；Engine Start Signal is received, the emulation revolving speed of engine is default
Idling, while exporting starting oil consumption.
Furthermore, it is understood that described device further include: energy recovery module is used for: being turned round using motor to the output of engine
Square is recycled, specifically: motor is in charging, according to the input speed of motor and input torque computation of table lookup generated energy；When
Motor is when driving operating condition, according to revolving speed and output electricity computation of table lookup output torque.
In inventive embodiments, module can use software realization, to be executed by various types of processors.For example,
One engine block may include the one or more physics or logical block of computer instruction, for example, it can be by
It is configured to object, process or function.Nevertheless, the executable code of engine block without physical equation in together, but
It may include the different instructions being stored in different positions, when being combined together in these command logics, constitute module
And realize the regulation purpose of the module.
In fact, engine block can be the either many item instructions of individual instructions, and can even be distributed in more
It on a different code segment, is distributed in distinct program, and is distributed across multiple memory devices.Similarly, operand
According to can be identified in module, and it can be realized according to any form appropriate and be organized in any appropriate type
In data structure.The operation data can be used as individual data collection and be collected, or can be distributed on different location (including
In different storage device), and at least partly can only be present in system or network as electronic signal.
When module can use software realization, it is contemplated that the level of existing hardware technique, it is possible to implemented in software
Module, without considering the cost, those skilled in the art can build corresponding hardware circuit to realize correspondence
Function, the hardware circuit includes conventional ultra-large integrated (VLSI) circuit or gate array and such as logic core
The existing semiconductor of piece, transistor etc either other discrete elements.Module can also use programmable hardware device, such as
Field programmable gate array, programmable logic array, programmable logic device etc. are realized.
Above-described is the preferred embodiment of the present invention, it should be pointed out that the ordinary person of the art is come
It says, can also make several improvements and retouch under the premise of not departing from principle of the present invention, these improvements and modifications also exist
In protection scope of the present invention.
Claims (8)
1. a kind of calculation method of vehicle simulation parameter, which is characterized in that the described method includes:
A target vehicle speed set by user and loop test time are obtained, loop test is carried out；
When target vehicle speed is greater than zero and speed difference is not less than zero, current throttle pedal opening is obtained, according to preset gas pedal
The corresponding relationship of aperture, engine speed and throttle control aperture obtains throttle opening under current throttle aperture, the speed
Difference is the difference of the emulation speed of n-th test in the loop test of target vehicle speed and acquisition, and N is the integer greater than 0；
According to the corresponding relationship of throttle opening, engine speed and engine output torque, engine output torque is calculated；
Engine output torque and generator output torque are obtained, gearbox output torque is obtained according to speed ratio and base ratio；
According to the emulation speed for the drag evaluation the N+1 times test that gearbox output torque and vehicle generate in motion；
Using one neural network of time and engine coolant temperature off-line training, the temperature of neural network output is by tabling look-up
Calculate corresponding engine idle rotational；Engine is calculated using idling speed if it is idling operation system and emulates oil consumption, such as
Fruit is that non-idling operation system uses the calculating engine emulation oil consumption of simulating engine revolving speed；
The oil consumption of computer sim- ulation oil consumption and measurement comparison corrects one nerve of training by training algorithm function according to the two error
Network generates an oil consumption penalty coefficient；When carrying out simulation calculating, the emulation oil consumption result of operation is compensated multiplied by the oil consumption is
Number.
2. the calculation method of vehicle simulation parameter as described in claim 1, which is characterized in that the acquisition one is set by user
Target vehicle speed and loop test time, carry out loop test step after further include:
When target vehicle speed be zero or target vehicle speed be greater than zero and speed difference less than zero when, activation brake control；
According to the emulation speed of the N+1 times test emulation of drag evaluation that the braking torque of acquisition and vehicle generate in motion.
3. the calculation method of vehicle simulation parameter as described in claim 1, which is characterized in that the acquisition one is set by user
Target vehicle speed and loop test time, carry out loop test step after further include:
Engine halt signal is received, the emulation revolving speed of engine is zero, and emulation oil consumption at this time is zero；
Engine Start Signal is received, the emulation revolving speed of engine is preset idling, while exporting starting oil consumption.
4. the calculation method of vehicle simulation parameter as described in claim 1, which is characterized in that it is described according to throttle opening,
The corresponding relationship of engine speed and engine output torque, after obtaining engine output torque step further include:
It is recycled using output torque of the motor to engine, specifically:
Motor is in charging, according to the input speed of motor and input torque computation of table lookup generated energy；When motor is in driving operating condition
When, according to revolving speed and output electricity computation of table lookup output torque.
5. a kind of computing device of vehicle simulation parameter, which is characterized in that described device includes:
Test loop module carries out loop test for obtaining a target vehicle speed set by user and loop test time；
Throttle and throttle opening control module, for obtaining current oil when target vehicle speed is greater than zero and speed difference is not less than zero
Door pedal opening is worked as according to the corresponding relationship of preset gas pedal aperture, engine speed and throttle control aperture
Throttle opening under preceding accelerator open degree, the speed difference are the emulation car of n-th test in the loop test of target vehicle speed and acquisition
The difference of speed, N are the integer greater than 0；
Engine block calculates hair for the corresponding relationship according to throttle opening, engine speed and engine output torque
Motivation output torque；
Transmission module is obtained for obtaining engine output torque and generator output torque according to speed ratio and base ratio
Gearbox output torque；
Speed emulation module, the drag evaluation the N+1 times survey for being generated in motion according to gearbox output torque and vehicle
The emulation speed of examination；
Oil consumption computing module, for utilizing one neural network of time and engine coolant temperature off-line training, neural network
The temperature of output passes through the corresponding engine idle rotational of computation of table lookup；It is calculated if it is idling operation system using idling speed
Engine emulates oil consumption, if being that non-idling operation system uses the calculating engine emulation oil consumption of simulating engine revolving speed；
Oil consumption compensating module is compared for the oil consumption of computer sim- ulation oil consumption and measurement, passes through training algorithm letter according to the two error
Number corrects one neural network of training, generates an oil consumption penalty coefficient；The emulation oil consumption knot of the operation when carrying out simulation calculating
Fruit is multiplied by the oil consumption penalty coefficient.
6. the computing device of vehicle simulation parameter as claimed in claim 5, which is characterized in that described device further include:
Brake control module, for when target vehicle speed be zero or target vehicle speed be greater than zero and speed difference less than zero when, activation brake
Control；
The drag evaluation the N+1 times test that the speed emulation module generates in motion according to the braking torque and vehicle of acquisition
The emulation speed of emulation.
7. the computing device of vehicle simulation parameter as claimed in claim 5, which is characterized in that described device further include:
Engine start and stop module, is used for:
Engine halt signal is received, the emulation revolving speed of engine is zero, and emulation oil consumption at this time is zero；
Engine Start Signal is received, the emulation revolving speed of engine is preset idling, while exporting starting oil consumption.
8. the computing device of vehicle simulation parameter as claimed in claim 5, which is characterized in that described device further include:
Energy recovery module is used for:
It is recycled using output torque of the motor to engine, specifically:
Motor is in charging, according to the input speed of motor and input torque computation of table lookup generated energy；When motor is in driving operating condition
When, according to revolving speed and output electricity computation of table lookup output torque.
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| CN111462571A (en) * | 2019-01-19 | 2020-07-28 | 上海赫鲁丝网络科技有限公司 | Digital virtual vehicle engine system |
| CN112849119B (en) * | 2019-11-12 | 2022-06-24 | 上海汽车变速器有限公司 | Multivariable torque optimizing control distribution method for engine and motor of hybrid electric vehicle |
| CN113468653A (en) * | 2020-03-31 | 2021-10-01 | 东北林业大学 | Vehicle longitudinal dynamics system identification method |
| CN111559387B (en) * | 2020-04-09 | 2022-06-14 | 宁波吉利汽车研究开发有限公司 | Energy-saving driving prompting method, device, equipment and storage medium |
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