CN104677645A - Test stand for power systems of automobiles, and automatic test method of working conditions - Google Patents
Test stand for power systems of automobiles, and automatic test method of working conditions Download PDFInfo
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Abstract
The invention relates to a test stand for power systems of automobiles, and an automatic test method of working conditions. The test stand for the power systems of the automobiles comprises a load simulation unit, a test control unit and a driver simulation unit, wherein the load simulation unit is used for simulating road loads, and is connected with a power system to be tested in a transmission manner; the test control unit is used for controlling the load simulation unit; the input interface of the driver simulation unit is used for inputting the information of working conditions, and the driver simulation unit is provided with a control interface for being connected with a whole-vehicle controller of the power system to be tested and an interface for acquiring actual vehicle speed; the information of working conditions at least comprises real-time given vehicle speed; the driver simulation unit generates control signals through the comparison of the actual vehicle speed and the given vehicle speed, and the whole-vehicle controller receives the control signals, so that the power system can run according to the real-time given vehicle speed. According to the automatic test method of working conditions, any operation of a driver is not needed, and the full automatic test is realized.
Description
Technical field
The present invention relates to a kind of automobile dynamic system testing table, and the operating mode automatic test approach of power system.
Background technology
Electric automobile performance and operating condition have substantial connection, and under different operating mode, its performance difference is very large, therefore, usually based on the power system of specific operation design electric automobile.As the infrastructure of power system of electric automobile exploitation, testing table must have dynamic operation condition analog functuion; General dynamometer test platform Work condition analogue function be that the electric treadle that manually operates and load governor realize, simple steady state condition simulation can only be carried out, not possess the function of simulation dynamic operation condition, need improvement badly.
Chinese patent document (application number is 201010150993) relates to a kind of simulation system for dynamic property of pure electric automobile.It is characterized in that comprising battery module, motor module, car load module, controller module, state of cyclic operation module and display apparatus module, also brake module is comprised in car load module, brake module comprises attachment submodule, controller module adopts PWM copped wave to control, and this system emulates level land and climbing operating mode, state of cyclic operation based on matlab software.Above-mentioned a kind of simulation system for dynamic property of pure electric automobile, not only can 3 indexs of analog simulation vehicle dynamic quality: max. speed, acceleration capacity, max. climb slope, all right analog simulation state of cyclic operation, to predict the continual mileage of automobile, also can the brake condition of simulated automotive, dope minimum braking distance and the braking time of automobile, user can go out the best ratio of gear of automobile to improve dynamic property and the continual mileage of automobile by adopting the method optimizing of matrix operation.
Said method belongs to sofeware simulation method, and due to the restriction of the mathematical model by power system complexity, simple software emulation is difficult to obtain precise results, and credibility, the availability of result must be checked by other approach.
Chinese patent document (application number is 201210119738) relates to a kind of pure electric vehicle power drive system coupling evaluation test platform.Comprise CAN, USB-To-USB card 1, entire car controller, message unit 1, message unit 2, electric machine controller, message unit 3, battery management system, charger controller, message unit 4, data acquisition system (DAS) and USB-To-USB card 2, industrial computer 1, industrial computer 2 etc.This pure electric vehicle power drive system is utilized to mate electric A.C. dynamometer simulation specified link Operation mode cycle in evaluation test platform, can be in optimized selection pure electric vehicle power assembly system matching scheme, by optimizing the methods such as kinematic train parameter, determine optimum power-driven system matching scheme.Also can test the power-driven system scheme of actual vehicle application, to evaluate the adaptability of power assembly system of electric vehicle and road condition.
Chinese patent document (application number is 200910104181) discloses a kind of hybrid power assembly performance matching test bench, and it comprises engine, clutch coupling, variator, engine controller ECU, generating/electromotion integrated motor I SG, electric machine controller IPU, power battery pack, battery management system BCU, entire car controller HCU, direct current transducer DC/DC, shifter, clutch pedal, brake pedal, accelerator pedal, two dynamometer machines, pedestal control system and rapid control prototyping dSPACE.Advantage of the present invention simulates whole vehicle state on threst stand, the critical piece of hybrid power system, power battery pack and BCU, HCU, IPU, DC/DC are simulated whole vehicle state arrange, compact conformation, testing program is simple, be easy to the Performance Match realizing hybrid power assembly on test-bed, car load can be simulated and carry out the working condition tests such as NEDC.
Power system testing table involved by above patent documentation, include dynamometer machine, for the actual loading that the resistance such as simulated roadway, air produces, make power system operation, detect the various data of major equipment, by data computational analysis power system whole efficiency, energy resource consumption etc., to evaluate power system performance.But above-mentioned two kinds of dynamic test systems can only carry out simple steady state condition simulation.
Chinese patent document (application number is 2013100763022) discloses a kind of vehicle drive system test method and implements the testing table of the method.Its scheme not only relates to the parts of the Approach for Vehicle Transmission System Test Bench such as dynamometer machine, entire car controller, also comprise drive simulation unit, for obtaining the control signal that a series of driver behavior (comprising clutch operating, throttle action, braking maneuver etc.) is formed, these control signals are used for the work of tested kinematic train, thus by the operating process of control system playback driver, repeatedly, for a long time kinematic train can be tested.This scheme introduces the concept of drive simulating, obtains power system performance under can embodying dynamic operation condition to a certain extent really.
The scheme that Chinese patent document (application number is 2013100763022) proposes, need to operate some by the upper testing table of driver, form the control signal of a series of (comprising clutch operating, throttle action, braking maneuver etc.) again, then continuous these control signals of playback, repeat to test power system.First its scheme needs the upper testing table of experienced driver to operate, and there are certain requirements driver; And testing table is not real vehicle road environment after all, the control signal distance truth being operated acquisition by driver still has different.Therefore the program simulation authenticity and automaticity still there is certain defect.
Summary of the invention
The object of this invention is to provide a kind of automobile dynamic system testing table and operating mode automatic test approach, in order to the existing method of testing that solves to the real not problem of the simulation of dynamic operation condition.
For achieving the above object, the solution of the present invention comprises:
A kind of automobile dynamic system testing table, comprising:
Load simulation unit, for simulated roadway load, and is in transmission connection with power system to be measured;
Controlling test unit, for controlling described load simulation unit;
Also be provided with driver's analogue unit, the input interface of described driver's analogue unit is for inputting work information; Described driver's analogue unit is provided with the interface for being connected with the entire car controller of power system to be measured and the interface for obtaining actual vehicle speed;
Described work information at least comprises the real-time given speed of a motor vehicle; Described driver's analogue unit is by contrast actual vehicle speed and the given speed of a motor vehicle, and produce control signal, entire car controller receives described control signal, and power system to be measured is run according to the real-time given speed of a motor vehicle.
Described testing table also comprises driving analogue unit, for analog-driven equipment.
Described controlling test unit controls connects described driving analogue unit, and is provided with the communication interface for communicating with the entire car controller of power system to be tested.
Described controlling test unit sampling connects described load simulation unit; Described driver's analogue unit is connected with described controlling test unit communication, to obtain described actual vehicle speed.
Described driver's analogue unit control linkage accelerator pedal actuator and brake actuator, accelerator pedal actuator and brake actuator are for driving accelerator pedal and brake pedal.
Described load simulation unit is load dynamometer machine; Described driving analogue unit is for driving dynamometer machine; Described controlling test unit sampling connects the rotating speed and torque sensor that are arranged in the rotating shaft of load dynamometer machine.
The operating mode automatic test method of described testing table:
To make work information is supplied to driver's analogue unit, work information at least comprises the real-time given speed of a motor vehicle;
Driver's analogue unit obtains real-time actual vehicle speed, by contrast actual vehicle speed and the given speed of a motor vehicle, produce the entire car controller of control signal to power system to be measured, vehicle control unit controls power system to be measured, power system to be measured is run according to the real-time given speed of a motor vehicle; When contrasting actual vehicle speed and the given speed of a motor vehicle, if actual vehicle speed is less than the given speed of a motor vehicle, then produce acceleration control signal; If actual vehicle speed is greater than the given speed of a motor vehicle, then produce brake control signal.
Described work information is speed, temporal information.
Described work information also comprises the road grade information of corresponding speed, time, for being supplied to controlling test unit, carries out gradient simulation with control load analogue unit.
The operating mode automatic test approach that the present invention proposes, operates without any need for human pilot, full automaticly to test; And the work information adopted comprises velocity information, automatic generating run instruction, instead of record operational order itself, the authenticity of simulation is strong.
Work information is set to speed, temporal information, is applicable to very much testing urban public traffic vehicles.
Accompanying drawing explanation
Fig. 1 is the structural drawing of the embodiment of the present invention 1;
Fig. 2 is the structural drawing of the embodiment of the present invention 2;
Fig. 3 is the structural drawing of the embodiment of the present invention 3;
Fig. 4 is the structural drawing of the embodiment of the present invention 4;
Fig. 5 is the control block diagram of the embodiment of the present invention 3.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described in detail.
Embodiment 1
As shown in Figure 1, a kind of automobile dynamic system testing table, comprising:
Load simulation unit, for simulated roadway load, and is in transmission connection with power system to be measured; Load simulation unit is typically chosen in controlled rotation equipment, as dynamometer machine.
Controlling test unit, for controlling described load simulation unit; Controlling test unit, according to the information of vehicles set in advance, as parameters such as car weight, front face area, road resistances, simultaneously according to current actual vehicle speed, utilize dynamics of vehicle principle, calculate resistance suffered by vehicle, resistance is passed to load simulation unit with the form of target torque.
Driver's analogue unit, the input interface of described driver's analogue unit for inputting work information, and is provided with the control interface for being connected with the entire car controller of power system to be measured, and obtains the interface of actual vehicle speed;
Described work information at least comprises the real-time given speed of a motor vehicle; Described driver's analogue unit, by contrast actual vehicle speed and the given speed of a motor vehicle, produces control signal to described entire car controller, and power system to be measured is run according to the real-time given speed of a motor vehicle.
Driver's analogue unit adopts closed-loop control, the difference being calculated the actual vehicle speed obtained by sensor collection is deducted according to the target vehicle speed in work information, if difference is just, illustrate that actual vehicle speed is less than target vehicle speed, accelerate, if difference is negative, illustrate that actual vehicle speed is greater than target vehicle speed, carry out control for brake.The acceleration produced or braking are transferred to entire car controller by above-mentioned control interface, accelerated or slow down by vehicle control unit controls power system to be measured.As shown in Figure 1, the control interface of above-mentioned driver's analogue unit directly connects entire car controller.
In the present embodiment, actual vehicle speed is by sensor to the rotating speed of load simulation unit, torque measurement, and then obtain through calculating, driver's simulator is connected with controlling test unit.As other embodiments, driver's analogue unit also can directly connecting sensor to obtain required information.
It should be noted that, driver's analogue unit and controlling test unit can independently be arranged, and also can be integrated in a host computer.In addition, power system to be measured is the power system of power-driven power system or other energy forms.Driver's analogue unit produces control signal can directly arrive entire car controller, also can arrive control topworks (as non-electrical is stopped product, then needing brake actuator execution coherent signal), and arrive described entire car controller simultaneously.
Embodiment 2
As shown in Figure 2, distinguish with embodiment 1 and be, testing table also comprises driving analogue unit, for analog-driven equipment.Driving arrangement refers to engine, drive motor etc., if drive analogue unit simulated engine, power system to be measured is power-driven power system, then pilot system simulates hybrid power system on the whole.
In embodiment 1, entire car controller can apply to control to power system to be measured, controls the driving mechanism in power system to be measured specifically.In embodiment 2, because add driving analogue unit, in order to accelerate, slow down control to power system to be measured, also need to control driving analogue unit.
If drive analogue unit simulated machine, entire car controller can control by corresponding electric machine controller or ECU the driving analogue unit being used for simulated machine.
If drive analogue unit simulated engine.Vehicle control unit controls connecting engine ECU, Engine ECU controls the driving analogue unit being used for simulated engine.
To drive analogue unit simulated engine.Driver's analogue unit adopts closed-loop control, a kind of control mode is: deduct the difference being calculated the actual vehicle speed obtained by sensor collection according to the target vehicle speed in work information, if difference is just, illustrate that actual vehicle speed is less than target vehicle speed, now braking aperture is 0, according to the size of difference, and the output calculation accelerator open degree of power system to be measured, if difference is negative, illustrate that actual vehicle speed is greater than target vehicle speed, now accelerator open degree is 0, calculates the size of braking aperture according to the size of difference.The accelerator open degree produced or braking aperture are transferred to entire car controller by above-mentioned control interface, by accelerator open degree or the braking aperture of vehicle control unit controls analog-driven unit; Meanwhile, entire car controller also controls the driving mechanism in power system to be measured, makes the speed compliance requirement of the output of power system.Drive analogue unit can adopt motor or engine, when adopting motor, need to be converted to motor control signal to above-mentioned accelerator open degree or braking opening amount signal.When adopting engine, directly can use accelerator open degree or braking opening amount signal.
About the distribution between power system to be measured in driving force, driving dynamometer machine, the distribution in damping force between mechanical braking and other damping force, does not belong to the category that this patent is discussed.
Embodiment 3
The difference of the present embodiment and embodiment 2 is:
The first, the control interface of driver's analogue unit connects entire car controller by actuating unit.Above-mentioned actuating unit refers to accelerator pedal actuator and brake actuator, and the signal for faster that driver's analogue unit produces and brake signal send into accelerator pedal actuator and brake actuator respectively, control accelerator pedal and brake pedal respectively by them.Accelerator pedal and brake pedal are all parts for the vehicle of power system to be measured, adopt this form can also take into account test to accelerator pedal and brake pedal.In addition, brake pedal is also associated with the mechanical braking arrangement of vehicle, thus also can test mechanical arrestment mechanism.
The second, by controlling test unit (in the present embodiment, controlling test unit is Dynamometer Control device), driving analogue unit (in the present embodiment, driving analogue unit for driving dynamometer machine) is controlled.So entire car controller is connected by car load bus communication with Dynamometer Control device, to obtain signal for faster and the brake signal of accelerator pedal and brake pedal generation.
As shown in Figure 5, driver's analogue unit contrast actual vehicle speed and the given speed of a motor vehicle, control accelerator pedal actuator and brake actuator, thus produce control signal to described entire car controller.
Control method is:
To make work information is supplied to driver's analogue unit, work information at least comprises the real-time given speed of a motor vehicle;
Driver's analogue unit obtains real-time actual vehicle speed, by contrast actual vehicle speed and the given speed of a motor vehicle, produce the entire car controller of control signal to power system to be measured, vehicle control unit controls power system to be measured, Dynamometer Control device controls to drive dynamometer machine, and power system to be measured is run according to the real-time given speed of a motor vehicle;
When contrasting actual vehicle speed and the given speed of a motor vehicle, if actual vehicle speed is less than the given speed of a motor vehicle, then produce acceleration control signal; If actual vehicle speed is greater than the given speed of a motor vehicle, then produce brake control signal.
Working condition signal makes to obtain speed, temporal information, represents the situation of change that speed (is equal to road) in time.Applicable city bus is set like this, particularly uses the bus rapid transit of bus rapid transit special lane, the work information of formulation, such as, be a period at the uniform velocity, a period accelerates, and a period slows down.
Embodiment 4
The difference of the present embodiment and embodiment 3 is, work information is not only speed, temporal information, also comprise corresponding road grade information, be supplied to controlling test unit, at controlling test unit according to the information of vehicles set in advance, as car weight, front face area, road resistance, current actual vehicle speed, when calculating resistance suffered by vehicle, introduce the calculating of the gradient simultaneously, resistance is passed to load simulation unit with the form of target torque.
Be presented above concrete embodiment, but the present invention is not limited to described embodiment.Basic ideas of the present invention are above-mentioned basic scheme, and for those of ordinary skill in the art, according to instruction of the present invention, designing the model of various distortion, formula, parameter does not need to spend creative work.The change carried out embodiment without departing from the principles and spirit of the present invention, amendment, replacement and modification still fall within the scope of protection of the present invention.
Claims (9)
1. an automobile dynamic system testing table, comprising:
Load simulation unit, for simulated roadway load, and is in transmission connection with power system to be measured;
Controlling test unit, for controlling described load simulation unit;
It is characterized in that, be also provided with driver's analogue unit, the input interface of described driver's analogue unit is for inputting work information; Described driver's analogue unit is provided with the interface for being connected with the entire car controller of power system to be measured and the interface for obtaining actual vehicle speed;
Described work information at least comprises the real-time given speed of a motor vehicle; Described driver's analogue unit is by contrast actual vehicle speed and the given speed of a motor vehicle, and produce control signal, entire car controller receives described control signal, and power system to be measured is run according to the real-time given speed of a motor vehicle.
2. a kind of automobile dynamic system testing table according to claim 1, it is characterized in that, described testing table also comprises driving analogue unit, for analog-driven equipment.
3. a kind of automobile dynamic system testing table according to claim 2, is characterized in that, described controlling test unit controls connects described driving analogue unit, and is provided with the communication interface for communicating with the entire car controller of power system to be tested.
4. a kind of automobile dynamic system testing table according to claim 1 or 2 or 3, is characterized in that, described controlling test unit sampling connects described load simulation unit; Described driver's analogue unit is connected with described controlling test unit communication, to obtain described actual vehicle speed.
5. a kind of automobile dynamic system testing table according to claim 1 or 2 or 3, it is characterized in that, described driver's analogue unit control linkage accelerator pedal actuator and brake actuator, accelerator pedal actuator and brake actuator are for driving accelerator pedal and brake pedal.
6. a kind of automobile dynamic system testing table according to Claims 2 or 3, is characterized in that, described load simulation unit is load dynamometer machine; Described driving analogue unit is for driving dynamometer machine; Described controlling test unit sampling connects the rotating speed and torque sensor that are arranged in the rotating shaft of load dynamometer machine.
7., for the operating mode automatic test approach of testing table described in claim 1, it is characterized in that:
To make work information is supplied to driver's analogue unit, work information at least comprises the real-time given speed of a motor vehicle;
Driver's analogue unit obtains real-time actual vehicle speed, by contrast actual vehicle speed and the given speed of a motor vehicle, produce the entire car controller of control signal to power system to be measured, vehicle control unit controls power system to be measured, power system to be measured is run according to the real-time given speed of a motor vehicle; When contrasting actual vehicle speed and the given speed of a motor vehicle, if actual vehicle speed is less than the given speed of a motor vehicle, then produce acceleration control signal; If actual vehicle speed is greater than the given speed of a motor vehicle, then produce brake control signal.
8. operating mode automatic test approach according to claim 7, is characterized in that, described work information is speed, temporal information.
9. operating mode automatic test approach according to claim 8, is characterized in that, described work information also comprises the road grade information of corresponding speed, time, for being supplied to controlling test unit, carries out gradient simulation with control load analogue unit.
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