CN109489997A - A kind of automobile suspension system multifunctional testing platform and its test method - Google Patents
A kind of automobile suspension system multifunctional testing platform and its test method Download PDFInfo
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- CN109489997A CN109489997A CN201811569291.0A CN201811569291A CN109489997A CN 109489997 A CN109489997 A CN 109489997A CN 201811569291 A CN201811569291 A CN 201811569291A CN 109489997 A CN109489997 A CN 109489997A
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a kind of vehicle suspension system multifunctional testing platform and its test method, the test platform includes suspension test-bed and TT&C system；The actuator excitation head that suspension experimental stand includes rack ontology, the electric oil cylinder being connected with rack ontology and spring carried mass analog module, is connected with the top of electric oil cylinder, the pallet that is connected with actuator excitation head, the wheel stiffnesses module being fixedly connected with the tray, the unsprung mass analog module being connected with wheel stiffnesses module, stepper motor, the gas source feed system connecting with unsprung mass analog module top, TT&C system includes various kinds of sensors, data collecting card, target machine, Suspension control development board, host；The test method includes the suspension property that helical spring, spring carried mass analog module and the unsprung mass analog module by adjusting tire stiffness is simulated can be tested under various and various working；The present invention has the characteristics that shorten the development cycle, reduces research and development cost and be recycled.
Description
Technical field
The present invention relates to a kind of automobile testing device and test methods, are specifically related to a kind of multi-functional survey of automobile suspension system
Try platform and its test method.
Background technique
Suspension is one of important assembly of Hyundai Motor, is a kind of device that vehicle frame is connected with vehicle bridge, has and mitigates
Injustice fluctuation road surface is transmitted to the impact force of vehicle frame, and vibrates caused by decaying thus.When carrying out the test of suspension system, tradition
Pure Computer Simulation be emulated using the method for founding mathematical models, although implement it is high-efficient, at low cost, imitate
True result is largely dependent upon the accurate of mathematical model, cannot be effectively reflected true road environment.If real vehicle road
Test the influence that then will receive hardware cost, environmental factor in road, it is difficult to test the suspension in vehicle traveling process under extreme operating condition
System performance.
Summary of the invention
Goal of the invention: the present invention provides a kind of automobile suspension system multifunctional testing platform, and it is outstanding can to simulate entire vehicle
The operating condition of frame system realizes the test of the performance tests such as automobile suspension system, damper, air spring, suspension controller；This
The another object of invention is to provide four kinds of test methods based on this vehicle suspension system multifunctional testing platform.
Technical solution: a kind of vehicle suspension system multifunctional testing platform, including suspension test-bed and TT&C system；It is outstanding
Frame experimental stand includes rack ontology, the electric oil cylinder being connected with rack ontology and spring carried mass analog module and electric oil cylinder
The connected actuator excitation head in top, the pallet being connected with actuator excitation head, the wheel stiffnesses mould being fixedly connected with the tray
Block, the unsprung mass analog module being connected with wheel stiffnesses module, the stepper motor being connect with unsprung mass analog module top,
Gas source feed system；TT&C system includes the acceleration sensor fixed on the top of spring carried mass component, in nonspring carried mass group
Fixed displacement sensor between part and pallet, force snesor are fixed on air spring upper end, data collecting card respectively with acceleration
Sensor, displacement sensor, force snesor are connected, and electric oil cylinder, data collecting card, target machine, hangs electric oil cylinder driver
Frame control development board, host are sequentially connected.
A method of automobile suspension system test is carried out based on above-mentioned test platform, comprising the following steps:
A, it is tested automotive suspension and is installed on suspension test-bed, the motion control signal of target machine is defeated by data collecting card
Electric oil cylinder driver, the vibration of driving electric oil cylinder output different frequency and amplitude are given out, which makes actuator excitation head
Apply vibrational excitation, motivates unsprung mass analog module vertical vibration；
B, the vibration of electric oil cylinder passes to bracket and spring carried mass component by air spring and damper, makes spring charge material
Amount analog module is vibrated up and down vertically along the sliding block at both ends；
C, received signal is transmitted to data collecting card by acceleration transducer, displacement sensor, force snesor, by data
Signal transmitting to host, is shown each sensing data by the Labview platform of host, obtains spring carried mass by capture card
Analog module vertical acceleration, suspension move the signals such as stroke and unsprung mass analog module acceleration.
A method of damper test is carried out based on above-mentioned test platform, comprising the following steps:
A, it is tested damper to be installed between the pallet of suspension test-bed and spring carried mass analog module, it is made only can
Movement is generated by the vibration of actuator excitation head；
B, the control signal of target machine is exported by data collecting card gives electric oil cylinder driver, driving electric oil cylinder output
The vibration of different frequency and amplitude, so that actuator excitation head be made to apply vibrational excitation；
C, actuator excitation head acts on damper, and acceleration transducer, displacement sensor, force snesor receive damper
The signal generated in different conditions, by data collecting card by signal transmitting to host, host is on Labview platform
Export damper speed characteristic curve.
A method of air spring test is carried out based on above-mentioned test platform, comprising the following steps:
A, be tested air spring be installed on suspension test-bed between pallet and spring carried mass analog module, gas source supply
It is inflated to system to air spring；
B, actuator excitation head compresses an impulse stroke to air spring from the bottom up；
C, pressure sensor and displacement sensor measure the gas pressure and stroke signal of air spring compression process, data
Capture card through by signal transmitting to host, the real-time delivery air spring rate characteristic in TT&C software interface.
A method of suspension controller test is carried out based on above-mentioned test platform, comprising the following steps:
A, host establishes a quarter automobile suspension system model under Simulink environment, using Real-
Control strategy and car model are generated Standard Control Procedure C code by TimeWorkshop, are generated by compiler executable
Program is downloaded in target machine or Suspension control development board by data line；
B, power on, electric oil cylinder driver drives electric oil cylinder to start work, to make actuator excitation head to vapour
Suspension applies excitation；
C, data collecting card acquires the signal of acceleration transducer, displacement sensor and force snesor in real time, and data are led to
It crosses data line and is conveyed to host, TT&C software interface can be with each signal of real-time display；
D, after Suspension control exploitation plate control signal receives sensor signal, starting control program is calculated, is judged
And decision, it generates control instruction and is conveyed to automotive suspension executing agency, adjusted in real time；
E, test result is handled, whether analysis suspension property meets design requirement, if not satisfied, return step a modification control
System strategy regenerates control program and carries out Secondary energy test, until meeting the requirements.
The utility model has the advantages that (1) present invention utilizes hardware in loop theory, when test, can be embedded in the portions such as solenoid valve difficult to model
Point in kind and signal interaction between target machine or Suspension control development board, not only simplify mathematical model difficulty can test again it is outstanding
Frame controls program.(2) present invention can be tested a variety of by adjustable spring carried mass, nonspring carried mass, rigidity of helical spring
The suspension property of vehicle, various working, while platform test can shorten new product development cycle.(3) present invention can test
The performance of damper, bearing spring, passive suspension, Active suspension and semi-active suspension there is a set of equipment can test a variety of
The function of automobile component.The development cost of automotive suspension can be significantly reduced in a tractor serves several purposes.
Detailed description of the invention
Fig. 1 is that the present invention carries out a quarter automobile suspension system test structural schematic diagram；
Fig. 2 is that the present invention carries out vibration-damper characterist test structural schematic diagram；
Fig. 3 is that the present invention carries out spring performance test structural schematic diagram；
Fig. 4 is that the present invention carries out suspension controller test structural schematic diagram；
Fig. 5 is the flow chart that the present invention carries out experimental data excavation.
Specific embodiment
A kind of vehicle suspension system multifunctional testing platform, test platform include suspension test-bed and TT&C system.It is outstanding
Frame experimental stand includes rack ontology, the electric oil cylinder being connected with rack ontology and spring carried mass analog module and electric oil cylinder
The connected actuator excitation head in top, the pallet being connected with actuator excitation head, the wheel stiffnesses mould being fixedly connected with the tray
Block, the unsprung mass analog module being connected with wheel stiffnesses module, the stepper motor being connect with unsprung mass analog module top,
Gas source feed system.Rack ontology is made of iron floor, gantry type frame, bracket and sliding block, and wherein gantry type frame passes through spiral shell
Bolt is fixed on iron floor, and sliding block is installed at bracket both ends, and sliding block can be slided up and down along gantry type frame column；Exciting force mechanisms packet
Include electric oil cylinder and actuator excitation head, it is possible to provide the exciting forces such as sine, cosine, triangular wave, saw type wave；Spring carried mass simulates mould
Block is composed of quality mass block of different sizes, simulation no-load, semi-load and the various workings such as fully loaded；Unsprung mass simulation
Module is composed of the different mass block of quality, analog different automobile types；Gas source feed system air cleaner, air compression
Machine, gs-oil separator, drier, vacuum tank, air valve and connection tracheae can provide high pressure gas to air spring or air suspension
Source；Wheel stiffnesses module is composed of the different helical spring of rigidity, the automobile tire of analog different-stiffness.
TT&C system is made of signal acquisition module, observing and controlling hardware, TT&C software and control instruction output module.Signal is adopted
Collection module is made of acceleration transducer, displacement sensor, force snesor and data collecting card, can acquire measurand in real time
Various types of signal；Observing and controlling hardware is made of host, target machine and Suspension control development board, and host Simulink software is established
Suspension automotive system model and automotive engineering parameter generate Standard Control Procedure C code, warp using Real-TimeWorkshop
It crosses after compiling successfully and generates on control software download to target machine or Suspension control development board, for controlling Active suspension or half master
Dynamic suspension；TT&C software is installed on host based on Labview software development, connects data acquisition by USB data line
Card, can be with real-time display data by software interface, and are stored in hard disk.In terms of information flow, acceleration transducer, position
The signal flows data collecting card such as displacement sensor and force snesor, signal are conveyed to target machine, host after A/D is converted
With Suspension control development board, control instruction is conveyed to the execution such as electric oil cylinder, electric oil cylinder driver, stepper motor and solenoid valve
Mechanism.
Fig. 1 is a quarter automobile suspension system test chart, is illustrated by taking air suspension as an example, main feature step is such as
Under:
A, the motion control signal of target machine 22 is exported by data collecting card 20 to electric oil cylinder driver 19, driving electricity
Dynamic oil cylinder 3 makes the vibration of different frequency, amplitude, so that so that actuator excitation head 4 is applied vibrational excitation makes nonspring carried mass group
Part 9 generates vertical upper and lower displacement under the drive of electric oil cylinder 3,
B, the vibration of actuator excitation head 4 can pass to bracket 16 and spring carried mass by air spring 12 and damper 11
Component 14, the vibration for being displaced spring carried mass component 14 vertically along the sliding block 17 at both ends.
C, host 23 establishes automobile suspension system simulation model under Simulink environment, using Real-
TimeWorkshop generates Standard Control Procedure C code and downloads in target machine 22, and each sensor signal is through signal acquisition module
It is transmitted to data collecting card 20, feeds back to host 23 through signal conditioning module 21, each sensor number is shown by host 23
According to obtaining spring carried mass acceleration, suspension moves stroke and air spring internal pressure signal, the variation of monitoring performance curve and appropriate adjustment
Parameter evaluates the control effect of semi-active suspension control algolithm.
Fig. 2 is vehicle shock absorber characteristic test method, is illustrated by taking adaptive transmission control as an example, main feature step
It is as follows:
A, after spring carried mass component 14 is stretched to suitable height, keep the top of damper 11 and bracket 16 fixed, adjustment
The position of electric oil cylinder 3 and actuator excitation head 4 makes the center of pallet 5 be directed at the installation point of 11 lower end of damper；
B, after being fastenedly connected, the motion control signal of target machine 22 is exported by data collecting card 20 to be driven to electric oil cylinder
Device 19, driving electric oil cylinder 19 makes the vibration of different frequency, amplitude, so that actuator excitation head 4 be made to apply vibrational excitation；
C, the damping of damper 11 is divided into soft, medium, hard three states, and driving stepper motor 10 drives the revolving valve of damper 11
Different angles is rotated together, so as to cause the area of 11 throttle orifice of damper, realizes soft, medium, hard three kinds of states of damping
Variation, acceleration transducer 13, displacement sensor 18, force snesor 15 receive the signal generated in 11 different conditions of damper
It is transmitted to data collecting card, data collecting card 20 transmits signal to host 23 through signal conditioning module 21, and host 23 exists
Labview platform exports damper speed characteristic curve, can obtain the characteristic of adaptive transmission control 11.
Fig. 3 is bearing spring performance test methods, is illustrated by taking air spring as an example, steps are as follows for main feature:
A, 12 top of air spring is fixed, under different initial gas pressures, according to certain speed compression air
Spring 12；
B, after gas source feed system 8 makes its air bag internal pressure certain value to the inflation of air spring 12, actuator excitation head 4
An impulse stroke is compressed down from high to air spring 12；
C, pressure sensor 15 and displacement sensor 18 measure the gas pressure and stroke letter of 12 compression process of air spring
Number, data collecting card 20 transmits a signal to host 23 through signal conditioning module 21, is exported by host 23Labview platform
Air spring rigidity characteristic curve.
Fig. 4 is suspension controller performance test methods, is illustrated by taking air suspension controller as an example, specific steps are such as
Under:
A, the motion control signal of target machine 22 is exported by data collecting card 20 to electric oil cylinder driver 19, driving electricity
Dynamic oil cylinder 19 makes the vibration of different frequency and amplitude, so that actuator excitation head 4 be made to apply vibrational excitation；
B, acceleration transducer 13, displacement sensor 18, force snesor 15 receive the data of 12 different conditions of air spring,
Each sensor passes through data collecting card 20 for data feedback to host 23, by showing each biography on host 23Labview platform
Sensor data；
C, Suspension control development board 24 judges that suspension moves whether stroke surpasses according to the signal of acquisition using setting value as target value
Permissible value is crossed, if exceeded, Suspension control development board 24 issues different pulse signal driving stepper motors 10, to change vibration damping
The damping of device 11 and the rigidity of air spring 12 guarantee that spring carried mass analog module 14 and 9 component of unsprung mass analog module are in
Suitable position, it is ensured that control stability index, if suspension moves vibration of the stroke without departing from permissible value, to spring carried mass component 9
Dynamic acceleration signal sampling.
Fig. 5 is the experimental data post-processing based on data mining, the specific steps are as follows:
A, it by the collected signal of sensor in each experimentation, is stored in the electronic document of host, as number
According to the data source of excavation；
B, the valid data are pre-processed using signal conditioning module 21, including collected data is gone
Noise, filtering processing, signal amplification and invalid data is deleted, it will treated that data are stored in host 23Labview puts down
In the data buffer area of platform；
C, using the image display module of host 23Labview platform, the array of data that data prediction is obtained is passed through
Waveform diagram control is patterned display；
D, the path of file destination is inputted by user, the signal of acquisition is distinctive with host 23Labview platform
One key of tdms file format saves in a hard disk, can also save the data in database, is convenient for later analysis or processing.
Claims (10)
1. a kind of vehicle suspension system multifunctional testing platform, it is characterised in that: including suspension test-bed and TT&C system；It is outstanding
Frame experimental stand includes rack ontology, the electric oil cylinder being connected with rack ontology (3) and spring carried mass analog module (14) and electricity
The connected actuator excitation head (4) in the top of dynamic oil cylinder (3), the pallet (5) being connected with actuator excitation head (4) and pallet (5)
The wheel stiffnesses module that is fixedly connected, the unsprung mass analog module (9) being connected with wheel stiffnesses module are simulated with unsprung mass
Stepper motor (10), the gas source feed system (8) connected above module (9)；TT&C system is included in spring carried mass component (14)
The fixed acceleration sensor in top, the displacement sensor (18) of fixation between nonspring carried mass component (9) and pallet (5),
Force snesor (15) is fixed on air spring (12) upper end, and data collecting card (20) is passed with acceleration sensor (13), displacement respectively
Sensor (18), force snesor (15) are connected, electric oil cylinder (3), electric oil cylinder driver (19), data collecting card (20), mesh
Mark machine (22), Suspension control development board (24), host (23) are sequentially connected.
2. vehicle suspension system multifunctional testing platform according to claim 1, it is characterised in that: suspension experimental stand exists
Test object is installed, the object includes suspension damper, suspension bullet between pallet (5) and spring carried mass analog module (14)
Spring, single branch suspension etc., have the performances such as test damper, air spring, helical spring, automobile suspension system and suspension controller
Function.
3. vehicle suspension system multifunctional testing platform according to claim 1, it is characterised in that: rack ontology includes iron
Floor (1), gantry type frame (2), bracket (16) and sliding block (17), gantry type frame (2) are fixed by bolt and iron floor (1)
Connection, bracket (16) both ends are installed on sliding block (17), and sliding block (17) is installed on gantry type frame (2).
4. vehicle suspension system multifunctional testing platform according to claim 2, it is characterised in that: the planer-type frame
Frame (2) includes two columns, line slideway auxiliary, linear ball bearings, is connect on the inside of column with line slideway auxiliary, line slideway auxiliary
It is bolted and fixed with linear roller bearing, sliding block (17) is installed on linear roller bearing.
5. vehicle suspension system multifunctional testing platform according to claim 2, it is characterised in that: spring carried mass simulates mould
Block (14) is composed spring carried mass component by quality mass block of different sizes, and the upper end is bolted and fixed in branch
On frame (16)；It can be with simulated automotive in zero load, semi-load, fully loaded and Arbitrary Loads operating condition by increase and decrease mass block；Unsprung mass mould
Quasi- module (9) are composed non-spring quality component by quality mass block of different sizes, can be simulated not by increasing and decreasing mass block
With the unsprung mass of vehicle automobile.
6. wheel stiffnesses module according to claim 2, it is characterised in that: four helical springs (7) are composed, and pass through
The combination of different rigidity of helical spring can simulate the automobile tire of different model, be installed on nonspring carried mass component (9) and support
Between disk (5).
7. a kind of method for carrying out automobile suspension system test based on test platform described in claim 1, it is characterised in that packet
Include following steps:
A, it is tested automotive suspension and is installed on suspension test-bed, the motion control signal of target machine (22) passes through data collecting card
(20) output is given electric oil cylinder driver (19), and the vibration of driving electric oil cylinder (3) output different frequency and amplitude, the vibration makes
Actuator excitation head (4) applies vibrational excitation, motivates unsprung mass analog module (9) vertical vibration；
B, the vibration of electric oil cylinder (3) passes to bracket (16) and spring carried mass mould by air spring (12) and damper (11)
Quasi- module (14), vibrate up and down spring carried mass analog module (14) vertically along the sliding block (17) at both ends；
C, received signal is transmitted to data acquisition by acceleration transducer (13), displacement sensor (18), force snesor (15)
Block (20), data collecting card (20) is shown through giving signal transmitting to host (23) by the Labview platform of host (23)
Each sensing data obtains spring carried mass analog module (14) vertical acceleration, suspension moves stroke and unsprung mass analog module
(9) signals such as acceleration.
8. a kind of method for carrying out damper test based on test platform described in claim 1, it is characterised in that including following
Step:
A, damper (11) are tested to be installed between the pallet of suspension test-bed and spring carried mass analog module (14), make it only
Movement can be generated by the vibration of actuator excitation head (4)；
B, the control signal of target machine (22) is given electric oil cylinder driver (19) by data collecting card (20) output, drives electronic
Oil cylinder (19) exports the vibration of different frequency and amplitude, so that actuator excitation head (4) be made to apply vibrational excitation；
C, actuator excitation head (4) acts on damper (11), acceleration transducer (13), displacement sensor (18), power sensing
Device (15) receives the signal that damper (11) are generated in different conditions, and data collecting card (20) is by signal transmitting to host
(23), damper (11) speed characteristic curve is exported on Labview platform.
9. it is a kind of based on test platform described in claim 1 carry out air spring test method, it is characterised in that including with
Lower step:
A, be tested air spring be installed on suspension test-bed between pallet and spring carried mass analog module (14), gas source confession
It is inflated to system (8) to air spring (12)；
B, actuator excitation head (4) compresses an impulse stroke to air spring (12) from the bottom up；
C, pressure sensor (15) and displacement sensor (18) measure the gas pressure and stroke of air spring (12) compression process
Signal, data collecting card (20) give signal transmitting host (23), and the real-time delivery air spring rate in TT&C software interface is special
Property.
10. a kind of method for carrying out suspension controller test based on test platform described in claim 1, it is characterised in that including
Following steps:
A, host establishes a quarter automobile suspension system model under Simulink environment, using Real-
Control strategy and car model are generated Standard Control Procedure C code by TimeWorkshop, are generated by compiler executable
Program is downloaded in target machine or Suspension control development board by data line；
B, power on, electric oil cylinder driver (19) drives electric oil cylinder (3) to start work, makes actuator excitation head to automobile
Suspension applies excitation；
C, data collecting card (20) acquires the letter of acceleration transducer (13), displacement sensor (18) and force snesor (15) in real time
Number, data are conveyed to host (23) by data line, TT&C software interface can be with each signal of real-time display；
D, after Suspension control development board control (24) signal receives sensor signal, starting control program is calculated, is judged
And decision, it generates control instruction and is conveyed to automotive suspension executing agency, adjusted in real time；
E, test result is handled, whether analysis suspension property meets design requirement, if not satisfied, return step a modification control plan
Slightly, it regenerates control program and carries out Secondary energy test, until meeting the requirements.
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| CN110455658A (en) * | 2019-08-16 | 2019-11-15 | 华东理工大学 | A kind of dynamic load mark test method for metal material |
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