CN109765063A - A kind of commercial-vehicle cab suspension arrangement Optimum Experiment device and its optimization method - Google Patents
A kind of commercial-vehicle cab suspension arrangement Optimum Experiment device and its optimization method Download PDFInfo
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- CN109765063A CN109765063A CN201910179080.4A CN201910179080A CN109765063A CN 109765063 A CN109765063 A CN 109765063A CN 201910179080 A CN201910179080 A CN 201910179080A CN 109765063 A CN109765063 A CN 109765063A
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Abstract
The invention discloses a kind of commercial-vehicle cab suspension arrangement Optimum Experiment device and its optimization methods, described device includes pedestal, pedestal is equipped with the one group of displacement excitation being arranged symmetrically movement device, displacement excitation acts the one end of device upward and is equipped with suspension inclination-angle regulating device, commercial-vehicle cab is placed in above suspension inclination-angle regulating device, the signal pickup assembly connecting with terminal is electrically connected by signal acquisition route with driver's cabin, and terminal acts device with displacement excitation by control signal output line road, suspension inclination-angle regulating device is connect.This installation cost is low, setting is simple, Yi Shixian.The present invention discloses commercial-vehicle cab suspension arrangement optimization method, this method can quickly obtain accurate commercial-vehicle cab suspension arrangement optimum results.
Description
Technical field
The present invention relates to commercial-vehicle cab suspension, especially a kind of commercial-vehicle cab suspension arrangement Optimum Experiment device
And its optimization method.
Background technique
With socio-economic development, the usage amount of commercial vehicle increases year by year, and ride comfort has become vehicle technology level
Important evaluation criterion, user is also to the automobile ride of commercial vehicle it is also proposed that requirements at the higher level.Cab mounting vibration isolation technique
There is important influence to commercial vehicle ride comfort, but major commercial vehicle manufacturer passes through test to flat in automobile research at present
Pliable to optimize, the methods of such as replacement suspension, change suspension setting angle, a small amount of test may not be able to be tied preferably
Fruit, test have blindness, cause ride comfort optimizing cycle long, at high cost.The R&D institutions such as colleges and universities multi-pass is crossed software and is managed
Optimize by the Vibration Simulation of aspect, lacks practical connection.
Summary of the invention
The purpose of the present invention is in view of the deficiencies of the prior art, and provide a kind of commercial-vehicle cab suspension arrangement optimization examination
Experiment device and its optimization method.This installation cost is low, setting is simple, and Yi Shixian, this method can quickly obtain accurate quotient
With vehicle cab mounting layout optimization result.
Realizing the technical solution of the object of the invention is:
A kind of commercial-vehicle cab suspension arrangement Optimum Experiment device, including pedestal, pedestal are equipped with one group and are arranged symmetrically
Displacement excitation act device, displacement excitation acts device one end upward and is equipped with suspension inclination-angle regulating device, and commercial-vehicle cab is set
Above suspension inclination-angle regulating device, the signal pickup assembly connecting with terminal passes through signal acquisition route and driver's cabin
Electrical connection, terminal acts device with displacement excitation by control signal output line road, suspension inclination-angle regulating device is connect.
The effect of the displacement excitation movement device is: according to the displacement excitation signal offer of terminal output and real vehicle
The same displacement excitation that cab mounting is subject to when driving.
The suspension inclination-angle regulating device includes supporter, extrusome and suspension, and three is bolted, supporter
It fastens between extrusome, is moderately fastened between supporter and cab bottom completely, rotate driver's cabin can around bolt axis,
It is moderately fastened between extrusome and driver's cabin, rotate driver's cabin can around bolt axis, extrusome is bolted on displacement
Excitation acts on device, and motor, gear are housed on extrusome, for controlling rack gear telescopic rod, to reach change suspension driver's cabin
The purpose at inclination angle.
The driver's cabin is equipped with fixed bracket and seat, and fixed bracket is for connecting commercial-vehicle cab and suspension inclination angle
Change device；
Institute's signal pickup assembly is equipped with vibration acceleration sensor, and vibration acceleration sensor is fixed on the seat of driver's cabin
On；
The extrusome includes flexible ontology, motor, gear and the telescopic rod with rack gear, and motor, which is welded in, stretches this
On body, shaft end is equipped with the gear being engaged with rack.
Signal processing software, optimization software are equipped in the terminal, signal processing software passes through for handling
Signal acquisition route is transmitted to the vibration acceleration signal of computer, calculates seat respectively to vibration acceleration frequency weighting root mean square
Value, to calculate optimization object function, optimization software is for controlling cab mounting mounted angle, optimizing iteration.
Using the optimization method of above-mentioned commercial-vehicle cab suspension arrangement Optimum Experiment device, include the following steps:
1) establish target commercial vehicle oscillatory differential equation: establishing target commercial vehicle mechanical model, the model include seat,
Driver's cabin, cab mounting, second-class chassis, chassis suspension, nonspring carried mass, wheel, wherein front-wheel, rear-wheel and rear-wheel lower end
It contacting road surface, upper end and connects nonspring carried mass, chassis suspension lower end is connected with nonspring carried mass, upper end is connected with second-class chassis,
Cab mounting lower end is connected with second-class chassis, upper end is connected with driver's cabin, there is seat in driver's cabin, driver be located at seat it
On, the meaning of target commercial vehicle mechanics parameter, mass parameter and geometric parameter such as the following table 1 institute in target commercial vehicle mechanical model
Show:
Table 1
It is established shown in the half vehicle eight degrees of freedom traveling vertical vibration differential equation such as formula (1) according to each parameter:
2) target commercial vehicle vibration calculating simulation model is constructed, displacement excitation is generated and acts device displacement excitation signal；
According to the half vehicle eight degrees of freedom traveling vertical vibration differential equation that step 1) is established, using MATLAB/
Simulink software constructs target commercial vehicle vertical vibration phantom, derivative ac-tion in the displacement signal of suspension, as
Displacement excitation acts device displacement excitation signal；
3) it establishes the cab mounting based on ride comfort and arranges assay optimization objective function:
According to seat x to vibration acceleration frequency weighting root-mean-square value awx, y is to vibration acceleration frequency weighting root-mean-square value
awy, z is to vibration acceleration frequency weighting root-mean-square value awzEstablish objective function, i.e. formula (2):
Each root-mean-square value can be obtained by formula (3):
In formula, GaIt (f) is to chair top respectively to acceleration time domain course atCarry out the power spectral density letter that spectrum analysis obtains
Number；W (f) is frequency weighting function, is obtained respectively by formula (4), (5), (6)::
X is to for formula (4):
Y is to for formula (5):
Z is to for formula (6):
4) initialization suspension setting angle: terminal will control signal according to the initial suspension setting angle of setting and pass
To motor, the initial elongation amount of motor control telescopic rod, to initialize the purpose of suspension setting angle；
5) calculating target function: displacement excitation acts device and carries out displacement excitation, and signal sampler acquisition signal is simultaneously transferred to
Terminal, computer carry out Fourier transformation to signal to each first, are then found out according to formula (3) each equal to acceleration
Root value finally calculates objective function according to formula (2)；
6) acquisition judges optimization object function fitness value using ISIGHT software, saves optimal value；
7) judge the number of iterations whether setting value；
8) if so, exporting optimal suspension setting angle；
9) if it is not, then changing suspension setting angle, step 5) -9 is repeated), it is iterated to obtain suspending optimal established angle
Degree.
This installation cost is low, setting is simple, and Yi Shixian, it is outstanding that this method can quickly obtain accurate commercial-vehicle cab
Set layout optimization result.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of device in embodiment；
Fig. 2 is that mounted angle regulating device schematic diagram is suspended in embodiment；
Fig. 3 is extrusome schematic diagram in embodiment；
Fig. 4 is arrangement schematic diagram of the fixed bracket of driver's cabin on optimization device in embodiment；
Fig. 5 is vibration acceleration sensor mounting arrangements schematic diagram in embodiment；
Fig. 6 is target commercial vehicle mechanical model schematic diagram in embodiment；
Fig. 7 is that cabin front suspension sets the displacement excitation signal schematic representation being subject in embodiment；
Fig. 8 is the displacement excitation signal schematic representation that driving cab rear suspension is subject in embodiment；
Fig. 9 is optimization method implementation process diagram in embodiment.
Specific embodiment
The content of present invention is further elaborated with reference to the accompanying drawings and examples, but is not limitation of the invention.
Embodiment:
A kind of commercial-vehicle cab suspension arrangement Optimum Experiment device, including pedestal 9, pedestal 9 are equipped with one group of symmetrical cloth
The displacement excitation movement device 1 set, displacement excitation act the one end of device 1 upward and are equipped with suspension inclination-angle regulating device 2, and commercial vehicle drives
Room 3 is placed in 2 top of suspension inclination-angle regulating device, and the signal pickup assembly 6 connecting with terminal 8 passes through signal acquisition route
4 are electrically connected with driver's cabin 3, and terminal 8 acts device 1, suspension inclination angle tune by control signal output line road 5 and displacement excitation
Regulating device 2 connects, as shown in Figure 1.
The effect of the displacement excitation movement device 1 is: being provided according to the displacement excitation signal that terminal 8 exports and real
The excitation of the vehicle same displacement that cab mounting is subject to when driving.
The suspension inclination-angle regulating device includes supporter, extrusome and suspension, and three is bolted, supporter
It is fastened completely between extrusome, supporter and driver's cabin moderately fasten between 3 bottom, turn driver's cabin 3 can around bolt axis
It is dynamic, it is moderately fastened between extrusome and driver's cabin 3, rotate driver's cabin 3 can around bolt axis, extrusome is bolted on
Displacement excitation acts on device 1, as shown in Fig. 2, motor, gear are equipped on extrusome, for controlling rack gear telescopic rod, motor welding
In on flexible ontology, shaft end is equipped with the gear being engaged with rack, as shown in figure 3, changing suspension 3 inclination angle of driver's cabin to reach
Purpose；
The driver's cabin 3 is equipped with fixed bracket and seat, and fixed bracket inclines for connecting commercial-vehicle cab with suspension
Angle changes device, as shown in Figure 4；
Institute's signal pickup assembly 6 is equipped with vibration acceleration sensor, and vibration acceleration sensor is fixed on the seat of driver's cabin 3
On chair, as shown in Figure 5；
Signal processing software, optimization software are equipped in the terminal 8, signal processing software passes through for handling
Signal acquisition route 4 is transmitted to the vibration acceleration signal of computer, and it is respectively square to vibration acceleration frequency weighting to calculate seat
Root, to calculate optimization object function, optimization software suspends mounted angle, optimizing iteration for controlling driver's cabin 3.
Referring to Fig. 9, using the optimization method of above-mentioned commercial-vehicle cab suspension arrangement Optimum Experiment device, including walk as follows
It is rapid:
1) it establishes target commercial vehicle oscillatory differential equation: establishing target commercial vehicle mechanical model, as shown in figure 8, the mould
Type includes seat, driver's cabin, cab mounting, second-class chassis, chassis suspension, nonspring carried mass, wheel, wherein front-wheel, rear-wheel
1 connect nonspring carried mass with the lower end in contact road surface of rear-wheel 2, upper end, and chassis suspension lower end is connected with nonspring carried mass, upper end and two
Class chassis is connected, and cab mounting lower end is connected with second-class chassis, upper end is connected with driver's cabin, there is seat in driver's cabin, drives
Member is located on seat, and target commercial vehicle mechanics parameter in target commercial vehicle mechanical model, mass parameter and geometric parameter contain
It is adopted as shown in table 1 below:
Table 1
It is established shown in the half vehicle eight degrees of freedom traveling vertical vibration differential equation such as formula (1) according to each parameter:
2) target commercial vehicle vibration calculating simulation model is constructed, displacement excitation is generated and acts device displacement excitation signal；
According to the half vehicle eight degrees of freedom traveling vertical vibration differential equation that step 1) is established, using MATLAB/
Simulink software constructs target commercial vehicle vertical vibration phantom, derivative ac-tion in the displacement signal of suspension, as
Displacement excitation acts 1 displacement excitation signal of device, and displacement excitation signal is as shown in Figure 7, Figure 8；
3) it establishes the cab mounting based on ride comfort and arranges assay optimization objective function:
According to seat x to vibration acceleration frequency weighting root-mean-square value awx, y is to vibration acceleration frequency weighting root-mean-square value
awy, z is to vibration acceleration frequency weighting root-mean-square value awzEstablish objective function, i.e. formula (2):
Each root-mean-square value can be obtained by formula (3):
In formula, GaIt (f) is to chair top respectively to acceleration time domain course atCarry out the power spectral density letter that spectrum analysis obtains
Number；W (f) is frequency weighting function, is obtained respectively by formula (4), (5), (6)::
X is to for formula (4):
Y is to for formula (5):
Z is to for formula (6):
4) initialization suspension setting angle: terminal 8 will control signal according to the initial suspension setting angle of setting
Motor, the initial elongation amount of motor control telescopic rod are passed to, to initialize the purpose of suspension setting angle；
5) calculating target function: displacement excitation acts device 1 and carries out displacement excitation, and signal sampler acquisition signal is simultaneously transferred to
Terminal 8, computer 8 carry out Fourier transformation to signal to each first, are then found out according to formula (3) each to acceleration
Root-mean-square value finally calculates objective function according to formula (2)；
6) acquisition judges optimization object function fitness value using ISIGHT software, saves optimal value；
7) judge the number of iterations whether setting value；
8) if so, exporting optimal suspension setting angle；
9) if it is not, then changing suspension setting angle, step 5) -9 is repeated), it is iterated to obtain suspending optimal established angle
Degree.
Claims (5)
1. a kind of commercial-vehicle cab suspension arrangement Optimum Experiment device, which is characterized in that including pedestal, pedestal is equipped with one group
The displacement excitation movement device being arranged symmetrically, displacement excitation act the one end of device upward and are equipped with suspension inclination-angle regulating device, commercial vehicle
Driver's cabin is placed in above suspension inclination-angle regulating device, and the signal pickup assembly connecting with terminal passes through signal acquisition route
It is electrically connected with driver's cabin, terminal acts device, suspension tilt adjustment dress by control signal output line road and displacement excitation
Set connection.
2. commercial-vehicle cab suspension arrangement Optimum Experiment device according to claim 1, which is characterized in that described is outstanding
Setting inclination-angle regulating device includes supporter, extrusome and suspension, and three is bolted, between supporter and extrusome completely
Fastening, moderately fastens between supporter and cab bottom, rotate driver's cabin can around bolt axis, extrusome and driver's cabin it
Between moderately fasten, rotate driver's cabin can around bolt axis, extrusome be bolted on displacement excitation movement device on, stretch
Motor, gear are housed on body.
3. commercial-vehicle cab suspension arrangement Optimum Experiment device according to claim 1, which is characterized in that institute's signal is adopted
Acquisition means are equipped with vibration acceleration sensor, and vibration acceleration sensor is fixed on the seat of driver's cabin.
4. commercial-vehicle cab suspension arrangement Optimum Experiment device according to claim 2, which is characterized in that described flexible
Body includes that flexible ontology, motor, gear and the telescopic rod with rack gear, motor are welded on flexible ontology, shaft end be equipped with
Rack gear meshed gears.
5. right to use 1- weighs the optimization method of commercial-vehicle cab suspension arrangement Optimum Experiment device described in 5 any one, special
Sign is, includes the following steps:
1) it establishes target commercial vehicle oscillatory differential equation: establishing target commercial vehicle mechanical model, the model includes seat, drives
Room, cab mounting, second-class chassis, chassis suspension, nonspring carried mass, wheel, wherein end in contact under front-wheel, rear-wheel and rear-wheel
Road surface, upper end connect nonspring carried mass, and chassis suspension lower end is connected with nonspring carried mass, upper end is connected with second-class chassis, drive
Lower end is connected with second-class chassis, upper end is connected with driver's cabin for room suspension, there is seat in driver's cabin, and driver is located on seat,
The meaning of mechanics parameter, mass parameter and geometric parameter is as shown in table 1 in target commercial vehicle mechanical model:
Table 1
It is established shown in the half vehicle eight degrees of freedom traveling vertical vibration differential equation such as formula (1) according to each parameter:
2) target commercial vehicle vibration calculating simulation model is constructed, displacement excitation is generated and acts device displacement excitation signal；
It is soft using MATLAB/Simulink according to the half vehicle eight degrees of freedom traveling vertical vibration differential equation that step 1) is established
Part, constructs target commercial vehicle vertical vibration phantom, and derivative ac-tion is dynamic as displacement excitation in the displacement signal of suspension
Make device displacement excitation signal；
3) it establishes the cab mounting based on ride comfort and arranges assay optimization objective function:
According to seat x to vibration acceleration frequency weighting root-mean-square value awx, y is to vibration acceleration frequency weighting root-mean-square value awy、z
To vibration acceleration frequency weighting root-mean-square value awzEstablish objective function, i.e. formula (2):
Each root-mean-square value can be obtained by formula (3):
In formula, GaIt (f) is to chair top respectively to acceleration time domain course atCarry out the power spectral density function that spectrum analysis obtains；w
(f) it is frequency weighting function, is obtained respectively by formula (4), (5), (6):
X is to for formula (4):
Y is to for formula (5):
Z is to for formula (6):
4) initialization suspension setting angle: terminal passes to electricity for signal is controlled according to the initial suspension setting angle of setting
Machine, the initial elongation amount of motor control telescopic rod, to initialize the purpose of suspension setting angle；
5) calculating target function: displacement excitation acts device and carries out displacement excitation, and signal sampler acquisition signal is simultaneously transferred to calculating
Machine terminal, computer carry out Fourier transformation to signal to each first, are then found out according to formula (3) each to acceleration-root-mean square
Value, finally calculates objective function according to formula (2)；
6) optimization object function fitness value is judged using ISIGHT software, saves optimal value；
7) judge the number of iterations whether setting value；
8) if so, exporting optimal suspension setting angle；
9) if it is not, then changing suspension setting angle, step 5) -9 is repeated), it is iterated to obtain suspending optimal setting angle.
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Cited By (1)
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| CN113295426A (en) * | 2021-03-26 | 2021-08-24 | 中国第一汽车股份有限公司 | Bench test method for evaluating vibration comfort of automobile seat |
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