CN105973613A - Braking judder rack diagnosis device and method thereof - Google Patents
Braking judder rack diagnosis device and method thereof Download PDFInfo
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- CN105973613A CN105973613A CN201610269494.2A CN201610269494A CN105973613A CN 105973613 A CN105973613 A CN 105973613A CN 201610269494 A CN201610269494 A CN 201610269494A CN 105973613 A CN105973613 A CN 105973613A
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- brake
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
Abstract
The invention relates to a braking judder rack diagnosis device and a method thereof. A crawler-type four-wheel driving platform has three selective driving modes of front wheel driving, rear wheel driving and four-wheel driving. A sensor and a signal transmission wire harness comprise a wheel speed sensor, displacement sensors, a force sensor, a pressure sensor and three-dimensional acceleration sensors. The wheel speed sensor is used to collect speed information when brake judder is generated. The displacement sensors are installed on two sides of brake discs and are used to test change conditions of brake discs DTV and SRO under a vehicle-mounted state. The force sensor is used to record a brake pedal force. The pressure sensor is used to collect brake hydraulic pressure. The three-dimensional acceleration sensors are installed on a steering wheel, a brake pedal, an underbody, a lower swing arm, brake callipers, a steering knuckle and a steering tie rod and are used to collect a judder condition of each portion of a vehicle during a brake process. Data acquisition and analysis equipment collects and analyzes signals transmitted by each sensor and displays on a display so as to carry out research, analysis and data accumulation.
Description
Technical field
The present invention relates to a kind of car braking jitterbug monitor station rack device, especially a kind of detection is made under vehicle-mounted state
The undulating value of the changing value of Moving plate DTV and SRO, brake force and braking moment, the vibration of steering wheel, brake pedal, vehicle body etc. adds
Speed etc., thus solve the diagnostic equipment of braking jitterbug efficiently.
Background technology
Braking shake refers to that vehicle is implemented steering wheel, brake pedal, seat and vehicle body occur when braking in the process of moving
Jitter phenomenon.Based on current research, braking shake is produced by drag angle assembly, is then passed through suspension subsystem, turns to son
System, the absorption of brake piping or amplification are delivered to driving cabin, thus form the vibration sense of driver.Therefore braking shake event
Mainly caused by the end face run-out (SRO) of brake disc thickness poor (DTV) and brake disc from the point of view of hindering from vibration source, experimental study
Show, when DTV is more than 60 μm more than 20 μm, SRO, braking jitter phenomenon in various degree to be produced.
Research to braking shake at present is concentrated mainly on vibration source and bang path, and research mode mainly has theory to grind
Study carefully, experimental study and simulation analysis.Theoretical research mainly carries out force analysis to car load or drag angle, learns brake force and system
The fluctuation of kinetic moment is the immediate cause causing braking shake.Experimental study includes bench test and vehicle road test, wherein
The performances such as the mode of each parts of drag angle, rigidity are mainly analyzed by bench test；Vehicle road test can be from whole
Order relation between chattering frequency and the speed of the angle research direction dish of car, brake pedal, vehicle body etc., can also adopt simultaneously
Brake disc thickness poor (DTV) and the situation of change of end face run-out (SRO) in collection braking dither process.On the one hand simulation analysis is right
Brake disc carries out heat and analyzes and model analysis, is on the other hand that car load is carried out simulation analysis kinetically, from braking shake
The angle of bang path is studied.
Although existing vehicle road test equipment can gather the various information needed of vehicle under on-position, but simultaneously
Also limited by factors such as test site, equipment debugging, drivers so that experimentation cost and difficulty are greatly increased.It addition, it is whole
Car actual road test is also affected by weather, owing to the various sensors used in equipment are precision element, uses meeting in the rainy day
Affect its degree of accuracy even to damage.The stand arrangement of the most a set of simulation vehicle road test is a need for, and this set stand sets
The standby pluses and minuses integrating each actual road test equipment both at home and abroad improve optimization, can more comprehensively analyze braking shake former
Cause, thus solve braking jitter problem fast and effectively.
Summary of the invention
It is an object of the invention to provide a kind of braking shake stand diagnostic equipment solving to brake jitter problem and method, should
Device and method can simulate vehicle road test, thus is led due to the problem such as weather, personnel during overcoming actual road test
The problems such as the test result caused is inaccurate, and experimentation cost is expensive, can also be accurately positioned vibration source simultaneously, accelerate product development, have
Effect economizes on resources.
For achieving the above object, the technical scheme is that a kind of braking shake stand diagnostic equipment, including crawler type
Four-wheel drive platform, sensor and signal transmission wire harness, data acquisition and analytical equipment, described crawler type four-wheel drive platform is altogether
Front-wheel drive, rear wheel drive, three kinds of selectable drive patterns of four-wheel drive, described sensor and signal transmission wire harness is had to include
Wheel speed sensors, displacement transducer, force transducer, pressure transducer, three-dimensional acceleration transducer, wheel speed sensors detection wheel
Rotating speed, is used for gathering speed information when braking shake occurs；Displacement transducer is arranged on the both sides of brake disc, is used for measuring car
Brake disc DTV and the situation of change of SRO under load state；Force transducer is used for recording brake pedal force, to control severity of braking；Pressure
Force transducer is arranged at air brake hose nipple, is used for gathering brake fluid pressure；Three-dimensional acceleration transducer is arranged on steering wheel, system
On dynamic pedal, underbody, lower swing arm, brake caliper, knuckle, track rod, it is used for gathering vehicle in braking procedure each
The jitter conditions of individual part；Described data acquisition and analytical equipment collection are also analyzed the signal transmitted by each sensor and show
On display, for deliberation, analysis and data accumulation.
Described crawler type four-wheel drive platform include the driving motor of crawler belt, testing stand, test vehicle, crawler belt 4, gather and
Processing signal PC terminal, equipped with crawler belt below testing stand, crawler belt is connected with the driving motor of crawler belt, and testing stand is placed above test
Vehicle and collection and process signal PC terminal.
After six institute's displacement sensors are rack-mount, across the both sides in brake disc, for measuring braking respectively
Outside dish, middle, the thickness difference of inner side and end face run-out amount.
Described wheel speed sensors, displacement transducer, force transducer, pressure transducer, wheel speed sensors pass through DASP respectively
Data collecting card connects PC terminal, and described three-dimensional acceleration transducer connects PC by charge amplifier and DASP data collecting card
Terminal.
A kind of diagnostic method using the braking shake stand diagnostic equipment, first starts the braking shake stand diagnostic equipment,
Making crawler belt move under the effect driving motor, test vehicle is by setting operating mode traveling under the driving of crawler belt, and crawler belt is given simultaneously
Give the input of vehicle road unevenness；When test vehicle reaches to specify speed, disconnect and drive motor that crawler belt is dallied, and give
Test vehicle brake force, meanwhile, is started data acquisition, is shown by display, intuitively by the signal that various sensor acquisition are come
Analysis braking jitterbug.
The invention has the beneficial effects as follows:
Compared with existing actual road test device, assembly of the invention can simultaneously collecting vehicle wheel speed, brake disc DTV and
The signals such as the fluctuation situation of the situation of change of SRO, brake force and braking moment, can more comprehensively analyze braking shake former
Cause, thus solve braking jitter problem fast and effectively.
Accompanying drawing explanation
Fig. 1 is the braking shake stand diagnostic equipment structural representation of the present invention；
Fig. 2 is crawler type four-wheel drive platform top view；
Fig. 3 is crawler type four-wheel drive platform side view；
Fig. 4 is data acquisition and analytical equipment theory diagram；
Fig. 5 is displacement transducer point layout figure；
Fig. 6 is the left view of Fig. 5；
Fig. 7 is the workflow diagram of the braking shake stand diagnostic equipment of the present invention.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
As shown in Figures 1 to 7, the shake of the braking in the present invention stand diagnostic equipment includes three parts, respectively crawler belt altogether
Formula four-wheel drive platform, sensor and signal transmission wire harness, data acquisition and analytical equipment.
Such as Fig. 1, shown in 2,3, crawler type four-wheel drive platform is used for simulated roadway, total front-wheel drive, rear wheel drive, four
Three kinds of drive patterns of wheel drive can select altogether, to adapt to the vehicle of different driving pattern.According to the road surface in highway in China grade
Roughness design track surface is to obtain result of the test more accurately.Crawler type four-wheel drive platform includes the driving electricity of crawler belt
Machine 1, testing stand 2, test vehicle 3, crawler belt 4, gathering and process signal PC terminal 5, testing stand 2 is below equipped with crawler belt 4, crawler belt 4
Being connected with the driving motor 1 of crawler belt, testing stand 2 is placed above test vehicle 3 and gathers and process signal PC terminal 5.
Sensor and signal transmission wire harness include wheel speed sensors, displacement transducer, force transducer, pressure transducer, three
To acceleration transducer.Wheel speed sensors detection vehicle wheel rotational speed, is used for gathering speed information when braking shake occurs；Displacement passes
Sensor is arranged on the both sides of brake disc, is used for measuring brake disc DTV and the situation of change of SRO under vehicle-mounted state；Force transducer is used
Record brake pedal force, to control severity of braking；Pressure transducer is arranged at air brake hose nipple, is used for gathering brake fluid
Pressure；Three-dimensional acceleration transducer may be mounted at steering wheel, brake pedal, underbody, lower swing arm, brake caliper, knuckle,
On the parts such as track rod, it is used for gathering the jitter conditions of vehicle various piece in braking procedure.Data acquisition and analysis
Equipment is used for gathering and analyzing the signal transmitted by sensor and show over the display, for studying later, and analyzed and data
Accumulation.
As shown in Figure 4, described wheel speed sensors, displacement transducer, force transducer, pressure transducer, wheel speed sensors divide
Tong Guo not connect PC terminal by DASP data collecting card, described three-dimensional acceleration transducer passes through charge amplifier and DASP data acquisition
Truck connects PC terminal.DASP data collecting card is used for gathering the signal that sensor transmits, and analyzes software pair by computer data
Data are analyzed, and are shown over the display by final result.
Compared with existing actual road test device, assembly of the invention can simultaneously collecting vehicle wheel speed, brake disc DTV and
The signals such as the fluctuation situation of the situation of change of SRO, brake force and braking moment.Sensor, the signal gathered and measuring point cloth thereof
Put as shown in table 2.1.
Table 2.1 sensor, the signal gathered and point layout thereof
Although pressure transducer only acquires brake fluid pressure, brake force can be calculated respectively according to formula 2.1,2.2
And braking moment, therefore can clearly observe brake fluid pressure, brake force and braking moment during the analysis in later stage
Fluctuation situation.
F=p A μ (2.1)
T=p A μ r (2.2)
Wherein, F is brake force (N)；
T is braking moment (Nm)；
P is brake pressure (Pa)；
A is contact area (m2)；
μ is coefficient of friction；
R is frictional force equivalent action radius (m).
Such as Fig. 5, shown in 6, after six displacement transducers 7 are arranged on support 8, across the both sides in brake disc 8, it is used for dividing
Not Ce Liang outside brake disc 9, middle 10, the thickness difference of inner side 11 and end face run-out amount.
As it is shown in fig. 7, use the diagnostic workflow of the braking shake stand diagnostic equipment of the present invention:
After starting the braking shake stand diagnostic equipment, crawler belt moves under the effect driving motor, and test vehicle is at crawler belt
Driving under by set operating mode travel, simultaneously crawler belt give vehicle road unevenness input.When vehicle reaches to specify speed, disconnected
Driving driving motor makes crawler belt dally, and gives the brake force that vehicle is certain, disconnects while driving motor, starts data acquisition.
The signal that various sensor acquisition are come is shown by display, analyzes braking jitterbug intuitively.
Claims (5)
1. a braking shake stand diagnostic equipment, transmits wire harness, number including crawler type four-wheel drive platform, sensor and signal
According to gathering and analytical equipment, it is characterised in that: described crawler type four-wheel drive platform has front-wheel drive, rear wheel drive, four-wheel
Three kinds of selectable drive patterns, described sensor and signal transmission wire harness is driven to include wheel speed sensors, displacement transducer, power
Sensor, pressure transducer, three-dimensional acceleration transducer, wheel speed sensors detection vehicle wheel rotational speed, it is used for gathering braking shake and sends out
Speed information time raw；Displacement transducer is arranged on the both sides of brake disc, is used for measuring brake disc DTV and SRO under vehicle-mounted state
Situation of change；Force transducer is used for recording brake pedal force, to control severity of braking；Pressure transducer is arranged on air-brake coupling hose
Joint, is used for gathering brake fluid pressure；Three-dimensional acceleration transducer is arranged on steering wheel, brake pedal, underbody, the bottom
On arm, brake caliper, knuckle, track rod, it is used for gathering the jitter conditions of vehicle various piece in braking procedure；Described
Data acquisition and analytical equipment collection are also analyzed the signal transmitted by each sensor and show over the display, for deliberation, point
Analysis and data accumulation.
The braking shake stand diagnostic equipment the most according to claim 1, it is characterised in that: described crawler type four-wheel drive is put down
Platform includes driving motor (1), testing stand (2), test vehicle (3), crawler belt (4), gathering and process signal PC terminal (5), test
Platform (2) is below equipped with crawler belt (4), and crawler belt (4) is connected with driving motor (1), testing stand (2) be placed above test vehicle (3) and
Gather and process signal PC terminal (5).
The braking shake stand diagnostic equipment the most according to claim 1, it is characterised in that: six institute's displacement sensors peaces
After being contained on support, across the both sides in brake disc, for measuring outside brake disc respectively, thickness middle, inner side is poor and holds
Face jerk value.
The braking shake stand diagnostic equipment the most according to claim 1, it is characterised in that: described wheel speed sensors, displacement
Sensor, force transducer, pressure transducer, wheel speed sensors respectively by DASP data collecting card connect PC terminal, described three
PC terminal is connected by charge amplifier and DASP data collecting card to acceleration transducer.
5. the diagnostic method using the arbitrary described braking shake stand diagnostic equipment of claim 1-4, it is characterised in that:
First starting the braking shake stand diagnostic equipment, make crawler belt (4) move under the effect driving motor (1), test vehicle (3) exists
By setting operating mode traveling under the driving of crawler belt (4), crawler belt (4) gives the input of vehicle road unevenness simultaneously；When test vehicle (3)
When reaching to specify speed, disconnect and drive motor (1) that crawler belt (4) is dallied, and give test vehicle (3) brake force, open meanwhile
Beginning data acquisition, is shown the signal that various sensor acquisition are come by display, and analyzes braking jitterbug intuitively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610269494.2A CN105973613A (en) | 2016-04-27 | 2016-04-27 | Braking judder rack diagnosis device and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610269494.2A CN105973613A (en) | 2016-04-27 | 2016-04-27 | Braking judder rack diagnosis device and method thereof |
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| CN105973613A true CN105973613A (en) | 2016-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610269494.2A Pending CN105973613A (en) | 2016-04-27 | 2016-04-27 | Braking judder rack diagnosis device and method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113587790A (en) * | 2021-07-31 | 2021-11-02 | 重庆长安汽车股份有限公司 | Brake disc measuring system and analysis method |
| CN113758719A (en) * | 2020-06-01 | 2021-12-07 | 陕西汽车集团有限责任公司 | Truck driving shake detection device |
| CN113758720A (en) * | 2020-06-01 | 2021-12-07 | 陕西汽车集团有限责任公司 | Truck running jitter detection method |
| CN113834597A (en) * | 2021-10-12 | 2021-12-24 | 中国汽车工程研究院股份有限公司 | Method for measuring and processing data of BTV (brake torque converter) of commercial vehicle disc brake assembly |
| CN114454861A (en) * | 2022-03-04 | 2022-05-10 | 东风汽车集团股份有限公司 | Control system and control method capable of eliminating brake jitter |
| CN116878928A (en) * | 2023-09-07 | 2023-10-13 | 诸城大舜汽车科技有限公司 | Automobile brake detection table |
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Patent Citations (5)
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| JPS62832A (en) * | 1985-06-27 | 1987-01-06 | Akebono Brake Res & Dev Center Ltd | Brake judder testing device |
| JPH05126683A (en) * | 1991-01-29 | 1993-05-21 | Hino Motors Ltd | Brake judder testing device |
| CN102323066A (en) * | 2011-07-27 | 2012-01-18 | 山东理工大学 | Crawler chassis test stand |
| CN103048146A (en) * | 2012-12-21 | 2013-04-17 | 徐州重型机械有限公司 | Multi-axle vehicle brake judder diagnostic device and multi-axle vehicle brake judder diagnostic method |
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Non-Patent Citations (1)
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113758719A (en) * | 2020-06-01 | 2021-12-07 | 陕西汽车集团有限责任公司 | Truck driving shake detection device |
| CN113758720A (en) * | 2020-06-01 | 2021-12-07 | 陕西汽车集团有限责任公司 | Truck running jitter detection method |
| CN113758720B (en) * | 2020-06-01 | 2023-11-24 | 陕西汽车集团股份有限公司 | Truck driving jitter detection method |
| CN113587790A (en) * | 2021-07-31 | 2021-11-02 | 重庆长安汽车股份有限公司 | Brake disc measuring system and analysis method |
| CN113834597A (en) * | 2021-10-12 | 2021-12-24 | 中国汽车工程研究院股份有限公司 | Method for measuring and processing data of BTV (brake torque converter) of commercial vehicle disc brake assembly |
| CN113834597B (en) * | 2021-10-12 | 2024-03-26 | 中国汽车工程研究院股份有限公司 | Measurement and data processing method for BTV of commercial vehicle disc brake assembly |
| CN114454861A (en) * | 2022-03-04 | 2022-05-10 | 东风汽车集团股份有限公司 | Control system and control method capable of eliminating brake jitter |
| CN116878928A (en) * | 2023-09-07 | 2023-10-13 | 诸城大舜汽车科技有限公司 | Automobile brake detection table |
| CN116878928B (en) * | 2023-09-07 | 2023-11-07 | 诸城大舜汽车科技有限公司 | Automobile brake detection table |
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Application publication date: 20160928 |