CN110208012A - A kind of drag chain type coaster active brake control method - Google Patents
A kind of drag chain type coaster active brake control method Download PDFInfo
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- CN110208012A CN110208012A CN201910417171.7A CN201910417171A CN110208012A CN 110208012 A CN110208012 A CN 110208012A CN 201910417171 A CN201910417171 A CN 201910417171A CN 110208012 A CN110208012 A CN 110208012A
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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
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/04—Suspension or damping
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- General Physics & Mathematics (AREA)
- Regulating Braking Force (AREA)
- Braking Systems And Boosters (AREA)
Abstract
The invention discloses a kind of drag chain type coaster active brake control methods, it is realized by coaster active brake control module, coaster active brake control module includes braking system, wheel speed sensors, displacement sensor, master cylinder pressure sensor, outer brake controller, 12V Vehicular accumulator cell, and master cylinder pressure sensor, front-wheel wheel speed sensors, rear suspension displacement sensor, outer brake controller, electronics booster are all powered by 12V Vehicular accumulator cell；Master cylinder pressure sensor, front-wheel wheel speed sensors, rear suspension displacement sensor send master cylinder pressure signal, front-wheel wheel speed signal, rear suspension displacement signal to external brake monitor respectively, and outer brake controller carries out outer brake conditioned signal by CAN line with electronics booster, brake pressure enabling signal, brake pressure value signal, outer brake status signal, stops sending and receiving for power-assisted increase signal.
Description
Technical field
The invention belongs to passenger car bench test field, specifically a kind of drag chain type coaster active brake control method.
Background technique
When suspension system carries out misuse test, need to carry entire vehicle suspension system using coaster.Coaster is by being laid with
Drag chain driving on the ground, when coaster has just passed through beam obstacle, needs at once to brake coaster.Due to this experiment danger
Dangerous coefficient is higher, thus can not by people on coaster hydraulic driving system.Currently used method are as follows: use real vehicle braking system
System, including vacuum booster, vacuum pump, vacuum tube, six-way valve, caliper and brake disc, vacuum booster are driven by electric cylinder,
The power supply system of electric cylinder is mounted on coaster, is braked by people's remote control electric cylinder.This method the problem is that:
First is that electric cylinder weight is big, the meeting of increasing considerably of suspension system unsprung mass is so that test result can not accurate simulation real vehicle weight
Amount；Second is that the signal of remote control is wireless signal, once signal is bad, then coaster can not be braked in time, coaster will be because of
It can not brake and go out drag chain track and cause the accident.
Summary of the invention
In order to solve problem above, the present invention provides a kind of drag chain type coaster active brake control methods.
The technical solution adopted by the present invention are as follows:
A kind of drag chain type coaster active brake control method realizes that coaster is actively by coaster active brake control module
Brake control module include braking system, wheel speed sensors, displacement sensor, master cylinder pressure sensor, outer brake controller,
12V Vehicular accumulator cell, master cylinder pressure sensor, front-wheel wheel speed sensors, rear suspension displacement sensor, outer brake controller,
Electronics booster is all powered by 12V Vehicular accumulator cell；Master cylinder pressure sensor, front-wheel wheel speed sensors, rear suspension displacement pass
Sensor sends master cylinder pressure signal, front-wheel wheel speed signal, rear suspension displacement signal, outer brake to external brake monitor respectively
Controller and electronics booster, which carry out outer brake conditioned signal, brake pressure enabling signal, brake pressure value by CAN line, to be believed
Number, outer brake status signal, stop power-assisted and increase signal sending and receiving.
A kind of drag chain type coaster active brake control method, the mounting means of coaster active brake control module
Are as follows: the suspension system of vehicle is mounted on coaster vehicle frame, and wheel speed sensors are mounted in the knuckle of front-wheel；Displacement sensor is
Stay-supported type displacement sensor, the fixing end of stay-supported type displacement sensor are mounted in the upper suspension of rear suspension, triggering end and rear overhang
Bracket contact on frame traveller；Master cylinder pressure sensor is connected in braking system, and braking system includes electronics booster, six logical
Valve, caliper, brake disc, brake pipe, caliper are fixed on the knuckle of front and back, and brake disc is fixed on hub bearing, and six
Port valve one end is connected to by brake pipe with caliper, and one end is connected to by brake pipe with master cylinder pressure sensor, the other end
It is connected to by brake pipe with the first oil outlet of electronics booster；Master cylinder pressure sensor passes through brake pipe and electronics booster
The connection of second oil outlet；Electronics booster, outer brake controller, 12V Vehicular accumulator cell are fixed on coaster vehicle frame.
A kind of drag chain type coaster active brake control method, comprising the following steps:
Coaster is pushed into ground drag chain, is manually powered on electronics booster, on-test；
Electronics booster is adjusted to outer brake function；
Outer brake controller acquires the displacement signal of the rear suspension displacement sensor of a certain amount of sampled point in real time, is averaged
It is worth the zero point being displaced as rear suspension；
Coaster accelerates to be advanced until velocity-stabilization on drag chain, and when coaster reaches at beam obstacle, coaster is detached from ground
Drag chain, the displacement of coaster rear suspension are continuously increased, when rear suspension displacement is more than a certain value, before outer brake controller acquires in real time
Take turns the wheel speed value of wheel speed sensors；
Outer brake controller calculates brake pressure value according to the wheel speed value of front-wheel；
Outer brake controller issues the instruction of starting brake pressure and needs brake pressure value signal to be achieved, is sent to
Electronics booster；
When electronics booster receives the instruction of starting brake pressure, electronics booster carries out motor power-assisted, and power-assisted
Value is continuously increased；
Pressure sensor acquires master cylinder pressure value signal in real time, when master cylinder pressure force value is greater than brake pressure value, outside system
Movement controller sends the instruction for stopping increasing power-assisted to electronics booster, and electronics booster stops the increase of motor power-assisted；
Wheel speed value persistently reduces, and when being lower than a certain value, electronics booster stops motor power-assisted, and coaster braking is completed, sliding
Vehicle is remain stationary；
It is electric under electronics booster, off-test.
The invention has the benefit that
The present invention is using electronics booster, external sensor, Vehicular accumulator cell instead of the vacuum booster on real vehicle, vacuum
Pump, vacuum pipe assembly, and eliminate the electric cylinder in traditional control method, electric cylinder driving and control unit, have it is small in size,
Light-weight, the characteristics of being easily installed.Since electronics booster brake pressure can carry out soft readjustment according to different wheel speeds,
It avoids coaster and the problem that brake force is insufficient or braking is too quickly occurs, improve the service life of coaster.Letter in this control method
Number only interaction inside coaster active brake control module of the invention, without being interacted with peripheral control unit, therefore it is logical
It is strong with property.Since the signal in this control method is connected by rigid line, signal strength is high, transmission rate is fast, anti-dry
Immunity is good, high reliablity.
Detailed description of the invention
Fig. 1 is coaster active brake control module signal flow diagram of the present invention；
Fig. 2 is control method flow chart of the present invention.
Specific embodiment
Technical solution of the present invention is discussed in detail below in conjunction with attached drawing:
A kind of drag chain type coaster active brake control method is realized, coaster master by coaster active brake control module
Dynamic brake control module includes braking system, wheel speed sensors, displacement sensor, master cylinder pressure sensor, outer brake control
Device, 12V Vehicular accumulator cell.The suspension system of a certain vehicle is mounted on coaster vehicle frame, wheel speed sensors are mounted on front-wheel
Knuckle in, be used to real-time detection front-wheel wheel speed.The fixing end of stay-supported type displacement sensor is mounted on the upper outstanding of rear suspension
It sets, triggering end is contacted with the bracket on rear suspension traveller.Master cylinder pressure sensor is connected in braking system.Braking system
Including electronics booster, six-way valve, caliper, brake disc, brake pipe.4 calipers are fixed on the knuckle of front and back, braking
Disk is fixed on hub bearing, and six-way valve one end is connected to by 4 brake pipes with 4 calipers, and one end passes through 1 brake oil
Pipe is connected to master cylinder pressure sensor, and the other end is connected to by 1 brake pipe with the first oil outlet of electronics booster.Master cylinder pressure
Force snesor is connected to by 1 brake pipe with the second oil outlet of electronics booster.Electronics booster, outer brake are controlled
Device, 12V Vehicular accumulator cell are fixed on coaster vehicle frame.
Refering to fig. 1, coaster active brake control module signal stream of the present invention are as follows: master cylinder pressure sensor, front-wheel wheel speed pass
Sensor, rear suspension displacement sensor, outer brake controller, electronics booster are all powered by 12V Vehicular accumulator cell, master cylinder pressure
Force snesor, front-wheel wheel speed sensors, rear suspension displacement sensor respectively to external brake monitor send master cylinder pressure signal,
Front-wheel wheel speed signal, rear suspension displacement signal, outer brake controller and electronics booster are all that external system is carried out by CAN line
Dynamic conditioned signal, brake pressure value signal, outer brake status signal, stops power-assisted increase signal at brake pressure enabling signal
Send and receive.The sampling period of outer brake controller is 10ms.
Referring to Fig.2, the specific steps of control method of the present invention are as follows:
Step 101: ground drag chain at the uniform velocity retreats；
Step 102: coaster being pushed into ground drag chain, is manually powered on electronics booster, on-test；
Step 103: outer brake conditioned signal is set to " 1 " by electronics booster, and outer brake status signal is set to
" 0 ", and send in real time；
Step 104: time counter, misuse triggering timing device are reset to 0 by outer brake controller；
Step 105: brake pressure enabling signal is set to " 0 " by outer brake controller, brake pressure value signal is set to
" 0 ", and send in real time；
Step 106: outer brake controller acquires the displacement signal of rear suspension displacement sensor in real time；
Step 107: the time counter in outer brake controller adds 1；
Step 108: outer brake controller records the rear suspension shift value of each sampled point；
Step 109: outer brake controller judges that time counter is equal to 500, if it is, step 110 is carried out, if
It is no, then carry out step 107；
Step 110: outer brake controller calculates the average value of the rear suspension shift value of 500 sampled points, this is averaged
Value is set to the zero point of rear suspension displacement；
Step 111: coaster accelerates to advance on drag chain, until velocity-stabilization；
Step 112: coaster is advanced under the driving of ground drag chain with certain speed；
Step 113: coaster reaches at beam obstacle；
Step 114: coaster is detached from ground drag chain, is moved on using inertia, and the displacement of coaster rear suspension is continuously increased；
Step 115: outer brake controller judges the displacement of coaster after-frame whether more than 10mm, if it is, carrying out step
116, if it is not, then carrying out step 114；
Step 116: outer brake controller collects the wheel speed value of front-wheel wheel speed sensors at this time in real time；
Step 117: outer brake controller calculates misuse triggering timing final value.By beam obstacle total length divided by step
Rapid 116 collected wheel speed value obtains misuse triggering timing final value；
Step 118: outer brake controller adds 1 for triggering timing device is misapplied；
Step 119: outer brake controller judges whether misuse triggering timing device is equal to misuse triggering timing final value, if
It is then to carry out step 120, if it is not, then carrying out step 118；
Step 120: outer brake controller collects the wheel speed value of front-wheel wheel speed sensors at this time in real time；
Step 121: outer brake controller calculates brake pressure value according to front-wheel wheel speed value.Joined according to braking system
Number, calibrates front-wheel wheel speed-brake pressure MAP chart, MAP chart is embedded in outer brake controller, outer brake controller root
According to the front-wheel wheel speed value of step 120, corresponding brake pressure is calculated, and issue；
Step 122: electronics booster real-time reception brake pressure enabling signal；
Step 123: outer brake controller judges whether brake pressure enabling signal is " 1 ", if it is, carrying out step
124, if it is not, then carrying out step 121；
Step 124: electronics booster receives brake pressure value signal；
Step 125: outer brake status signal is set to " 1 " and sent in real time by electronics booster；
Step 126: electronics booster carries out motor power-assisted according to brake pressure value, and power-assisted value is continuously increased.According to electronics
The parameter calibration of the transmission mechanisms such as booster inner turbine worm screw, ball-screw, gear, master cylinder area goes out brake pressure-motor
Power-assisted MAP chart, by the controller of MAP chart insertion electronics booster, electronics booster calculates correspondence according to brake pressure value
Motor power-assisted；
Step 127: pressure sensor acquires master cylinder pressure value signal in real time；
Step 128: outer brake controller judges whether master cylinder pressure force value is greater than brake pressure value, if it is, carrying out
Step 129, if it is not, then carrying out step 126；
Step 129: outer brake controller is sent to electronics booster stops the increased signal of power-assisted, and electronics booster stops
The only increase of motor power-assisted；
Step 130: outer brake controller judges whether wheel speed value is lower than 0.5m/s, if it is, step 131 is carried out,
If it is not, then carrying out step 129；
Step 131: electronics booster stops motor power-assisted, and coaster braking is completed, remain stationary；
Step 132: brake pressure enabling signal is set to " 0 " by outer brake controller, brake pressure value signal is set to
"0"；
Step 133: outer brake conditioned signal is set to " 1 " by electronics booster, and outer brake status signal is set to
"0"；
Step 134: manually will be electric under electronics booster, misapply off-test.
Claims (4)
1. a kind of drag chain type coaster active brake control method, which is characterized in that it is realized by coaster active brake control module,
Coaster active brake control module includes braking system, wheel speed sensors, displacement sensor, master cylinder pressure sensor, external system
Movement controller, 12V Vehicular accumulator cell, master cylinder pressure sensor, front-wheel wheel speed sensors, rear suspension displacement sensor, external system
Movement controller, electronics booster are all powered by 12V Vehicular accumulator cell；Master cylinder pressure sensor, front-wheel wheel speed sensors, rear overhang
Frame displacement sensor sends master cylinder pressure signal, front-wheel wheel speed signal, rear suspension displacement signal to external brake monitor respectively,
Outer brake controller and electronics booster pass through CAN line progress outer brake conditioned signal, brake pressure enabling signal, braking
Pressure value signal, stops sending and receiving for power-assisted increase signal at outer brake status signal.
2. a kind of drag chain type coaster active brake control method as described in claim 1, which is characterized in that the coaster is actively
The mounting means of brake control module are as follows: the suspension system of vehicle is mounted on coaster vehicle frame, and wheel speed sensors are mounted on front-wheel
Knuckle in；Displacement sensor is stay-supported type displacement sensor, and the fixing end of stay-supported type displacement sensor is mounted on rear suspension
Upper suspension on, triggering end is contacted with the bracket on rear suspension traveller；Master cylinder pressure sensor is connected in braking system, braking
System includes electronics booster, six-way valve, caliper, brake disc, brake pipe, and caliper is fixed on the knuckle of front and back, system
Moving plate is fixed on hub bearing, and six-way valve one end is connected to by brake pipe with caliper, and one end passes through brake pipe and master
Cylinder pressure transducer connection, the other end are connected to by brake pipe with the first oil outlet of electronics booster；Master cylinder pressure sensor
It is connected to by brake pipe with the second oil outlet of electronics booster；Electronics booster, outer brake controller, 12V vehicular electricity storage
Pond is fixed on coaster vehicle frame.
3. a kind of drag chain type coaster active brake control method as described in claim 1, which is characterized in that the braking method
The following steps are included:
Coaster is pushed into ground drag chain, is manually powered on electronics booster, on-test；
Electronics booster is adjusted to outer brake function；
Outer brake controller acquires the displacement signal of the rear suspension displacement sensor of a certain amount of sampled point in real time, is averaged work
For the zero point of rear suspension displacement；
Coaster accelerates to be advanced until velocity-stabilization on drag chain, and when coaster reaches at beam obstacle, coaster is detached from ground drag chain,
The displacement of coaster rear suspension is continuously increased, and when rear suspension displacement is more than a certain value, outer brake controller acquires front-wheel wheel in real time
The wheel speed value of fast sensor；
Outer brake controller calculates brake pressure value according to the wheel speed value of front-wheel；
Outer brake controller issues the instruction of starting brake pressure and needs brake pressure value signal to be achieved, sends electron
Booster；
When electronics booster receives the instruction of starting brake pressure, electronics booster carries out motor power-assisted, and power-assisted value is not
It is disconnected to increase；
Pressure sensor acquires master cylinder pressure value signal in real time, when master cylinder pressure force value is greater than brake pressure value, outer brake control
Device processed sends the instruction for stopping increasing power-assisted to electronics booster, and electronics booster stops the increase of motor power-assisted；
Wheel speed value persistently reduces, and when being lower than a certain value, electronics booster stops motor power-assisted, and coaster braking is completed, and coaster is protected
It holds static；
It is electric under electronics booster, off-test.
4. a kind of drag chain type coaster active brake control method as claimed in claim 3, which is characterized in that the braking method
Specifically include following procedure:
Step 101: ground drag chain at the uniform velocity retreats；
Step 102: coaster being pushed into ground drag chain, is manually powered on electronics booster, on-test；
Step 103: outer brake conditioned signal is set to " 1 " by electronics booster, and outer brake status signal is set to " 0 ", and
It sends in real time；
Step 104: time counter, misuse triggering timing device are reset to 0 by outer brake controller；
Step 105: brake pressure enabling signal is set to " 0 " by outer brake controller, brake pressure value signal is set to " 0 ", and
It sends in real time；
Step 106: outer brake controller acquires the displacement signal of rear suspension displacement sensor in real time；
Step 107: the time counter in outer brake controller adds 1；
Step 108: outer brake controller records the rear suspension shift value of each sampled point；
Step 109: outer brake controller judges that time counter is equal to 500, if it is, step 110 is carried out, if not,
Then carry out step 107；
Step 110: outer brake controller calculates the average value of the rear suspension shift value of 500 sampled points, this average value is set
For the zero point of rear suspension displacement；
Step 111: coaster accelerates to advance on drag chain, until velocity-stabilization；
Step 112: coaster is advanced under the driving of ground drag chain with certain speed；
Step 113: coaster reaches at beam obstacle；
Step 114: coaster is detached from ground drag chain, is moved on using inertia, and the displacement of coaster rear suspension is continuously increased；
Step 115: outer brake controller judges that whether coaster after-frame is displaced more than 10mm, if it is, step 116 is carried out,
If it is not, then carrying out step 114；
Step 116: outer brake controller collects the wheel speed value of front-wheel wheel speed sensors at this time in real time；
Step 117: outer brake controller calculates misuse triggering timing final value, by beam obstacle total length divided by step
116 collected wheel speed values obtain misuse triggering timing final value；
Step 118: outer brake controller adds 1 for triggering timing device is misapplied；
Step 119: outer brake controller judges whether misuse triggering timing device is equal to misuse triggering timing final value, if so,
Step 120 is then carried out, if it is not, then carrying out step 118；
Step 120: outer brake controller collects the wheel speed value of front-wheel wheel speed sensors at this time in real time；
Step 121: outer brake controller calculates brake pressure value according to front-wheel wheel speed value, according to braking system parameter, mark
Front-wheel wheel speed-brake pressure MAP chart is made, MAP chart is embedded in outer brake controller, outer brake controller is according to step
120 front-wheel wheel speed value, calculates corresponding brake pressure, and issue；
Step 122: electronics booster real-time reception brake pressure enabling signal；
Step 123: outer brake controller judges whether brake pressure enabling signal is " 1 ", if it is, step 124 is carried out,
If it is not, then carrying out step 121；
Step 124: electronics booster receives brake pressure value signal；
Step 125: outer brake status signal is set to " 1 " and sent in real time by electronics booster；
Step 126: electronics booster carries out motor power-assisted according to brake pressure value, and power-assisted value is continuously increased.According to electronics power-assisted
The parameter calibration of the transmission mechanisms such as device inner turbine worm screw, ball-screw, gear, master cylinder area goes out brake pressure-motor power-assisted
MAP chart, by the controller of MAP chart insertion electronics booster, electronics booster calculates corresponding electricity according to brake pressure value
Machine aided power；
Step 127: pressure sensor acquires master cylinder pressure value signal in real time；
Step 128: outer brake controller judges whether master cylinder pressure force value is greater than brake pressure value, if it is, carrying out step
129, if it is not, then carrying out step 126；
Step 129: outer brake controller is sent to electronics booster stops the increased signal of power-assisted, and electronics booster stops electricity
The increase of machine aided power；
Step 130: outer brake controller judges whether wheel speed value is lower than 0.5m/s, if it is, step 131 is carried out, if
It is no, then carry out step 129；
Step 131: electronics booster stops motor power-assisted, and coaster braking is completed, remain stationary；
Step 132: brake pressure enabling signal is set to " 0 " by outer brake controller, brake pressure value signal is set to " 0 "；
Step 133: outer brake conditioned signal is set to " 1 " by electronics booster, and outer brake status signal is set to " 0 "；
Step 134: manually will be electric under electronics booster, misapply off-test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910417171.7A CN110208012B (en) | 2019-05-20 | 2019-05-20 | Active braking control method for drag chain type tackle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910417171.7A CN110208012B (en) | 2019-05-20 | 2019-05-20 | Active braking control method for drag chain type tackle |
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| CN110208012A true CN110208012A (en) | 2019-09-06 |
| CN110208012B CN110208012B (en) | 2021-05-11 |
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| CN201910417171.7A Active CN110208012B (en) | 2019-05-20 | 2019-05-20 | Active braking control method for drag chain type tackle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113581777A (en) * | 2021-07-30 | 2021-11-02 | 合肥君信电子科技有限公司 | Cable-free rail car capable of automatically preventing derailing and hanger rail motion platform thereof |
| CN113776847A (en) * | 2021-07-26 | 2021-12-10 | 中国第一汽车股份有限公司 | Test system, test method and device for vehicle regenerative braking working condition and storage medium |
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| CN110208012B (en) | 2021-05-11 |
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