CN110006660A - A kind of retarder test system and test method of pressure and communication two-pass design - Google Patents
A kind of retarder test system and test method of pressure and communication two-pass design Download PDFInfo
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- CN110006660A CN110006660A CN201910155887.4A CN201910155887A CN110006660A CN 110006660 A CN110006660 A CN 110006660A CN 201910155887 A CN201910155887 A CN 201910155887A CN 110006660 A CN110006660 A CN 110006660A
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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
- G01M13/00—Testing of machine parts
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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
Abstract
The present invention relates to the retarder test systems and test method of a kind of pressure and communication two-pass design, solve the problems, such as the performance test and cannot be compatible with no air pressure environmental testing that existing retarder test system is not able to satisfy under pressure sensor failure.The system includes first pressure sensor, retarder torque arithmetic module, mechanics of vehicles module, second pressure sensor, signal management module and signal forwarding simulation management module；First pressure sensor and second pressure sensor are arranged on retarder ontology；The signal of first pressure sensor forwards simulation management module to be transmitted to retarder torque arithmetic module, mechanics of vehicles module by signal management module transfer to buffer controller, the signal of second pressure sensor by signal；Retarder torque arithmetic module, mechanics of vehicles module forward simulation management module that vehicle speed information is transmitted to buffer controller by signal；Retarder ontology receives the signal of buffer controller by signal management module.
Description
Technical field
The present invention relates to a kind of retarder test systems, and in particular to a kind of retarder survey of pressure and communication two-pass design
Test system and test method.
Background technique
Heavy vehicle is under complex working condition, such as long down hill braking, level road are frequently braked, and driving main brake is compared to general
Operating condition severity of braking is significantly increased, and such situation will lead to the problems such as brake accelerates abrasion, brake lining accelerates decline, if reaching
To certain severity, it can lead to the failure of main brake, cause traffic accident.Retarder mainly by vehicle operating interface,
The composition such as buffer controller, retarder ontology, buffer controller are based on the signals such as vehicle speed, calculate goal pressure,
Goal pressure is fed back into retarder ontology, realizes that retarder actual pressure is consistent with goal pressure, thus the essence of realization device
True brake force output, constant speed and graded brake function can be achieved under the operating conditions such as ramp level road, can effectively reduce main brake
Pressure, relative to other auxiliary brakings (engine braking, current vortex retarder), Retarder is big with braking moment, makes
The advantages that dynamic steady, noise is small, the service life is long, small in size.
The existing retarder test system based on product characteristic exploitation, except vehicle movement under force characteristic, retarder pressure are turned round
Square characteristic is loaded outside mould realization by vehicle emulation controller, and other is actual characteristic (pressure response etc.), and analog is realized
The constant speed and braking by grades performance of retarder.As shown in Figure 1, the signal transmission path of existing test macro are as follows: (the operation of 1 gear
Panel output), speed (output of mechanics of vehicles module), 3 target pressure of pressure feedback (sensor acquisition) -- 2 buffer controller --
Power output -- 4 retarder ontologies.
But with the raising of control function requirement and the needs of controller off-line test, existing retarder test system
System Shortcomings in the following areas: 1. are not able to satisfy the performance test needs under pressure sensor failure；2. no gas cannot be compatible with
The test in pressure ring border needs.
Summary of the invention
The performance under pressure sensor failure is not able to satisfy present invention aim to address existing retarder test system to survey
The problem of trying and cannot being compatible with no air pressure environmental testing provides the retarder test system of a kind of pressure and communication two-pass design
And test method.
The technical scheme is that
A kind of retarder test system of pressure and communication two-pass design, including first pressure sensor, retarder torque
Computing module, mechanics of vehicles module, the retarder include buffer controller and retarder ontology, the retarder ontology packet
Include retarder actuator and operating pressure chamber, be characterized in that further include second pressure sensor, signal management module and
Signal forwards simulation management module；The first pressure sensor and second pressure sensor are arranged on retarder ontology；
The signal of the first pressure sensor passes through signal management module transfer to buffer controller, the second pressure sensor
Signal by signal forward simulation management module be transmitted to retarder torque arithmetic module, mechanics of vehicles module；It is described slow
Device torque arithmetic module, mechanics of vehicles module forward simulation management module that vehicle speed information is transmitted to retarder control by signal
Device；The retarder ontology receives the signal of buffer controller by signal management module, and the signal management module is to the
One pressure sensor, retarder actuator carry out signal cut and connection control, carry out direct fault location to system；The signal turns
Hair simulation management module exports corresponding emulated pressure for forward signal and under goal pressure request.
Further, the buffer controller is connect with operation panel.
Further, the retarder actuator on be additionally provided with gas source.
Further, the gas source is compression pump or pressure piping.
Further, the buffer controller is connect with signal forwarding simulation management module by CAN1 communication module.
Further, the signal forwarding simulation management module and retarder torque arithmetic module, mechanics of vehicles module are logical
Cross the connection of CAN2 communication module.
Meanwhile the present invention also provides a kind of tests of retarder test system based on above-mentioned pressure and communication two-pass design
Method,
When working as system worked well, and testing under true air pressure environment, step 1) is executed；
1) first pressure sensor acquires retarder bulk density, and by signal management module is transmitted to the signal slow
Fast device controller, second pressure sensor acquires retarder bulk density information, and the pressure information is forwarded by signal and is imitated
True management module is transmitted to retarder torque arithmetic module, mechanics of vehicles module obtains vehicle speed information, and signal forwards simulation management
The vehicle speed information is transmitted to buffer controller by module, and operation panel acquires gear information and exports to buffer controller,
Buffer controller calculates the actual pressure output valve of retarder ontology according to obtained pressure value, gear information, vehicle speed information,
And the output of retarder bulk density is adjusted in real time；
When working as the system failure, and testing under true air pressure environment, step 2) is executed；
2) second pressure sensor acquires retarder bulk density information, and the pressure information is forwarded by signal and is emulated
Management module is transmitted to retarder torque arithmetic module, mechanics of vehicles module obtains vehicle speed information, and signal forwards simulation management mould
The vehicle speed information is transmitted to buffer controller by block, and buffer controller adjusts retarder according to obtained vehicle speed information in real time
The output of bulk density；
When system is tested under no pressure environment, step 3) is executed；
3) signal forwarding simulation management module exports corresponding emulated pressure according to goal pressure, and emulated pressure is transmitted
To retarder torque arithmetic module, mechanics of vehicles module, retarder torque arithmetic module, mechanics of vehicles module are imitative according to what is obtained
True pressure output vehicle speed information, and forward simulation management module to be sent to buffer controller by signal the vehicle speed information,
Buffer controller adjusts the output of retarder bulk density according to obtained vehicle speed information in real time.
Compared with prior art, the present invention having following technical effect that
1. present system increases second pressure sensor and signal forwards simulation management module, it can reflect that signal is normal
When buffer controller output, and can in retarder bulk density signal fault real-time measurement pressure, accurately test it is slow
Fast device brake pressure, reaches vehicle braking effect.
2. present system, under without true barometric information, signal forwards simulation management module to emulate pressure characteristic, base
Corresponding emulated pressure is exported in goal pressure, to obtain torque responsive output according to pressure is simulated, torque output is provided
The emulation of speed and revolving speed is realized to auto model, realizes the test without air pressure environment.
3. test system and test coverage of the present invention is high, can the buffer controller pressure under test failure control effect
Fruit provides necessary development tool for the function upgrading of product, verifying sizing.
Detailed description of the invention
Fig. 1 is existing retarder test system schematic diagram；
Fig. 2 is pressure of the present invention and the retarder test system schematic diagram for communicating two-pass design.
Specific embodiment
The contents of the present invention are described in further detail below in conjunction with the drawings and specific embodiments:
According to the retarder test system that traditional approach is developed based on product characteristic, except vehicle movement under force characteristic, slowly
Device pressure torque characteristic is loaded outside mould realization by vehicle emulation controller, and other is actual characteristic (pressure response etc.), can
The constant speed and braking by grades performance of simulated implementation retarder.But the raising and the offline inspection of controller required with control function
The needs of survey, existing system come with some shortcomings, and have been unable to meet increasingly increased performance test needs.For this purpose, in existing system
On the basis of system, increase a signal forwarding simulation management module and second pressure sensor for message forwarding, pressure monitoring, letter
It is connect number respectively by CAN1 and CAN2 with relevant device, improves the power of test and coverage of test macro.
The retarder test system of pressure as shown in Figure 2 and communication two-pass design, including it is first pressure sensor, slow
Device torque arithmetic module, mechanics of vehicles module, second pressure sensor, signal management module and signal forward simulation management mould
Block, retarder include buffer controller and retarder ontology.
First pressure sensor and second pressure sensor are arranged on retarder ontology；The letter of first pressure sensor
Number by signal management module transfer to buffer controller, the signal of second pressure sensor forwards simulation management by signal
Module transfer is to retarder torque arithmetic module, mechanics of vehicles module；Retarder torque arithmetic module, mechanics of vehicles module pass through
Signal forwards simulation management module that vehicle speed information is transmitted to buffer controller；Retarder ontology is connect by signal management module
Receive buffer controller signal, signal management module to first pressure sensor, retarder actuator carry out signal cut and
Connection control carries out direct fault location to system；Signal forwarding simulation management module is asked for forward signal and in goal pressure
Seek the corresponding emulated pressure of lower output.Buffer controller is connect with operation panel, realizes the input of gear.
In the case where there is pressure test environment, gas source is provided on retarder actuator, the setting of gas source is so that retarder sheet
Body has a pressure output always, gas source concretely compression pump or pressure piping, defeated without signal forwarding simulation management module at this time
Emulated pressure out.
Buffer controller is connect with signal forwarding simulation management module by CAN1 communication module.Signal forwarding emulation pipe
Reason module is connect with retarder torque arithmetic module, mechanics of vehicles module by CAN2 communication module.To monitor system two-way CAN
Signal, test computer configure the signal monitoring of two sets CAN communication converters for CAN1 and CAN2, in two-way CAN signal,
CAN2 fixed configurations rate is 250k, CAN1 be configured to according to demand 250k one of 500k etc..The pressure output side of system at this time
Formula are as follows: the output valve of detection second pressure sensor, and pressure value is broadcast on CAN2, ID ID1；System speed forwarding side
Formula are as follows: receive the speed from mechanics of vehicles module on bus CAN2, ID ID2 forwards the signal to bus CAN1, and ID is not
Become.
The input of buffer controller is pressure, gear (being connect by physics mode with buffer controller), speed (are led to
Cross bus mode identification), function are as follows: identification driver intention (gear), vehicle-state (speed), retarder state (pressure
Power), it is based on control algolithm, carries out the work such as gear identification, mode treatment, goal pressure update, electric current output adjusting, it is final real
The adjusting of existing pressure, output is electric current.
The input of retarder ontology is electric current, and effect is: vehicle a certain range air pressure adjustment is electricity by driving proportioning valve
Corresponding linear convergent rate pressure is flowed, pressure response characteristic is that the reflection of real object exports certain torsion when vehicle is run
Square；What it was exported is pressure, torque (exporting when only dynamic is tested).
The input of retarder torque arithmetic module is pressure, revolving speed, speed；It is acted on: based on true pressure or emulation pressure
Power, revolving speed, speed output torque；Its export be torque (test environment can not dynamic implement, torque be based on simulation revolving speed calculate),
The module is existing capability module.
The input of mechanics of vehicles module is torque, and effect is: based on retarder torque, the other stress of vehicle, being calculated real
When vehicle total stress, clap speed based on upper one and current accelerometer of clapping combined to calculate current vehicle speed and rotating speed of transmission shaft；Its is defeated
It is speed, revolving speed out, which is existing capability module.
Operation panel arranges drivers' operating devices such as handle, with controller physical connection, is converted into after controller identification
Shift signal.
Signal management module carries out signal cut to first pressure sensor, actuator and connection controls, and simulates various fields
Scape (normal, open-circuit fault, short trouble).
Signal forwarding simulation management module handles the second pressure sensor signal (bulk density) of monitoring, is based on
Customized message broadcasting is forwarded to can1. to auxiliary on bus CAN1 to the speed on bus CAN2, revolving speed to CAN1 and CAN2.
Brake request is helped to be forwarded to CAN2.Meanwhile real work chamber is replaced using working chamber model, it is requested in certain goal pressure
Under, export corresponding emulation actual pressure.
In present system, measurand is buffer controller, which connect with operation panel, identification
Driver's request or signals of vehicles request, in conjunction with current vehicle speed, revolving speed, temperature etc., output pressure and auxiliary braking driving signal,
By realizing that the pressure of retarder actuator is adjusted after signal management module, buffer controller real-time update goal pressure, reality
Measuring pressure (bulk density), for realizing the control under various operating conditions.Speed, revolving speed forward simulation management module to pass by signal
Transport to the acquisition of vehicle emulation controller (i.e. retarder torque arithmetic module, mechanics of vehicles module) signal.Temperature is derived from signal pipe
The analogue unit of reason realizes the simulation of total temperature range.
The signal transmission path of test macro are as follows: gear (operation panel input), speed (being obtained from mechanics of vehicles module),
Pressure (first pressure sensor acquisition) -- -- survey buffer controller by goal pressure output -- electric current output -- retarder ontology
Actual pressure output-first pressure sensor is measured, which is closed loop cycle.
Retarder and vehicle emulate signal path are as follows: actual pressure exports (second pressure sensor) or goal pressure -- letter
Number forwarding simulation management module -- retarder torque arithmetic module -- mechanics of vehicles module --- speed real-time update output
(CAN2) -- signal forwards the output of simulation management module -- buffer controller -- goal pressure.
Retarder test system based on above-mentioned pressure and communication two-pass design, the test method of the system are specifically divided into three
Kind situation；
When working as system worked well, and testing under true air pressure environment, step 1) is executed；
1) first pressure sensor acquires retarder bulk density, and by signal management module is transmitted to the signal slow
Fast device controller, second pressure sensor acquires retarder bulk density information, and the pressure information is forwarded by signal and is imitated
True management module is transmitted to retarder torque arithmetic module, mechanics of vehicles module obtains vehicle speed information, and signal forwards simulation management
The vehicle speed information is transmitted to buffer controller by module, and operation panel acquires gear information and exports to buffer controller,
Buffer controller calculates the actual pressure output valve of retarder ontology according to obtained pressure value, gear information, vehicle speed information,
And the output of retarder bulk density is adjusted in real time；
When the system failure (first pressure sensor failure or signal management module shutoff signal make line fault), and
When testing under true air pressure environment, step 2) is executed；
2) second pressure sensor acquires retarder bulk density information, and the pressure information is forwarded by signal and is emulated
Management module is transmitted to retarder torque arithmetic module, mechanics of vehicles module obtains vehicle speed information, and signal forwards simulation management mould
The vehicle speed information is transmitted to buffer controller by block, and buffer controller adjusts retarder according to obtained vehicle speed information in real time
The output of bulk density；
When system is tested under no pressure environment, step 3) is executed；
3) signal forwarding simulation management module exports corresponding emulated pressure according to goal pressure, and emulated pressure is transmitted
To retarder torque arithmetic module, mechanics of vehicles module, retarder torque arithmetic module, mechanics of vehicles module are imitative according to what is obtained
True pressure output vehicle speed information, and forward simulation management module to be sent to buffer controller by signal the vehicle speed information,
Buffer controller adjusts the output of retarder bulk density according to obtained vehicle speed information in real time.
That is, present system can carry out different configurations and realize according to testing requirement difference.
One, true air pressure environment, gas source provides pressure at this time；
Specific test method are as follows: the emulation testing of pressure sensor normal mode, after system starting, vehicle and retarder mould
Type controller is based on car weight, the gradient, retarder pressure etc. in real time, calculates stress relationship based on vehicle and retarder data, realizes
Speed is increasedd or decreased, is kept.The retarder pressure of auto model identification at this time is from second pressure sensor.
In the following two cases, this system can realize test:
1, when normal mode first pressure sensor, second pressure sensor signal are normal, buffer controller according to
First pressure sensor realizes accurately pressure control effect, while reflecting onto two pressure sensors, and pressure signal is true
Effectively, it may be verified that the optimum control performance of product.
2, first pressure sensor signal or line fault, second pressure sensor is normal, and buffer controller is according to
The pressure control effect that two pressure sensors are realized, pressure signal are authentic and valid.First pressure sensor invalidating signal, vehicle mould
Type can monitor true pressure, it may be verified that the control performance under the fault-tolerant strategy of product and the operating condition.
3, first pressure sensor break fault, by the system, it can be achieved that failure occurs and the appearance of the product under recovery
Mistake surveys record and control performance.
Two, without true air pressure environment, at this point, signal forwarding simulation management module provides emulated pressure.
Specific test method are as follows: after system starting, signal forwards the operation of simulation management module emulated pressure characteristic model, vehicle
Model controller is based on car weight, the gradient, emulated pressure etc. in real time, calculates stress relationship based on vehicle and retarder data, real
Existing speed increaseds or decreases.Under the mode, it may be verified that the function under the full speed of buffer controller.
Present system meets the performance test under pressure sensor failure, the pressure sensor in existing test macro
When normal, test macro signal can normal transmission, realize speed, pressure emulation testing adjust.But pressure sensor failure
Under, buffer controller is based on pressure signal and is diagnosed and handled, adjusted, and output valve under fault-free relative to changing.
At this point, the failure of pressure signal can not really reflect actual pressure control effect, therefore export for mechanics of vehicles module
Be worth it is insincere, cause closed-loop control emulation cannot achieve.When in order to reflect that signal is normal buffer controller output and
Can in bulk density signal fault real-time measurement pressure control, retarder braking, vehicle braking effect, system is made following
It improves: 1, increasing the second pressure sensor of performance monitoring, simulation calculation, first pressure sensor is used for buffer controller
Pressure control.2, increase signal and forward simulation management module, which supports two-way CAN, and system becomes duplex communication system,
CAN1 is the 1st tunnel, and CAN2 is the 2nd tunnel.
In existing test macro, under no air pressure environment, system cannot export true pressure, thus mechanics of vehicles module without
Method gets pressure signal, at this time signal transmission path are as follows: (speed, gear, pressure input -- buffer controller -- target pressure
Power output -- electric current output), only it is able to achieve open-loop test.In order to solve this problem, true pressure is substituted by emulated pressure environment
Force environment.The present invention increases signal and forwards simulation management module, which replaces real work chamber using working chamber model, one
Under fixed goal pressure request, corresponding emulation actual pressure is exported.At this point, signal transmission path are as follows: speed gear input-
-- -- goal pressure is converted into emulation actual pressure -- retarder torque arithmetic module -- to buffer controller for goal pressure output
Mechanics of vehicles module --- speed variation.The signal of present system forwards simulation management module, first reports buffer controller
Target pressure value receive, then using the pressure value as actual pressure value (actual pressure follows goal pressure), the last value
It is broadcast to CAN2 in bus, ID is the mode of ID1, realizes the simulation of actual pressure.Auto model is simulated under controller platform
Operation, is able to satisfy the requirement of real-time of test, and more previous pc system operation can more reflect the control performance of tested controller.
Under true air pressure environment, this system configures two pressure sensors, and (first pressure sensor and second pressure are passed
Sensor), respectively with buffer controller and signal forwarding simulation management module connect, can meet buffer controller normally,
Test verifying under the various modes such as failure.Signal forwards simulation management module monitored over time pressure signal for the slow of vehicle
The emulation of device torque characteristics.Under without true barometric information, signal forwards simulation management module to emulate pressure characteristic, is based on target
Pressure combines certain algorithm simulating to go out pressure torque response characteristic (such as inertial element), and torque output is supplied to auto model
Realize the emulation of speed and revolving speed.
Claims (7)
1. the retarder test system of a kind of pressure and communication two-pass design, including first pressure sensor, retarder torquemeter
Module, mechanics of vehicles module are calculated, the retarder includes buffer controller and retarder ontology, and the retarder ontology includes
Retarder actuator and operating pressure chamber, it is characterised in that: further include that second pressure sensor, signal management module and signal turn
Send out simulation management module；
The first pressure sensor and second pressure sensor are arranged on retarder ontology；The first pressure sensor
Signal by signal management module transfer to buffer controller, the signal of the second pressure sensor passes through signal forwarding
Simulation management module is transmitted to retarder torque arithmetic module, mechanics of vehicles module；The retarder torque arithmetic module, vehicle
Mechanics module forwards simulation management module that vehicle speed information is transmitted to buffer controller by signal；
The retarder ontology receives the signal of buffer controller by signal management module, and the signal management module is to the
One pressure sensor, retarder actuator carry out signal cut and connection control, carry out direct fault location to system；The signal turns
Hair simulation management module exports corresponding emulated pressure for forward signal and under goal pressure request.
2. the retarder test system of pressure according to claim 1 and communication two-pass design, it is characterised in that: described slow
Fast device controller is connect with operation panel.
3. the retarder test system of pressure according to claim 2 and communication two-pass design, it is characterised in that: described slow
Gas source is additionally provided on fast device actuator.
4. the retarder test system of pressure according to claim 3 and communication two-pass design, it is characterised in that: the gas
Source is compression pump or pressure piping.
5. the retarder test system of pressure according to any one of claims 1 to 4 and communication two-pass design, feature exist
In: the buffer controller is connect with signal forwarding simulation management module by CAN1 communication module.
6. the retarder test system of pressure according to claim 5 and communication two-pass design, it is characterised in that: the letter
Number forwarding simulation management module connect with retarder torque arithmetic module, mechanics of vehicles module by CAN2 communication module.
7. the test method of the retarder test system based on any pressure of claim 1 to 6 and communication two-pass design,
It is characterized in that:
When working as system worked well, and testing under true air pressure environment, step 1) is executed；
1) first pressure sensor acquires retarder bulk density, and the signal is transmitted to retarder by signal management module
Controller, second pressure sensor acquires retarder bulk density information, and the pressure information is forwarded emulation pipe by signal
Reason module transfer to retarder torque arithmetic module, mechanics of vehicles module obtains vehicle speed information, and signal forwards simulation management module
The vehicle speed information is transmitted to buffer controller, operation panel acquires gear information and exports to buffer controller, slowly
Device controller calculates the actual pressure output valve of retarder ontology according to obtained pressure value, gear information, vehicle speed information, and real
When adjust retarder bulk density output；
When working as the system failure, and testing under true air pressure environment, step 2) is executed；
2) second pressure sensor acquires retarder bulk density information, and the pressure information is forwarded simulation management by signal
Module transfer to retarder torque arithmetic module, mechanics of vehicles module obtains vehicle speed information, and signal forwards simulation management module will
The vehicle speed information is transmitted to buffer controller, and buffer controller adjusts retarder ontology according to obtained vehicle speed information in real time
The output of pressure；
When system is tested under no pressure environment, step 3) is executed；
3) signal forwarding simulation management module exports corresponding emulated pressure according to goal pressure, and emulated pressure is transmitted to slow
Fast device torque arithmetic module, mechanics of vehicles module, retarder torque arithmetic module, mechanics of vehicles module are according to obtained emulation pressure
Power exports vehicle speed information, and forwards simulation management module to be sent to buffer controller by signal the vehicle speed information, slowly
Device controller adjusts the output of retarder bulk density according to obtained vehicle speed information in real time.
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| CN201910155887.4A CN110006660B (en) | 2019-03-01 | 2019-03-01 | Retarder test system and method with pressure and communication double-circuit design |
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| CN201910155887.4A CN110006660B (en) | 2019-03-01 | 2019-03-01 | Retarder test system and method with pressure and communication double-circuit design |
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| CN113848848A (en) * | 2021-09-22 | 2021-12-28 | 陕西法士特齿轮有限责任公司 | Retarder test method for simulating whole vehicle message environment |
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