CN1603776A - Wheel speed signal real time simulation device and method for vehicle anti-lock brake system - Google Patents
Wheel speed signal real time simulation device and method for vehicle anti-lock brake system Download PDFInfo
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- CN1603776A CN1603776A CN 200410081217 CN200410081217A CN1603776A CN 1603776 A CN1603776 A CN 1603776A CN 200410081217 CN200410081217 CN 200410081217 CN 200410081217 A CN200410081217 A CN 200410081217A CN 1603776 A CN1603776 A CN 1603776A
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Abstract
It is car anti-locking brake system wheel speed real time artificial apparatus, which comprises central processor, pressure sensor, parallel EEPROM data storage, program storage, data locker, inverter, serial interface circuit, quartz-oscillator circuit, reset circuit, power module, base power, and output circuit. The operation procedures are the following: initial sub-procedure, HSO interval process sub-procedure, recursion figure procedure and serial receiving interval process sub-procedure.
Description
Technical field
The present invention relates to a kind of apparatus and method of vehicle wheel speed signal, particularly the simulator of vehicle anti-lock brake system wheel speed signal real-time parameter and method.
Background technology
The anti-lock braking system of vehicle will be leaned in the process of development and carry out a large amount of real vehicle road brake tests on the road surface of driver at different attachment coefficients, simulates under the various situations and brakes, to determine the control mode and the controlled variable of brake system.This vehicle road test all compares dangerous usually, especially anti-lock braking system in development process and imperfection, most car brakeing tests all inevitably can cause in process of the test and various unsafe conditions occur, as breakking away, overturn etc., cause casualties and property loss.The brake test of the domestic anti-lock braking system that does not also allow at present vehicle, the corresponding device thereof of under static state finishing.
Summary of the invention
In order to solve at present in the real vehicle road brake test of the anti-lock braking system of carrying out vehicle, exist brake failure takes place easily, cause the defective of personnel and property loss, the invention provides a kind of can simulating on the emulation road surface, the real time kinematics state of wheel of vehicle, and can simulate the wheel speed signal of the vehicle that the vehicle anti-lock brake system under the various pavement states needs, for the brake test use, allow vehicle under static state realize the apparatus and method of dynamic brake test.
The present invention seeks to realize like this: a kind of vehicle anti-lock brake system wheel speed signal real time simulation device is characterized in that: it comprises central processing unit, pressure transducer, parallel EEPROM data-carrier store storer, program storage, data latches, phase inverter, serial interface circuit, crystal oscillating circuit, reset circuit, power module, reference power supply, output circuit; Central processing unit is connected with pressure transducer, parallel EEPROM data-carrier store storer, program storage, data latches, phase inverter, serial interface circuit, crystal oscillating circuit, reset circuit, power module, reference power supply, output circuit respectively.
The non-end of CE of the P4.7 port of above-mentioned central processing unit and program storage is connected; Be connected to a phase inverter between central processing unit and the parallel EEPROM data-carrier store, the P4.7 port of central processing unit and an end of phase inverter are connected, and the non-end of CE of the other end of phase inverter and parallel EEPROM data-carrier store is connected; The P4.0 of central processing unit～P4.6 port is connected with the A8～A14 port of parallel EEPROM data-carrier store, program storage respectively; The 1D of the P3.0 of central processing unit～P3.7 port and data latches～8D port is connected; The P3.0 of central processing unit～P3.7 port also is connected with the D0～D7 port of parallel EEPROM data-carrier store, program storage; The 1Q of data latches～8Q port is connected with the A0～A7 port of parallel EEPROM data-carrier store, program storage respectively.
The signal simulation method of above-mentioned vehicle anti-lock brake system wheel speed signal real time simulation device, the main flow of its running program comprise initialization subroutine, HSO Interrupt Process subroutine, recursive calculation subroutine, serial received Interrupt Process subroutine.
The signal simulation method of above-mentioned vehicle anti-lock brake system wheel speed signal real time simulation device, the process step of its master routine is:
After the beginning, central processing unit is at first put stack pointer, and sends disable interrupt instruction;
Call initialization subroutine;
Start 0 passage of HSO, is set first setting time;
Open interruption;
Enter the idle loop state, wait for and interrupt taking place.
The signal simulation method of above-mentioned vehicle anti-lock brake system wheel speed signal real time simulation device, the process step of its initialization subroutine is:
Disabled interrupt at first; The register zero clearing;
Vehicle is called in and preset to central processing unit from data-carrier store
The initial level speed of this wheel; With
The initial level retarded velocity of this wheel; With
The initial level angular deceleration of this wheel; With
The moment of inertia of this wheel; With
The effective radius of this wheel;
The initial angle speed that central processing unit calculates this wheel according to the initial level speed and the effective radius of this wheel;
Vehicular gross combined weight is called in and preset to central processing unit from data-carrier store; With
Vehicle's center of gravity point height; With
The signal panels number of teeth of wheel;
The simulation status control word is called in and preset to central processing unit from data-carrier store, and to indicate in the simulation status control word be front-wheel or trailing wheel;
The initial address of attachment coefficient table is called in and preset to central processing unit from data-carrier store;
The front and rear wheel wheelbase of vehicle is called in and preset to central processing unit from data-carrier store; With
Vehicle's center of gravity point height; With
The horizontal range of vehicle's center of gravity point and hind axle;
Opening HSO interrupts;
Carry out the serial ports initialization;
Link order is called the place.
The signal simulation method of above-mentioned vehicle anti-lock brake system wheel speed signal real time simulation device, the process step of its HSO Interrupt Process subroutine is:
Disabled interrupt at first;
Central processing unit presets 0 a channel reset time that does not cause the HSO of interruption, produces the negative edge of vehicle speed signal pulse with this;
Carry out the A/D conversion of brake pressure;
Calculate the time Δ T that angle that this wheel under the current angular velocity turns over a tooth needs;
Central processing unit presets 0 a passage set time counter value T who causes the HSO of interruption
I+1=T
i+ Δ T, T
iRepresent this HSO set to interrupt the moment of taking place;
Call the recursive calculation subroutine, in this subroutine, utilize T
iKinematic parameter constantly calculates T
I+1Kinematic parameter;
Open interruption;
Link order is called the place.
The signal simulation method of above-mentioned vehicle anti-lock brake system wheel speed signal real time simulation device, the process step of its recursive calculation subroutine is:
Disabled interrupt at first;
Calculate wheel and turn to next signal teeth T constantly constantly by the current demand signal tooth
I+1Corresponding horizontal velocity;
Calculate wheel and turn to next signal teeth T constantly constantly by the current demand signal tooth
I+1Corresponding angular velocity;
Calculate wheel and turn to next signal teeth T constantly constantly by the current demand signal tooth
I+1Corresponding horizontal retarded velocity;
Calculate wheel and turn to next signal teeth T constantly constantly by the current demand signal tooth
I+1Corresponding angular deceleration;
Carry out data transfer, T
I+1The horizontal velocity of this corresponding wheel, angular velocity, horizontal retarded velocity, angular deceleration prepare to carry out when HSO interrupts next time recursive calculation as current horizontal velocity, angular velocity, horizontal retarded velocity, angular deceleration;
Open interruption;
Link order is called the place.
The signal simulation method of above-mentioned vehicle anti-lock brake system wheel speed signal real time simulation device, the process step of its serial received Interrupt Process subroutine is:
Disabled interrupt at first;
Receive the horizontal retarded velocity component of other wheel in the vehicle;
Open interruption;
Link order is called the place.
The model of above-mentioned central processing unit is INTEL80C196KB/KC; The model of above-mentioned parallel EEPROM data-carrier store is AT28C256; The model of said procedure storer is 27C256; The model of above-mentioned data latches is 74LS373; The model of above-mentioned phase inverter is 74LS04.
The invention has the beneficial effects as follows: owing to adopted the software pilot program of central processing unit control, overcome the method that traditional ABS (Anti-lock Braking System) test is carried out on real road, the test of anti-lock vehicle braking control system just can be finished indoor, accelerated anti-lock vehicle braking control system development process greatly and the matching process of new model.And repeatability, the conversion on emulation road surface are good, and pavement state can arbitrarily design as required, and there is not the safety problem of real vehicle road brake test in process of the test.
Description of drawings:
The present invention is described further below in conjunction with accompanying drawing.
Fig. 1 is a device block scheme of the present invention.
Fig. 2 is a main flow block diagram of the present invention.
Fig. 3 is initialization subroutine process step figure of the present invention.
Fig. 4 is HSO Interrupt Process subroutine process step figure of the present invention.
Fig. 5 is recursive calculation subroutine process step figure of the present invention.
Fig. 6 is serial received Interrupt Process subroutine process step figure of the present invention.
Embodiment:
A kind of vehicle anti-lock brake system wheel speed signal real time simulation device, it comprises central processing unit, pressure transducer, parallel EEPROM data-carrier store, program storage, data latches, phase inverter, serial interface circuit, crystal oscillating circuit, reset circuit, power module, reference power supply, output circuit; Central processing unit is connected with pressure transducer, parallel EEPROM data-carrier store, program storage, data latches, phase inverter, serial interface circuit, crystal oscillating circuit, reset circuit, power module, reference power supply, output circuit respectively.
The non-end of CE of the P4.7 port of above-mentioned central processing unit and program storage is connected; Be connected to a phase inverter between central processing unit and the parallel EEPROM data-carrier store, the P4.7 port of central processing unit and an end of phase inverter are connected, and the non-end of CE of the other end of phase inverter and parallel EEPROM data-carrier store is connected; The P4.0 of central processing unit～P4.6 port is connected with the A8～A14 port of parallel EEPROM data-carrier store, program storage respectively; The 1D of the P3.0 of central processing unit～P3.7 port and data latches～8D port is connected; The P3.0 of central processing unit～P3.7 port also is connected with the D0～D7 port of parallel EEPROM data-carrier store, program storage; The 1Q of data latches～8Q port is connected with the A0～A7 port of parallel EEPROM data-carrier store, program storage respectively.
Referring to Fig. 1.In the present embodiment: central processing unit adopts 16 single-chip microcomputer INTEL80C196KB/KC; Power module adopts chip 7805 and known filter rectifier; Reset circuit adopts the reset circuit of known INTEL80C196KB/KC central processing unit requirement; Crystal oscillating circuit adopts the crystal oscillator clock circuit of known INTEL80C196KB/KC central processing unit requirement; The peripheral circuit that reference power supply adopts chip MAXIM875 and chip to require constitutes the A/D conversion benchmark voltage of 5V; Pressure transducer adopts CEMPX4IV2GSDM1, is used for detecting brake pressure; Serial interface circuit adopts the peripheral circuit of RS232 interface chip and requirement thereof; Phase inverter 74LS04 and latch 74LS373 are the known circuits that requires as the single-chip microcomputer memory expansion; Program storage 27C256 preserves the analogue system application program, and data-carrier store AT28C256 is used for preserving the structural parameters initial motion parameter of the vehicle of wanting emulation that application program needs and attachment coefficient tables of data etc.; Output circuit adopts the wheel speed signal of known photoelectric isolating circuit output emulation.
The signal simulation method of above-mentioned vehicle anti-lock brake system wheel speed signal real time simulation device, the main flow of its running program comprise initialization subroutine, HSO Interrupt Process subroutine, recursive calculation subroutine, serial received Interrupt Process subroutine.
The signal simulation method of above-mentioned vehicle anti-lock brake system wheel speed signal real time simulation device, the process step of its master routine is:
After the beginning, central processing unit is at first put stack pointer, and sends disable interrupt instruction;
Call initialization subroutine;
Start 0 passage of HSO, is set first setting time;
Open interruption;
Enter the idle loop state, wait for and interrupt taking place.
Referring to Fig. 2.The master routine of realizing the wheel speed signal emulation mode is to put stack pointer earlier; Disabled interrupt is called initialization subroutine then; Start 0 passage of HSO again, is set first setting time; Carry out then and open interruption; Final program enters the idle loop state, waits for the generation of interrupting.
The signal simulation method of above-mentioned vehicle anti-lock brake system wheel speed signal real time simulation device, the process step of its initialization subroutine is:
Disabled interrupt at first; The register zero clearing;
Vehicle is called in and preset to central processing unit from data-carrier store
The initial level speed of this wheel; With
The initial level retarded velocity of this wheel; With
The initial level angular deceleration of this wheel; With
The moment of inertia of this wheel; With
The effective radius of this wheel;
The initial angle speed that central processing unit calculates this wheel according to the initial level speed and the effective radius of this wheel;
Vehicular gross combined weight is called in and preset to central processing unit from data-carrier store; With
Vehicle's center of gravity point height; With
The signal panels number of teeth of wheel;
The simulation status control word is called in and preset to central processing unit from data-carrier store, and to indicate in the simulation status control word be front-wheel or trailing wheel;
The initial address of attachment coefficient table is called in and preset to central processing unit from data-carrier store;
The front and rear wheel wheelbase of vehicle is called in and preset to central processing unit from data-carrier store; With vehicle's center of gravity point height; With
The horizontal range of vehicle's center of gravity point and hind axle;
Opening HSO interrupts;
Carry out the serial ports initialization;
Link order is called the place.
Referring to Fig. 3.The working routine of initialization subroutine is to finish the following step successively: disabled interrupt at first; From data-carrier store, call in the initial motion state parameter of vehicle then successively, comprise the moment of inertia and the effective radius of initial level speed, initial level retarded velocity, initial level angular deceleration and this wheel of this wheel; The initial angle speed of calculating this wheel according to the horizontal velocity and the effective radius of this wheel; From data-carrier store, call in the structural parameters of vehicle again, comprise the number of teeth of car load gross mass, focus point height, wheel signal dish; From data-carrier store, call in the simulation status control word then, point out that in the simulation status control word this wheel is front-wheel or trailing wheel; Call in the initial address of attachment coefficient table from data-carrier store, the attachment coefficient table is to be the tables of data that relative address is looked into this slip rate corresponding attachment coefficient with the slip rate data converted, will use the start address of attachment coefficient table in the recursive calculation of back; Preset front and back wheel wheelbase, focus point height and with the horizontal range of rear axle; Carry out then and open the HSO interruption; Carry out the serial ports initialization; Last link order is called the place.
The signal simulation method of above-mentioned vehicle anti-lock brake system wheel speed signal real time simulation device, the process step of its HSO Interrupt Process subroutine is:
Disabled interrupt at first;
Central processing unit presets 0 a channel reset time that does not cause the HSO of interruption, produces the negative edge of vehicle speed signal pulse with this;
Carry out the A/D conversion of brake pressure;
Calculate the time Δ T that angle that this wheel under the current angular velocity turns over a tooth needs;
Central processing unit presets 0 a passage set time counter value T who causes the HSO of interruption
I+1=T
i+ Δ T, T
iRepresent this HSO set to interrupt the moment of taking place;
Call the recursive calculation subroutine, in this subroutine, utilize T
iKinematic parameter constantly calculates T
I+1Kinematic parameter;
Open interruption;
Link order is called the place.
Referring to Fig. 4.The step that HSO Interrupt Process subroutine is carried out is: first disabled interrupt; Preset 0 a channel reset time that does not cause the HSO of interruption then, effect is the negative edge that produces the vehicle speed signal pulse; Carry out brake pressure signal A/D conversion then, the recursive calculation below the brake pressure value that its transformation result is calculated as this round participates in; Calculating this wheel under current angular velocity turns over the time value Δ T of the angle needs of a tooth, and presets 0 a passage set time counter value T who causes the HSO of interruption by central processing unit
I+1=T
i+ Δ T, T
iRepresent this HSO set to interrupt the moment of taking place; Call the recursive calculation subroutine then, in this subroutine, utilize T
iKinematic parameter constantly calculates T
I+1Kinematic parameter; Open interruption then; Last link order is called the place.
The signal simulation method of above-mentioned vehicle anti-lock brake system wheel speed signal real time simulation device, the process step of its recursive calculation subroutine is:
Disabled interrupt at first;
Calculate wheel and turn to next signal teeth T constantly constantly by the current demand signal tooth
I+1Corresponding horizontal velocity;
Calculate wheel and turn to next signal teeth T constantly constantly by the current demand signal tooth
I+1Corresponding angular velocity;
Calculate wheel and turn to next signal teeth T constantly constantly by the current demand signal tooth
I+1Corresponding horizontal retarded velocity;
Calculate wheel and turn to next signal teeth T constantly constantly by the current demand signal tooth
I+1Corresponding angular deceleration;
Carry out data transfer, T
I+1The horizontal velocity of this corresponding wheel, angular velocity, horizontal retarded velocity, angular deceleration prepare to carry out when HSO interrupts next time recursive calculation as current horizontal velocity, angular velocity, horizontal retarded velocity, angular deceleration;
Open interruption;
Link order is called the place.
Referring to Fig. 5.The execution in step of recursive calculation subroutine is: first disabled interrupt; Calculate this wheel then and turn to next signal teeth T constantly constantly by the current demand signal tooth
I+1Corresponding horizontal velocity is simplified calculating for improving system real time, and being set in and turning to i+1 tooth vehicle from i tooth is with T
iHorizontal velocity and horizontal retarded velocity are done uniformly retarded motion constantly, and the horizontal retarded velocity of vehicle also will add the horizontal retarded velocity component (this device is to receive the horizontal retarded velocity component that other wheel brings by serial ports) that other wheel brings except the component that this wheel brings; Calculate this wheel then and turn to next signal teeth T constantly constantly by the current demand signal tooth
I+1Corresponding angular velocity, being set in equally and turning to i+1 this wheel of tooth from i tooth is by T
iAngular velocity and angle constantly adds (subtracting) speed and does even speed change rotation; Calculate this wheel again and turn to next signal teeth T constantly constantly by the current demand signal tooth
I+1The horizontal retarded velocity component that this corresponding wheel brings; Calculate this wheel at last and turn to the corresponding constantly angular deceleration of next signal teeth constantly by the current demand signal tooth; After data computation finishes, carry out data transfer, T
I+1The horizontal velocity of this corresponding wheel, angular velocity, horizontal retarded velocity, angular deceleration prepare to carry out when HSO interrupts next time recursive calculation as current horizontal velocity, angular velocity, horizontal retarded velocity, angular deceleration; Open interruption then; Link order is called the place.
The signal simulation method of above-mentioned vehicle anti-lock brake system wheel speed signal real time simulation device, the process step of its serial received Interrupt Process subroutine is:
Disabled interrupt at first;
Receive the horizontal retarded velocity component of other wheel in the vehicle;
Open interruption;
Link order is called the place
Referring to Fig. 6.The execution in step of serial received Interrupt Process subroutine is a disabled interrupt at first; Receive the horizontal retarded velocity component that other wheel of car load brings then; After receiving, open out interruption; Last link order is called the place.
Claims (9)
1, a kind of vehicle anti-lock brake system wheel speed signal real time simulation device is characterized in that: it comprises central processing unit, pressure transducer, parallel EEPROM data-carrier store, program storage, data latches, phase inverter, serial interface circuit, crystal oscillating circuit, reset circuit, power module, reference power supply, output circuit; Central processing unit is connected with pressure transducer, parallel EEPROM data-carrier store, program storage, data latches, phase inverter, serial interface circuit, crystal oscillating circuit, reset circuit, power module, reference power supply, output circuit respectively.
2, a kind of vehicle anti-lock brake system wheel speed signal real time simulation device according to claim 1 is characterized in that: the non-end of CE of the P4.7 port of described central processing unit and program storage is connected; Be connected to a phase inverter between central processing unit and the parallel EEPROM data-carrier store, the P4.7 port of central processing unit and an end of phase inverter are connected, and the non-end of CE of the other end of phase inverter and parallel EEPROM data-carrier store is connected; The P4.0 of central processing unit～P4.6 port is connected with the A8～A14 port of parallel EEPROM data-carrier store, program storage respectively; The 1D of the P3.0 of central processing unit～P3.7 port and data latches～8D port is connected; The P3.0 of central processing unit～P3.7 port also is connected with the D0～D7 port of parallel EEPROM data-carrier store, program storage; The 1Q of data latches～8Q port is connected with the A0～A7 port of parallel EEPROM data-carrier store, program storage respectively.
3, a kind of signal simulation method of vehicle anti-lock brake system wheel speed signal real time simulation device as claimed in claim 1, the main flow of its running program comprise initialization subroutine, HSO Interrupt Process subroutine, recursive calculation subroutine, serial received Interrupt Process subroutine.
4, a kind of signal simulation method of vehicle anti-lock brake system wheel speed signal real time simulation device as claimed in claim 3, the process step of its master routine is:
After the beginning, central processing unit is at first put stack pointer, and sends disable interrupt instruction;
Call initialization subroutine;
Start 0 passage of HSO, is set first setting time;
Open interruption;
Enter the idle loop state, wait for and interrupt taking place.
5, a kind of signal simulation method of vehicle anti-lock brake system wheel speed signal real time simulation device as claimed in claim 3, the process step of its initialization subroutine is:
Disabled interrupt at first; The register zero clearing;
Vehicle is called in and preset to central processing unit from data-carrier store
The initial level speed of this wheel; With
The initial level retarded velocity of this wheel; With
The initial level angular deceleration of this wheel; With
The moment of inertia of this wheel; With
The effective radius of this wheel;
The initial angle speed that central processing unit calculates this wheel according to the initial level speed and the effective radius of this wheel;
Vehicular gross combined weight is called in and preset to central processing unit from data-carrier store; With
Vehicle's center of gravity point height; With
The signal panels number of teeth of wheel;
The simulation status control word is called in and preset to central processing unit from data-carrier store, and to indicate in the simulation status control word be front-wheel or trailing wheel;
The initial address of attachment coefficient table is called in and preset to central processing unit from data-carrier store;
The front and rear wheel wheelbase of vehicle is called in and preset to central processing unit from data-carrier store; With
Vehicle's center of gravity point height; With
The horizontal range of vehicle's center of gravity point and hind axle;
Opening HSO interrupts;
Carry out the serial ports initialization;
Link order is called the place.
6, a kind of signal simulation method of vehicle anti-lock brake system wheel speed signal real time simulation device as claimed in claim 3, the process step of its HSO Interrupt Process subroutine is:
Disabled interrupt at first;
Central processing unit presets 0 a channel reset time that does not cause the HSO of interruption, produces the negative edge of vehicle speed signal pulse with this;
Carry out the A/D conversion of brake pressure;
Calculate the time Δ T that angle that this wheel under the current angular velocity turns over a tooth needs;
Central processing unit presets 0 a passage set time counter value T who causes the HSO of interruption
I+1=T
i+ Δ T, T
iRepresent this HSO set to interrupt the moment of taking place;
Call the recursive calculation subroutine, in this subroutine, utilize T
iKinematic parameter constantly calculates T
I+1Kinematic parameter;
Open interruption;
Link order is called the place.
7, a kind of signal simulation method of vehicle anti-lock brake system wheel speed signal real time simulation device as claimed in claim 3, the process step of its recursive calculation subroutine is:
Disabled interrupt at first;
Calculate wheel and turn to next signal teeth T constantly constantly by the current demand signal tooth
I+1Corresponding horizontal velocity;
Calculate wheel and turn to next signal teeth T constantly constantly by the current demand signal tooth
I+1Corresponding angular velocity;
Calculate wheel and turn to next signal teeth T constantly constantly by the current demand signal tooth
I+1Corresponding horizontal retarded velocity;
Calculate wheel and turn to next signal teeth T constantly constantly by the current demand signal tooth
I+1Corresponding angular deceleration;
Carry out data transfer, T
I+1The horizontal velocity of this corresponding wheel, angular velocity, horizontal retarded velocity, angular deceleration prepare to carry out when HSO interrupts next time recursive calculation as current horizontal velocity, angular velocity, horizontal retarded velocity, angular deceleration;
Open interruption;
Link order is called the place.
8, a kind of signal simulation method of vehicle anti-lock brake system wheel speed signal real time simulation device as claimed in claim 3, the process step of its serial received Interrupt Process subroutine is:
Disabled interrupt at first;
Receive the horizontal retarded velocity component of other wheel in the vehicle;
Open interruption;
Link order is called the place.
9, according to a kind of vehicle anti-lock brake system wheel speed signal real time simulation device according to claim 1, it is characterized in that: the model of described central processing unit is INTEL80C196KB/KC; The model of described parallel EEPROM data-carrier store is AT28C256; The model of described program storage is 27C256; The model of described data latches is 74LS373; The model of described phase inverter is 74LS04.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410081217 CN1603776A (en) | 2004-11-05 | 2004-11-05 | Wheel speed signal real time simulation device and method for vehicle anti-lock brake system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410081217 CN1603776A (en) | 2004-11-05 | 2004-11-05 | Wheel speed signal real time simulation device and method for vehicle anti-lock brake system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102201016A (en) * | 2010-03-22 | 2011-09-28 | 上海通用汽车有限公司 | Method for modeling and simulating door lock system based on vehicle crash safety |
| CN103345158A (en) * | 2013-06-27 | 2013-10-09 | 中国重型机械研究院股份公司 | Ventilating disc type brake test stand and electric inertia simulating control method thereof |
-
2004
- 2004-11-05 CN CN 200410081217 patent/CN1603776A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102201016A (en) * | 2010-03-22 | 2011-09-28 | 上海通用汽车有限公司 | Method for modeling and simulating door lock system based on vehicle crash safety |
| CN102201016B (en) * | 2010-03-22 | 2013-08-14 | 上海通用汽车有限公司 | Method for modeling and simulating door lock system based on vehicle crash safety |
| CN103345158A (en) * | 2013-06-27 | 2013-10-09 | 中国重型机械研究院股份公司 | Ventilating disc type brake test stand and electric inertia simulating control method thereof |
| CN103345158B (en) * | 2013-06-27 | 2016-04-13 | 中国重型机械研究院股份公司 | Ventilation disk brake testing table and electric inertia simulation control method thereof |
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