CN208827925U - A kind of electric steering column rack gear terminal protection system - Google Patents
A kind of electric steering column rack gear terminal protection system Download PDFInfo
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- CN208827925U CN208827925U CN201821423964.7U CN201821423964U CN208827925U CN 208827925 U CN208827925 U CN 208827925U CN 201821423964 U CN201821423964 U CN 201821423964U CN 208827925 U CN208827925 U CN 208827925U
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- controller
- differential circuit
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- rack gear
- protection system
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Abstract
The utility model discloses a kind of electric steering column rack gear terminal protection systems, including steering angle sensor, vehicle speed sensor, controller, the angle signal of acquisition is respectively fed to the first differential circuit by the steering angle sensor, controller, the output end of first differential circuit and the input terminal of controller connect, the speed signal of acquisition is sent in controller by the vehicle speed sensor, the protection system further includes the second differential circuit, the output end of first differential circuit is connect with the input terminal of the second differential circuit, the output end of second differential circuit and the input terminal of controller connect, the controller output controls electric current to steering motor.Utility model has the advantages that introducing the acceleration signal of steering angle, acceleration signal can be used as the reference value of stress variation, system adjusts the size of current of output according to acceleration signal on the original basis, can accurate output motor size of current, more closing to reality operating condition.
Description
Technical field
The utility model relates to electric power steering field, in particular to a kind of electric steering column rack gear terminal protection system
System.
Background technique
Along with the progress of science and technology, auto electricization has been trend of the times, and the technological achievement of many electrical aspects is by gradually
It applies on automobile, the manipulation quality of automobile, security performance is allowed all to have obtained significantly being promoted.The important shadow steady as automobile behaviour
The factor of sound, the steering system impacted outstanding weight of institute, electric steering column rack gear terminal protection, even more from tradition during electrification
The means of dependence block protection terminal upgrade to relevant treatment carried out to signal to playing protection terminal by system control
Means.
Electric power steering, when rack gear is moved to preterminal setting range, if control system detects that steering wheel turns
Dynamic torque direction is consistent with wheel steering angle direction, i.e., hand-power can drive rack gear to hit terminal rather than terminal is prevented to hit
It hits, terminal protection strategy will be triggered unlatching at this time, which obtains Vehicular status signal, and main signal has: traveling speed
Degree, steering angle, steering angular velocity (this signal pass through to steering angle carry out first differential acquisition), by these signals come
Automotive service operating condition is segmented, so that the electric current reduction value that controller inputs to motor be calculated, which is equivalent to
The negative value of running current, the current value is bigger, then the actual current value for injecting motor is smaller, corresponding motor output torque
It is smaller with output revolving speed, motor torque and revolving speed are reduced before rack gear contacts mechanical terminations in advance in this way, reduce rack gear to end
The shock dynamics at end.This conventional measures, the quantization of electric current reduction value is by introducing travel speed, steering angle and steering angle
Speed (this signal is by carrying out first differential acquisition to steering angle), from this quantification manner, when steering system work
When changing as state, variation is embodied on revolving speed first, and the variation of revolving speed is to carry out on the basis of hand-power variation to the time
Integral obtain, this indicate that by revolving speed variation come reflect the working condition of steering system have one it is temporal stagnant
Afterwards, the presence of this section of lag is substantially system senses with respect to the lag that driver is intended to.This lag can allow driver
Hand-power variation is relatively lofty, causes feel not fine and smooth enough.This strategy cannot reach expected effect for certain operating conditions very well simultaneously
Fruit, for example, into terminal protection region, at this moment occurring emergency situations before the slow steering wheel rotation to extreme position of driver, driving
The person of sailing prolongs the rotation direction along before and suddenly beats steering wheel, and at this moment since acceleration distance is short, the integrated acceleration time is short, and generation turns
It is smaller to angular speed, thus the weakening electric current generated will be markedly less than desired value, so that the dynamics of shock becomes larger.This operating condition very unwise move
The feedback slightly made is obviously to be unsatisfactory for actual requirement.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of electric steering column rack gear terminal protection systems
System, is introduced into the input signal of steering angle acceleration into controller, to improve the accuracy that controller exports into motor electric current,
Improve user experience.
To achieve the goals above, a kind of the technical solution adopted by the present invention are as follows: electric steering column rack gear terminal protection
System, including steering angle sensor, vehicle speed sensor, controller, the steering angle sensor distinguish the angle signal of acquisition
It is sent to the first differential circuit, controller, the output end of first differential circuit and the input terminal of controller connect, the vehicle
The speed signal of acquisition is sent in controller by fast sensor, and the protection system further includes the second differential circuit, and first is micro-
The output end of parallel circuit is connect with the input terminal of the second differential circuit, the output end of second differential circuit and controller it is defeated
Enter end connection, the controller output control electric current to steering motor.
The input terminal of controller is arranged in series filter circuit, and the input signal of controller is sent to control after filter circuit
In device.
The controller is the electronic control unit ECU of electric power steering.
The signal that vehicle speed sensor, steering angle sensor acquire is transferred to controller by vehicle local area network.
First differential circuit, the second differential circuit are integrated in the controller.
Utility model has the advantages that introducing the acceleration signal of steering angle, acceleration signal can be used as stress
The reference value of variation, system adjust the size of current of output according to acceleration signal on the original basis, can accurately export
The size of current of motor, reduces or eliminates the lag of system senses and hand-power variation, and the current value under this mode will more be sticked on
Nearly actual condition demand makes the transition of driver's hand-power more gentle naturally, also may be implemented under special operation condition to rack gear terminal
Protection.
Detailed description of the invention
Below to each width attached drawing of description of the invention expression content and figure in label be briefly described:
Fig. 1 is the utility model structure principle chart.
Specific embodiment
A specific embodiment of the invention is made further detailed below against attached drawing by the description to optimum embodiment
Thin explanation.
A kind of electric steering column rack gear terminal protection system, including steering angle sensor, vehicle speed sensor, controller,
For steering angle sensor by the angle signal of acquisition by being sent in controller after filter circuit, it is micro- that angle signal also passes through first
Parallel circuit obtains steering angular velocity signal after carrying out differential process, and the output end of the first differential circuit is through filter circuit and controller
Input terminal connection, steering angular velocity signal is sent in microcontroller after filter circuit, the output end of the first differential circuit
It is connect with the input terminal of the second differential circuit, steering angular velocity signal is sent in the second differential circuit simultaneously, the second differential electricity
The output end on road is connect after filter circuit with the input terminal of controller, and the second differential circuit carries out steering angular velocity at differential
Reason obtains steering angle acceleration signal, is then sent in controller after filter circuit；Vehicle speed sensor is by the speed of acquisition
Signal is sent in controller, and the signal inputted in controller at this time includes speed signal, angle signal, angular velocity signal, angle
Speed acceleration signals carries out the control signal of output control motor speed using these signals as input.Signal is controlled by limit
Target current is exported after width to control the revolving speed of motor.The angle signal of acquisition is sent into the first of controller by steering angle sensor
Differential circuit, angle signal generate angular velocity signal after the processing of the first differential circuit, which is introduced to controller
Signal processing is carried out in subsequent conditioning circuit, while the speed signal is introduced to the second differential circuit and carries out signal processing, angular speed letter
The angular acceleration signal that obtains also assists in the follow-up signal processing of controller number after the processing of the second differential circuit, corresponding to believe
Number after processing, output control electric current is to steering motor.Controller passes through internal soft stop function current calculation module logarithm
According to processing analytical judgment is carried out, final steering electrode current is obtained, the obtained electric current actually calculated is logical for the prior art
It crosses the electric current that three input parameters calculate and a calibration amendment then is carried out to this electric current, be such as directed on the basis of original electric current
Different angular acceleration does different revisions to electric current, and the corresponding amendment data of different angular acceleration are stored in controller, controls
Device only needs to do corrected parameter plus-minus budget, to realize output electric current amendment.
Controller is the electronic control unit ECU of electric power steering.The letter that vehicle speed sensor, steering angle sensor acquire
Number controller is transferred to by vehicle local area network.Certainly, vehicle speed sensor, rotary angle transmitter using it is vehicle-mounted itself sensor come
It realizes, the data of onboard sensor acquisition can exist in the corresponding controller of each sensor, and vehicle local area network, which receives, to be come
The signal issued from each controller module of vehicle, to obtain angle signal and speed signal from each controller of vehicle.This
In the first differential circuit, " first ", " second " are just to distinguish two differential circuits in the second differential circuit, not to circuit
Actually limit, actually two differential circuits can use identical differential circuit.
It introduces to steering angle acceleration is obtained after steering angle second differential, what angular acceleration reflected is the variation of hand-power
Value can thus eliminate the time lag turned between hand-power and steering angular velocity, allow system senses and driver to be intended to same
Step keeps hand-power variation fine and smooth.Simultaneously under certain special operation conditions, when driver beats direction mutation steering force along script is slow,
System can perceive the variation of hand-power immediately, and correcting current value can be to avoid larger impact force, effective protection rack gear terminal.
Here the acceleration signal introduced can be by pre- to the amendment of the electric current originally obtained by " angle, speed, angular speed " three
First experimental calibration, only on the basis of original, when by realizing to demarcate different acceleration, electric current correction value is how many, shape
It is stored in electronic control unit ECU at calibrating parameters, and output current value can be called automatically at work, to realize
Four input parameters to control the electric current of motor, reduce the damage to rack gear.
This patent is to make full use of the angular signal captured, increases differential circuit in the controller, carries out two to it
Subdifferential generates acceleration signal, is introduced into control system, and acceleration signal can be considered as the reference value of hand-power variation, control
When system processed introduces signal accounting reduction electric current, different Weakening degrees are corresponded to by demarcating different acceleration, so as to root
Current of electric output is weakened according to acceleration, can effectively eliminate the lag of system senses and hand-power variation, under this mode
Current value will more closing to reality operating condition, make the transition of driver's hand-power more gentle naturally, also may be implemented it is right under special operation condition
The protection of rack gear terminal.
Obviously present invention specific implementation is not subject to the restrictions described above, as long as using method concept and skill of the invention
The improvement for the various unsubstantialities that art scheme carries out, it is within the scope of the present invention.
Claims (5)
1. a kind of electric steering column rack gear terminal protection system, including steering angle sensor, vehicle speed sensor, controller, institute
It states steering angle sensor the angle signal of acquisition is respectively fed to the first differential circuit, controller, first differential circuit
Output end and the input terminal of controller connect, the speed signal of acquisition is sent in controller by the vehicle speed sensor,
Be characterized in that: the protection system further includes the second differential circuit, the output end of the first differential circuit and the second differential circuit
Input terminal connection, the output end of second differential circuit and the input terminal of controller connect, the controller output control electricity
It flow to steering motor.
2. a kind of electric steering column rack gear terminal protection system as described in claim 1, it is characterised in that: controller it is defeated
Enter end and be arranged in series filter circuit, the input signal of controller is sent in controller after filter circuit.
3. a kind of electric steering column rack gear terminal protection system as claimed in claim 1 or 2, it is characterised in that: the control
Device processed is the electronic control unit ECU of electric power steering.
4. a kind of electric steering column rack gear terminal protection system as claimed in claim 1 or 2, it is characterised in that: speed passes
The signal that sensor, steering angle sensor acquire is transferred to controller by vehicle local area network.
5. a kind of electric steering column rack gear terminal protection system as described in claim 1, it is characterised in that: described first is micro-
Parallel circuit, the second differential circuit are integrated in the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821423964.7U CN208827925U (en) | 2018-08-31 | 2018-08-31 | A kind of electric steering column rack gear terminal protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821423964.7U CN208827925U (en) | 2018-08-31 | 2018-08-31 | A kind of electric steering column rack gear terminal protection system |
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| Publication Number | Publication Date |
|---|---|
| CN208827925U true CN208827925U (en) | 2019-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821423964.7U Active CN208827925U (en) | 2018-08-31 | 2018-08-31 | A kind of electric steering column rack gear terminal protection system |
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| Country | Link |
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| CN (1) | CN208827925U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113195340A (en) * | 2019-11-26 | 2021-07-30 | 日本精工株式会社 | Steering control device |
-
2018
- 2018-08-31 CN CN201821423964.7U patent/CN208827925U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113195340A (en) * | 2019-11-26 | 2021-07-30 | 日本精工株式会社 | Steering control device |
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