WO2018177367A1 - 车辆的行驶控制方法、装置和车辆 - Google Patents

车辆的行驶控制方法、装置和车辆 Download PDF

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Publication number
WO2018177367A1
WO2018177367A1 PCT/CN2018/081074 CN2018081074W WO2018177367A1 WO 2018177367 A1 WO2018177367 A1 WO 2018177367A1 CN 2018081074 W CN2018081074 W CN 2018081074W WO 2018177367 A1 WO2018177367 A1 WO 2018177367A1
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WIPO (PCT)
Prior art keywords
vehicle
path
preview
target
turning
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2018/081074
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English (en)
French (fr)
Inventor
岳志阳
和林
王天培
葛建勇
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Great Wall Motor Co Ltd
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Great Wall Motor Co Ltd
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Publication date
Application filed by Great Wall Motor Co Ltd filed Critical Great Wall Motor Co Ltd
Priority to US16/499,860 priority Critical patent/US11161507B2/en
Publication of WO2018177367A1 publication Critical patent/WO2018177367A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D6/00Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D6/00Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits
    • B62D6/008Control of feed-back to the steering input member, e.g. simulating road feel in steer-by-wire applications
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/10Path keeping
    • B60W30/12Lane keeping
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00Conjoint control of vehicle sub-units of different type or different function
    • B60W10/20Conjoint control of vehicle sub-units of different type or different function including control of steering systems
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/02Control of vehicle driving stability
    • B60W30/045Improving turning performance
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D15/00Steering not otherwise provided for
    • B62D15/02Steering position indicators ; Steering position determination; Steering aids
    • B62D15/025Active steering aids, e.g. helping the driver by actively influencing the steering system after environment evaluation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00Input parameters relating to overall vehicle dynamics
    • B60W2520/06Direction of travel
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00Input parameters relating to overall vehicle dynamics
    • B60W2520/10Longitudinal speed
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00Input parameters relating to overall vehicle dynamics
    • B60W2520/10Longitudinal speed
    • B60W2520/105Longitudinal acceleration
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2552/00Input parameters relating to infrastructure
    • B60W2552/53Road markings, e.g. lane marker or crosswalk
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2554/00Input parameters relating to objects
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00Output or target parameters relating to a particular sub-units
    • B60W2710/20Steering systems
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00Output or target parameters relating to a particular sub-units
    • B60W2710/20Steering systems
    • B60W2710/207Steering angle of wheels
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2720/00Output or target parameters relating to overall vehicle dynamics
    • B60W2720/12Lateral speed
    • B60W2720/125Lateral acceleration

Definitions

  • the present invention relates to the technical field of automobiles, and in particular, to a driving control method, device and vehicle for a vehicle.
  • PID portion integration integration
  • the embodiment of the present invention proposes a travel control method, apparatus and vehicle for the vehicle.
  • a driving control method for a vehicle including:
  • the plurality of driving states including a plurality of driving directions
  • the traveling direction is adjusted in accordance with the change information of the steering wheel angle to control the vehicle to travel from the original position along the turning path to the target path.
  • the driving state further includes a driving speed
  • the step of separately previewing the vehicle from the original position of the lane in the plurality of driving directions, and obtaining the plurality of preview paths includes:
  • a path obtained by the vehicle traveling from the original position at the traveling speed in the traveling direction for a certain period of time is predicted as a preview path.
  • the step of fitting the turning path of the vehicle from the original position to the target path in the lane according to the plurality of preview paths comprises:
  • a turning path in which the vehicle travels from the original position to the target position is fitted.
  • the step of selecting a target position deviating from the preview path in the target path of the lane comprises:
  • the deviation condition is that a path between the preview position and the preview position constitutes a preview deviation, and the preview deviation is perpendicular to the preview path.
  • the step of fitting the turning path of the vehicle from the original position to the target position comprises:
  • a turning path in which the vehicle travels from the original position to the target position is fitted based on the steering center.
  • the step of calculating the change information of the steering wheel angle by using the plurality of turning paths comprises:
  • the change information is calculated using the plurality of steering wheel angles.
  • the driving state further includes a first distance and a second distance, wherein the first distance is a distance of a left wheel of the vehicle from a left lane line of the lane, and the second distance is the vehicle The distance of the right wheel from the right lane line of the lane;
  • the step of calculating a plurality of turning radii of the plurality of turning paths includes:
  • the turning radius of the turning path is calculated using the target distance.
  • a travel control device for a vehicle includes:
  • a driving state detecting module configured to detect a plurality of driving states of the vehicle, the plurality of driving states including a plurality of driving directions;
  • a driving preview module configured to respectively perform a preview on the vehicle from the original position of the lane in the driving direction to obtain a plurality of preview paths
  • a turn path fitting module configured to fit a plurality of turn paths of the vehicle traveling from the original position to the target path in the lane according to the plurality of preview paths;
  • a steering wheel angle calculation module configured to calculate change information of a steering wheel angle by using the plurality of turning paths
  • the traveling direction adjustment module is configured to adjust the traveling direction according to the change information of the steering wheel angle to control the vehicle to travel from the original position along the turning path to the target path.
  • the driving state further includes a driving speed
  • the driving preview module includes:
  • the driving section prediction sub-module is configured to predict a path obtained by the vehicle traveling from the original position of the lane at the traveling speed in the traveling direction for a period of time as a preview path.
  • the turning path fitting module comprises:
  • a target position selection module configured to select a target position deviating from the preview path among target paths of the lane
  • a target position fitting module configured to fit a turning path of the vehicle traveling from the original position to the target position.
  • the target location selection submodule comprises:
  • a preview position selection module configured to select a preview position in the preview path
  • Deviating from the position selection module configured to select a position in the target path of the lane that satisfies a preset deviation condition as a target position deviating from the preview path;
  • the deviation condition is that a path between the preview position and the preview position constitutes a preview deviation, and the preview deviation is perpendicular to the preview path.
  • the target location fitting module comprises:
  • a steering center setting module configured to set a steering center in a vertical direction of the traveling direction
  • a steering center fitting module configured to fit a turning path of the vehicle from the home position to the target position based on the steering center.
  • the steering wheel angle calculation module comprises:
  • a radius calculation module configured to calculate a plurality of turning radii of the plurality of turning paths
  • a corner calculation module configured to calculate a plurality of steering wheel angles by using the plurality of turning radii
  • the change information calculation module is configured to calculate change information by using the plurality of steering wheel angles.
  • the driving state further includes a first distance and a second distance, wherein the first distance is a distance of a left wheel of the vehicle from a left lane line of the lane, and the second distance is the vehicle The distance of the right wheel from the right lane line of the lane;
  • the radius calculation module includes:
  • a driving deviation calculation module configured to calculate a running deviation of the vehicle from the target path between the first distance and the second distance
  • a preview deviation calculation module configured to calculate a preview deviation of the target position from the preview path by using the traveling direction, the preview path, and the driving deviation;
  • a target distance calculation module configured to calculate a target distance between the original position and the target position by using the preview deviation
  • the turning radius calculation module is configured to calculate a turning radius of the turning path by using the target distance.
  • a vehicle comprising:
  • a sensor configured to detect a plurality of driving states of the vehicle, the plurality of driving states including a plurality of driving directions;
  • a controller configured to respectively preview the vehicle from the original position of the lane in the plurality of driving directions to obtain a plurality of preview paths; and fit the vehicle from the lane according to the plurality of preview paths a turning position of the target path to the target path in the lane; calculating the change information of the steering wheel angle by using the plurality of turning paths;
  • An electric steering system configured to adjust the traveling direction according to the change information of the steering wheel angle to control the vehicle to travel from the original position along the turning path to the target position.
  • the senor comprises at least one of the following:
  • a speed sensor configured to detect a traveling speed of the vehicle as a driving state.
  • a camera for detecting a traveling direction, a first distance, and a second distance of the vehicle as a driving state.
  • the first distance is a distance of a left wheel of the vehicle from a left lane line of the lane
  • the second distance is a distance of a right wheel of the vehicle from a right lane line of the lane.
  • the driving state further includes a traveling speed; the controller is further configured to:
  • a path obtained by the vehicle traveling from the original position of the lane at the traveling speed in the traveling direction for a period of time is predicted as a pre-tracking path.
  • the controller is further configured to:
  • a turning path in which the vehicle travels from the original position to the target position is fitted.
  • the controller is further configured to:
  • the deviation condition is that a path between the preview position and the preview position constitutes a preview deviation, and the preview deviation is perpendicular to the preview path.
  • the controller is further configured to:
  • a turning path in which the vehicle travels from the original position to the target position is fitted based on the steering center.
  • the controller is further configured to:
  • the change information is calculated using the plurality of steering wheel angles.
  • the driving state further includes a first distance and a second distance, wherein the first distance is a distance of a left wheel of the vehicle from a left lane line of the lane, and the second distance is the vehicle The distance of the right wheel from the right lane line of the lane; the controller is further configured to:
  • the turning radius of the turning path is calculated using the target distance.
  • a computer readable medium storing a computer program for executing a travel control method of the above vehicle is provided.
  • the embodiment of the invention predicts the motion state of the vehicle, previews the preview path of the future driving, and deviates according to the preview path, and fits the turning path of the vehicle from the original position to the target path, and uses the future preview path as the future preview path.
  • the target adjusts the current steering wheel angle, which can achieve the effect of advance adjustment, so that the vehicle can return to the target path of the lane, and avoid adjustment according to the empirical value, and the turning path obtained based on the deviation of the preview path is larger, and the centripetal force at the turn is reduced, Reduce the possibility of slipping, ensure the stability of driving while maintaining a certain driving speed, effectively alleviate the problems of overshoot and shock, and improve the driver's comfort.
  • FIG. 1 is a flow chart showing the steps of a travel control method for a vehicle according to an embodiment of the present invention
  • FIG. 2 is a schematic view showing the driving of a vehicle according to an embodiment of the present invention.
  • FIG. 3 is a flow chart showing the steps of a travel control method of another vehicle according to an embodiment of the present invention.
  • FIG. 4 is a flow chart showing the steps of calculating a turning radius according to an embodiment of the present invention.
  • Figure 5 is a schematic view showing the travel of another vehicle according to an embodiment of the present invention.
  • FIG. 6 is a block diagram showing the structure of a travel control device for a vehicle according to an embodiment of the present invention.
  • Figure 7 is a block diagram showing the structure of a vehicle according to an embodiment of the present invention.
  • FIG. 8 is a block diagram schematically showing a structural configuration of a computing device for executing a travel control method of a vehicle according to the present invention.
  • Fig. 9 schematically shows a computer readable medium for holding or carrying program code implementing the travel control of a vehicle according to the present invention.
  • FIG. 1 a flow chart of steps of a travel control method for a vehicle according to an embodiment of the present invention is shown, which may specifically include the following steps:
  • step 101 a plurality of driving states of the vehicle are detected.
  • sensors are integrated in the vehicle, such as speed sensors, acceleration sensors, angular velocity sensors, cameras, etc., and these sensors can be called to detect the running state of the vehicle.
  • the speed sensor can detect the traveling speed of the vehicle as a driving state.
  • the camera can detect the direction of travel of the vehicle, the first distance, and the second distance as the driving state.
  • the first distance is the distance of the left wheel of the vehicle from the left lane line of the lane
  • the second distance is the distance of the right wheel of the vehicle from the right lane line of the lane.
  • sensors and the detected driving state are only examples. In the embodiment of the present invention, other sensors and their detected driving states may be set according to actual conditions, which is not limited in the embodiment of the present invention. In addition, in addition to the above-mentioned sensors and the detected driving state, those skilled in the art can also use other sensors and their detected driving states according to actual needs, which is not limited in the embodiment of the present invention.
  • a target path is set in the lane, for example, a center line of the lane, and if the vehicle travels along the target path, the safety of driving can be improved.
  • other paths may be set as the target path, for example, a path within a certain range (for example, 20 cm) of the center line of the lane, and the like, which is not limited by the embodiment of the present invention.
  • the vehicle travels in the lane. At a certain moment, the vehicle travels to the original position in the lane. The original position is often outside the target path. At this time, the original position has deviated from the target path, and it is necessary to control the vehicle to return to the target path.
  • the original position where the vehicle is located may refer to the location where the center point of the vehicle is located, and may also refer to the location where the other parts of the vehicle are located, such as the position of the vehicle head, etc., etc. limit.
  • the left lane line 201, the right lane line 202, the set center line 203 is the target path, and the vehicle travels to point A in the lane 200, then point A
  • the current direction of travel of the vehicle is AP.
  • This example is a general case where the vehicle deviates from the center line 203 of the lane 200, that is, the point A deviates from the center line 203, and the traveling direction AP deviates from the center line 203.
  • the indication is performed in an enlarged manner.
  • the range of the point A from the center line 203 is [-1 m, 1 m]
  • the range of the traveling direction AP from the center line 203 is [-7°, 7°].
  • Step 102 Pre-panning the vehicle from the original position of the lane in the plurality of driving directions to obtain a plurality of preview paths.
  • each driving state includes one traveling direction, that is, the plurality of driving states include a plurality of traveling directions.
  • the driver usually considers the road information within a certain distance from the front of the vehicle in addition to the current road conditions of the vehicle, obtains certain predictability, and adjusts the vehicle in advance to obtain good control effect. .
  • the vehicle can be predicted to travel in the direction of travel from the original position, and the distance traveled for a certain period of time can be used as the preview path.
  • the vehicle travels from point A in the direction of travel AP, traveling a section of the path, which is the pre-tracking path AC.
  • Step 103 Fitting a plurality of turning paths of the vehicle from the original position to a target path in the lane according to the plurality of preview paths.
  • the deviation can be made based on the preview path to fit the turning path of the vehicle from the original position to the target path, and at this time, the turning path is large.
  • a turning path ie, an arc AB, traveling from the original position A to the centerline 203 of the lane 200 may be fitted based on the preview distance AC.
  • Step 104 Calculate change information of a steering wheel angle by using the plurality of turning paths.
  • the steering wheel angle can be calculated by applying a turning path based on the principle of the transmission system of the vehicle.
  • Step 105 Adjust the traveling direction according to the change information of the steering wheel angle to control the vehicle to travel from the original position along the turning path to the target path.
  • the controller may send a corner command to an EPS (Electric Power Steering) based on a steering wheel angle every certain frequency/time (eg, 50 Hz/20 ms), and the EPS performs a corresponding corner operation, that is, each new one.
  • EPS Electronic Power Steering
  • the new steering wheel angle is calculated according to the state of the vehicle, and the time is repeated. The time is corrected according to the current vehicle condition, so that the vehicle can well maintain the target path in the lane.
  • the steering wheel angle can be converted into a voltage signal and transmitted to an ECU (Electronic Control Unit).
  • the ECU issues a control command to the motor and the clutch, that is, outputs a suitable one to the motor.
  • the current when the clutch is combined, causes the motor drive to generate a torque, which is applied to the output shaft after the clutch and the speed reduction mechanism connected to the motor are decelerated and increased, and the lower end of the output shaft and the rack and pinion steering gear are The centered pinion gears are connected so that the torque from the motor is finally applied to the steering mechanism of the vehicle via the rack and pinion steering gear to achieve a suitable steering assist.
  • the embodiment of the invention predicts the motion state of the vehicle, previews the preview path of the future driving, and deviates according to the preview path, and fits the turning path of the vehicle from the original position to the target path, and uses the future preview path as the future preview path.
  • the target adjusts the current steering wheel angle, which can achieve the effect of advance adjustment, so that the vehicle can return to the target path of the lane, and avoid adjustment according to the empirical value, and the turning path obtained based on the deviation of the preview path is larger, and the centripetal force at the turn is reduced, Reduce the possibility of slipping, ensure the stability of driving while maintaining a certain driving speed, effectively alleviate the problems of overshoot and shock, and improve the driver's comfort.
  • FIG. 3 there is shown a flow chart of a step of a travel control method of another vehicle according to an embodiment of the present invention, wherein a target path is set in a lane, and the vehicle travels to an original position in the lane,
  • the method may specifically include the following steps:
  • Step 301 detecting a plurality of driving states of the vehicle.
  • the driving state includes a traveling direction, a traveling speed, a first distance, and a second distance.
  • the first distance is the distance of the left wheel of the vehicle from the left lane line of the lane
  • the second distance is the distance of the right wheel of the vehicle from the right lane line of the lane.
  • Step 302 Predict a path obtained by the vehicle traveling from the original position of the lane at the traveling speed in the traveling direction for a period of time as a preview path.
  • the preview path is generally a line segment.
  • Step 303 Select a target position deviating from the preview path in a target path of the lane.
  • the target path may be considered to be formed by a curve fitting by discrete positions, and a target position may be selected among the discrete positions, which may indicate a deviation of the target path from the preview path.
  • the preview position may be selected in the preview path, and the position that satisfies the preset deviation condition is selected in the target path of the lane as the target position deviating from the preview path.
  • the deviation condition is that the path between the position and the preview position constitutes a preview deviation, and the preview deviation is perpendicular to the preview path.
  • the vehicle line can be selected as the preview position by the driving speed and the position that is finally traveled in the traveling direction for a certain period of time.
  • Step 304 fitting a turning path of the vehicle from the original position to the target position.
  • the steering center may be set in the vertical direction of the traveling direction, and the turning path of the vehicle traveling from the original position to the target position is fitted based on the steering center.
  • the wheels when the vehicle is turning, the wheels are rolled without sliding, and the wheels can be rotated about a center point, which can be the steering center.
  • This steering center generally falls on the extension line of the center line of the rear axle, and the left and right front wheels rotate with the steering center as the center.
  • the steering center is located in the vertical direction of the traveling direction, and the fitted turning path is circular, so that the traveling direction is a tangent to the turning path.
  • Step 305 Calculate a plurality of turning radii of the plurality of turning paths.
  • the turning radius of the vehicle may refer to the radius of the trajectory circle on the outer side of the tire to the center of the tread when the vehicle performs a circular motion.
  • the turning radius is usually related to the wheelbase of the car, the track and the limit angle of the steering wheel.
  • the first distance, the second distance, the preview distance, and the traveling direction may be used, and the turning radius of the turning path is calculated by the geometric relationship.
  • step 305 can include the following sub-steps:
  • Sub-step S11 calculating a running deviation of the vehicle from the target path between the first distance and the second distance.
  • the deviation of the vehicle from the target path may refer to the distance from the center point of the vehicle to the target path.
  • Sub-step S12 calculating a preview deviation of the target position from the preview path by using the traveling direction, the preview path, and the running deviation.
  • the driving direction and the preview path are known values, and the distance from the target path can be calculated from the geometrical relationship by the geometrical deviation to obtain the preview deviation.
  • Sub-step S13 calculating a target distance between the original position and the target position by using the preview deviation.
  • the target distance between the original position and the target position can be calculated by the geometric relationship.
  • Sub-step S14 calculating a turning radius of the turning path by using the target distance.
  • the turning radius of the turning path can be calculated by the geometric relationship.
  • the original position is A
  • the traveling direction is AP
  • the preview distance is AC
  • the target position is B
  • BC is the pre-target deviation
  • BC ⁇ AC the pre-target deviation
  • AB the target distance
  • the vertical line AE is set to be an auxiliary line passing through the original position A and parallel to the lane line of the lane and/or the center line of the lane, and the vertical line AE intersects the pre-measurement deviation BC at point E.
  • the horizontal line AF is set to be an auxiliary line that passes through the original position A and is perpendicular to the lane line of the lane and/or the center line of the lane.
  • the center line of the horizontal line AF lane is at point F, that is, AF is the driving deviation, AF ⁇ AE.
  • the selection point O is the steering center (ie, the center of the circle), and the turning path from the original position A to the target position B is fitted, that is, ⁇ O.
  • the direction of the lane line is set to a positive value counterclockwise toward the centerline of the vehicle, and a clockwise negative value.
  • the angle between the traveling direction AP and the lane line is detected as ⁇ , and the pre-targeting distance AC is calculated as P by the product of the traveling speed and the pre-targeting time.
  • the first distance is l
  • the second distance is r
  • the width of the vehicle is w
  • AF is y
  • the turning radius OA/OB is R
  • Step 306 calculating a plurality of steering wheel angles by using the plurality of turning radii.
  • the ratio between the wheelbase and the steering radius can be calculated to obtain the steering angle of the front wheel; the product between the steering angle of the front wheel and the steering gear ratio is calculated to obtain the steering wheel angle.
  • Step 307 Calculate the change information by using the plurality of steering wheel angles.
  • information on the change in the steering wheel angle can be determined, such as gradually increasing, gradually decreasing, constant, and the like.
  • Step 308 adjusting the traveling direction according to the change information of the steering wheel angle to control the vehicle to travel from the original position along the turning path to the target position.
  • the controller may send a corner command to the EPS, and the EPS performs a corresponding corner operation so that the vehicle can travel to the target position and keep driving on the target path in the lane.
  • FIG. 6 there is shown a block diagram of a structure of a travel control apparatus for a vehicle according to an embodiment of the present invention, which may specifically include the following modules:
  • a driving state detecting module 601 configured to detect a plurality of driving states of the vehicle, the plurality of driving states including a plurality of driving directions;
  • the driving preview module 602 is configured to separately preview the vehicle from the original position of the lane in the driving direction to obtain a plurality of preview paths;
  • the turning path fitting module 603 is configured to fit a plurality of turning paths of the vehicle from the original position to the target path in the lane according to the plurality of preview paths;
  • the steering wheel angle calculation module 604 is configured to calculate change information of the steering wheel angle by using the plurality of turning paths;
  • the traveling direction adjustment module 605 is configured to adjust the traveling direction according to the change information of the steering wheel angle to control the vehicle to travel from the original position along the turning path to the target path.
  • the driving state further includes a driving speed
  • the driving preview module 602 includes:
  • the driving section prediction module is configured to predict a path obtained by the vehicle traveling from the original position of the lane at the traveling speed in the traveling direction for a period of time as a preview path.
  • the turning path fitting module 603 includes:
  • a target position selection module configured to select a target position deviating from the preview path among target paths of the lane
  • a target position fitting module configured to fit a turning path of the vehicle traveling from the original position to the target position.
  • the target location selection module includes:
  • a preview position selection module configured to select a preview position in the preview path
  • Deviating from the position selection module configured to select a position in the target path of the lane that satisfies a preset deviation condition as a target position deviating from the preview path;
  • the deviation condition is that a path between the preview position and the preview position constitutes a preview deviation, and the preview deviation is perpendicular to the preview path.
  • the target location fitting module comprises:
  • a steering center setting module configured to set a steering center in a vertical direction of the traveling direction
  • a steering center fitting module configured to fit a turning path of the vehicle from the home position to the target position based on the steering center.
  • the steering wheel angle calculation module 604 includes:
  • a radius calculation module configured to calculate a plurality of turning radii of the plurality of turning paths
  • a corner calculation module configured to calculate a plurality of steering wheel angles by using the plurality of turning radii
  • the change information calculation module is configured to calculate change information by using the plurality of steering wheel angles.
  • the driving state further includes a first distance and a second distance, the first distance being a distance of a left wheel of the vehicle from a left lane line of the lane, the first The two distances are the distances of the right wheel of the vehicle from the right lane line of the lane;
  • the radius calculation module includes:
  • a driving deviation calculation module configured to calculate a running deviation of the vehicle from the target path between the first distance and the second distance
  • a preview deviation calculation module configured to calculate a preview deviation of the target position from the preview path by using the traveling direction, the preview path, and the driving deviation;
  • a target distance calculation module configured to calculate a target distance between the original position and the target position by using the preview deviation
  • the turning radius calculation module is configured to calculate a turning radius of the turning path by using the target distance.
  • the embodiment of the invention predicts the motion state of the vehicle, previews the preview path of the future driving, and deviates according to the preview path, and fits the turning path of the vehicle from the original position to the target path, and uses the future preview path as the future preview path.
  • the target adjusts the current steering wheel angle, which can achieve the effect of advance adjustment, so that the vehicle can return to the target path of the lane, and avoid adjustment according to the empirical value, and the turning path obtained based on the deviation of the preview path is larger, and the centripetal force at the turn is reduced, Reduce the possibility of slipping, ensure the stability of driving while maintaining a certain driving speed, effectively alleviate the problems of overshoot and shock, and improve the driver's comfort.
  • FIG. 7 a structural block diagram of a vehicle according to an embodiment of the present invention is shown, which may specifically include:
  • a sensor 701 configured to detect a plurality of driving states of the vehicle, the plurality of driving states including a plurality of driving directions;
  • the controller 702 is configured to respectively preview the vehicle from the original position of the lane in the plurality of driving directions, obtain a plurality of preview paths, and fit the vehicle from the lane according to the plurality of preview paths. Driving the original position to a turning path of the target path in the lane; calculating the change information of the steering wheel angle by using the plurality of turning paths;
  • the electric steering system 703 is configured to adjust the traveling direction according to the change information of the steering wheel angle to control the vehicle to travel from the original position along the turning path to the target position.
  • the sensor 701 comprises at least one of the following:
  • a speed sensor configured to detect a traveling speed of the vehicle as a driving state.
  • the camera is configured to detect a traveling direction, a first distance, and a second distance of the vehicle as a driving state.
  • the first distance is a distance of a left wheel of the vehicle from a left lane line of the lane
  • the second distance is a distance of a right wheel of the vehicle from a right lane line of the lane.
  • the driving state further includes a traveling speed; the controller 702 is further configured to:
  • a path obtained by the vehicle traveling from the original position of the lane at the traveling speed in the traveling direction for a period of time is predicted as a pre-tracking path.
  • controller 702 is further configured to:
  • a turning path in which the vehicle travels from the original position to the target position is fitted.
  • controller 702 is further configured to:
  • the deviation condition is that a path between the preview position and the preview position constitutes a preview deviation, and the preview deviation is perpendicular to the preview path.
  • controller 702 is further configured to:
  • a turning path in which the vehicle travels from the original position to the target position is fitted based on the steering center.
  • controller 702 is further configured to:
  • the change information is calculated using the plurality of steering wheel angles.
  • the driving state further includes a first distance and a second distance, the first distance being a distance of a left wheel of the vehicle from a left lane line of the lane, the first The second distance is the distance of the right wheel of the vehicle from the right lane line of the lane; the controller 702 is further configured to:
  • the turning radius of the turning path is calculated using the target distance.
  • the embodiment of the invention predicts the motion state of the vehicle, previews the preview path of the future driving, and deviates according to the preview path, and fits the turning path of the vehicle from the original position to the target path, and uses the future preview path as the future preview path.
  • the target adjusts the current steering wheel angle, which can achieve the effect of advance adjustment, so that the vehicle can return to the target path of the lane, and avoid adjustment according to the empirical value, and the turning path obtained based on the deviation of the preview path is larger, and the centripetal force at the turn is reduced, Reduce the possibility of slipping, ensure the stability of driving while maintaining a certain driving speed, effectively alleviate the problems of overshoot and shock, and improve the driver's comfort.
  • embodiments of the embodiments of the invention may be provided as a method, apparatus, or computer program product.
  • embodiments of the invention may be in the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware.
  • embodiments of the invention may take the form of a computer program product embodied on one or more computer usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • Embodiments of the invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG.
  • These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing terminal device to produce a machine such that instructions are executed by a processor of a computer or other programmable data processing terminal device
  • Means are provided for implementing the functions specified in one or more of the flow or in one or more blocks of the flow chart.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing terminal device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the instruction device implements the functions specified in one or more blocks of the flowchart or in a flow or block of the flowchart.
  • FIG. 8 shows a computer that can implement the travel control method of the vehicle according to the present invention.
  • the computer can be placed on a vehicle that acts as a computing device on the vehicle.
  • the computer traditionally includes a processor 810 and a computer program product or computer readable medium in the form of a memory 820.
  • the memory 820 may be an electronic memory such as a flash memory, an EEPROM (Electrically Erasable Programmable Read Only Memory), an EPROM, a hard disk, or a ROM.
  • Memory 820 has a memory space 830 for program code 831 for performing any of the method steps described above.
  • storage space 830 for program code may include various program code 831 for implementing various steps in the above methods, respectively.
  • the program code can be read from or written to one or more computer program products.
  • These computer program products include program code carriers such as hard disks, compact disks (CDs), memory cards or floppy disks.
  • Such a computer program product is typically a portable or fixed computer readable medium as described with reference to FIG.
  • the computer readable medium as a storage unit may have a storage section, a storage space, and the like arranged similarly to the storage 820 in the mobile terminal of FIG.
  • the program code can be compressed, for example, in an appropriate form.
  • a computer readable recording medium includes computer readable code 831', ie, code readable by a processor, such as 810, that when executed by a computer causes the computer to perform the methods described above Each step.
  • Computer readable media includes any mechanism for storing or transmitting information in a computer readable form.
  • a computer readable recording medium includes a read only memory, a random access memory, a magnetic disk storage medium, a flash storage medium, an electrical, optical, acoustic or other form of propagation signal (eg, carrier wave, infrared signal, digital signal, etc.) and the like.

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Abstract

一种车辆的行驶控制方法,包括:检测车辆的多个行驶状态,多个行驶状态包括多个行驶方向;分别对车辆从车道原始位置沿多个行驶方向行驶进行预瞄,获得多个预瞄路径;根据多个预瞄路径拟合车辆从原始位置行驶至车道中目标路径的多个转弯路径;采用多个转弯路径计算方向盘转角的变化信息;按照方向盘转角的变化信息调整行驶方向,以控制车辆从原始位置沿转弯路径向目标路径行驶。还公开了一种采用该行驶控制方法的装置和车辆。该方法使得车辆可以回归车道的目标路径,并且避免根据经验值进行调节,保证行车的稳定性,有效减缓出现超调、震荡的问题,提高驾驶员的舒适度。

Description

车辆的行驶控制方法、装置和车辆 技术领域
本发明涉及汽车的技术领域,特别涉及一种车辆的行驶控制方法、装置和车辆。
背景技术
随着科技的发展,交通安全问题越来越凸显,车辆的安全被细化,可以分为主动安全和被动安全。
在一种主动安全的技术中,车辆在行驶时,如果车辆的中心位置超出车道的中心线较多,采用PID(proportionintegrationdifferentiation,比例-积分-微分)调节的方式,给方向盘施加一定的力矩,使车辆转向,回归车道的中心线。
PID调节中比例、积分和微分环节的各个参数一般是根据经验进行设置,准确率较低,参数的值经常出现过大的情况,导致出现超调、震荡等问题,驾驶员的舒适度较低。
发明内容
鉴于上述问题,为了解决上述通过PID调节控制车辆回归车道的中心位置容易出现超调、震荡的问题,本发明实施例提出了一种车辆的行驶控制方法、装置和车辆。
依据本发明的一个方面,提供了一种车辆的行驶控制方法,包括:
检测车辆的多个行驶状态,所述多个行驶状态包括多个行驶方向;
分别对所述车辆从车道的原始位置沿所述多个行驶方向行驶进行预瞄,获得多个预瞄路径;
根据所述多个预瞄路径拟合所述车辆从所述原始位置行驶至所述车道中目标路径的多个转弯路径;
采用所述多个转弯路径计算方向盘转角的变化信息;
按照所述方向盘转角的变化信息调整所述行驶方向,以控制所述车辆从所述原始位置沿所述转弯路径向所述目标路径行驶。
优选地,所述行驶状态还包括行驶速度;
所述分别对所述车辆从车道的原始位置沿所述多个行驶方向行驶进行预瞄,获得多个预瞄路径的步骤包括:
预测所述车辆从所述原始位置以所述行驶速度沿所述行驶方向行驶一段时间获得的路径,作为预瞄路径。
优选地,所述根据所述多个预瞄路径拟合所述车辆从所述原始位置行驶至所述车道中目标路径的转弯路径的步骤包括:
在所述车道的目标路径中选择偏离所述预瞄路径的目标位置;
拟合所述车辆从所述原始位置行驶至所述目标位置的转弯路径。
优选地,所述在所述车道的目标路径中选择偏离所述预瞄路径的目标位置的步骤包括:
在所述预瞄路径中选择预瞄位置;
在所述车道的目标路径中选择满足预设的偏离条件的位置,作为偏离所述预瞄路径的目标位置;
其中,所述偏离条件为,与所述预瞄位置之间的路径组成预瞄偏差,所述预瞄偏差垂直于所述预瞄路径。
优选地,所述拟合所述车辆从所述原始位置行驶至所述目标位置的转弯路径的步骤包括:
在所述行驶方向的垂直方向上设定转向中心;
基于所述转向中心拟合所述车辆从所述原始位置行驶至所述目标位置的转弯路径。
优选地,述采用所述多个转弯路径计算方向盘转角的变化信息的步骤包括:
计算所述多个转弯路径的多个转弯半径;
采用所述多个转弯半径计算多个方向盘转角;
采用所述多个方向盘转角计算变化信息。
优选地,所述行驶状态还包括第一距离和第二距离,所述第一距离为所述车辆的左车轮距所述车道的左侧车道线的距离,所述第二距离为所述车辆的右车轮距所述车道的右侧车道线的距离;
所述计算所述多个转弯路径的多个转弯半径的步骤包括:
采用所述第一距离和所述第二距离之间计算所述车辆偏离所述目标路径的行驶偏差;
采用所述行驶方向、所述预瞄路径和所述行驶偏差计算所述目标位置偏离所述预瞄路径的预瞄偏差;
采用所述预瞄偏差计算所述原始位置与所述目标位置之间的目标距离;
采用所述目标距离计算所述转弯路径的转弯半径。
根据本发明的另一方面,提供了一种车辆的行驶控制装置,包括:
行驶状态检测模块,配置为检测车辆的多个行驶状态,所述多个行驶状态包括多个行驶方向;
行驶预瞄模块,配置为分别对所述车辆从车道的原始位置沿所述行驶方向行驶进行预瞄,获得多个预瞄路径;
转弯路径拟合模块,配置为根据所述多个预瞄路径拟合所述车辆从所述原始位置行驶至所述车道中目标路径的多个转弯路径;
方向盘转角计算模块,配置为采用所述多个转弯路径计算方向盘转角的变化信息;
行驶方向调整模块,配置为按照所述方向盘转角的变化信息调整所述行驶方向,以控制所述车辆从所述原始位置沿所述转弯路径向所述目标路径行驶。
优选地,所述行驶状态还包括行驶速度;所述行驶预瞄模块包括:
行驶路段预测子模块,配置为预测所述车辆从车道的原始位置以所述行驶速度沿所述行驶方向行驶一段时间获得的路径,作为预瞄路径。
优选地,所述转弯路径拟合模块包括:
目标位置选择模块,配置为在所述车道的目标路径中选择偏离所述预瞄 路径的目标位置;
目标位置拟合模块,配置为拟合所述车辆从所述原始位置行驶至所述目标位置的转弯路径。
优选地,所述目标位置选择子模块包括:
预瞄位置选择模块,配置为在所述预瞄路径中选择预瞄位置;
偏离位置选择模块,配置为在所述车道的目标路径中选择满足预设的偏离条件的位置,作为偏离所述预瞄路径的目标位置;
其中,所述偏离条件为,与所述预瞄位置之间的路径组成预瞄偏差,所述预瞄偏差垂直于所述预瞄路径。
优选地,所述目标位置拟合模块包括:
转向中心设定模块,配置为在所述行驶方向的垂直方向上设定转向中心;
转向中心拟合模块,配置为基于所述转向中心拟合所述车辆从所述原始位置行驶至所述目标位置的转弯路径。
优选地,所述方向盘转角计算模块包括:
半径计算模块,配置为计算所述多个转弯路径的多个转弯半径;
转角计算模块,配置为采用所述多个转弯半径计算多个方向盘转角;
变化信息计算模块,配置为采用所述多个方向盘转角计算变化信息。
优选地,所述行驶状态还包括第一距离和第二距离,所述第一距离为所述车辆的左车轮距所述车道的左侧车道线的距离,所述第二距离为所述车辆的右车轮距所述车道的右侧车道线的距离;
所述半径计算模块包括:
行驶偏差计算模块,配置为采用所述第一距离和所述第二距离之间计算所述车辆偏离所述目标路径的行驶偏差;
预瞄偏差计算模块,配置为采用所述行驶方向、所述预瞄路径和所述行驶偏差计算所述目标位置偏离所述预瞄路径的预瞄偏差;
目标距离计算模块,配置为采用所述预瞄偏差计算所述原始位置与所述目标位置之间的目标距离;
转弯半径计算模块,配置为采用所述目标距离计算所述转弯路径的转弯 半径。
根据本发明的另一方面,提供了一种车辆,包括:
传感器,配置为检测车辆的多个行驶状态,所述多个行驶状态包括多个行驶方向;
控制器,配置为分别对所述车辆从车道的原始位置沿所述多个行驶方向行驶进行预瞄,获得多个预瞄路径;根据所述多个预瞄路径拟合所述车辆从车道的原始位置行驶至所述车道中目标路径的转弯路径;采用所述多个转弯路径计算方向盘转角的变化信息;
电动转向系统,配置为按照所述方向盘转角的变化信息调整所述行驶方向,以控制所述车辆从所述原始位置沿所述转弯路径向所述目标位置行驶。
优选地,所述传感器包括以下的至少一种:
速度传感器,配置为检测所述车辆的行驶速度,作为行驶状态。
摄像头,用于检测所述车辆的行驶方向、第一距离和第二距离,作为行驶状态。
其中,所述第一距离为所述车辆的左车轮距所述车道的左侧车道线的距离,所述第二距离为所述车辆的右车轮距所述车道的右侧车道线的距离。
优选地,所述行驶状态还包括行驶速度;所述控制器还配置为:
预测所述车辆从车道的原始位置以所述行驶速度沿所述行驶方向行驶一段时间获得的路径,作为预瞄路径。
优选地,所述控制器还配置为:
在所述车道的目标路径中选择偏离所述预瞄路径的目标位置;
拟合所述车辆从所述原始位置行驶至所述目标位置的转弯路径。
优选地,所述控制器还配置为:
在所述预瞄路径中选择预瞄位置;
在所述车道的目标路径中选择满足预设的偏离条件的位置,作为偏离所述预瞄路径的目标位置;
其中,所述偏离条件为,与所述预瞄位置之间的路径组成预瞄偏差,所 述预瞄偏差垂直于所述预瞄路径。
优选地,所述控制器还配置为:
在所述行驶方向的垂直方向上设定转向中心;
基于所述转向中心拟合所述车辆从所述原始位置行驶至所述目标位置的转弯路径。
优选地,所述控制器还配置为:
计算所述多个转弯路径的多个转弯半径;
采用所述多个转弯半径计算多个方向盘转角;
采用所述多个方向盘转角计算变化信息。
优选地,所述行驶状态还包括第一距离和第二距离,所述第一距离为所述车辆的左车轮距所述车道的左侧车道线的距离,所述第二距离为所述车辆的右车轮距所述车道的右侧车道线的距离;所述控制器还配置为:
采用所述第一距离和所述第二距离之间计算所述车辆偏离所述目标路径的行驶偏差;
采用所述行驶方向、所述预瞄路径和所述行驶偏差计算所述目标位置偏离所述预瞄路径的预瞄偏差;
采用所述预瞄偏差计算所述原始位置与所述目标位置之间的目标距离;
采用所述目标距离计算所述转弯路径的转弯半径。
根据本发明的再一方面,提供一种计算机可读介质,其中存储了用于执行上述车辆的行驶控制方法的计算机程序。
本发明实施例包括以下优点:
本发明实施例对车辆的运动状态进行预测,预瞄未来行驶的预瞄路径,并且根据预瞄路径进行偏离,拟合车辆从原始位置行驶至目标路径的转弯路径,以未来的预瞄路径作为目标调节当前方向盘转角,可以实现到提前调节的作用,使得车辆可以回归车道的目标路径,并且避免根据经验值进行调节,而基于预瞄路径偏离获得的转弯路径较大,减少转弯时的向心力,减少打滑的可能,在保持一定行驶速度的情况下,保证行车的稳定性,有效减缓出现 超调、震荡的问题,提高驾驶员的舒适度。
附图说明
图1是本发明一个实施例的一种车辆的行驶控制方法的步骤流程图;
图2是本发明一个实施例的一种车辆的行驶示意图;
图3是本发明一个实施例的另一种车辆的行驶控制方法的步骤流程图;
图4是本发明一个实施例的一种计算转弯半径的步骤流程图;
图5是本发明一个实施例的另一种车辆的行驶示意图;
图6是本发明一个实施例的一种车辆的行驶控制装置的结构框图;
图7是本发明一个实施例的一种车辆的结构框图;
图8示意性地示出了用于执行根据本发明的车辆的行驶控制方法的计算设备的结构框图;以及
图9示意性地示出了用于保持或者携带实现根据本发明的车辆的行驶控制的程序代码的计算机可读介质。
具体实施方式
为使本发明的上述目的、特征和优点能够更加明显易懂,下面结合附图和具体实施方式对本发明作进一步详细的说明。
参照图1,示出了本发明一个实施例的一种车辆的行驶控制方法的步骤流程图,具体可以包括如下步骤:
步骤101,检测车辆的多个行驶状态。
在实际应用中,在车辆中集成了多种传感器,例如,速度传感器、加速度传感器、角速度传感器、摄像头,等等,调用这些传感器,可以检测车辆的行驶状态。
在一个示例中,速度传感器,可以检测车辆的行驶速度,作为行驶状态。
在另一个示例中,摄像头,可以检测车辆的行驶方向、第一距离和第二距离,作为行驶状态。
其中,第一距离为车辆的左车轮距车道的左侧车道线的距离,第二距离 为车辆的右车轮距车道的右侧车道线的距离。
当然,上述传感器及其检测的行驶状态只是作为示例,在实施本发明实施例时,可以根据实际情况设置其他传感器及其检测的行驶状态,本发明实施例对此不加以限制。另外,除了上述传感器及其检测的行驶状态外,本领域技术人员还可以根据实际需要采用其它传感器及其检测的行驶状态,本发明实施例对此也不加以限制。
在本发明实施例中,在车道中设定有目标路径,例如,车道的中心线,若车辆沿该目标路径行驶,可以提高行驶的安全性。
当然,除了车道的中心线之外,还可以设置其他路径为目标路径,例如,在车道的中心线一定范围(如20cm)内的路径,等等,本发明实施例对此不加以限制。
车辆在车道上行驶,在某一时刻,车辆行驶至车道中的原始位置,该原始位置往往位于目标路径外,此时,原始位置已经偏离目标路径,需要控制车辆驶回目标路径。
需要说明的是,车辆所在的原始位置,可以指车辆的中心点所在的位置,也可以指车辆的其他部位所在的位置,如车头所载的位置,等等,本发明实施例对此不加以限制。
在一个示例中,如图2所示,在车道200中,左侧车道线201,右侧车道线202,设定中心线203为目标路径,车辆行驶至车道200中的点A,则点A为原始位置,车辆当前的行驶方向为AP。
此示例是一种车辆偏离车道200的中心线203的普遍情况,即点A偏离中心线203,行驶方向AP偏离中心线203,为详细描述本发明实施例的实现,故采取放大的方式进行标示,使清晰明白,在实际中,点A偏离中心线203的范围为[-1m,1m],行驶方向AP偏离中心线203的范围为[-7°,7°]。
步骤102,分别对所述车辆从车道的原始位置沿所述多个行驶方向行驶进行预瞄,获得多个预瞄路径。
在本发明实施例中,每个行驶状态中包括一个行驶方向,即多个行驶状态包括多个行驶方向。
驾驶员在驾驶过程中,通常除了观察车辆当前的道路状况之外,还会同时考虑车辆前方一定距离范围内的道路信息,获得一定的预见性,提前对车辆进行调整,从而获得良好的控制效果。
在车辆的控制器中,可以对车辆从原始位置沿行驶方向行驶进行预测,将未来一段时间行驶的距离作为预瞄路径。
在一个示例中,如图2所示,假设车辆从点A沿行驶方向AP行驶,行驶一段路径,该路径为预瞄路径AC。
步骤103,根据所述多个预瞄路径拟合所述车辆从所述原始位置行驶至所述车道中目标路径的多个转弯路径。
在车辆的控制器中,可以基于预瞄路径进行偏离,拟合车辆从原始位置行驶至目标路径的转弯路径,此时,转弯路径较大。
在一个示例中,如图2所示,可以基于预瞄距离AC拟合从原始位置A行驶到车道200的中心线203的转弯路径,即弧AB。
车辆转弯时,向心力是由地面摩擦力提供,根据圆周运动定律,车辆的转弯路径越大,所需要的向心力越小,如果转弯半径太小,所需要的向心力很大,超过了地面摩擦力最大值,车辆就会发生打滑。
因此,转弯路径越大,车辆行驶会越稳定,在保持一定行驶速度的情况下,沿圆弧的转弯路径行驶,可以保证行车的稳定性。
步骤104,采用所述多个转弯路径计算方向盘转角的变化信息。
在车辆的控制器中,可以基于车辆的传动系统的原理,应用转弯路径计算方向盘转角。
步骤105,按照所述方向盘转角的变化信息调整所述行驶方向,以控制所述车辆从所述原始位置沿所述转弯路径向所述目标路径行驶。
在具体实现中,控制器可以每间隔一定的频率/时间(如50HZ/20ms),基于方向盘转角向EPS(ElectricPowerSteering,电动转向系统)发送转角命令,EPS执行相应的转角操作,即每一个新的时刻,根据车辆的状态计算新的方向盘转角,周而复始,时刻根据当前车况对行驶的误差进行修正,使得车辆可以很好地保持在车道中的目标路径上行驶。
进一步而言,方向盘转角可以转换为一个电压信号,传输到ECU(Electronic Control Unit,电子控制单元)中,经过其运算处理后,由ECU向电动机和离合器发出控制指令,即向其输出一个合适的电流,在离合器结合的同时使电动机传动产生一个转矩,该转矩与电动机连接在一起的离合器、减速机构减速增距后,施加在输出轴上,输出轴的下端与齿轮齿条转向器总成中的小齿轮相连,于是由电动机发出的转矩最后通过齿轮齿条转向器施加到车辆的转向机构上,使之得到一个相适应的转向助力。
本发明实施例对车辆的运动状态进行预测,预瞄未来行驶的预瞄路径,并且根据预瞄路径进行偏离,拟合车辆从原始位置行驶至目标路径的转弯路径,以未来的预瞄路径作为目标调节当前方向盘转角,可以实现到提前调节的作用,使得车辆可以回归车道的目标路径,并且避免根据经验值进行调节,而基于预瞄路径偏离获得的转弯路径较大,减少转弯时的向心力,减少打滑的可能,在保持一定行驶速度的情况下,保证行车的稳定性,有效减缓出现超调、震荡的问题,提高驾驶员的舒适度。
参照图3,示出了本发明一个实施例的另一种车辆的行驶控制方法的步骤流程图,其中,在车道中设定有目标路径,所述车辆行驶至所述车道中的原始位置,该方法具体可以包括如下步骤:
步骤301,检测车辆的多个行驶状态。
在本发明实施例中,行驶状态包括行驶方向、行驶速度、第一距离和第二距离。
其中,第一距离为车辆的左车轮距车道的左侧车道线的距离,第二距离为车辆的右车轮距车道的右侧车道线的距离。
步骤302,预测所述车辆从车道的原始位置以所述行驶速度沿所述行驶方向行驶一段时间获得的路径,作为预瞄路径。
在本发明实施例中,可以以当前的行驶速度下,沿当前的行驶方向行驶一段时间(如1.2s-1.5s)的路径,作为预瞄路径,因此,该预瞄路径一般为线段。
步骤303,在所述车道的目标路径中选择偏离所述预瞄路径的目标位置。
在具体实现中,可以认为目标路径是由离散的位置通过曲线拟合形成的,在这些离散的位置中可以选择一目标位置,可以表示目标路径对于预瞄路径的偏离。
在一种实施方式中,可以在预瞄路径中选择预瞄位置,在车道的目标路径中选择满足预设的偏离条件的位置,作为偏离预瞄路径的目标位置。
其中,偏离条件为,与预瞄位置之间的路径组成预瞄偏差,预瞄偏差垂直于预瞄路径。
一般情况下,可以选择车辆行以该行驶速度、沿该行驶方向行驶一段时间最后到达的位置,作为预瞄位置。
当然,除了最后到达的位置之外,也可以在预瞄路径中选择其他的位置作为预瞄位置,本发明实施例对此不加以限制。
步骤304,拟合所述车辆从所述原始位置行驶至所述目标位置的转弯路径。
在车辆的控制器中,可以拟合车辆从原始位置行驶至目标位置的转弯路径。
在一种实施方式中,可以在行驶方向的垂直方向上设定转向中心,基于转向中心拟合车辆从原始位置行驶至目标位置的转弯路径。
在此实施方式中,车辆在转向时,要使各车轮滚动而不滑动,各车轮可以围绕一个中心点转动,该中心点可以成为转向中心。
这个转向中心一般落在后轴中心线的延长线上,并且左、右前轮以这个转向中心为圆心而转动。
在本发明实施例中,转向中心位于行驶方向的垂直方向上,拟合的转弯路径为圆形,使得行驶方向为该转弯路径的切线。
步骤305,计算所述多个转弯路径的多个转弯半径。
车辆的转弯半径可以指,当车辆进行圆周运动时,车辆外侧转向轮胎面中心在平整地面上的轨迹圆半径。
转弯半径通常与汽车的轴距、轮距及转向轮的极限转角等因素相关。
一般情况下,轴距、轮距越大,转弯半径也越大;转向轮的极限转角越大,转弯半径就越小。
在本发明实施例中,可以采用第一距离、第二距离、预瞄距离、行驶方向,通过几何关系计算转弯路径的转弯半径。
在一种实施方式中,如图4所示,步骤305可以包括如下子步骤:
子步骤S11、采用所述第一距离和所述第二距离之间计算所述车辆偏离所述目标路径的行驶偏差。
一般情况下,车辆偏离目标路径的行驶偏差,可以指车辆的中心点距离目标路径的距离。
因此,可以以第一距离和第二距离之间差值的一半,设置为车辆偏离目标路径的行驶偏差。
子步骤S12、采用所述行驶方向、所述预瞄路径和所述行驶偏差计算所述目标位置偏离所述预瞄路径的预瞄偏差。
在实际应用中,行驶方向、预瞄路径为已知的数值,可以与行驶偏差通过几何关系计算出目标位置偏离预瞄路径的距离,获得预瞄偏差。
子步骤S13、采用所述预瞄偏差计算所述原始位置与所述目标位置之间的目标距离。
在原始位置、目标位置和预瞄位置之间组成的区域中,可以通过几何关系计算原始位置与目标位置之间的目标距离。
子步骤S14、采用所述目标距离计算所述转弯路径的转弯半径。
在原始位置、目标位置和转向中心之间组成的区域中,可以通过几何关系计算转弯路径的转弯半径。
为使本领域技术人员更好地理解本发明实施例,以下通过具体的示例来说明本发明实施例中转弯半径的计算方法。
如图5所示,原始位置为A、行驶方向为AP,预瞄距离为AC、目标位置为B,即BC为预瞄偏差,BC⊥AC,AB为目标距离。
设置垂直线AE为过原始位置A的、且平行于车道的车道线和/或车道的中心线的辅助线,垂直线AE交预瞄偏差BC于点E。
设置水平线AF为过原始位置A的、且垂直于车道的车道线和/或车道的中心线的辅助线,水平线AF交车道的中心线于点F,即AF为行驶偏差,AF⊥AE。
在行驶方向AP的垂直方向上,选择点O为转向中心(即圆心),拟合从原始位置A行驶至目标位置B的转弯路径,即⊙O。
在⊙O中,OA⊥AC,半径OA交车道的中心线于点G,添加辅助线OD,使得OD⊥AB。
在此示例中,设置车道线方向向车辆的中心线方向靠近逆时针为正值,顺时针为负值。
检测行驶方向AP与车道线的夹角为α,通过行驶速度与预瞄的时间之间的乘积,计算预瞄距离AC为P。
假设第一距离为l,第二距离为r,车辆的宽度为w,AF为y,转弯半径OA/OB为R,那么:
Figure PCTCN2018081074-appb-000001
由于AE平行车道线,因此,∠CAE=α。
在△ACE中,由于∠ACE为直角,因此,CE=AC*tan∠CAE=-P*tan α
由于BC⊥AC,OA⊥AC,即OA//BC,且BG//AE,因此,四边形AEBG为平行四边形,BE=AG。
由于∠FAE和∠CAG为直角,即∠FAG+∠GAE=90°,∠CAE+∠GAE=90°,因此,∠FAG=∠CAE=α。
在△AFG中,
Figure PCTCN2018081074-appb-000002
Figure PCTCN2018081074-appb-000003
Figure PCTCN2018081074-appb-000004
在△ABC中,
Figure PCTCN2018081074-appb-000005
Figure PCTCN2018081074-appb-000006
由于∠ODA和∠CAG为直角,即∠BAC+∠OAD=90°, ∠AOD+∠OAD=90°,因此,∠AOD=∠BAC。
在△AOD中:
Figure PCTCN2018081074-appb-000007
因此:
Figure PCTCN2018081074-appb-000008
步骤306,采用所述多个转弯半径计算多个方向盘转角。
在具体实现中,可以计算轴距与转向半径之间的比值,获得前轮转向角;计算前轮转向角与转向传动比之间的乘积,获得方向盘转角。
假设方向盘转角为δ,轴距为L,转向传动比为i,那么:
Figure PCTCN2018081074-appb-000009
步骤307,采用所述多个方向盘转角计算变化信息。
基于连续的多个方向盘转角,可以确定出方向盘转角的变化信息,如逐渐增大、逐渐减小、不变,等等。
步骤308,按照所述方向盘转角的变化信息调整所述行驶方向,以控制所述车辆从所述原始位置沿所述转弯路径向所述目标位置行驶。
在具体实现中,控制器可以发送转角命令至EPS,EPS执行相应的转角操作,使得车辆可以行驶至目标位置,保持在车道中的目标路径上行驶。
需要说明的是,对于方法实施例,为了简单描述,故将其都表述为一系列的动作组合,但是本领域技术人员应该知悉,本发明实施例并不受所描述的动作顺序的限制,因为依据本发明实施例,某些步骤可以采用其他顺序或者同时进行。其次,本领域技术人员也应该知悉,说明书中所描述的实施例均属于优选实施例,所涉及的动作并不一定是本发明实施例所必须的。
参照图6,示出了本发明一个实施例的一种车辆的行驶控制装置的结构 框图,具体可以包括如下模块:
行驶状态检测模块601,配置为检测车辆的多个行驶状态,所述多个行驶状态包括多个行驶方向;
行驶预瞄模块602,配置为分别对所述车辆从车道的原始位置沿所述行驶方向行驶进行预瞄,获得多个预瞄路径;
转弯路径拟合模块603,配置为根据所述多个预瞄路径拟合所述车辆从所述原始位置行驶至所述车道中目标路径的多个转弯路径;
方向盘转角计算模块604,配置为采用所述多个转弯路径计算方向盘转角的变化信息;
行驶方向调整模块605,配置为按照所述方向盘转角的变化信息调整所述行驶方向,以控制所述车辆从所述原始位置沿所述转弯路径向所述目标路径行驶。
在本发明的一个实施例中,所述行驶状态还包括行驶速度;所述行驶预瞄模块602包括:
行驶路段预测模块,配置为预测所述车辆从车道的原始位置以所述行驶速度沿所述行驶方向行驶一段时间获得的路径,作为预瞄路径。
在本发明的一个实施例中,所述转弯路径拟合模块603包括:
目标位置选择模块,配置为在所述车道的目标路径中选择偏离所述预瞄路径的目标位置;
目标位置拟合模块,配置为拟合所述车辆从所述原始位置行驶至所述目标位置的转弯路径。
在本发明的一个实施例中,所述目标位置选择模块包括:
预瞄位置选择模块,配置为在所述预瞄路径中选择预瞄位置;
偏离位置选择模块,配置为在所述车道的目标路径中选择满足预设的偏离条件的位置,作为偏离所述预瞄路径的目标位置;
其中,所述偏离条件为,与所述预瞄位置之间的路径组成预瞄偏差,所述预瞄偏差垂直于所述预瞄路径。
在本发明的一个实施例中,所述目标位置拟合模块包括:
转向中心设定模块,配置为在所述行驶方向的垂直方向上设定转向中心;
转向中心拟合模块,配置为基于所述转向中心拟合所述车辆从所述原始位置行驶至所述目标位置的转弯路径。
在本发明的一个实施例中,所述方向盘转角计算模块604包括:
半径计算模块,配置为计算所述多个转弯路径的多个转弯半径;
转角计算模块,配置为采用所述多个转弯半径计算多个方向盘转角;
变化信息计算模块,配置为采用所述多个方向盘转角计算变化信息。
在本发明的一个实施例中,所述行驶状态还包括第一距离和第二距离,所述第一距离为所述车辆的左车轮距所述车道的左侧车道线的距离,所述第二距离为所述车辆的右车轮距所述车道的右侧车道线的距离;
所述半径计算模块包括:
行驶偏差计算模块,配置为采用所述第一距离和所述第二距离之间计算所述车辆偏离所述目标路径的行驶偏差;
预瞄偏差计算模块,配置为采用所述行驶方向、所述预瞄路径和所述行驶偏差计算所述目标位置偏离所述预瞄路径的预瞄偏差;
目标距离计算模块,配置为采用所述预瞄偏差计算所述原始位置与所述目标位置之间的目标距离;
转弯半径计算模块,配置为采用所述目标距离计算所述转弯路径的转弯半径。
本发明实施例对车辆的运动状态进行预测,预瞄未来行驶的预瞄路径,并且根据预瞄路径进行偏离,拟合车辆从原始位置行驶至目标路径的转弯路径,以未来的预瞄路径作为目标调节当前方向盘转角,可以实现到提前调节的作用,使得车辆可以回归车道的目标路径,并且避免根据经验值进行调节,而基于预瞄路径偏离获得的转弯路径较大,减少转弯时的向心力,减少打滑的可能,在保持一定行驶速度的情况下,保证行车的稳定性,有效减缓出现超调、震荡的问题,提高驾驶员的舒适度。
参照图7,示出了本发明一个实施例的一种车辆的结构框图,具体可以 包括:
传感器701,配置为检测车辆的多个行驶状态,所述多个行驶状态包括多个行驶方向;
控制器702,配置为分别对所述车辆从车道的原始位置沿所述多个行驶方向行驶进行预瞄,获得多个预瞄路径;根据所述多个预瞄路径拟合所述车辆从车道的原始位置行驶至所述车道中目标路径的转弯路径;采用所述多个转弯路径计算方向盘转角的变化信息;
电动转向系统703,配置为按照所述方向盘转角的变化信息调整所述行驶方向,以控制所述车辆从所述原始位置沿所述转弯路径向所述目标位置行驶。
在本发明的一个实施例中,所述传感器701包括以下的至少一种:
速度传感器,配置为检测所述车辆的行驶速度,作为行驶状态。
摄像头,配置为检测所述车辆的行驶方向、第一距离和第二距离,作为行驶状态。
其中,所述第一距离为所述车辆的左车轮距所述车道的左侧车道线的距离,所述第二距离为所述车辆的右车轮距所述车道的右侧车道线的距离。
在本发明的一个实施例中,所述行驶状态还包括行驶速度;所述控制器702还配置为:
预测所述车辆从车道的原始位置以所述行驶速度沿所述行驶方向行驶一段时间获得的路径,作为预瞄路径。
在本发明的一个实施例中,所述控制器702还配置为:
在所述车道的目标路径中选择偏离所述预瞄路径的目标位置;
拟合所述车辆从所述原始位置行驶至所述目标位置的转弯路径。
在本发明的一个实施例中,所述控制器702还配置为:
在所述预瞄路径中选择预瞄位置;
在所述车道的目标路径中选择满足预设的偏离条件的位置,作为偏离所述预瞄路径的目标位置;
其中,所述偏离条件为,与所述预瞄位置之间的路径组成预瞄偏差,所 述预瞄偏差垂直于所述预瞄路径。
在本发明的一个实施例中,所述控制器702还配置为:
在所述行驶方向的垂直方向上设定转向中心;
基于所述转向中心拟合所述车辆从所述原始位置行驶至所述目标位置的转弯路径。
在本发明的一个实施例中,所述控制器702还配置为:
计算所述多个转弯路径的多个转弯半径;
采用所述多个转弯半径计算多个方向盘转角;
采用所述多个方向盘转角计算变化信息。
在本发明的一个实施例中,所述行驶状态还包括第一距离和第二距离,所述第一距离为所述车辆的左车轮距所述车道的左侧车道线的距离,所述第二距离为所述车辆的右车轮距所述车道的右侧车道线的距离;所述控制器702还配置为:
采用所述第一距离和所述第二距离之间计算所述车辆偏离所述目标路径的行驶偏差;
采用所述行驶方向、所述预瞄路径和所述行驶偏差计算所述目标位置偏离所述预瞄路径的预瞄偏差;
采用所述预瞄偏差计算所述原始位置与所述目标位置之间的目标距离;
采用所述目标距离计算所述转弯路径的转弯半径。
本发明实施例对车辆的运动状态进行预测,预瞄未来行驶的预瞄路径,并且根据预瞄路径进行偏离,拟合车辆从原始位置行驶至目标路径的转弯路径,以未来的预瞄路径作为目标调节当前方向盘转角,可以实现到提前调节的作用,使得车辆可以回归车道的目标路径,并且避免根据经验值进行调节,而基于预瞄路径偏离获得的转弯路径较大,减少转弯时的向心力,减少打滑的可能,在保持一定行驶速度的情况下,保证行车的稳定性,有效减缓出现超调、震荡的问题,提高驾驶员的舒适度。
对于装置、车辆的实施例而言,由于其与方法实施例基本相似,所以描 述的比较简单,相关之处参见方法实施例的部分说明即可。
本说明书中的各个实施例均采用递进的方式描述,每个实施例重点说明的都是与其他实施例的不同之处,各个实施例之间相同相似的部分互相参见即可。
本领域内的技术人员应明白,本发明实施例的实施例可提供为方法、装置、或计算机程序产品。因此,本发明实施例可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本发明实施例可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本发明实施例是参照根据本发明实施例的方法、终端设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理终端设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理终端设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理终端设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理终端设备上,使得在计算机或其他可编程终端设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程终端设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
例如,图8示出了可以实现根据本发明的车辆的行驶控制方法的计算机。该计算机可设置在车辆上,计算机作为车辆上的计算设备。该计算机传统上包括处理器810和以存储器820形式的计算机程序产品或者计算机可读介质。存储器820可以是诸如闪存、EEPROM(电可擦除可编程只读存储器)、EPROM、硬盘或者ROM之类的电子存储器。存储器820具有用于执行上述方法中的任何方法步骤的程序代码831的存储空间830。例如,用于程序代码的存储空间830可以包括分别用于实现上面的方法中的各种步骤的各个程序代码831。这些程序代码可以从一个或者多个计算机程序产品中读出或者写入到这一个或者多个计算机程序产品中。这些计算机程序产品包括诸如硬盘,紧致盘(CD)、存储卡或者软盘之类的程序代码载体。这样的计算机程序产品通常为如参考图9所述的便携式或者固定计算机可读介质。该计算机可读介质作为存储单元可以具有与图8的移动终端中的存储器820类似布置的存储段、存储空间等。程序代码可以例如以适当形式进行压缩。通常,计算机可读记录介质包括计算机可读代码831’,即可以由例如诸如810之类的处理器读取的代码,这些代码当由计算机运行时,导致该计算机执行上面所描述的方法中的各个步骤。
计算机可读介质包括用于以计算机可读的形式存储或者传送信息的任何机制。例如,计算机可读记录介质包括只读存储器、随机存储器、磁盘存储介质、闪速存储介质、电、光、声或者其他形式的传播信号(例如,载波、红外信号、数字信号等)等。
尽管已描述了本发明实施例的优选实施例,但本领域内的技术人员一旦得知了基本创造性概念,则可对这些实施例做出另外的变更和修改。所以,所附权利要求意欲解释为包括优选实施例以及落入本发明实施例范围的所有变更和修改。
最后,还需要说明的是,在本文中,诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来,而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得 包括一系列要素的过程、方法、物品或者终端设备不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者终端设备所固有的要素。在没有更多限制的情况下,由语句“包括一个......”限定的要素,并不排除在包括所述要素的过程、方法、物品或者终端设备中还存在另外的相同要素。
以上对本发明所提供的一种车辆的行驶控制方法、装置和车辆,进行了详细介绍,本文中应用了具体个例对本发明的原理及实施方式进行了阐述,以上实施例的说明只是用于帮助理解本发明的方法及其核心思想;同时,对于本领域的一般技术人员,依据本发明的思想,在具体实施方式及应用范围上均会有改变之处,综上所述,本说明书内容不应理解为对本发明的限制。

Claims (11)

  1. 一种车辆的行驶控制方法,其特征在于,包括:
    检测车辆的多个行驶状态,所述多个行驶状态包括多个行驶方向;
    分别对所述车辆从车道的原始位置沿所述多个行驶方向行驶进行预瞄,获得多个预瞄路径;
    根据所述多个预瞄路径拟合所述车辆从所述原始位置行驶至所述车道中目标路径的多个转弯路径;
    采用所述多个转弯路径计算方向盘转角的变化信息;
    按照所述方向盘转角的变化信息调整所述行驶方向,以控制所述车辆从所述原始位置沿所述转弯路径向所述目标路径行驶。
  2. 根据权利要求1所述的方法,其特征在于,所述行驶状态还包括行驶速度;
    所述分别对所述车辆从车道的原始位置沿所述多个行驶方向行驶进行预瞄,获得多个预瞄路径的步骤包括:
    预测所述车辆从车道的原始位置以所述行驶速度沿所述行驶方向行驶一段时间获得的路径,作为预瞄路径。
  3. 根据权利要求1所述的方法,其特征在于,所述根据所述多个预瞄路径拟合所述车辆从所述原始位置行驶至所述车道中目标路径的转弯路径的步骤包括:
    在所述车道的目标路径中选择偏离所述预瞄路径的目标位置;
    拟合所述车辆从所述原始位置行驶至所述目标位置的转弯路径。
  4. 根据权利要求3所述的方法,其特征在于,所述在所述车道的目标路径中选择偏离所述预瞄路径的目标位置的步骤包括:
    在所述预瞄路径中选择预瞄位置;
    在所述车道的目标路径中选择满足预设的偏离条件的位置,作为偏离所述预瞄路径的目标位置;
    其中,所述偏离条件为,与所述预瞄位置之间的路径组成预瞄偏差,所述预瞄偏差垂直于所述预瞄路径。
  5. 根据权利要求3所述的方法,其特征在于,所述拟合所述车辆从所 述原始位置行驶至所述目标位置的转弯路径的步骤包括:
    在所述行驶方向的垂直方向上设定转向中心;
    基于所述转向中心拟合所述车辆从所述原始位置行驶至所述目标位置的转弯路径。
  6. 根据权利要求1-5中任一项所述的方法,其特征在于,所述采用所述多个转弯路径计算方向盘转角的变化信息的步骤包括:
    计算所述多个转弯路径的多个转弯半径;
    采用所述多个转弯半径计算多个方向盘转角;
    采用所述多个方向盘转角计算变化信息。
  7. 根据权利要求6所述的方法,其特征在于,所述行驶状态还包括第一距离和第二距离,所述第一距离为所述车辆的左车轮距所述车道的左侧车道线的距离,所述第二距离为所述车辆的右车轮距所述车道的右侧车道线的距离;
    所述计算所述多个转弯路径的多个转弯半径的步骤包括:
    采用所述第一距离和所述第二距离之间计算所述车辆偏离所述目标路径的行驶偏差;
    采用所述行驶方向、所述预瞄路径和所述行驶偏差计算所述目标位置偏离所述预瞄路径的预瞄偏差;
    采用所述预瞄偏差计算所述原始位置与所述目标位置之间的目标距离;
    采用所述目标距离计算所述转弯路径的转弯半径。
  8. 一种车辆的行驶控制装置,其特征在于,包括:
    行驶状态检测模块,配置为检测车辆的多个行驶状态,所述多个行驶状态包括多个行驶方向;
    行驶预瞄模块,配置为分别对所述车辆从车道的原始位置沿所述行驶方向行驶进行预瞄,获得多个预瞄路径;
    转弯路径拟合模块,配置为根据所述多个预瞄路径拟合所述车辆从所述原始位置行驶至所述车道中目标路径的多个转弯路径;
    方向盘转角计算模块,配置为采用所述多个转弯路径计算方向盘转角的变化信息;
    行驶方向调整模块,配置为按照所述方向盘转角的变化信息调整所述行驶方向,以控制所述车辆从所述原始位置沿所述转弯路径向所述目标路径行驶。
  9. 根据权利要求8所述的装置,其特征在于,所述转弯路径拟合模块包括:
    目标位置选择模块,配置为在所述目标路径中选择偏离所述预瞄路径的目标位置;
    目标位置拟合模块,配置为拟合所述车辆从所述原始位置行驶至所述目标位置的转弯路径。
  10. 一种车辆,其特征在于,包括:
    传感器,配置为检测车辆的多个行驶状态,所述多个行驶状态包括多个行驶方向;
    控制器,配置为分别对所述车辆从车道的原始位置沿所述多个行驶方向行驶进行预瞄,获得多个预瞄路径;根据所述多个预瞄路径拟合所述车辆从车道的原始位置行驶至所述车道中目标路径的转弯路径;采用所述多个转弯路径计算方向盘转角的变化信息;
    电动转向系统,配置为按照所述方向盘转角的变化信息调整所述行驶方向,以控制所述车辆从所述原始位置沿所述转弯路径向所述目标位置行驶。
  11. 一种计算机可读介质,其中存储了用于执行权利要求1所述的车辆的行驶控制方法的计算机程序。
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