EP3837147A1 - Fahrassistenzverfahren für ein fahrzeug, steuereinheit, fahrassistenzsystem und fahrzeug - Google Patents
Fahrassistenzverfahren für ein fahrzeug, steuereinheit, fahrassistenzsystem und fahrzeugInfo
- Publication number
- EP3837147A1 EP3837147A1 EP19755566.7A EP19755566A EP3837147A1 EP 3837147 A1 EP3837147 A1 EP 3837147A1 EP 19755566 A EP19755566 A EP 19755566A EP 3837147 A1 EP3837147 A1 EP 3837147A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vehicle
- driver assistance
- speed
- current
- wheel
- Prior art date
- 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.)
- Withdrawn
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT 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
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
- B60W40/10—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to vehicle motion
- B60W40/107—Longitudinal acceleration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT 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
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT 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
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
- B60W40/10—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to vehicle motion
- B60W40/105—Speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT 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
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
- B60W40/10—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to vehicle motion
- B60W40/109—Lateral acceleration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT 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
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
- B60W40/10—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to vehicle motion
- B60W40/114—Yaw movement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D15/00—Steering not otherwise provided for
- B62D15/02—Steering position indicators ; Steering position determination; Steering aids
- B62D15/027—Parking aids, e.g. instruction means
- B62D15/0285—Parking performed automatically
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/10—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration
- G01C21/12—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration executed aboard the object being navigated; Dead reckoning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C22/00—Measuring distance traversed on the ground by vehicles, persons, animals or other moving solid bodies, e.g. using odometers, using pedometers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT 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
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W2050/0001—Details of the control system
- B60W2050/0019—Control system elements or transfer functions
- B60W2050/0028—Mathematical models, e.g. for simulation
- B60W2050/0031—Mathematical model of the vehicle
- B60W2050/0033—Single-track, 2D vehicle model, i.e. two-wheel bicycle model
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT 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
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W2050/0001—Details of the control system
- B60W2050/0043—Signal treatments, identification of variables or parameters, parameter estimation or state estimation
- B60W2050/0052—Filtering, filters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT 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
- B60W2520/00—Input parameters relating to overall vehicle dynamics
- B60W2520/10—Longitudinal speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT 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
- B60W2520/00—Input parameters relating to overall vehicle dynamics
- B60W2520/10—Longitudinal speed
- B60W2520/105—Longitudinal acceleration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT 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
- B60W2520/00—Input parameters relating to overall vehicle dynamics
- B60W2520/12—Lateral speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT 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
- B60W2520/00—Input parameters relating to overall vehicle dynamics
- B60W2520/12—Lateral speed
- B60W2520/125—Lateral acceleration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT 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
- B60W2520/00—Input parameters relating to overall vehicle dynamics
- B60W2520/14—Yaw
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT 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
- B60W2520/00—Input parameters relating to overall vehicle dynamics
- B60W2520/28—Wheel speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT 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
- B60W2720/00—Output or target parameters relating to overall vehicle dynamics
- B60W2720/10—Longitudinal speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT 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
- B60W2720/00—Output or target parameters relating to overall vehicle dynamics
- B60W2720/14—Yaw
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/396—Determining accuracy or reliability of position or pseudorange measurements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/40—Correcting position, velocity or attitude
- G01S19/41—Differential correction, e.g. DGPS [differential GPS]
Definitions
- the present invention relates to a driver assistance method for a vehicle, a control unit for a driver assistance system of a vehicle and a driver assistance system and a vehicle as such.
- An essential aspect of such methods and systems is the ability of the vehicle to self-locate, for example with regard to a positioning and orientation of the vehicle in relation to a roadway, surrounding objects, the surrounding traffic and in particular in relation to a parking space or the like.
- Low speed range for example when parking at less than 5 km / h, values with often insufficient measuring accuracy.
- claim 1 has the advantage that also in
- the circumferential wheel speed of one or more wheels of the vehicle is recorded directly, evaluated and used to determine the current speed and the current yaw rate of the vehicle.
- the measurement of the wheel circumference speed of one or more wheels can be carried out with a higher measuring accuracy than the commonly used measurement values of wheel pulse counters. According to the invention, this also results in a higher overall accuracy in the self-localization of the underlying vehicle.
- Driver assistance procedure becomes a respective current one
- Wheel circumferential speed detected and provided by a wheel circumferential speed sensor detected and provided by a wheel circumferential speed sensor.
- a time delay of a detected instantaneous wheel circumferential speed is compensated for by temporal extrapolation of measured values at an earlier measurement time to a current evaluation time.
- a particularly simple configuration of the compensation can be achieved if it (i) by time integration from the earlier measurement time to the current evaluation time, (ii) on the basis of one or more measurement values for an instantaneous acceleration of the vehicle and / or on the basis of a single-track model of the Vehicle.
- Another advantageous exemplary embodiment of the driver assistance method according to the invention results in a particularly advantageous and rapid feasibility of the individual with regard to an implementation
- Exploited vehicle namely the relationship between the current speed and the current yaw rate of the vehicle on the one hand, which are to be determined, and the measurable values of the
- Wheel circumferential speeds formed vector is applied.
- the state of the vehicle describes in particular the current one
- the distance traveled by a wheel contact point which can also be referred to as the current distance traveled by a wheel contact point, to one or more wheels of the vehicle can be taken into account.
- a particularly high degree of accuracy in self-localization can be achieved if, in accordance with another advantageous development of the driver assistance method according to the invention, in addition to
- Wheel circumferential speed a currently covered distance of the Contact point of one or more wheels of the vehicle is detected, evaluated and used to determine the current speed, the current yaw rate, a current position and / or a current orientation of the vehicle.
- a respective currently covered distance of a respective contact point of a wheel of the vehicle can advantageously be recorded and made available via a respective wheel pulse counter, taking into account a value provided for the circumference of the wheel.
- This measure can therefore be provided in an ESP system anyway
- Wheel circumference speed of one or more wheels of the vehicle and a respective currently covered distance of the contact point of one or more wheels of the vehicle a Bayesian filter and in particular an extended Kalman filter for evaluating, for plausibility checking and / or for determining a current position and / or current orientation of the vehicle be fed.
- Control unit for a driver assistance system of a vehicle is proposed, the control unit being set up, an inventive one
- the present invention furthermore also relates to a driver assistance system for a vehicle as such, the driver assistance system being set up to initiate, execute, control and / or regulate a driver assistance method according to the invention, and / or the driver assistance system being a control unit designed according to the invention or an active connection to such a control unit designed according to the invention.
- driver assistance method according to the invention and the driver assistance system according to the invention can be understood and implemented purely in terms of hardware, for example also as a device for controlling the operation of a vehicle.
- implementation as an ASIC is conceivable.
- a purely procedural implementation for example in connection with a computer implementation of the driver assistance method and driver assistance system according to the invention, is conceivable, preferably in connection with or as a method for controlling the operation of a vehicle.
- Combined or mixed systems are also conceivable, in which partial aspects of the invention are hardware and / or software or
- the present invention also provides a vehicle as such.
- the vehicle according to the invention is set up to be used with a driving assistance method designed according to the invention.
- the proposed vehicle is designed with a driver assistance system according to the invention.
- Figure 1 shows a kind of a schematic block diagram
- FIG. 2 shows a flow diagram of an embodiment of a
- Driver assistance system in the manner of a driver assistance method.
- FIG. 3 explains schematically various at a
- Embodiment of the driver assistance system or driver assistance method according to the invention used parameters in relation to the state of an underlying vehicle.
- FIGS. 4 to 7 show graphs to explain the mode of operation of
- Figure 1 shows a kind of a schematic block diagram
- Vehicle 1 designed according to the invention, which uses an embodiment of the driver assistance system 100 according to the invention and / or an embodiment of the driver assistance method T according to the invention.
- the vehicle 1 according to the invention is shown schematically with a
- Body 2 wheels 4, a drive 30 with drive train 31 and a system 40 for steering and braking with a steering and / or brake train 41.
- a control unit designed according to the invention is also provided.
- driver assistance system 100 for the underlying driver assistance system 100 according to the invention, which can also be designed, for example, as part of a vehicle or engine control and which via a control and / or detection line
- control unit 50 is also connected to sensors 10 via the control and / or detection line 51, namely a first sensor 10-1 in the form of a sensor for the circumferential wheel speed and a second sensor 10-2 in the form of a wheel pulse counter.
- corresponding measurement signals with respect to the sensors 10, 10-1, 10-2 of the control unit 50 are Wheel circumferential speed or with respect to the wheel speed or in terms of the wheel rotation angle supplied and using a
- Bayesian filter and in particular a Kalman filter 20 one
- Vehicle speed v and for the yaw rate w and on the other hand to generate values for the distance S covered by the respective contact point of a wheel 4, and to provide a position and / or orientation of the vehicle 1 in the environment with a high degree of reliability even at low speeds of the Provide vehicle 1.
- FIG. 2 shows a flow diagram of an embodiment of an as
- the core of the embodiment of the driver assistance method T according to FIG. 2 (i) is subdivided into a step T1 for determining the speed v and yaw rate w of a vehicle 1, (ii) a step T2 of the self-localization of the vehicle 1 on the basis of the provided
- Detecting and evaluating the vehicle environment and (iv) a step T4 of controlling a vehicle assembly based on the self-localization and the evaluation of the vehicle environment.
- Vehicle 1 is divided into a number of sub-steps T1-1 to T1-3.
- the wheel circumferential speed V is detected in relation to one or more wheels 4, in particular by direct measurement with a corresponding sensor 10-1 for the wheel circumferential speed V of an assigned wheel 4.
- any time delay that occurs when the wheel circumferential speed V is detected is compensated for, for example by temporal extrapolation into the future by means of time integration, as explained in detail below in connection with a preferred embodiment of the present invention.
- speed v and yaw rate w of the underlying vehicle 1 are generated and made available.
- the step T2 of the self-localization of the vehicle 1 can also be subdivided into a series of sub-steps T2-1 to T2-3 in one embodiment of the present invention.
- a first sub-step T2-1 the currently traveled path S of a wheel contact point to one or more wheels 4 is recorded, in particular by direct measurement and / or in connection with measurement data read out from a WIC sensor 10-2 on the basis of a wheel radius,
- a Bayesian filter and in particular a Kalman filter 20 are applied to the acquired data, namely to the
- the data relating to the position and / or orientation of the vehicle 1 in its surroundings, which are generated with high reliability, are then used as a basis for evaluating the vehicle environment in step T3 and as a result of the control of at least one vehicle unit in step T4, for example in connection with the control a system 40 of steering and brake and / or a drive 30 of the vehicle 1.
- Two critical and measurable aspects in the context of automated parking are (i) the presence or absence of curbs and (ii) the minimum required parking space for a given vehicle.
- the impact of these aspects can be reduced to improve the customer experience.
- a more precise localization of the vehicle while parking is an essential requirement.
- the present invention proposes a new method of using information that can be derived from ordinary ESP systems.
- Wheel pulse counters (English: Wheel Impulse Counter or WIC) can be read out. Although the corresponding measured values are available with a known, fixed time delay, they are subjected to a comparatively high error for the evaluation of the vehicle speed and the yaw rate by quantization and are therefore inaccurate and therefore do not allow precise self-localization in a vehicle application, for example in automated driving or parking.
- Both are based on related signal preprocessing and corresponding timeout conditions.
- V (v FrL V FrR V RrL V RrR ) T GR 4 . _. , , , ... ..
- V J or wheel speeds are generated.
- vehicle 1 can generally have four-wheel steering. This means that, according to the invention, all four wheels 4 of vehicle 1 can be steerable.
- the dimension of the matrix to be inverted can be, for example, by
- delay compensation can be introduced in other embodiments of the method according to the invention, so that In particular, measured values from sensors for wheel circumference speed or wheel rotation speed can be used.
- Vehicle 1 - and the speed v of the vehicle 1 are given and as
- Wheel speeds V also called wheel speeds or
- Wheel circumferential speeds are designated (all terms are used synonymously) using a suitable transformation matrix
- V H (u) z: (1.1.1)
- the time derivative c to state c can be derived from
- measured values for acceleration A and the center of rotation or center of rotation or the corresponding distance R of the center of rotation with respect to the single-track model must be available and known without significant delay.
- an offset estimate must be implemented.
- graphs 140, 150 show tracks 143-1 to 153-3 for various signals for yaw rate and speed as a function of time t, as part of a parallel parking scenario.
- the solid tracks 143-1, 153-1 refer to
- Reference systems were recorded with an inertial measurement unit coupled to the DGPS system to compensate for sensor errors, such as offset, drift and gain.
- the values calculated from the wheel circumferential speeds or wheel speeds are shown in dashed lines as derived values or estimated values in tracks 143-2, 153-2. They have a time delay and are determined according to expression (1.1.7).
- the measurements compensated by acceleration measurements with a time delay are shown in dotted lines in tracks 143-3, 153-3, the corresponding values are generated according to the expression (1.1.10).
- the time is plotted on the abscissa 141 and 151 in the graphs 140 and 150 of FIGS. 4 and 5.
- the yaw rate and the vehicle speed are plotted on the ordinates 142 and 152.
- Measurements of values of the wheel circumferential speed V and values of a distance traveled from wheel contact points or wheel contact points S are fused or connected to one another.
- the system function describes how the vehicle speed ve M, the vehicle yaw rate we R and the distances traveled R 4 of the wheel contact points develop over time.
- T s is the sampling time.
- P denote the contact point vectors.
- d denotes the vector of the individual wheel rotation angles.
- the measurement function h describes how the values of the measurements z can be determined as a function of the system states x and input values or input values u.
- Vk and W k denote the values or estimates of values of the speed or the yaw rate using the above-mentioned approach.
- Y is an auxiliary variable.
- the matrices F and H are defined in connection with the expressions (1.2.6) and (1.2.7).
- a Bayesian filter and in particular an extended Kalman filter according to the above scheme (1.2.5) is used to determine or estimate the values of v and w.
- the complete state that contains S is determined.
- s is corrected indirectly via the states or values of v and w.
- the position of the vehicle 1 can be determined or estimated from the states or values of v and w and over the distance traveled, according to and in accordance with the path of the contact points.
- the time is plotted on the abscissa 161 and 171 in graphs 160 and 170 of FIGS. 6 and 7.
- the yaw rate and the vehicle speed are plotted on the ordinates 162 and 172.
- the solid tracks 163-1 and 173-1 again refer to reference measurements, the dashed tracks 163-2 and 173-2 relate to values which were generated using a Bayesian filter and in particular an extended Kalman filter 20 (EKF).
- EKF extended Kalman filter
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Remote Sensing (AREA)
- Radar, Positioning & Navigation (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
- Steering Control In Accordance With Driving Conditions (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018213931.8A DE102018213931A1 (de) | 2018-08-17 | 2018-08-17 | Fahrassistenzverfahren für ein Fahrzeug, Steuereinheit, Fahrassistenzsystem und Fahrzeug |
| PCT/EP2019/071414 WO2020035408A1 (de) | 2018-08-17 | 2019-08-09 | Fahrassistenzverfahren für ein fahrzeug, steuereinheit, fahrassistenzsystem und fahrzeug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3837147A1 true EP3837147A1 (de) | 2021-06-23 |
Family
ID=67660528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19755566.7A Withdrawn EP3837147A1 (de) | 2018-08-17 | 2019-08-09 | Fahrassistenzverfahren für ein fahrzeug, steuereinheit, fahrassistenzsystem und fahrzeug |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11993272B2 (de) |
| EP (1) | EP3837147A1 (de) |
| CN (1) | CN112566828B (de) |
| DE (1) | DE102018213931A1 (de) |
| WO (1) | WO2020035408A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114475581B (zh) * | 2022-02-25 | 2022-09-16 | 北京流马锐驰科技有限公司 | 基于轮速脉冲和imu卡尔曼滤波融合的自动泊车定位方法 |
Family Cites Families (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE523023C2 (sv) * | 2000-04-12 | 2004-03-23 | Nira Dynamics Ab | Metod och anordning för att med rekursiv filtrering bestämma en fysikalisk parameter hos ett hjulfordon |
| DE10323915A1 (de) * | 2003-05-23 | 2005-02-03 | Daimlerchrysler Ag | Kamerabasierte Positionserkennung für ein Straßenfahrzeug |
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-
2018
- 2018-08-17 DE DE102018213931.8A patent/DE102018213931A1/de active Pending
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2019
- 2019-08-09 EP EP19755566.7A patent/EP3837147A1/de not_active Withdrawn
- 2019-08-09 WO PCT/EP2019/071414 patent/WO2020035408A1/de not_active Ceased
- 2019-08-09 US US17/055,409 patent/US11993272B2/en active Active
- 2019-08-09 CN CN201980054475.XA patent/CN112566828B/zh active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE102018213931A1 (de) | 2020-02-20 |
| CN112566828B (zh) | 2024-10-01 |
| CN112566828A (zh) | 2021-03-26 |
| WO2020035408A1 (de) | 2020-02-20 |
| US11993272B2 (en) | 2024-05-28 |
| US20210114602A1 (en) | 2021-04-22 |
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