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Vehicle longitudinal control method, device and equipment and readable storage medium

A technology for longitudinal control and vehicles, applied in the fields of vehicle longitudinal control methods, equipment and readable storage media, and devices, capable of solving the problems of poor longitudinal control accuracy, inability to meet active deceleration control scenarios, and inability to cope with the speed control requirements or distance of intelligent driving vehicles Control requirements and other issues to achieve the effect of improving the longitudinal control accuracy

Pending Publication Date: 2022-07-29
DONGFENG COMML VEHICLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present application provides a vehicle longitudinal control method, device, equipment and readable storage medium to solve the problems in the related art that cannot cope with the full-speed speed control requirements or distance control requirements of intelligent driving vehicles, and cannot meet the target vehicle speed reduction. Problems with deceleration control scenarios and poor longitudinal control accuracy

Method used

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  • Vehicle longitudinal control method, device and equipment and readable storage medium
  • Vehicle longitudinal control method, device and equipment and readable storage medium
  • Vehicle longitudinal control method, device and equipment and readable storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] Embodiment 1: Take parking according to the target distance as an example.

[0080] The first step: analysis of position control requirements, receiving signals such as position control mode, position control enable, target distance and other signals of the bus. When performing micro-position control, the vehicle should meet the following operating conditions at the same time: the vehicle is successfully in gear, the vehicle battery / fuel quantity meets the operating conditions, the vehicle brake system is released, and the accelerator pedal is not depressed.

[0081] The second step: target speed analysis, plan an optimal speed curve according to the target distance and combined with the acceleration and deceleration characteristics of the vehicle, and carry out the speed planning of the starting, driving, coasting, and parking steps to realize the movement of the specified distance.

[0082] The third step: drive system control, convert the target vehicle speed signal ...

Embodiment 2

[0085] Example 2: Take parking according to target operating conditions as an example

[0086] Step 1: Analysis of automation operation requirements, receiving signals such as bus control mode, control enable, target operation condition, cycle number, time, mileage, etc. When performing automatic operation control, the vehicle should have the following operating conditions at the same time: Vehicle The gear is successfully engaged, the vehicle's battery / fuel volume meets the operating conditions, the vehicle's brake system is released, and the accelerator pedal is not depressed.

[0087] Step 2: target vehicle speed analysis, when the standard operating condition mode is triggered, the target vehicle speed associated with time or distance will be automatically output from the stored preset operating condition vehicle speed database; , time, mileage and other information are configured to stop output after a specified cycle period or stop output after a specified running time a...

Embodiment 3

[0090] Example 3: Take parking according to the target speed as an example

[0091] Step 1: Analysis of speed control requirements. If the target speed comes directly from the bus speed target request, that is, the speed control request is directly sent through the bus, the speed control mode, speed control enable, target speed and other signals of the bus are received; The target speed comes from the driver's human-computer interaction interface. The driver selects the target gear through the inching gear switch. When the inching mode is turned on, the vehicle can be controlled to run at the specified speed through the accelerator pedal. The target gear supports calibration configuration (see shown in Table 1).

[0092] Table 1 Mapping relationship between vehicle speed and gear

[0093]

[0094] It can be seen from Table 1 that in each micro-shift gear, the accelerator pedal opening is in one-to-one correspondence with the target vehicle speed, and the target rotational ...

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Abstract

The invention relates to a vehicle longitudinal control method, device and equipment and a readable storage medium, and relates to the technical field of vehicle longitudinal control, and the method comprises the steps that drive-by-wire request targets are obtained, and the drive-by-wire request targets comprise a vehicle speed request target and a distance request target; when it is detected that the drive-by-wire request target is a vehicle speed request target, the target vehicle speed corresponding to the vehicle speed request target is converted into a target rotating speed according to response characteristics of a motor, and a driving system and a braking system are controlled based on the target rotating speed; when it is detected that the drive-by-wire request target is a distance request target, a first vehicle speed is planned according to the vehicle dynamic characteristics and the target distance corresponding to the distance request target, the first vehicle speed is converted into a target rotating speed according to the response characteristics of a motor, and a driving system and a braking system are controlled based on the target rotating speed to achieve longitudinal control over the vehicle. According to the method, the full-speed-section speed control requirement, the distance control requirement and the active deceleration control scene when the target vehicle speed is reduced can be met, and the longitudinal control precision can be effectively improved.

Description

technical field [0001] The present application relates to the technical field of vehicle longitudinal control, and in particular, to a vehicle longitudinal control method, device, device, and readable storage medium. Background technique [0002] Control-by-wire technology belongs to the field of vehicle longitudinal control. The main application scenarios include the control of intelligent driving vehicles on the control-by-wire chassis, as well as low-speed moving of traditional vehicles, drum or road tests in operation and standardized conditions. Among them, the current control-by-wire technology mainly realizes the longitudinal movement of the vehicle by controlling the torque of the driving system, that is, according to the driving characteristics, the target driving force or driving power is used as the control target to perform the longitudinal control based on the accelerator, so as to realize the starting and acceleration of the vehicle. , climbing and normal drivi...

Claims

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Application Information

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IPC IPC(8): B60W30/18B60W40/105B60W40/00
CPCB60W30/18B60W40/105B60W40/00
Inventor 杨小波李学兵于涛毛天仪冯永杰李朝乐
Owner DONGFENG COMML VEHICLE CO LTD
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