422 results about "Vehicle acceleration" patented technology

The invention discloses an automobile driving state blind area monitoring method and a rearview mirror, and relates to the technical field of blind area monitoring. Comprising the following steps of information collection, specifically, sensors and cameras are installed on wheels of an automobile, a steering wheel steering column, an automobile chassis and a steering system respectively, driving state data of the automobile speed, the steering wheel angle, the automobile acceleration and the steering angle and image data around the automobile are collected in real time, and real-time automobile information data are obtained; according to the system, driving state data such as the vehicle speed, the steering wheel angle, the vehicle acceleration and the steering angle are combined, the blind area around the vehicle is monitored in real time through the sensor and the camera, and when the vehicle steers, the blind area monitoring range is adjusted in real time to adapt to the driving direction change; the rearview mirror can display blind area images in real time, the blind area alertness of a driver can be greatly improved, and the traffic accident risk caused by the blind area is effectively reduced.

The invention relates to the technical field of AMT gearbox control, in particular to an AMT gearbox control method, system and equipment in a braking state and a medium, and the method comprises the steps that when a vehicle is in a braking deceleration state, the stepping duration of a brake pedal, the actual vehicle speed, the actual acceleration of the vehicle and the rotating speed of an engine are obtained; whether the braking intention of the driver is emergency braking or stable braking is judged based on the stepping duration of the brake pedal and the actual acceleration of the vehicle; and based on the braking intention, the gear of the AMT gearbox and the separation state of a clutch are controlled till braking is finished. Wherein the current gear is maintained during emergency braking, and a clutch is controlled to be separated according to an engine rotating speed threshold value; during stable braking, after the rotating speed of the engine meets the condition, whether downshift is conducted or not is judged according to the actual vehicle speed, and a clutch is controlled to be separated. The brake intention of a driver can be accurately recognized, differential control is executed, and therefore the brake efficiency is effectively improved, engine flameout is prevented, and the driving smoothness is improved.

A multi-vehicle control system (MVCS) for control of a multi-vehicle system having independently powered and steered lead and trailer vehicles connected by a slidable length sensing tow bar system. The MVCS includes a controller configured to receive throttle, brake, and steering signals from the lead vehicle, receive signals from the tow bar system indicating an extension length of the tow bar system, a front angle deviation of the lead vehicle, and a rear angle deviation of the trailer vehicle. The controller is further configured to determine, based on the received signals, a trailer vehicle acceleration / deceleration output and a trailer vehicle steering output, determine a driving scenario of the multi-vehicle system, and operate the multi-vehicle system based on the determined driving scenario and the determined trailer vehicle acceleration / deceleration output and trailer vehicle steering output.

To provide a support apparatus, a support method, and a program capable of securing prompt response to an accident.SOLUTION: A support apparatus is configured to: acquire acceleration data indicating acceleration of a vehicle and contract data corresponding to the vehicle; determine whether an impact corresponds to a serious accident in a plurality of accident types, based on the acceleration data and the contract data; transmits, when the impact is determined to be an impact corresponding to a serious accident, an instant payment notification which is a notification about insurance payout in a shorter period than the case where the impact is not a serious accident. Accordingly, a quick response to an accident can be secured.SELECTED DRAWING: Figure 10

A vehicle includes a suspension system having a damping system that includes a plurality of dampers and a plurality of damper valves. The vehicle further includes one or more processors configured to determine energy content of an acceleration signal indicative of acceleration of the vehicle. The one or more processors are further configured to dynamically tune a cutoff frequency of a high-pass filter based on the energy content of the acceleration signal. The one or more processors are configured to filter, via the high-pass filter, a velocity signal derived from the acceleration signal to output a filtered velocity signal. The one or more processors are configured to control operation of the damping system based on the filtered velocity signal.

The invention discloses a vehicle turning control method and device and a distributed driving vehicle, and relates to the technical field of vehicles. The method comprises the steps that under the condition that the current working condition of a vehicle is a curve acceleration working condition, the total yawing moment is determined based on target driving force corresponding to all wheels in the vehicle; on the basis of the total yaw moment and an aggressive degree coefficient corresponding to the current driving mode, compensation yaw moment is determined; the aggressive degree coefficient is related to the average transverse acceleration of the vehicle within the preset duration closest to the current moment; determining a target rear wheel steering angle corresponding to the compensated yaw moment; an angle of a rear wheel in the vehicle is adjusted based on the target rear wheel steering angle to accelerate the vehicle through the curve. By adopting the method, the efficiency of the vehicle passing through the curve and the driving safety can be improved under the condition that the vehicle runs on the curve.

The invention relates to the technical field of data control, and particularly discloses a multi-motor coordination control method and system based on dynamic load compensation, and the method comprises the steps: obtaining the posture data and driving state data of a whole vehicle; estimating a current road slope angle; calculating actual vertical loads of front and rear wheels; a variable weight harmonic decomposition mechanism is adopted to execute an anti-interference and torque proportion cooperative decomposition task; and executing a multi-motor coordination control task by adopting a model prediction control algorithm. In the prior art, motor torque distribution is carried out only based on static vehicle parameters or whole vehicle homogeneous hypothesis, and especially under dynamic working conditions such as vehicle acceleration climbing, low-speed heavy load or dramatic change of load migration, accurate torque coordination and load sensing control optimization between motors cannot be realized. Due to the fact that the dynamic load compensation mechanism is constructed and coordinated control of the model predictive control algorithm is combined, the response performance and coordinated control precision of the vehicle power system are remarkably improved.

The application relates to a layered decoupling unmanned personification trajectory planning method, which comprises the following steps: S1, upper path planning: for different road scenes, a sampled-based path planning method, a search-based path planning method and an optimization-based path planning method are combined to plan an optimal path; S2, lower speed planning: a search method based on an ST obstacle space-time collision prediction graph and vehicle acceleration constraint is adopted to obtain a speed curve of a vehicle along the optimal path, and finally an optimal trajectory is obtained. Compared with the prior art, the application provides a safer, more reliable, stable and smoother personification driving trajectory for an unmanned vehicle.

The application provides a torque compensation method and system in motor jitter, and the method comprises the following steps: acquiring a current rotating speed of the motor; when the rotating speed of the motor is less than a first predetermined value, calculating a rotating speed acceleration according to a motor rotating speed signal, and performing rotating speed compensation on the motor under different rotating speed accelerations based on a calibration value corresponding to the rotating speed acceleration; when the rotating speed of the motor is greater than the first predetermined value, calculating a vehicle acceleration according to an IPB system signal, and performing rotating speed compensation on the motor under different vehicle accelerations based on a calibration value corresponding to the vehicle acceleration. Through the scheme, the rotating speed delay generated by the low-pass filter can be reduced, the torque compensation error can be reduced, and the accuracy of torque compensation can be improved.

This invention discloses a method and apparatus for calculating vehicle acceleration. The method establishes gravitational acceleration component equations based on a first set of acceleration models and a second set of acceleration models. It determines the total acceleration vector of a second sensor based on the vector coordinates of the second coordinate system relative to the first coordinate system. Based on the vector coordinates of the second coordinate system relative to the first coordinate system, it calculates the total rotational angular velocity vector and the total rotational angular acceleration vector of the second sensor in the first coordinate system. Based on the total acceleration vector, the total rotational angular velocity vector, and the total rotational angular acceleration vector, it calculates the summed acceleration vector of the second sensor at the origin of the first coordinate system. Based on the resultant acceleration vector and the summed acceleration vector in the first coordinate system, it establishes acceleration equations. Finally, it establishes and solves a joint system of equations based on the gravitational acceleration component equations and the acceleration equations to obtain the motion acceleration of each axis in the first coordinate system. This method improves the accuracy of vehicle acceleration calculation.

The application relates to the technical field of vehicle control, and particularly provides a vehicle lateral control compensation method and device for a slope road surface, a computing device and a vehicle. First, road surface state data and vehicle motion data are synchronously collected to provide input for eliminating measurement interference of vehicle acceleration and deceleration in multi-source data fusion. Then, a longitudinal slope parameter and / or a lateral superhigh parameter are accurately calculated based on the fused data, a steering compensation amount of an adaptive angle control interface is directly generated on the basis, a physical quantity dimension is matched with an angle control demand of a domain controller, the compensation amount is finally embedded into a lateral control instruction generation logic, a requested steering angle conforming to actual steering demand of the vehicle is directly output, a torque-angle mapping deviation is eliminated from an instruction generation source, and steering jitter and steady-state trajectory deviation caused by repeated correction of the controller are avoided.

A control device (100) and a method (200, 220) for controlling a vehicle (1) are provided. The vehicle comprises an energy storage device (3), an electric motor (2) and at least one service brake (10) configured to brake a vehicle wheel (7, 8). The method (200, 220) comprises the step of applying a braking force by activating the service brake (10) if it is predicted that the energy storage device (3) will not have sufficient capacity for a required regenerative braking power during an upcoming braking event. The service brake (10) is activated while the electric motor (2) applies a propulsion force or in a plurality of consecutive braking phases (20) in which the propulsion force of the electric motor (2) is temporarily interrupted, the braking phases (20) being separated by vehicle 10 acceleration phases (22) during which a propulsion force is applied by the electric motor (2).

This invention discloses a method and system for handling gearbox impact vibration problems during vehicle acceleration and deceleration. The method includes the following steps: conducting whole-vehicle testing to obtain vibration parameter information, state parameter information, and a whole-vehicle NVH score when gearbox impact vibration occurs; obtaining evaluation parameters based on the vibration parameter information; establishing the relationship between the evaluation parameters and the whole-vehicle NVH score; establishing the relationship between the evaluation parameters and the state parameters based on the state parameter information; and optimizing the vehicle design to adjust the state parameters based on the relationship between the evaluation parameters and the whole-vehicle NVH score, as well as the relationship between the evaluation parameters and the state parameters, thereby achieving the required whole-vehicle NVH score. This method enables objective and efficient gearbox impact assessment, analysis, and verification, guides further optimization of gear impact, reduces the number of NVH tests, and shortens the development cycle.

The application discloses a new energy commercial vehicle adaptive torque distribution output method and system, and belongs to the field of new energy vehicles. The method comprises the following steps: acquiring vehicle acceleration and vehicle speed data; based on the vehicle acceleration and vehicle speed data, vehicle weight is calculated by using an extended Kalman filtering algorithm and a least square method to obtain a vehicle weight estimation value; based on the vehicle weight estimation value, a target torque value is obtained by table lookup of a preset vehicle weight-torque mapping table, and the target torque value is sent to a motor control unit; the motor control unit controls the power output of the vehicle according to the received torque value; a vehicle reference vehicle weight inputted from outside is acquired; and based on the vehicle reference vehicle weight, the vehicle weight calculation process is adaptively corrected. The application realizes adaptive torque distribution output suitable for different load conditions.

A driving assistance apparatus according to the present disclosure includes: a vehicle acceleration detection unit configured to detect vehicle acceleration including lateral acceleration and longitudinal acceleration of a vehicle; a calculation unit configured to calculate for each wheel a friction circle, and a lateral force generated at each wheel and a longitudinal force generated at each wheel on the basis of a result of detection by the vehicle acceleration detection unit; and a display unit configured to display an image based on the friction circle, and a magnitude and / or a direction of a resultant force of the lateral force and the longitudinal force generated at each wheel based on a result of calculation by the calculation unit.

One aspect of the invention relates to a method for operating a vehicle device (3) with an acceleration system (4), the actuation of which can effect the acceleration of a vehicle (1), wherein the acceleration system (4) has an actuating element (6) for manual actuation by a vehicle user and an actuator (7) for acting on the actuating element (6), wherein the method comprises the following steps: a) providing at least one environmental information about the environment (11) of a vehicle (1) to an evaluation unit (8); b) providing at least one piece of information about a state of the acceleration system (4) of the vehicle (1) to the evaluation unit (8); c) assessing a current and / or future expected driving state of the vehicle (1) depending on the information about the state of the acceleration system (4) of the vehicle (1) and the environmental information with the evaluation unit (8);d) depending on the result of the assessment, generating a control signal with the evaluation unit (8) to control the actuator (7) of the acceleration system (4); e) situation-dependent action of the actuator (7) on the basis of the control signal on the actuating element (6), so that the haptically perceptible auxiliary information is generated by the associated movement of the actuating element (6).

This application provides a control method, device, and vehicle. The method includes: acquiring vehicle driving parameter information, including motor speed and vehicle acceleration; determining, based on the driving parameter information, that the road surface where the vehicle is located is a separated road surface; and sending first instruction information to a first controller, the first instruction information being used to instruct the first controller to control the differential lock to lock, the first controller being located within the vehicle. Based on the above method, it is possible to efficiently identify that the vehicle is on a separated road surface and promptly control the differential lock to lock, thereby improving the vehicle's passability and driving stability under complex road conditions.

This application discloses a vehicle acceleration determination method, apparatus, electronic device, and storage medium. The method includes: acquiring an initial acceleration from a vehicle accelerometer; determining the zero-bias error parameter of the vehicle accelerometer; and updating the initial acceleration using the zero-bias error parameter of the vehicle accelerometer when it is determined that the vehicle is currently in a non-moving state. This application achieves adaptive adjustment of the zero-bias error parameter of the vehicle accelerometer, while eliminating high-frequency noise errors and improving data accuracy. This application can be used in autonomous vehicles.

To provide a setup in which an accelerometer is permanently installed on a running railway vehicle and establish an environment in which data from the accelerometer can be used to ascertain vehicle behavior, a railway vehicle system according to the present invention incorporates an accelerometer into an equipment device box that is installed on a railway vehicle, and the accelerometer measures the acceleration in the directions of an x axis that is parallel to the advancement direction of the railway vehicle and at least one of a y axis that is parallel to a floor surface of the railway vehicle and perpendicular to the advancement direction of the railway vehicle and a z axis that is perpendicular to the floor surface of the railway vehicle.

The application is suitable for the technical field of vehicle acceleration control, and provides a commercial vehicle acceleration closed-loop control method considering load and running resistance, which comprises the following steps: step 1, driving system dynamics modeling; step 2, driving process dynamic response transfer function modeling; step 3, acceleration dynamic response control parameter determination; and step 4, acceleration adaptive closed-loop control. The method derives the dynamic response transfer function of the driving process by constructing the driving system dynamics model; after the key parameters most sensitive to the acceleration dynamic response are determined through analysis, the method of combining feedforward control and closed-loop feedback adaptive control is adopted to realize the closed-loop adaptive control of the acceleration dynamic response. When the vehicle mass and the running resistance change, the method can effectively guarantee the consistency of the acceleration dynamic response, and further improve the driving quality.

A device positionable in a passenger compartment of a vehicle can include a processor, an accelerometer, and a wireless transmitter. The processor can receive, while in a hibernation mode, an interrupt signal from the accelerometer based on the accelerometer detecting an acceleration of the vehicle that exceeds a predefined acceleration threshold. In response to receiving the interrupt signal from the accelerometer, the processor can switch from the hibernation mode to a sleep mode. While in the sleep mode, the processor can detect a trip start event based on one or more accelerometer values from the accelerometer. In response to detecting the trip start event, the processor can then switch from the sleep mode to an active mode. While in the active mode, the processor can receive additional accelerometer values from the accelerometer and store them for subsequent transmission to a remote server system using the wireless transmitter.

This application provides a method and apparatus for estimating reference vehicle speed under slope braking conditions. The method includes: acquiring the actual wheel speed of the target vehicle and the acceleration detection value from the vehicle acceleration sensor; determining the wheel adhesion state of the target vehicle based on the actual wheel speed; determining the estimated wheel speed of the target vehicle based on the wheel adhesion state; estimating the initial value of the reference vehicle speed based on the estimated wheel speed and the wheel adhesion state; calculating the estimation error based on the initial value of the reference vehicle speed; and calculating the current vehicle body acceleration of the target vehicle based on the estimation error and the acceleration detection value. Therefore, this method and apparatus can estimate the reference vehicle speed under slope conditions, has good applicability, and a small estimation error.

The present application belongs to the technical field of longitudinal vehicle speed estimation, and relates to a vehicle longitudinal vehicle speed estimation method, system, device and medium, comprising: judging vehicle acceleration and deceleration state; calculating tire adhesion rate based on wheel longitudinal force and vertical force; obtaining corrected four-wheel wheel speed representing longitudinal vehicle speed at vehicle mass center according to obtained actual wheel speed and wheel rotation angle; correcting wheel speed credibility according to wheel acceleration boundary value and wheel slip rate; dynamically adjusting measurement error covariance matrix of Kalman filter based on corrected wheel speed credibility, and dynamically adjusting system error covariance matrix according to the measurement error covariance matrix; and obtaining longitudinal vehicle speed estimation value through Kalman filter equation. The present application corrects wheel speed credibility through tire adhesion rate and vehicle acceleration and deceleration state, and adjusts Kalman filter covariance matrix using wheel speed credibility, thereby solving the problems of low accuracy of existing longitudinal vehicle speed estimation and incapability of being used in different working conditions.

This invention discloses a method and system for optimizing vehicle trajectories at intersections based on offline reinforcement learning. The specific steps are as follows: A communication scenario between traffic lights and connected vehicles at an intersection is established under an intelligent connected vehicle environment. A communication distance threshold between vehicles and traffic lights is set within the scenario. When a vehicle enters the control area of ​​the traffic light, both parties can exchange information. The operating trajectories of connected vehicles and signal phase timing data at the signalized intersection are collected. The vehicle's driving process at the intersection is abstracted as a Markov decision process. Vehicle travel time, vehicle energy consumption, and collision time are used as parameters of the Markov decision reward function. A suitable dataset is constructed. The vehicle agent is trained offline using reinforcement learning to obtain a suitable intersection traffic strategy. This invention can be applied to vehicle control at intersections, controlling vehicle acceleration to enable vehicles to travel along the optimal trajectory, thereby achieving energy saving, emission reduction, and improved safety performance.

The application discloses a method for determining the low-temperature discharge capacity of a new energy vehicle, comprising the following steps: step 1, vehicle invasion process: allowing the vehicle to sufficiently reduce the temperature at a set temperature; step 2, cold start process: starting the vehicle; step 3, discharge process: recording parameter information while performing vehicle acceleration operation; and step 4, obtaining the low-temperature discharge capacity result of the new energy vehicle. The application can reliably determine the low-temperature discharge capacity of the new energy vehicle, improves the reliability of the vehicle in cold regions, is convenient for vehicle enterprises to verify the related performance of the vehicle, and can edit more accurate vehicle use instructions.

The invention discloses a control method, device and equipment for preventing misoperation of a vehicle accelerator pedal and a storage medium, and the method comprises the steps that accelerator pedal operation data, driver physiological data and current environment data are collected, and environment weight parameters are determined according to the current environment data; on the basis of the accelerator pedal operation data, the driver physiological data and the current environment data, the abnormity confidence coefficient is determined through a preset multi-mode abnormity detection model; and determining a current risk level according to the abnormal confidence coefficient, the collision time parameter and the environment weight parameter, and triggering a corresponding control strategy according to the current risk level. The abnormal confidence coefficient is determined through the preset multi-mode abnormal detection model based on the accelerator pedal operation data, the driver physiological data and the current environment data, and the corresponding control strategy is triggered according to the current risk level, so that the accuracy of accelerator pedal misoperation identification and the precision of the control strategy are improved, and the user experience is improved. Therefore, the driving experience and the driving safety are improved.

The invention relates to the technical field of vehicles, in particular to an EMB target braking force calculation method, device and system and a medium. The method comprises the steps that the mass of a whole vehicle is estimated based on the output torque of an engine / motor, the transmission ratio of a transmission, the transmission ratio of a main speed reducer, the effective radius of a tire and the current acceleration of the vehicle; the required total braking force is determined according to the treading depth of the driver and the mass of the whole vehicle; estimating the current gradient based on the gravitational acceleration, the acceleration obtained by the acceleration sensor and the acceleration obtained by differential of the vehicle speed, and correcting the total braking force according to the current gradient to obtain the corrected total braking force; the braking force distributed to the front axle and the rear axle is determined according to the longitudinal acceleration and the corrected total braking force, and when the vehicle is in the steering state, the braking force distribution proportion of the wheels on the two sides is adjusted according to the actual lateral acceleration and the target lateral acceleration so as to determine the EMB target braking force of each wheel; the reliability and adaptability of the braking system can be improved.

A system and method for avoiding unintended acceleration is provided and includes a first integrated circuit-based electronic controller configured to receive acceleration and brake requests and provide a control output via a datalink dedicated to controlling a prime mover system of the vehicle, a three-axis accelerometer configured to provide acceleration outputs indicative of acceleration of the accelerometer relative to three dimensions, and a second integrated circuit-based electronic controller operative independently of the first integrated circuit-based controller configured to receive the acceleration and braking requests, receive the acceleration outputs of the three-axis accelerometer, and operatively coupled with the datalink. The second integrated circuit-based electronic controller is configured to determine an unintended acceleration event in response to the acceleration and braking requests, and the acceleration outputs of the three-axis accelerometer.

The utility model discloses a corrugated carton with a waterproof effect, which relates to the technical field of corrugated cartons and comprises an isolation base, anti-skid particles are mounted at the bottom of the isolation base, a support framework is mounted at the top of the isolation base, a fixing shaft penetrates through the inside of the support framework, a carton body is mounted on the inner wall of the isolation base, and a waterproof layer is mounted on the inner wall of the carton body. A polyethylene waterproof coating is arranged on the outer wall of the box body, a water-absorbent resin layer is arranged on the inner wall of the box body, a supporting rod is installed on the inner wall of the box body, and a supporting cover plate is installed at the top of the supporting rod. Through the arrangement of the isolation base and the anti-skid particles, the box bodies need to be stacked after containing goods, the surfaces of the box bodies are smooth, friction force is small, when a vehicle accelerates or suddenly stops, generated inertia force is large, the box bodies are prone to sliding off, and therefore the goods in the box bodies are damaged in a falling mode, and the friction force between the box bodies can be increased through the arrangement of the isolation base and the anti-skid particles. And the stability of the box body in the transportation process is improved.