A method for determining a current road friction value (μ) using a control device in a motor vehicle continuously calculates a current friction value demand (μ) by the control device. A current tire stiffness (St) is determined from the calculated current friction value demand (μ) and a current…
A road surface friction coefficient estimating device (40; 102) includes an electronic control unit. The electronic control unit is configured to: compute a system noise variance value as an index indicating a degree of variation in a road surface friction coefficient estimation value; compute an…
A vehicle control method, comprising: step (S 1), acquiring a slip ratio in a current control cycle of a vehicle; step (S2), invoking a corresponding calculation strategy according to the slip ratio, to calculate a road friction coefficient in the current control cycle of the vehicle; and step…
A computing device, method and computer program product are provided for facilitating modification of the route of an autonomous surface vehicle. In the context of a method, a stylized image of an input image, such as a photographic image, is constructed. The stylized image distinguishes between…
Methods and a system for estimating a coefficient of friction of a surface being traveled upon by a vehicle is disclosed. The methods and systems may be active when wheel slip is not present and while wheel slip is present. The coefficient of friction for the surface being traveled upon may be…
A method for determining a current road friction value (μ) using a control device in a motor vehicle continuously calculates a current friction value demand (μ) by the control device. A current tire stiffness (St) is determined from the calculated current friction value demand (μ) and a current…
Examples provide a system and method for controlling a vehicle or a fleet of vehicles. The system includes a set of vehicle sensors configured to measure a speed of the vehicle and a motor torque. The system also includes an electronic processor configured to determine a modeled rack force of the…
A computer implemented method for determining a road friction condition associated with at least one wheel on a heavy-duty vehicle includes transmitting a radar signal by at least one polarimetric radar transceiver towards a surface supporting the vehicle, and receiving backscatter from the…
Disclosed is a method, product, and system including the use of or using differential braking to determine a surface type or friction level under a road wheel of a vehicle and communicating the determined surface type or friction level under the road when to another system or component of the…
A safety system for a vehicle may include one or more processors configured to determine, based on a friction prediction model, one or more predictive friction coefficients between the ground and one or more tires of the ground vehicle using first ground condition data and second ground condition…
Systems and techniques are described for improving the accuracy of autonomous vehicle simulations by dynamically assigning friction coefficients to road features based on sensor data. A method of the disclosed technology can include steps for associating a predetermined friction coefficient to road…
A control system () for controlling an active suspension system () of a vehicle () to determine relative traction levels, the control system comprising one or more controller (), wherein the control system is configured to (): control the active suspension system to change normal force through a…
Embodiments include apparatuses, methods, and systems for computer assisted or autonomous driving (CA/AD). An apparatus for CA/AD may include a sensor interface, a communication interface, and a driving strategy unit. The sensor interface may receive sensor data indicative of friction between a…
A vehicle includes a first detector detecting first information related to a condition of a first road surface; a second detector contactlessly detecting second information related to a condition of a second road surface; and a controller controlling a driving force of the vehicle using a friction…
An apparatus and method for predicting a friction coefficient of a road surface are disclosed. The apparatus includes a microphone that obtains a sound signal around a tire mounted on a vehicle, and a controller that estimates a state and a type of the road surface and a degree of tire wear…
A method for vehicle control, including: obtaining a slip ratio in a current control cycle of a vehicle; calculating a road friction coefficient in the current control cycle of the vehicle by invoking a corresponding calculation strategy according to the slip ratio; and controlling the vehicle in…
An autonomous vehicle has a temperature sensor for sensing an air temperature or a road temperature, a processor communicatively connected to the temperature sensor to receive a signal from the temperature sensor, to process the signal and to generate an estimated instantaneous coefficient of…
Vehicle alert and control systems and methods taking into account a detected road friction at a following vehicle and a predicted road friction by the following vehicle. The detected road friction between the following vehicle tires and the road surface may be assessed using a variety of…
A distributed computing system for determining road surface traction capacity for roadways located in a common spatio-temporal zone includes a plurality of vehicles that each include a plurality of sensors and systems that collect and analyze a plurality of parameters related to road surface…
The disclosure generally pertains to systems and methods for providing off-road track drivability guidance. In an example scenario, a processor receives a sensor signal that is generated when a vehicle is driven on an off-road track. The processor evaluates the sensor signal to obtain information…
Systems and methods are provided for generating data indicative of a friction associated with a driving surface, and for using the friction data in association with one or more vehicles. In one example, a computing system can detect a stop associated with a vehicle and initiate a steering action of…
A safety system for a vehicle may include one or more processors configured to determine, based on a friction prediction model, one or more predictive friction coefficients between the ground and one or more tires of the ground vehicle using first ground condition data and second ground condition…
A method of controlling a vehicle having wheels provided with tires resting on a surface, the method using a model of the physical behavior of each tire as a function of a sideslip angle (β) for each tire relative to the surface. The model is obtained by implementing an adaptive algorithm that…
A vehicle and a system and method of controlling the vehicle. The system includes a sensor and a processor. The sensor obtains a first estimate of a force on a tire of the vehicle based on dynamics of the vehicle. The processor is configured to obtain a second estimate of the force on the tire…
A road friction coefficient of a vehicle is estimated by obtaining substantially contemporaneous values associated with a steering angle for a steered axle of the vehicle, a lateral acceleration, a yaw acceleration, an alignment torque and an axle load on the steered axle; estimating a lateral tire…
A method for processing friction data for vehicle tires on road segments, implemented by a processing system including at least one computer and an interface for remote communication with a plurality of vehicles, the method including: acquiring, from the plurality of vehicles, friction data for…
A vehicle control device configured to control switching of drive mode of a vehicle including an internal combustion engine and a motor includes a processor configured to switch, in a case where a road surface of a perimeter of a geofencing zone is a road surface on which there is a high…
A method for adaptive estimation of a road surface adhesion coefficient for a vehicle with complex excitation conditions taken into consideration comprises the following steps: 1) designing an estimator according to a single-wheel dynamics model of a vehicle, and estimating a longitudinal tire…
A road condition estimation device includes: a reception unit that receives pieces of sensor information from automobiles respectively, each piece of sensor information including positional information that is information regarding a position at which an automobile travels, and spectral information…
An information processing system includes one or more vehicles, and a server communicable with the one or more vehicles. The vehicle acquires an image obtained by imaging a road on which a host vehicle is located. The vehicle or the server determines a degree of difficulty in traveling on the road…