A method for determining a driving state of a vehicle includes determining a torque command of a vehicle drive apparatus based on vehicle driving information collected during driving of the vehicle, determining an acceleration error defined as a difference between a reference longitudinal acceleration of the vehicle interlocked with the torque command and a measured longitudinal acceleration of the vehicle, determining an acceleration disturbance rate defined as a difference between an actual rotational acceleration of the vehicle drive and a reference drive apparatus rotational acceleration interlocked with the torque command based on the determined torque command, integrating the determined acceleration disturbance rate to determine the acceleration disturbance, and determining a current vehicle driving state of the vehicle based on the determined acceleration error, the determined acceleration disturbance rate and the acceleration disturbance.

An apparatus is obtained which provides, to a vehicle, information on a road-surface and that on an obstacle(s), and information on the degree of reliability, on the basis of information received from roadside units. The apparatus includes a communications circuitry to receive obstacle information from the roadside units where each unit includes a plurality of sensors to detect the obstacle(s) within a predetermined field of view. A reliability determinator determines the degree of reliability of information on an obstacle(s) received, and outputs a reliability value on the bases of the number of roadside units detecting the same obstacle, the number of sensors in one roadside unit detecting the same obstacle, and a difference value of detecting the same obstacle between different roadside units or that of detecting the same obstacle between different sensors; and a correction term is outputted on the basis of information on a road-surface condition.

The present invention prevents occurrence of abnormal noise and swing of a vehicle in mitigating braking force of a steered wheel while reducing a steering load at the time of stationary steering to reduce a burden of a steering device and reducing stress accumulation due to stationary steering to reduce burdens of a tire, a suspension device and the steering device. The present invention includes a stop braking force control unit 202 that individually controls braking forces of steered wheels 51 and 52 and non-steered wheels 53 and 54 at the time of deceleration of the vehicle, and a pre-detection unit 203 that detects steering in a stopped state of the vehicle in advance, in which the stop braking force control unit executes, when the steering in a stopped state of the vehicle is detected in advance by the pre-detection unit, braking force mitigation control to decrease the braking forces of the steered wheels to be lower than the braking forces at the time of normal braking.

A controller is provided for a vehicle having front and rear axles, each axle having two wheels, and first and second propulsion units. The controller controls the first and second propulsion units to generate a combined torque with reference to a total requested torque. The controller is configured to: receive a torque request signal; receive traction signals indicating available traction at at least one wheel; determine a traction torque range defined by a maximum and minimum torque for at least one of the at least first or second propulsion units in dependence on one or more of the traction signals; determine a proposed distribution of torque between each of the at least first and second propulsion units with reference to the total requested torque; and determine a proposed torque to be generated by each of the at least first and second propulsion units based on the proposed distribution of torque.

A method for controlling wheel slip of a vehicle includes obtaining operation state information of a driving system, determining the speed of a backlash component between a drive apparatus and a drive wheel of the vehicle based on the obtained operation state information of the driving system, determining a reference speed for controlling wheel slip, determining a control input value for controlling the wheel slip based on a driving system speed, the speed of the backlash component, and the reference speed, using the control input value to determine whether wheel slip occurs, determining a torque correction amount based on the control input value when it is determined that wheel slip has occurred, and correcting a torque command of the drive apparatus according to the torque correction amount.

A system calibrates a function of a tire friction of a vehicle traveling on a road from motion data including a sequence of control inputs to the vehicle that moves the vehicle on the road and a corresponding sequence of measurements of the motion of the vehicle moved by the sequence of control inputs. The system updates iteratively the probability distribution of the tire friction function until a termination condition is met, wherein, for an iteration, the system samples the probability distribution of the tire friction function, determines a state trajectory of the vehicle to fit the sequence measurements according to the measurement model and the sequence of control inputs according to the motion model including the sample of the tire friction function, and updates the probability distribution of the tire friction function based on the state trajectory of the vehicle.

The present disclosure relates to a method and system for integrated path planning and path tracking control of an autonomous vehicle. The method includes: obtaining five input control variables and eleven system state variables of an autonomous vehicle at current time; constructing a vehicle path planning-tracking integrated state model according to the obtained variables at the current time; enveloping external contours of two autonomous vehicles using elliptical envelope curves to determine elliptical vehicle envelope curves of the two autonomous vehicles, respectively; determining time to collision (TTC) between the vehicles according to elliptical vehicle envelope curves and vehicle driving states; establishing an objective function of a model prediction controller (MPC) according to the model; and solving the objective function based on the TTC, and determining input control variables to the MPC at the next time. Autonomous vehicle collision avoidance can be achieved according to the present disclosure.

A method for determining a wet road condition includes receiving a value of a received signal strength index of an RF signal received from a sensor associated with a wheel of a vehicle, comparing the value to a predetermined threshold value, and if the value is less than the predetermined threshold value, determining that a wet road condition is met and outputting a pre-aquaplaning warning signal. A system for determining a wet road condition and a non-transitory computer program product are also provided.

A vehicle control system is configured to, when anti-skid control is started in a situation in which driving support control is being executed, execute a specific process for making a stop condition of the anti-skid control difficult to be satisfied as compared to when the driving support control is not being executed.

A method for controlling a torque of at least one wheel of a mobile platform. The method includes: providing at least one current slip value of the wheel and at least one current wheel acceleration of the wheel as input values; providing a trained radial basis function network designed to determine, by means of the input values, at least one torque change as an output value for control of the at least one wheel; and determining a current torque change, by means of the trained radial basis function network and the provided input values, for control of the torque.