A method for controlling an active rear axle steering of a motor vehicle when steering out from straight travel with given actual dynamics of the wheel guidance of the motor vehicle, wherein an actual steering signal of the motor vehicle is received by a control circuit from at least one sensor, then from the actual steering signal a dynamic model of the wheel guidance calculates a time variation of a differential signal describing a deviation of the actual steering signal from an imaginary nominal steering signal which would be needed in order to perform the steering with a given nominal dynamics, and from the differential signal a predetermined conversion rule is used to generate a nominal steering signal for the rear axle steering and the rear axle steering is actuated with this.

Disclosed is a corner module apparatus for a vehicle. The apparatus includes processors configured to obtain driving state information and driving environment information of the vehicle, and a controller configured to calculate information on a distance up to a target point based on the driving state information and the driving environment information obtained by the processors. The target point is a target of a movement of the vehicle. The controller is configured to calculate a target curvature based on the calculated information on the distance. The calculated target curvature is a curvature of a target trajectory up to the target point. The controller is configured to calculate a target steering angle of each of four wheels of the vehicle based on the calculated target curvature, and independently control steering of each of the four wheels based on the calculated target steering angle.

Four-wheel steering of a vehicle, e.g., in which leading wheels and trailing wheels are steered independently of each other, can provide improved maneuverability and stability. A first vehicle model may be used to determine trajectories for execution by a vehicle equipped with four-wheel steering. A second vehicle model may be used to control the vehicle relative to the determined trajectories. For instance, the second vehicle model can determine leading wheels steering angles for steering leading wheels of the vehicle and trailing wheels steering angles for steering trailing wheels of the vehicle, independently of the leading wheels.

An integrated control system for a vehicle is provided. The system includes a friction coefficient calculation unit that calculates friction coefficients of left side and right side road surfaces, respectively, based on vehicle wheel state information and a predetermined setting information collected during ABS operation. A feedforward braking pressure calculation unit calculates a feedforward braking pressure of each vehicle wheel using the friction coefficients. An ABS braking pressure calculation unit calculates an ABS braking pressure of the each vehicle wheel based on the feedforward braking pressure and slip rate information. A rear wheel steering control amount calculation unit calculates a rear wheel steering control amount for yaw compensation using the ABS braking pressure of each vehicle wheel and a rear wheel steering controller executes a rear wheel steering control according to the rear wheel steering control amount.

A rear wheel steering system may include: a vehicle speed detection unit configured to detect a vehicle speed; a steering angle detection unit configured to detect a steering angle based on an operation of a steering wheel; a pinion angle detection unit configured to detect a pinion angle based on an operation of the steering wheel; a rear wheel driving unit configured to steer rear wheels; and a control unit configured to receive the vehicle speed, the steering angle, and the pinion angle from the vehicle speed detection unit, the steering angle detection unit, and the pinion angle detection unit, calculate a target rear wheel steering angle for steering the rear wheels, calculate a final rear wheel steering angle at which a steering point of the rear wheels is adjusted using a steering angle speed, the vehicle speed, and the pinion speed, and operate the rear wheel driving unit.

A control system calculates inputs to a control target that has m inputs and n outputs (m=n, each of m and n is a natural number that is more than one), while designating a plurality of combinations of the inputs and the outputs. A feedback controller calculates, with respect to each designated combination, a control input to a non-interference controller based on a difference between a target value and a current value of the control quantity to make the current value follow the target value. The non-interference controller executes, with respect to each designated combination, a non-interference control to reduce influence due to mutual interference between n control quantities. This reduces the number of combinations of the inputs and the outputs, the combinations whose mutual interference needs considering; thereby, the non-interference control may be easily achieved.

A vehicle adaptive steering control apparatus includes a front wheel steering mechanism having a right wheel steering portion and a left wheel steering portion. A left front wheel rotatably is coupled to the left wheel steering portion. A right front wheel rotatably coupled to the right wheel steering portion. A controller in electronic communication with a steer-by-wire steering wheel assembly and the front wheel steering mechanism operates the front wheel steering mechanism to turn the left front wheel and the right front wheel in accordance with Ackerman steering geometry. The controller is also configured to calculate toe angle adjustments for the right wheel steering portion relative to the left wheel steering portion and make the toe angle adjustments to right wheel steering portion and the left wheel steering portion during turning and steering movements effected by the right wheel steering portion and the left wheel steering portion.

A vehicle adaptive steering control apparatus includes a front wheel steering mechanism having a right wheel steering portion and a left wheel steering portion that are independently operable relative to one another. A load detection device measures a condition indicative of vehicle loads at one of the following: the left and right suspension structures and the front wheel steering mechanism. A controller in electronic communication with a steer-by-wire steering wheel assembly, the front wheel steering mechanism and the load detection device, calculates toe angle adjustments for each of the right wheel steering portion and the left wheel steering portion in response to determining a load on each of a left front wheel and a right front wheel based on signals from the load detection device. The controller further makes the toe angle adjustments via changes in turning and steering movements effected by the front wheel steering mechanism.

System, methods, and other embodiments described herein relate to emulating vehicle dynamics. In one embodiment, a method for emulating vehicle dynamics in a vehicle having a plurality of wheels and equipped with all-wheel steering, includes receiving emulation settings that indicate one or more environment parameters and/or vehicle parameters, detecting driver inputs including at least steering input and throttle input, executing a simulation model that receives the driver inputs and emulation settings, simulates the vehicle operating based on the driver inputs and the emulation settings, and outputs one or more simulated states of the vehicle based on the simulated operation of the vehicle, determining one or more actuation commands for each wheel of the vehicle to cause the vehicle to emulate the one or more simulated states, and executing the one or more actuation commands, wherein the actuation commands include at least wheel angle commands and torque commands.

According to one embodiment, a method, computer system, and computer program product for preventing tipping of a load during transport by a vehicle is provided. The present invention may include retrieving a tipping point of the load, based on a center of gravity of the load, a speed of the vehicle, and a turning radius of the vehicle, wherein the tipping point is based on a simulation utilizing finite element analysis; and responsive to determining that the center of gravity of the load is within a threshold distance of the tipping point, taking a corrective action which may include controlling the speed or turning radius of the vehicle.