摘要:
A method for allocating forces among the corners of a vehicle having a redundant actuator suite includes determining a set of desired forces at the center of gravity of the vehicle, and allocating the set of desired forces among the corners of the vehicle as virtual control commands using a controller. The method also includes mapping the virtual control commands at the corners to actual or true control commands at the corners, and controlling a plurality of actuators at the corners using the actual or true control commands. The actuators may include friction brakes and wheel motors. Mapping the virtual control commands may include using a Least Squares formulation. Control of the actuators may be prioritized with respect to each other using weighting matrices. A vehicle includes a controller having actuators and a controller configured for executing the above method.
摘要:
A method to control a vehicle having a plurality of wheels includes monitoring desired vehicle dynamics, determining a desired corner force and moment distribution based upon the desired vehicle dynamics and a real-time closed form dynamics optimization solution, and controlling the vehicle based upon the desired corner force and moment distribution. The real-time closed form dynamics optimization solution is based upon a minimized center of gravity force error component, a minimized control energy component, and a maximized tire force reserve component.
摘要:
A method for allocating forces among the corners of a vehicle having a redundant actuator suite includes determining a set of desired forces at the center of gravity of the vehicle, and allocating the set of desired forces among the corners of the vehicle as virtual control commands using a controller. The method also includes mapping the virtual control commands at the corners to actual or true control commands at the corners, and controlling a plurality of actuators at the corners using the actual or true control commands. The actuators may include friction brakes and wheel motors. Mapping the virtual control commands may include using a Least Squares formulation. Control of the actuators may be prioritized with respect to each other using weighting matrices. A vehicle includes a controller having actuators and a controller configured for executing the above method.
摘要:
A method to control a vehicle including control of regenerative brakes and friction brakes includes monitoring a desired corner force and moment distribution, monitoring real-time actuator constraints including a braking torque limit of each of the regenerative brake, determining a regenerative braking torque for each of the regenerative brakes based upon the desired corner force and moment distribution and the real-time actuator constraints, determining a friction braking torque for each of the friction brakes based upon the desired corner force and moment distribution and the determined regenerative braking torque for each of the regenerative brakes, and controlling the vehicle based upon the determined regenerative braking torques and the determined friction braking torques.
摘要:
A method to control a vehicle including control of regenerative brakes and friction brakes includes monitoring a desired corner force and moment distribution, monitoring real-time actuator constraints including a braking torque limit of each of the regenerative brake, determining a regenerative braking torque for each of the regenerative brakes based upon the desired corner force and moment distribution and the real-time actuator constraints, determining a friction braking torque for each of the friction brakes based upon the desired corner force and moment distribution and the determined regenerative braking torque for each of the regenerative brakes, and controlling the vehicle based upon the determined regenerative braking torques and the determined friction braking torques.
摘要:
A method to control a vehicle includes monitoring desired vehicle force and moment, monitoring real-time corner constraints upon vehicle dynamics which includes monitoring corner states of health for the vehicle, and monitoring corner capacities for the vehicle. The method further includes determining a desired corner force and moment distribution based upon the desired vehicle force and moment and the real-time corner constraints, and controlling the vehicle based upon the desired corner force and moment distribution.
摘要:
A method to control a vehicle includes monitoring desired vehicle force and moment, monitoring real-time corner constraints upon vehicle dynamics which includes monitoring corner states of health for the vehicle, and monitoring corner capacities for the vehicle. The method further includes determining a desired corner force and moment distribution based upon the desired vehicle force and moment and the real-time corner constraints, and controlling the vehicle based upon the desired corner force and moment distribution.
摘要:
A method for detecting and isolating an actual fault in a fuel delivery system having a fuel pump and a fuel pump motor, includes monitoring fuel pressure, pump current, and pump voltage. Each of a plurality of fault triggers are designated as one of flagged and un-flagged based on at least one of the fuel pressure, the pump current and the pump voltage. The actual fault in the fuel delivery system is isolated from a plurality of possible faults when a condition respective to one of the possible faults is satisfied based on at least one of the plurality of fault triggers designated as flagged and un-flagged.
摘要:
A method of estimating a tire-road friction coefficient includes determining when the slope of a tire characteristic curve relating a utilized longitudinal friction of a tire to longitudinal slip of the tire is linear and non-linear. When the slope of the tire characteristic curve is linear, then the tire-road friction coefficient is estimated by correlating the slope of the tire characteristic curve to the tire-road friction coefficient. When the slope of the tire characteristic curve is non-linear, indicating that the tire is near or at saturation, then the tire-road friction coefficient is estimated by calculating a current utilized longitudinal friction of the tire.
摘要:
A cooperative diagnostic and prognosis system for generating a prognosis of at least one component in a vehicle. An in-vehicle diagnostic unit determines a diagnostic signature of the component each time an occurrence of a condition is triggered and transmits the diagnostic signature to an off-board diagnostic unit. The off-vehicle diagnostic unit determines a SOH of the component and a rate-of-change in the SOH of the component. The off-vehicle diagnostic unit determines whether the rate-of-change in the SOH is greater than a threshold. The off-vehicle diagnostic unit requests additional information from the vehicle in response to the rate-of-change in the SOH being greater than the threshold. The additional information relating to operating parameter data associated with the component. The off-vehicle diagnostic unit receives the requested information and predicts a time-to-failure of the component.