摘要:
An electric power steering system includes a motor and a soft-disable controller in signal communication with the motor for reducing the abruptly increased reaction torque felt by a driver when an assist torque is abruptly disabled.
摘要:
An electric power steering system includes a motor and a soft-disable controller in signal communication with the motor for reducing the abruptly increased reaction torque felt by a driver when an assist torque is abruptly disabled.
摘要:
A method and system for estimating a parameter of an electric machine, including a controller and a switching device, the controller responsive to at least one of: a current sensor, and a temperature sensor. Where the controller executes a parameter estimation process, which is responsive to at least one of: a current value and a temperature estimate and the resultant of the parameter estimation process representing an estimated parameter of the electric machine. The parameter estimation includes a method for estimating a temperature of the electric machine comprising: the temperature sensor operatively connected to and transmitting a temperature signal corresponding to a measured temperature to a controller, which executes the temperature estimation process responsive to a temperature signal from the temperature sensor.
摘要:
A system for providing enhanced steering pull compensation is provided. The system compensates for steering pull in a vehicle using a signal from a pull compensation signal generator. The signal from the pull compensation signal generator is processed though a processing mechanism. The processing mechanism controls a power steering assist motor through fault and limit logic as a function of the pull compensation signal generator, thereby providing steering pull compensation. The processing mechanism also controls the power steering assist motor based on input from a vehicle speed sensor and a calibration input mechanism.
摘要:
A control system for electric power steering develops a desired operator exerted steering torque command independent of operator exerted torque, compares that command to a measure of actual operator exerted steering torque and controls an electric motor providing electric power steering assist to minimize the difference between the desired operator exerted steering torque command and the actual operator exerted steering torque.
摘要:
A motor control system is provided, including a motor and a control module. The motor operates at a rotational velocity, and creates a regenerative current. The motor has a target field weakening current that is configured for limiting the regenerative current to a threshold value. The control module is in communication with the motor. The control module receives a motor torque command. The control module includes control logic for identifying the target field weakening current based upon the motor torque command and the rotational velocity of the motor.
摘要:
A method for generating an active damping torque signal for a vehicle steering system includes receiving a vehicle speed input, receiving a handwheel velocity input, receiving a handwheel torque input, and generating an active damping torque output from each of the inputs, wherein the active damping torque output is non-linear with respect to the handwheel velocity input.
摘要:
A method for controlling the response of an electric steering system by implementing damping for over-speed conditions is disclosed. The method includes the step of determining the velocity of an electric motor within the electric steering system, and determining a voltage limit value, wherein the voltage limit value is calculated as a function of the velocity of the electric motor. The method further includes the step of associating the voltage limit value with a motor voltage command in order to produce a limited voltage command, and applying the limited voltage command to the motor in order to provide a braking torque to the motor.
摘要:
The present invention relates to a method for controlling the response of an electric steering system by implementing damping for over-speed conditions, the method comprising the steps of determining the velocity of an electric motor comprised within the electric steering system, and determining a voltage limit value, wherein the voltage limit value is calculated as a function of the velocity of the electric motor. The method further comprises the steps of associating the voltage limit value with a motor voltage command in order to produce a limited voltage command, and applying the limited voltage command to the motor in order to provide a braking torque to the motor.
摘要:
A method, system, and apparatus for providing enhanced steering pull compensation are provided. The method compensates for steering pull in a vehicle steering system that includes a handwheel. The method includes monitoring the vehicle to determine whether the vehicle is heading forward along a substantially linear straight-ahead path and, if so, measuring handwheel torque, as a sensed torque signal, to determine an amount of steering pull existing at the handwheel. The method also includes generating a torque assist signal in response to the sensed torque signal and calculating an offset signal for reducing the amount of steering pull to substantially zero. The method further includes producing a modified torque assist signal by adding the offset signal to the torque assist signal, and applying the modified torque assist signal to the vehicle steering system.