MIXED STEERING ASSISTANCE COMPRISING A TORQUE CONTROL LOOP SETPOINT-PILOTED BY A POSITION CONTROLLER INTENDED FOR PATH CONTROL
First Claim
1. A method for managing a power steering comprising at least one steering wheel and at least one assist motor, said method comprises a driver torque control step (b), comprising measuring the effective driver torque which is actually exerted, at the considered instant, by the driver on the steering wheel, and then comparing said effective driver torque to a predetermined driver torque setpoint in order to assess a driver torque deviation which corresponds to the difference between the effective driver torque and said driver torque setpoint, and then determining, from this driver torque deviation, a motor torque setpoint intended to be applied to the assist motor in order to reduce said driver torque deviation, and in that the driver torque setpoint which is used during the driver torque control step (b) is generated during a path control step (a) that comprises measuring the effective value of at least one parameter called <
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path parameter>
>
, which is representative of the effective path of the vehicle, and then comparing this path parameter to a path setpoint, which is predetermined depending on a reference path that the vehicle is desired to follow automatically, in order to assess a path deviation which corresponds to the difference between said path setpoint and the effective value of the path parameter, and then determining, from this path deviation, a driver torque setpoint intended to reduce said path deviation.
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Accused Products
Abstract
A method for managing a power steering system including at least one steering wheel and at least one assist motor, the method including a step of driver torque control, which involves evaluating a driver torque difference that corresponds to the difference between a predefined driver torque setpoint and the actual driver torque actually exerted by the driver on the steering wheel, then determining an engine torque setpoint for torque applied to the assist motor in order to reduce the driver torque difference, the driver torque setpoint being generated during a trajectory control step, which involves evaluating a trajectory difference, for example a position difference, which corresponds to the difference between a trajectory setpoint, of the position setpoint type, which depends on a reference trajectory, and the actual trajectory of the vehicle, given by the measured position of the power steering, then determining, from the trajectory difference, a driver torque setpoint intended to reduce the trajectory difference.
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Citations
10 Claims
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1. A method for managing a power steering comprising at least one steering wheel and at least one assist motor, said method comprises a driver torque control step (b), comprising measuring the effective driver torque which is actually exerted, at the considered instant, by the driver on the steering wheel, and then comparing said effective driver torque to a predetermined driver torque setpoint in order to assess a driver torque deviation which corresponds to the difference between the effective driver torque and said driver torque setpoint, and then determining, from this driver torque deviation, a motor torque setpoint intended to be applied to the assist motor in order to reduce said driver torque deviation, and in that the driver torque setpoint which is used during the driver torque control step (b) is generated during a path control step (a) that comprises measuring the effective value of at least one parameter called <
- <
path parameter>
>
, which is representative of the effective path of the vehicle, and then comparing this path parameter to a path setpoint, which is predetermined depending on a reference path that the vehicle is desired to follow automatically, in order to assess a path deviation which corresponds to the difference between said path setpoint and the effective value of the path parameter, and then determining, from this path deviation, a driver torque setpoint intended to reduce said path deviation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A power steering management module comprising a driver torque control module, which receives in input, on the one hand, a driver torque setpoint and, on the other hand, a measurement of the effective driver torque which is actually exerted, at the considered instant, by the driver on the steering wheel, which assesses a driver torque deviation which corresponds to the difference between the effective driver torque said driver torque setpoint, and which provides, in output, depending on said driver torque deviation, a motor torque setpoint, intended to be applied to the assist motor in order to reduce said driver torque deviation, said management module also comprising a path control module which receives, in input, a path setpoint which is predetermined depending on a reference path that the vehicle is desired to follow automatically, as well as a measurement of the effective value of at least one parameter called <
- <
path parameter>
>
, which is representative of the effective path of the vehicle, and wherein said path control module then assesses a path deviation which corresponds to the difference between said path setpoint and the effective value of the path parameter, and then provides, in output, connected to the corresponding input of the driver torque control module, a driver torque setpoint determined from the path deviation and intended to reduce said path deviation. - View Dependent Claims (10)
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Specification