Jtekt Corporation

Jtekt Europe S.a.s.

Jtekt Europe

Tahar Slama

Pascal Moulaire

Terutaka Tamaizumi

Pierre Larminy

Hiroshi Kawamura

Yuji Fujita

Xavier Palandre

Sébastien Bourdrez

Romain Moretti

Nicolas Baudouin

Alain Guilemond

Arnaud Thiery

Hervé Peltier

Baptiste Hanser

Laurent Janel

An ECU controls a motor including a first coil group and a second coil group. The ECU calculates a first torque command value and a second torque command value. The ECU uses a first differential torque, which is the difference between a first theoretical output torque and a first predictive output torque, to correct the second torque command value for the second coil group. The ECU uses a second differential torque, which is the difference between a second theoretical output torque and a second predictive output torque, to correct the first torque command value for the first coil group. The ECU uses a corrected first torque command value to control power feeding to the first coil group and uses a corrected second torque command value to control power feeding to the second coil group.

Motor control device and motor control method

Method for controlling a control motor, including an engine and an engine arranged in parallel, implementing: a distribution step determining a distributed torque, and a distributed torque from a target torque; a step adding a compensation request to the first distributed torque so as to determine a target motor torque; a step adding a compensation request to the distributed torque so as to determine a target motor torque; a production step in which the engine exerts a motor torque depending on the target motor torque; a step in which the engine exerts a motor torque depending on the target motor torque; the controlling method also including a permission step, configured to limit, or respectively authorize, the compensation request of a disturbance, or respectively of a failure, of the engine, and/or the compensation request, for a disturbance, or respectively a failure, of the engine.

Method for distributing a torque to a redundant system based on a bilateral compensation architecture

A method in which a continuous estimation of the intermediate friction rate is carried out, allowing the integration of the method into a general friction compensation method so as to continuously improve the feel on the steering wheel, particularly for speeds below a determined threshold. Also, a method for friction compensation in an electrical power steering system, characterised in that the compensation method takes into account a continuous estimation of the intermediate friction rate obtained by the estimation method.

Method for friction compensation in a power steering system and associated estimation method

A steering controller includes processing circuitry configured to execute a first operation process that, when an angle command value is not input from outside of the processing circuitry, calculates a first torque command value corresponding to a steering-side operation amount and operating a drive circuit of an electric motor to adjust torque of the electric motor to the first torque command value. The processing circuitry is further configured to execute a second operation process that, when the angle command value is input from the outside of the processing circuitry, calculates a second torque command value corresponding to at least an angle-side operation amount of the steering-side operation amount and the angle-side operation amount and operating the drive circuit of the electric motor to adjust the torque of the electric motor to the second torque command value.

Steering controller and steering control method

A steering controller includes processing circuitry. The processing circuitry is configured to execute an operation process for calculating a torque command value corresponding to a sum of an amount by which the steering-side operation amount is converted into the torque required for the electric motor and an amount by which the steerable wheel-side operation amount is converted into the torque required for the electric motor and operate a drive circuit of the electric motor to adjust the torque of the electric motor to the torque command value.

A steering controller includes processing circuitry configured to execute a torque control process that calculates a steering-side operation amount, an angle feedback control process that calculates an angle-side operation amount, and an operation process that operates a drive circuit of an electric motor to adjust torque of the electric motor to a torque command value. The processing circuitry is further configured to execute a switch process that switches, when determining that a controllability of the electric motor is less than or equal to a predetermined efficiency, the torque command value from a value based on the angle-side operation amount to a value based on the steering-side operation amount instead of the angle-side operation amount.

A motor control device includes processing circuitry configured to calculate a current command value corresponding to torque that should be generated by a motor, divide the calculated current command value into individual current command values for coil groups, control power feeding to the coil groups independently for each of the coil groups based on a corresponding one of the individual current command values, set, for each one of the coil groups, an upper limit value of a corresponding one of the individual current command values and, when the individual current command value for any one of the coil groups is limited to a value that is smaller than a corresponding one of the upper limit values, supplement an amount limited in the individual current command value by increasing the individual current command value for at least a remaining one of the coil groups.

Method for monitoring the operation of a power steering system including a steering wheel, a servo motor and a monitoring module, characterized in that said method involves a step of determining at least one temporary limit value of a parameter, a step of estimating an additional value which an assistance functionality contributes to a setpoint value of the parameter, and a step of correcting the at least one temporary limit value by the additional value.

Method for supervising the operation of a power steering system

A method for controlling a power steering device including a steering assist motor and a steering wheel. In the method, a steering wheel torque setpoint is generated, the actual steering wheel torque actually exerted by the driver on the steering wheel is measured, the difference, the so-called 'steering wheel torque error', between the steering wheel torque setpoint and the actual steering wheel torque is determined, then a motor torque setpoint for the steering assist motor is generated from a first filtered proportional component on one hand, obtained by filtering via a phase-lead filter the steering wheel torque error weighted by a first assist gain, and from a second derivative return component on the other hand, obtained by calculating the time derivative of the actual steering wheel torque and weighting the derivative by means of a second derivative gain.

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Ecully, France

Tahar Slama