Denso Corporation

Nagoya Institute of Technology

Nippon Soken, Inc.

Yoshifumi Morita

Makoto Iwasaki

Hiroyuki Ukai

Hiroyasu Otake

Ryo Kano

Takayuki Kato

Yasuhiko Mukai

Shuji Kuramitsu

Nobuyuki Matsui

Hironao Watanabe

Takaharu Kozawa

Hiroshi Ishikawa

Jirou Hayashi

Naoki Mizuno

Nobuhiko Makino

Satoru Mizuno

Shoji Sakai

Atsushi Hashikawa

Norio Tsuchida

Noriyuki Ido

Jiro Hayashi

Atsushi Ichikawa

Kazuhiro Ichikawa

Yuya Yamamoto

Akihiko Sawada

Kentaro Torii

Takeshi Wada

An electric power steering device including a column actuator disposed on a column side of the intermediate shaft and outputting a column assist torque; a rack actuator disposed on a rack side of the intermediate shaft and outputting a rack assist torque; a column torque sensor coaxially disposed with the steering shaft and detecting a column torsion torque; a rack torque sensor coaxially disposed with the intermediate shaft and detecting a rack torsion torque; and a calculator calculating instruction values of the column assist torque and the rack assist torque based on the torsion torques.

Electric power steering device

A calculator or an electronic control unit (ECU) calculates an instruction value of a column assist torque and a rack assist torque output from a column actuator, or a column motor, and a rack actuator, or a rack motor, based at least on a torsion torque. The calculator includes a base assist controller, a stabilization controller, and an adder. The base assist controller individually or commonly calculates a base assist torque based on the torsion torque. The stabilization controller individually or commonly calculates a stabilization torque for stabilizing a steering system. The adder performs addition of the base assist torque and the stabilization torque.

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.

Vehicle steering control system

An apparatus for estimating a transfer function of at target object having divided systems is disclosed. The apparatus acquires an estimation equation to estimate the transfer function of the target object, and determines, for each arithmetic operation in the estimation equation, whether the arithmetic operation is an addition or a multiplication. For the multiplication, the apparatus performs the multiplication of frequency response characteristics in the frequency domain. For addition, the apparatus converts the frequency response characteristics into time response characteristics, performs the addition of the time response characteristics in the time domain, and reconverts a result of the addition into the frequency domain.

Transfer function estimation apparatus, method and program

There is provided a control apparatus that controls a motor of an electric power steering system to assist a steering effort of an operator. The control apparatus includes a sensor, a parameter computer, a difference computer, a target torque computer, and a motor driver. The parameter computer computes a current value of one of physical parameters of one of constituents of the electric power steering system based on a steering parameter determined by the sensor referring to an equation of motion. The difference computer computes a difference between the current value of the one of the physical parameters computed by the parameter computer and a predetermined value of the one of the physical parameters. The target torque computer computes a target torque of the motor which compensates for the difference between the current value and the predetermined value of the one of the physical parameters.

Control apparatus for electric power steering system

In a steering system having a variable gear transmission system and an electrical power steering system, respective compensation amounts for first and second electric motors are produced by a first mathematical model. The compensation amounts are added to command values (v, v) to generate final command signals (i, i) to the respective electric motors. According to the above structure and operation, a mutual interference between two control systems can be suppressed.

Control device for electrical power steering system

A neural network type of apparatus is provided to detect an internal state of a secondary battery implemented in a battery system. The apparatus comprises a detecting unit, producing unit and estimating unit. The detecting unit detects electric signals indicating an operating state of the battery. The producing unit produces, using the electric signals, an input parameter required for estimating the internal state of the battery. The input parameter reflects calibration of a present charged state of the battery which is attributable to at least one of a present degraded state of the battery and a difference in types of the battery. The estimating unit estimates an output parameter indicating the charged state of the battery by applying the input parameter to neural network calculation.

Method and apparatus for detecting charged state of secondary battery based on neural network calculation

Growing community of inventors

Nagoya, Japan

Yoshifumi Morita