Denso Corporation

Nagoya Institute of Technology

Hiroyuki Ukai

Makoto Iwasaki

Yoshifumi Morita

Yasuhiko Mukai

Nobuyuki Matsui

Hiroshi Ishikawa

Jirou Hayashi

Hiroyasu Otake

Nobuhiko Makino

Ryo Kano

Norio Tsuchida

Noriyuki Ido

Jiro Hayashi

Kazuhiro Ichikawa

Kentaro Torii

Takeshi Wada

Yuya Yamamoto

Akihiko Sawada

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

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Nagoya, Japan

Hiroyuki Ukai