US 5,857,443 AGranted

Devices for controlling plant, clutch slip, and idling engine speed and methods of controlling the same

AssigneesToyota Jidosha Kabushiki Kaisha, Kabushiki Kaisha Toyota Chuo Kenkyusho

InventorsKatsumi Kono, Hiroshi Ito, Kagenori Fukumura, Shinya Nakamura, Masataka Osawa, Ryoichi Hibino, Masatoshi Yamada

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Abstract

The present invention realizes high-speed and stable controls irrespective of the characteristic perturbations accompanied with the variation in operation point of a plant. The principle of the invention is applied to slip control of a lock-up clutch of a transmission and to idling engine speed control. A plant input calculation unit OC working as a controller recognizes an actual plant plus a characteristic compensator CC as an augmented plant EOB. The characteristic compensator CC compensates for the characteristic perturbations of the augmented plant EOB accompanied with the variation in operation point, so that the augmented plant EOB always works at a design point with respect to the plant input calculation unit OC working as the controller. The characteristic compensator CC compensates for frequency-dependent gain and phase deviations through filter operations and for a stationary gain deviation by multiplying predetermined constants.

Claims4

Dependent claims

A plant control device for calculating a plant input to be given to a plant, said control device comprising:

deviation detecting means for detecting a deviation of the controlled variable of said plant from a target value;
plant input calculating means for calculating a plant input corresponding to specified operation characteristics of said plant, based on said deviation;
characteristic perturbation detecting means for detecting a perturbation of said plant from specified operation characteristics;
compensating means including
input receiving means for receiving said plant input calculated by said plant input calculating means,
a plurality of filter operation means for executing a filter operation with respect to said plant input, said filter operation being based on frequency-dependent phase and gain perturbations,
multiplying means for multiplying a total of said plant input and a result of said filter operation by a correction factor, said correction factor being based on a stationary gain perturbation, so as to cancel said perturbation of operation characteristics, and
selecting means for selecting one among said plurality of filter operation means according to said perturbation;
and
outputting means for outputting a result of said multiplying by said multiplying means as a compensated plant input to said plant, so as to regulate the controlled variable of said plant to the target value.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/939,716Filed 29 Sep 1997 · division
Priority: JP 6-1528299 Jun 1994
Granted: 12 Jan 1999
Term ends: Not estimatedThe source records don’t support an estimate.

Classification39 codes

G05B 13/042
Involving the use of models or simulators: in which a parameter or coefficient is automatically adjusted to optimise the performance
B60W 10/02
Conjoint control of vehicle sub-units of different type or different function: including control of driveline clutches
B60W 10/06
Including control of propulsion units: including control of combustion engines
F16D 48/06
External control of clutches: control by electric or electronic means, e.g. of fluid pressure