Adaptive compensation control of vehicle automatic transmissions for smooth shift transients based on intelligent supervisor

Deok Ho Kim, Jin Oh Hahn, Byung Kwan Shin, Kyo Il Lee

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, an advanced shift controller that supervises the shift transients with adaptive compensation is presented. Modern shift control systems for vehicle automatic transmission are designed to provide smooth transients for passengers' comfort and better component durability. In the conventional methods, lots of testing and calibration works have been done to tune gains of the controller, but it does not assure optimum shift quality at all times owing to system variations often caused by uncertainties in shifting hydraulic systems and external disturbances. In the proposed control scheme, an adaptive compensation controller with intelligent supervisor is implemented to achieve improved shift quality over the system variations. The control input pattern which generates clutch pressure commands in hydraulic actuating systems, is updated through a learning process to adjust for each subsequent shift based on continuous monitoring of shifting performance and environmental changes. The proposed algorithm is implemented and evaluated on the experimental test setup. Results from the experimental studies for several operation modes show both improved performance and adaptability of the proposed shift controller to uncertain changes of the shifting environment in vehicle power transmission systems.

Original languageEnglish (US)
Pages (from-to)1472-1481
Number of pages10
JournalKSME International Journal
Volume15
Issue number11
DOIs
StatePublished - Nov 2001
Externally publishedYes

Keywords

  • Adaptive Compensation
  • Intelligent Supervisor
  • Power Transmission Systems
  • Shift Controller

ASJC Scopus subject areas

  • Mechanical Engineering

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