H/sup ∞/ control design for torque-converter-clutch slip system

Abstract

This paper describes the development ofa robust feedback controller for the torqueconverter-clutch slip control system mounted in the Toyota A245E automatic trans-axle. H"t~ntro1 theory was applied as a systematic design method in order to ensure robust stability against large variation in characteristics under vehicle operating conditions and variation in liiction characteristics ofthe clutch induced by aging deterioration. This theory enables a detailed design in the frequency domain. As aresult, the control system achieves high levels ofresponse and reliability, which contribute to a large-scale reduction ofhel consumption.

Design of a robust controller for shift control of an automatic transmission

“…From equation (1), it is clear that the slip speed is greatly influenced by the disturbance torque T d , where the turbine torque T t and the resistance torque T v are included. Because T d is estimated from the speed signals (see equations ( 2), ( 3) and ( 5)), a disturbance compensator can be designed to eliminate or reduce the effect of the disturbance on the system output.…”

“…Compared with other stepped-ratio transmissions, an automatic transmission (AT) with a hydraulic torque converter provides a smoother start-up and gear shift. Although it is often pointed out that an AT has a worse fuel efficiency, some newly developed technology, such as slip control of the lock-up clutch, 1 has greatly improved the fuel economy of an AT.…”

Slip control during inertia phase of clutch-to-clutch shift using model-free self-tuning proportional-integral-derivative control

“…Control law during the inertia phase of an automated transmission has been studied in various ways by using model-based control. [7][8][9][10][11][12][13] For example, it is possible to study differential rotation speed control by using robust control such as H N control. Although H N control can ensure stability by considering the modeling error in advance, it is usually necessary to estimate the large modeling error when a multi-domain complex system like an AT, which includes hydraulic, electric, and mechanical domains, is targeted.…”

Study of control for the automated clutch of an automated manual transmission vehicle based on rapid control prototyping

“…Servo actuation in conventional manual transmissions has increasingly gained much attention recently [1][2][3]. An automated manual transmission (AMT) can be constructed on the basis of a conventional manual transmission by adding a servo actuator and control system.…”