DAX/MED2—A Diagnostic Expert System for Quality Assurance of an Automatic Transmission Control Unit

1991 ◽  
pp. 113-126 ◽  
Author(s):  
FRANK PUPPE ◽  
THOMAS LEGLEITNER ◽  
KLAUS PETER HUBER
Keyword(s):  
Quality Assurance ◽  
Expert System ◽  
Automatic Transmission ◽  
Control Unit ◽  
Transmission Control

Research on an Approximate Model Based Virtual Calibration Method With DoE and Optimization Algorithm for Transmission Control Unit

2013 ◽  
Author(s):  
Guangqiang Wu ◽  
Lu Sun ◽  
Sheng Zhu ◽  
Kuankuan Zhang
Keyword(s):  
Subjective Experience ◽  
Automatic Transmission ◽  
Control Unit ◽  
Calibration Method ◽  
Approximate Model ◽  
Optimal Parameters ◽  
Latin Hypercube Design ◽  
Transmission Control ◽  
The Neural Network ◽  
Optimal Latin Hypercube Design

In order to solve the problems arising from the manual calibration method in the developing process of vehicle automatic transmission control unit (TCU), known as time-consuming, heavy workload, high cost and over-dependence on subjective experience, this article researches on a virtual calibration method based on an approximate model to obtain optimal parameters for TCU. The neural network approximate model is established from the test data chosen with the method of DoE (Design of Experiment). The virtual calibration method is then conducted through Optimal Latin Hypercube Design (OLHD) and multi-island genetic algorithm (MIGA) to search the optimal parameters. By comparing the new calibration method with original manual one on the condition of gear 1 up to gear 2, the result shows that the new method can increase the efficiency significantly.

A Systematic Approach for Dynamic Analysis of Vehicles With Eight or More Speed Automatic Transmission

2014 ◽  
Vol 136 (5) ◽  
Author(s):  
Sangchul Lee ◽  
Yi Zhang ◽  
Dohoy Jung ◽  
Byungchan Lee
Keyword(s):  
Dynamic Behavior ◽  
Test Data ◽  
Performance Metrics ◽  
Automatic Transmission ◽  
Control Unit ◽  
Torque Converter ◽  
Fine Tuning ◽  
Transmission Control ◽  
Engine Torque ◽  
Shift Quality

In this study, a dynamic model of a vehicle with eight or more speed automatic transmission (A/T) has been developed for the analysis of shift quality and dynamic behavior of the vehicle during shift events. Subsystem models for engine, torque converter, automatic transmission, drivetrain, transmission control unit (TCU), and vehicle are developed and integrated with signal information interface. The subsystems included in the model were carefully selected to improve the accuracy of the model by comparing the simulation results with the test data. The systematic modeling approach based on matrix operation proposed in the study enables calibrating and fine-tuning the transmission control unit for shift quality in a virtual vehicle environment. The model presented in the study is validated with the vehicle test data and the comparison shows very good agreement. This paper presents a generalized modeling methodology for multiratio automatic transmissions that require both direct and indirect shifts. The model developed in the study provides a valuable analytical tool for the calibration and tuning of the transmission control unit by allowing quantitative analysis on the dynamic behavior and the performance metrics of an automatic transmission.

Control System Integration for Dual Clutch Transmissions Based on Modular Approach

2013 ◽  
Vol 390 ◽  
pp. 419-423
Author(s):  
Yong Gang Liu ◽  
Zhen Zhen Lei ◽  
Li Lai Lu ◽  
Liang Chen
Keyword(s):  
System Integration ◽  
Control Strategies ◽  
Control Unit ◽  
Vehicle Control ◽  
Modular Approach ◽  
Control Logic ◽  
Transmission Control ◽  
Modeling Process ◽  
Clutch Control ◽  
And Control

Modular approach has been adopted in this paper to divide DCT transmission control unit into four modules, which are clutch control, synchronizer control, shift assembly control and vehicle control respectively. The function for each module has been analyzed and the control logic relations among these modules have also been established for modular integration. Moreover, the modeling process and control strategies for each module have been established for respective control objection. On this basis, the simulation model of transmission control unit for DCT has been built using the Matlab/Simulink platform, and the simulation has been carried out at given throttle opening. The results show that the control strategy of transmission control unit for DCT has been validated, which provides theoretical basis for DCT product development.

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