臺灣博碩士論文加值系統

本論文主要是描述一種利用控制器區域網路 (Controller Area Network Bus, CAN bus)為基礎的集中控制系統(Concentrate control system)，以發展一具有強健性和維護性高的分散式控制架構(distributive control structure)，並以此系統實現主動式噪音控制。本研究重點分為兩個部分，第一部份為控制者區域網路系統的發展，這個部分包含點火訊號電路的設計與實際車輛網路的實現。第二部分是運用控制器區域網路實現之主動式噪音控制(active noise control, ANC)系統，在這個部分當中將主動式噪音控制建構於控制器區域網路平台上，並且使用三種不同適應性控制法則來實現引擎排氣系統之主動式噪音控制以消除引擎排氣系統之週期性噪音。控制器區域網路技術結合適應性控制演算法，此演算法是利用有限脈衝響應濾波器來實現，並以數位訊號處理器(digital signal processor, DSP)來實現即時控制。

This report describes the design of a vehicular controller area network (CAN) bus system with an application in active noise control for engine exhaust system. The work includes two parts: the first part is design with implementation of a CAN bus platform system; the second is an application of active noise control (ANC) in an engine exhaust system that is setting on the proposed CAN bus platform. The proposed ANC is based on the adaptive control algorithm with engine revolution reference. Most of the conventional methods for ANC are based primarily on an adaptive filter with the least-mean-square (LMS) error algorithm. Unfortunately, convergence speed is often limited when a sound source or a filtering plant is varied, because the learning process of the adaptive algorithm fails to respond quickly to the changing operational conditions. In this study, a variable step-size affine-projection algorithm (VSS-APA) is proposed. The proposed VSS-APA filtering algorithm is a combination of the variable step-size convergence algorithm and affine-projection algorithm (APA). The controller is implemented on the proposed CAN bus system. Experiments are carried out to evaluate the noise attenuation performance in various engine speeds. The experimental results indicated that the ANC system achieved the noise attenuation in an engine exhaust system by using the proposed CAN bus system.

TABLE OF CONTENTS
Page
COVER
CREDENTIAL
AUTHORIZATION LETTERS……………………………………..iii
ABSTRACT (CHINESE)………………………………….…………v
ABSTRACT (ENGLISH)………………………………...…...……..vi
TABLE OF CONTENTS…………………………………………viii
LIST OF FIGURES…………………………………………..………x
LIST OF TABLES………………………….………………………xii
GLOSSARY……………………………………………….………xiii
CHAPTER 1
INTRODUCTION
1.1 INTRODUCTION OF THIS WORK………………...…………1
1.2 LITERATURE REVIEW……………………………..…………4
1.3 OVERVIEW OF THIS THESIS…………………...……………8
CHAPTER 2
DESIGN AND IMPLEMENTATION OF CAN BUS
2.1 EMBED HARDWARE STRUCTURE…………………..…..…9
2.2 EMBED SYSTEM SOFTWARE STRUCTURE……………13
2.3 APPLICATION SYSTEM OF EXPERIMENTAL
PLATFORM……………………………………………….…16
CHAPTER 3
ADAPTIVE CONTROL ALGORITHM
3.1 FILTERED-X LEAST MEAN SQUARES CONTROL
ALGORITHM…………………………..……………...…17
3.2 NEW VARIABLE STEP-SIZE LEAST MEAN SQUARES
ALGORITHM…………………………………………….19
3.3 VARIABLE STEP-SIZE AFFINE-PROJECTION
ALGORITHM…………………………………………….21
CHAPTER 4
EXPERIMENTAL INVESTIGATION
4.1 IMPLEMENTATION OF CAN BUS SYSTEM………..…30
4.2 EXHAUST SYSTEM OF INTERNAL COMBUSTION
ENGINE…………………………………………….…….36
CHAPTER 5
CONCLUSIONS………………………...………………………44
REFERENCES………………………………………………….48

REFERENCES
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