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澳洲墨尔本assignmentHD代写范例展示:MotorProductionProposal

澳洲墨尔本assignmentHD代写范例展示:MotorProductionProposal
  • 国家 : 澳洲
  • 级别 : 硕士
  • 专业 :
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详细描述

Design Proposal for a Can-based Instrument Cluster for Automobiles

Background

The instrument cluster is a critical yet difficult component in an automobile as the most important information display window. In recent years, with more and more electronic devices being integrated into an automobile, there is a dramatic increase in the volume of data the instrument cluster needs to interact with the other parts of the car. As a result, the instrument cluster is required to be better integrated with the other parts of the whole car and more reliable. On the other hand, Controller Area Network (CAN), as a real-time and distributed serial data communication network, is becoming more and more popular in auto industry. CAN was first introduced to automobile industry by BOSCH in the 1980s and became international standard (i.e., ISO 11891-1) in 1993. Because of its high reliability and performance, it has become the most adopted communication method within a car. In the following, we describe a design proposal for a CAN-based instrument cluster as a modification (or upgrade) of the existing traditional ad-hocarchitecture.

Statement of Work

In this design proposal, we describe the design and development plan for a full-feature digital intelligent automotive instrument cluster product which is a modification of existing dashboard system. This new product is based on CAN bus communication technology, TFT-LCD display technology, and embedded control technology. In addition, the general infrastructure and implementation scheme of this new product is also illustrated, with possible problems being identified.

Development Plan

Figure 1 below shows the overall infrastructure of this new CAN-based instrument cluster. In our design, we have integrated the instrument cluster with the CAN communication bus, TFT-LCD, ARM processor and RTOS operating system. Some detail of this design includes:

-Data transmission and receiving is manipulated by the CAN communication bus controlling modular. This modular implements the standard CAN data communication protocol and acts as an intelligent node plugged into the CAN bus within the car.

-This product is based on the ARM7 micro-processor (e.g., LPC2478) core data processing unit. The functionality of this component is: 1) To manipulate the sending and receiving of data as the central controller; 2) To process all the data received, for example, to undertake the format conversion of data sent and received for different kinds of data like car speed, engine temperature; 3) To control the information display in the TFT-LCD display.

 

-Data coming from different components would be buffered in external storage, which can be fetched by LCD displayer at any time.

 

 

-RTOS is the software development platform that builds on the underlying hardware infrastructure. This layer of abstraction can help hide the complexity and difference of underlying hardware and make the software development work easier.

 

 

Sensors

Vehicle CAN

CANL    CANH

CAN communication modular

Transmitter/
Receiver

CAN Controller

LCD display modular

LCD controller

TFT-LCD displayer

ARM7 Processor

&

RTOS

uC/OS-II

External storage

 

Figure 1 Overall infrastructure of the CAN-based full-feature instrument cluster

 

To implement the product proposed in this proposal, Figure 2 illustrate the sample development plan that we have in mind. The development process follows the traditional water-fall procedure. That is, the development process starts from the system level and component level design before moving on to the implementation of compromised components (e.g., CAN communication modular, LCD display modular). The product integration and test come in the last phase. Meanwhile, technical and customer documentation is generated in parallel with the integration and testing phase.

 

              Duration
Task

1 Month

1 Month

1 Month

1 Month

1 Month

1 Month

Generate detail design

 

 

 

 

 

 

CAN communication modular

 

 

 

 

 

 

LCD display modular

 

 

 

 

 

 

External storage

 

 

 

 

 

 

Product integration

 

 

 

 

 

 

Integration test

 

 

 

 

 

 

Documentation

 

 

 

 

 

 

 

Figure 2 Proposed development process and schedule

Possible Problems

Possible problems for this new product may come from several different sources including:

-Hardware

Signal interference from other electronic devices within the car might be a major issue for this CAN-based intelligent instrument cluster. There are a lot of electronic noises emitted from other components that may bring negative impact to the instrument cluster. Signal interference from different data transmission lines can lead to errerous  results. In addition, this product is working in hazard environment (e.g., temperature ranging from -45C to 100C). All these factors can be a challenge to the design and implantation of this product.

 

-Software

Defects or bugs introduced in the software running in this CAN-based instrument cluster may be another problem. According to software engineering theory and practice, defects cannot be avoided totally in software product, and the same is true for the software developed for this instrument cluster. As a result, the software quality should be rigorously checked and the fault-tolerant should be considered at the very beginning of the design phase.

 

 

Reference

C.L. Wei, J.D. Cullen, A.I.AI-Shama’a. (1999). Real-time CAN network system for monitoring the vibration of vehicle engines. Control Engineering Practice, Vol. 7, 1999, pp. 1515-1523

 

Lee, K. C. Kim, M. H. Lee, S. Lee, H. H. (2004). IEEE-1451-Based Smart Module for In-Vehicle Networking Systems of Intelligent Vehicles. IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS. IEEE INSTITUTE OF ELECTRICAL AND ELECTRONICS. 2004, VOL 51; PART 6, pages 1150-1158.

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