Bsee

ECE 402
EE DESIGN PROJECTS
Spring 2012

FINAL DESIGN REVIEW REPORT

Prototype Railway Locomotive Technology Demonstrator
by
Team

Contact: | Dan Fetter | dfetter@purdue.edu |
| Fehim Hatipoglu | fhatipog@purdue.edu |
| Berke Karakus | bkarakus@purdue.edu |
| Javier Giron | jgiron@purdue.edu |
| Minhoo Kim | kim99@purdue.edu |

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*Table of Contents
1. Introduction and System Specification 5
2. System Design 5
3. Subsystem Design 6
3.1. Cruise Control 6
3.2. Station Halt Control 7
3.3. Train Brain and Communications 10
3.4. Train Power 12
3.5. Train Energy Monitor 16
4. System Manual 18
5. Testing Plan 19
6. Schedule Of Deliverables 23
7. Known Costs 24

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Introduction and System Specification
The customer operates a network of low traffic rail links using GE EMD GP15-1 diesel locomotives. This project’s objective is to prototype a system that will reduce the network operating costs. The electronic package included in the demonstrator will utilize a control algorithm to enable semi-autonomous control of the locomotive, which consists of anoperator station communicating wirelessly with a scale model locomotive. It will also demonstrate power conversion technologies. The final product will demonstrate the following features:
1. Cruise control, a control algorithm software that drives the locomotive at a set speed.
2. Speed logging and real-time display of the current speed compared to the desired speed.
3. Automated haltsystem, which will bring the locomotive to a halt at the desired station when enabled.
4. Power conversion to use the power from rails as well as their existing on-board diesel generator.
5. A feature that alerts the operator at communication loss, and brings the locomotive to a controlled halt.
6. Train energy monitor that displays energy consumed by the whole train or the DC motor.System Design

Figure 2.1. System Demonstrator Block diagram
The operator station, consisting of a PC and associated electronics, has to fit on the 3’x4’ trolley. The train, the video camera, the transmitter and receiver stations are only allowed on the track. Shown in Figure 2.1., the system is divided into an operator station, and a train system. Cruise control, station halt control, andstation part of the train brain system form the operator station. Train power, train energy monitor, and train part of the train brain system are carried on rail cars behind the locomotive. The system is to cost less than $50.00, excluding the costs of cables and customer-supplied items. $10.00 for AC adapters is included in the cost.

Subsystem Design
Cruise Control
The Cruise control consistsof five analog circuit designs for the inputs and outputs of the system, a MATLAB-based software programming for the PID controller, and a GUI for the USER control.
1.1.1. Interaction with the Rest of the System
There are three interactions with the rest of the Train system. It interfaces with the Train Brain by gathering in real time generated data speed. This would be the actualspeed of the train that, with the cruise control model, will have to match the desire speed of the user’s input at the GUI.
The next interaction, also at the brain, would be to output from the ARM Microcontroller an encoded PWN signal by throttle control. This will require a speed control circuit.
The last interaction with this system is the Halt Station Control. This works by receiving a High/Lowsignal where it will detect when does the user wants to halt, ignoring the input speed from the interface.
1.1.2. Subsystems
The Cruise Control system is made up of different subsystems. It is in charge of creating a PWM signal for the train brain, gathering speed information from the train brain, and multiplexing the signal to send the train brain (either from the cruise control or...