ELEC 4123: Design Proficiency Session 1, Week 9: Interactive Lecture on Topic 3 + Intro to Elective Design Topics Prof.

Transcription

1 ELEC 4123: Design Proficiency Session 1, 2018 Week 9: Interactive Lecture on Topic 3 + Intro to Elective Design Topics Prof. David Taubman

2 Topic 3 information matters There will again be an open lab this Tuesday 5pm to 9pm in EE-214 7pm to 9pm in EE-G14 Will post a Moodle announcement later tonight As always, you cannot be marked in open labs Control Rig will be available collect from EE-214 return to EE-214 before going home The rig will not be available at other times but you can design around this Matlab 2016 version will be in all the labs solves issue in EE214 with continuous audio sample

3 Task 1 obstacles and issues Progress check Clarification and discussion as required

4 Task 2 issues addressed What is hard about this task? Making the sensing method immune to interference Configuring the sensing circuit to avoid saturation

5 Task 3 issues addressed What is the idea? map non-linear sensor readings to linear position why should the sensor readings be non-linear?? Is there anything hard about this task? what rig properties have you observed so far? What are the dependencies for this task? fan control (manual is enough) sensor readings robustness to ambient light beware of saturation!

6 Task 4 issues addressed What is the idea? measure dynamic system response step input -> measurements Planning for success you want to get results in the lab to analyze at home collect lots of results: you can automate this What is hard about this task? continuous audio output and input suggest building on continuous_audio.m you can get joint input and output tested at home floater jitter, measurement noise, repeatability Dependencies if you need masking tape around the slot get it installed before taking measurements

7 Elective Design logistics Topic/team nomination form form in by Friday if you don t, I will pick a topic for you!!! Find a group of 4 if you can groups of more than 4 are not allowed do this and I will discard your form and pick a topic for you groups of 3 are not full groups I will add somebody or break your group apart Watch the web-site further details will be posted on the projects

8 Elective Design Power/Energy Project 1 Deliver as much power as possible across a transmission line power source is 5V DC injection limit is 50Vrms Key objectives power efficiency cumulative V-A rating of switching devices Fixed elements ferrite E-core and winding former Constraints signal generator or computer may not be part of your design everything must be powered from 5V you can only purchase your own switching transistors and diodes no integrated devices

9 Elective Design Power/Energy Project 2 Store and deliver energy to an emergency light maintain a required power output for as long as possible Energy is stored in ultracapacitors 25F, ~40mΩ ESR, Vmax ~2.5V Energy system communications lighting activated by infrared signal must be able to pass the signal along once required lighting power cannot be sustained daisy chaining Fixed elements capacitor, E-core and winding former Constraints you can only purchase your own switching transistors and diodes no integrated devices

10 Elective Design Networking Snoop-me packet server offers a snoop feature (vulnerability) allows access to some packets of a hidden message snoop requests must be infrequent too often, from the same IP, and you will be caught your group can use up to 3 IP addresses (machines) collaborate to discover the message as soon as possible the message cycles repeatedly (for some reason) the packet you get depends only on when you ask there is jitter there is a packet sequence number there is a special EOM (End of Message) packet Constraints (might be negotiable) Use BSD sockets and C/C++

11 Elective Design Physical Comms Shared channel, separate messages Physical channel supplied noisy and bandlimited communicate two separate messages ASAP Computer 1 transmitter Channel (specified Monday W10) receiver Computer 3 transmitter receiver Computer 2 Computer 4 Matlab-based algorithms of your choice No fancy built-in functions Standard electronic components 4 separate breadboards Connected only through 2 wire cable Lab power supplies Matlab-based algorithms of your choice No fancy built-in functions