Thermo-Cooler Controller Kiefer, Mary, Molly, Sam

Update We played with the lead-lag transfer function while researching until we ▫Confirmed that lead compensation does not better the control for this particular system ▫The decision, therefore, is lead-lag is not worth implementing Met with Avi to verify our system design and our progress with the controller ▫Verified that we are on track ▫Clarified our system design ▫He gave suggestions to make optimizing easier and for cleaning up temp circuit

Update (cont.) Cleaned up the temperature circuit ▫Set the negative input of the op-amp to 6V instead of ground so that we get a positive voltage output  One op-amp instead of two Analyzed the system response of our TEC to see if we can make use out of a first-order approximation ▫Makes it easier on us to optimize  the number of parameters we must tweak goes down to 1 Finalized our final system design w/ schematic

Current Assignments Building the difference amplifier Building the driver ▫A matter of interfacing the output of the compensator to a transistor that then powers TEC ▫Minor loop control is something we really want to do  feedback around the driver to make the transistor “perfect”  These means adding gain compensation around the transistor  Software-wise: makes it so we don’t have to take into account the transfer function of the driver *Goal: Have a working deliverable by Monday