Subsystem Build & Test
Table of Contents
Team Vision for Subsystem Level Build & Test PhaseSummarize:
- We planned to assemble ordered parts and begin preliminary testing of the control system. Also finalize the BOM for the latch and order those parts as well.
- We began assembly of the control system and found an issue with the relays we ordered. Corrective action is already in place. BOM was finalized for the latch and order was submitted to Dr. Connelly.
Test Results SummaryDuring testing of the system, an issue was discovered with the integration circuit relays. The relays which we ordered turned out to be AC Load relays. The circuit we designed utilizes DC Loads which are not compatible with the relays we have. DC Load solid state relays were found and are soon to be acquired. Preliminary testing can still be done using the PCB mount SPST relays from prototyping.
The DAQ we acquired reads the encoder as expected. Coding still needs to be done to process the data as it is acquired.
We discovered that the DAQ has a 3.3V DI/O high voltage instead of an expected 5V due to a misinterpretation of the documentation. The Solid State relays handle the 3.3V load well and appear to flip properly although the PCB mount relays from prototyping do not handle this load well. For initial testing until the replacement relays arrive, a slightly different circuit will be used from the final design.
Inputs & Source
Click here to view details on all existing test plans.
Outputs & Destination
Additional Test Results:
Latch Hinge Environmental Testing
- The above images show the "before" conditions of the four different hinges (from left to right: Stainless Steel, Galvanized Steel, Brass Finish, Zinc Plated).
- Current results from the testing show that the appearance and maneuverability of each hinge was not affected by the cold and snowy weather present over the past few weeks, indicating that all of these metals could be acceptable with respect to environmental effects.
- Testing will continue in case an observation opportunity arises on a significantly cold day (i.e. below 20° if possible).
The above images represent the control box build progress.
The following links contain initial revisions of the Latch Torque Arm engineering drawings to be used for fabrication when necessary. Updates will be made when time permits and/or the necessity arises.
Latch Control Box
Latch Mechanism Power Distribution
Latch Mechanism and Shutter Controls
Risk and Problem Tracking
Risk Management Document: Risks
Plans for Next Phase
Ahmed Alhurubi's Three Week Plan: Ahmed's Goals
Joe Brescia's Three Week Plan: Joe's Goals
Raymond Castro's Three Week Plan: Ray's Goals
Wilson Quizhpi's Three Week Plan: Wilson's Goals
Sarah Williams's Three Week Plan: Sarah's Goals