| 2 | |
| 3 | Purpose: Measure degradation of mirror array and what are the leading causes of it: Temperature, Motion, Wind, etc. |
| 4 | |
| 5 | When to do: Currently, during cloudy nights but no threatening weather. This may change in the future as needed/requested. |
| 6 | |
| 7 | Testing Modes: Static or Dynamic: |
| 8 | • Static: No motion at all. The structure and tracker stay in the same position during entire test. |
| 9 | • Dynamic: Commanded motion at some point. Either with a structure move or tracker motion or some combination. |
| 10 | |
| 11 | Instructions: |
| 12 | • '''Record times at all steps. At the start and end of the test record all temps, louver state and wind speed and direction. You will be emailing a timeline to Hanshin when done. An example is below.''' |
| 13 | |
| 14 | 1. Stack like normal and save reference and SCS ttp files. You can drop the HEFI measurements. Mark as ‘engineering’. |
| 15 | |
| 16 | 2. In SCS, switch Move Authority to ‘None.’ Leave SAMS in closed loop (Operate mode). |
| 17 | |
| 18 | 3. In Wavescope console, enter ‘Degrade X’ where X is the number of minutes you’d like to run the test, between 10-30 minutes total. So, for a 10 minute test, you’d type ‘Degrade 10’. For an 18 minute test, ‘Degrade 18’ . Run for however much you think you can get in. |
| 19 | |
| 20 | • If you’re doing a dynamic test, do not move until the test is done as it will create false measurements, if not crash the test. |
| 21 | For example: For a test taking a total of 20 minutes, run ‘Degrade 10’, move, return to CCAS and realign, run ‘Degrade 10’ again. |
| 22 | '''Record the time of when you command the motion and where you moved to.''' |
| 23 | |
| 24 | 4. When the test finishes, return SCS to SAMS authority and let the SAMS measurements go through then do a ‘tighten-up’ stack. Mark as engineering as well and save reference and SCS ttp files. You can take HEFI measurements if time allows. '''Restart the wavescope software before stacking again to reset values.''' |
| 25 | |
| 26 | If you’re clouded out all night, taking multiple tests in different conditions/motions/temps/wind speeds would be great. |
| 27 | |
| 28 | Email the timeline of steps and whatever motions made with the subject line “SAMS Stability Test (static or dynamic) taken ([date])” to Hanshin and cc Steven J and Cassie. Email example below. |
| 29 | |
| 30 | Any questions, call Cassie: Home-403, Cell-828-755-7590 |