Tuesday, November 25, 2008

Wrote the procedure for gain tuning the inertial referencing circuit.

Calibrated the LVDT for the 10" hydraulic shaker.

Tried to get some shock data from jeff to send to Loral. Couldn't figure out which files to send. I called jeff to ask but he didn't answer

Sent KD-2300 back to Kaman because they didn't fix it the first time.

Friday, November 21, 2008

Company meeting was today.

Tested more WISE isolators.

Helped Scott P. set up a DCS test to test a damper he is going to be using.

Thursday, November 20, 2008

Tested the life unit for World View. We were out of LN so I had to run to Madco to get a small 35L Liquid Nitrogen tank. The results of the test were a little different than the previous test done in August. At higher frequencies, the loss factor dropped lower. Scott P. talked to Connor and Paul about this and they suggested realigning and making sure the setup was exactly the same as last time. They also suggested testing an undamped specimen and comparing to before.
I checked the pictures of the setup from last time and discovered that there was a washer that I was using that wasn't there before. I redid the setup and retested the isolator. The results came out exactly the same.

I also tested about 5 more WISE isolators. I am now lubing the bolts with Braycote and changing them every other isolator.

Tuesday, November 18, 2008

Finished up presentation for Fast GVT progress report.

Retested WISE isolators that had come in slightly under spec. The first one, SN018, retested fine. Upon mounting the second one, SN036, one of the bolts galled which pretty much ruined the isolator. This probably happened because either (1) there was too much junk on the bolt from using it so much (2) the anodized coating wore off because it was used so much, or (3) last time it was mounted the thread was compromised somehow. This is being resolved. It looks like from now on though we will be using a lubricant when fastening the isolators in.

I setup the RR test back on the work plate to do one more room temperature test.

I setup the World View test rig so that I can do the life unit test in the next few days.

Monday, November 17, 2008

Started preparing for the Life Test on the World View Life Unit isolator. Since one of the kaman probe boxes was damaged that was used for WV, I had to get another set and verify that they give nominally the same results. I did and they agree to within about 1 percent.

I tore down the rejection ratio test rig that was in the Espec chamber.

I started preparing slides for the progress report on Wednesday. Brad wants them done by tomorrow early afternoon.

Thursday, November 13, 2008

DCS tested the WISE isolators most of the day.

Discussed RR with Brad and Paul. They suggested gain tuning a little differently to try and get it more accurate. They suggested turning the variable resister in 1/8th of a turn increments and taking an FFT of the differenced velocity when the input to the system was a 40Hz sine wave. Which ever position had the lowest value at 40Hz would be the best gain matched position. I did this and the resulting room temp rejection ratio when gain tuned like this was a bit better than before. Now Brad and Paul want me to retake the 100F and 32F RR measurements.

Wednesday, November 12, 2008

Went to dentist in the morning. Got to work around 9:10 and went directly into a product demonstration. Several representatives from FARO were here to show us three of their laser positioning systems. They were pretty impressive, they had a scanner which could scan an entire environment 360 degrees, a laser tracker that could map out large objects, and a laser arm which was both a probe and a laser scanner, for accurately scanning small to mid size objects.

Tested WISE, got through 5 more isolators.

Showed the diff temp RR test results to Brad, he wanted slighlty better performance at the 120F level. He had me do another test at 100F. They were better but still not quite under -30dB at .5Hz.