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  1. Data Management
  2. DM-35019

Support the Rotator Test on Summit Part 6

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    Details

    • Story Points:
      2
    • Epic Link:
    • Sprint:
      TSSW Sprint - Jun 6 - Jun 20, TSSW Sprint - Jun 20 - Jul 04
    • Team:
      Telescope and Site
    • Urgent?:
      No

      Description

      Support the rotator test on summit. This is to collect the data of controller parameters.

      Check there is the “forced oscillation” in the rotator or not. If it is, the oscillation frequency will change with speed. Therefore, measure the oscillation frequency at each speed and check if it is related to something, for example:

      1. Rotation speed of the motor, of the pinion or of the crown
      2. Rotation speed of the pinion or crown multiplied by their number of teeth…

      If it is, we should review mechanically the source of the oscillation because the controller is simply reacting to that oscillation (trying to eliminate it).

        Attachments

        1. analysis_fail
          802 kB
        2. moog_big.png
          moog_big.png
          124 kB
        3. moog_small.png
          moog_small.png
          120 kB
        4. test_record.txt
          4 kB

          Issue Links

          is triggered by

          Story - Created by Jira Software - do not edit or delete. Issue type for a user story. DM-34873 Support the Rotator Test on Summit Part 5

          • Done
          is triggering

          Story - Created by Jira Software - do not edit or delete. Issue type for a user story. DM-35251 Analyze the Rotator Test Data Part 3

          • Done

          Story - Created by Jira Software - do not edit or delete. Issue type for a user story. DM-35339 Support the Rotator Test on Summit Part 7

          • Done

            Activity

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            Hide
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            ttsai Te-Wei Tsai added a comment - - edited

            I noticed that I have the data of MOOG's tracking result at 3/28:

            time_start = Time("2022-03-28T17:27:05", scale="utc", format="isot")
            		 
            time_end = Time("2022-03-28T17:27:30", scale="utc", format="isot")

            The result is:

            Check the checking target from 0.7 degree to 1.5 degree with the velocity of 0.068 degree/second:

            The maximum of position error is 13.388 arcsec and the RMS is 3.783 arcsec.

            Under the same condition, the Tekniker controller can reach the results that the maximum of position error is 0.787 arcsec and the RMS is 0.258 arcsec already.

            Show
            ttsai Te-Wei Tsai added a comment - - edited I noticed that I have the data of MOOG's tracking result at 3/28: time_start = Time( "2022-03-28T17:27:05" , scale = "utc" , format = "isot" ) time_end = Time( "2022-03-28T17:27:30" , scale = "utc" , format = "isot" ) The result is: Check the checking target from 0.7 degree to 1.5 degree with the velocity of 0.068 degree/second: The maximum of position error is 13.388 arcsec and the RMS is 3.783 arcsec. Under the same condition, the Tekniker controller can reach the results that the maximum of position error is 0.787 arcsec and the RMS is 0.258 arcsec already.
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            ttsai Te-Wei Tsai added a comment -

            The test had been postponed to the next Thursday (6/23).

            Show
            ttsai Te-Wei Tsai added a comment - The test had been postponed to the next Thursday (6/23).
            Hide
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            ttsai Te-Wei Tsai added a comment - - edited

            Need to analyze the data: analysis_fail

            This is the binary file that I recorded the condition that the rotator can not do the tracking at the second time of test.

            Show
            ttsai Te-Wei Tsai added a comment - - edited Need to analyze the data:  analysis_fail This is the binary file that I recorded the condition that the rotator can not do the tracking at the second time of test.
            Hide
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            ttsai Te-Wei Tsai added a comment -

            Test records: test_record.txt

            Show
            ttsai Te-Wei Tsai added a comment - Test records: test_record.txt
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            ttsai Te-Wei Tsai added a comment -

            Please review the PR:
            https://github.com/lsst-ts/ts_notebooks/pull/89

            Thanks!

            Show
            ttsai Te-Wei Tsai added a comment - Please review the PR: https://github.com/lsst-ts/ts_notebooks/pull/89 Thanks!
            Hide
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            hdrass Holger Drass added a comment -

            Thanks, Te-Wei! Great work in the very cold!

            Show
            hdrass Holger Drass added a comment - Thanks, Te-Wei! Great work in the very cold!

              People

              Assignee:
              ttsai Te-Wei Tsai
              Reporter:
              ttsai Te-Wei Tsai
              Reviewers:
              Holger Drass
              Watchers:
              Holger Drass, Te-Wei Tsai
              Votes:
              0 Vote for this issue
              Watchers:
              2 Start watching this issue

                Dates

                Created:
                Updated:
                Resolved:

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