8.Carlson - Improving the Accuracy of Target Engagement...

Info icon This preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Presented by Lane Carlson1 M. Tillack1, T. Lorentz1, N. Alexander2, D. Goodin2, R. Petzoldt2 ( 1 UCSD,  2 General Atomics) HAPL Project Review Santa Fe, NM April 8-9, 2008 Improving the Accuracy of  Target Engagement
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Hit-on-the-fly experiment has demonstrated  improved  engagement on moving targets 1) Improvements in imaging and relaying the glint return signal to the  PSD give a more repeatable & dependable signal. 1) Improvements have yielded better engagement:  HAPL Oct 2007 - 150  µ m (1 σ ) for targets in  ±  1.5 mm range. 80  µ m  (1 σ ) engagement for targets in  ±  1.5 mm range. Final Requirement: 20  µ m engagement accuracy in (x,y,z) at ~20 m (10 -6 )
Image of page 2
Surface issues have been resolved with glint  return imaging improvements Last time, concerned about surface roughness and laser beam profile. However, imaging system was looking at an intermediate, incoherent field. With simplified setup, found proper focusing techniques that allow more precise  imaging of the glint’s true apparent source. Improper focusing Proper focusing Surface finish issues are  resolved with proper  focusing and aperture.
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Glint return provides a final reference point pulsed glint laser (1064 nm) coincidence sensor/PSD f 2m focusing mirror wedged dichroic mirror aperture pellicle beam splitter
Image of page 4
Systematic identification and reduction of errors  yields improved target engagement Error sources as of Oct 2007: Relaying glint return.……...50  µ m PSD accuracy limit………..50  µ m (spec) Target motion from  glint to driver……………..24  µ m (1 σ ) PSD non-linearity…………..40  µ m (1 σ ) Verification camera………~7  µ m Mirror pointing…………..…~6  µ m Simplified setup helped identify four areas of improvement related to  relaying glint return: 1. Proper focusing of the glint return on the PSD.
Image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern