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HL-20 Lifting Body

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3.0 | 8 ratings Rate this file 34 Downloads (last 30 days) File Size: 571 KB File ID: #1815
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HL-20 Lifting Body

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10 Jun 2002 (Updated )

NASA HL-20 Lifting Body Airframe Modeled with Simulink and Aerospace Blockset.

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Description

This model uses Simulink and the Aerospace Blockset for modeling the airframe of a NASA HL-20 lifting body, which is a low-cost complement to the Space Shuttle orbiter. The Aerospace Blockset was used to rapidly assemble portions of the HL-20 airframe. The remaining portions, including the calculation of aerodynamic coefficients, were modeled with Simulink.

Required Products Aerospace Blockset
Control System Toolbox
Simulink
MATLAB release MATLAB 6.1 (R12.1)
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Comments and Ratings (9)
29 Aug 2008 Vagner Pralon  
30 Jul 2008 sonal gandhi  
25 Sep 2006 Stacey Gage

Neil comments about CP vs CG are correct, but for general cases, air vehicles CP and CG are close enough that the difference is negligible. (see aerospace dynamic text book calculations.)

11 Jul 2006 Scott Josselyn

Looks pretty but does not work. Missing dependent blocksets.

14 Jun 2006 oswald jean  
01 May 2006 Neil Boertlein

This model has an error: angle of attack, sideslip and airspeed should be based on the velocity vector of the aerodynamic reference point, not the CG. Otherwise, the rate dependent terms are incorrect. As an illustration, consider a throwing dart with the aero reference point back in the tail. Even if damping coefficients about the reference point are negligible, damping of pitch and yaw rotation about the CG is large because the rotational rate impacts the incidence and airspeed of the tail.

03 Oct 2003 Farrokh Rashkan  
30 Sep 2003 Michael Sarabia

Save lifting body data, it's future is yet to come. It is compact (fits over a booster) and has low side loads in the boost phase.
Fifty years old, alluring and looking good.
Dr. Eggers and Syvertson had a good idea.

13 Aug 2003 klaus well

This is pretty useless since no submodels like EOM's, Disturbances, etc. are included

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