3.0 | 8 ratings Rate this file 119 downloads (last 30 days) File Size: 571 KB File ID: #1815

HL-20 Lifting Body

10 Jun 2002 (Updated 11 Jun 2002)

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

File Information
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)
Zip File Content
Other Files	aeroblk_HL20pic.jpg, hl20airframe.mdl, init_hl20.m, tm4302.pdf

Tags for This File
Everyone's Tags	aerodef, aeronautical, aeronautics, aerospace, airframe, astronautical(2), hl20, nasa
Tags I've Applied
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Comments and Ratings (9)
13 Aug 2003	klaus well	This is pretty useless since no submodels like EOM's, Disturbances, etc. are included
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.
03 Oct 2003	Farrokh Rashkan
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.
14 Jun 2006	oswald jean
11 Jul 2006	Scott Josselyn	Looks pretty but does not work. Missing dependent blocksets.
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.)
30 Jul 2008	sonal gandhi
29 Aug 2008	Vagner Pralon

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Tag Activity for this File
Tag	Applied By	Date/Time
aerospace	Stacey Gage	22 Oct 2008 06:45:14
aeronautics	Stacey Gage	22 Oct 2008 06:45:14
aerodef	Stacey Gage	22 Oct 2008 06:45:14
hl20	Stacey Gage	22 Oct 2008 06:45:14
astronautical	Stacey Gage	22 Oct 2008 06:45:14
airframe	Stacey Gage	22 Oct 2008 06:45:14
aeronautical	Stacey Gage	22 Oct 2008 06:45:14
nasa	Stacey Gage	22 Oct 2008 06:45:14
astronautical	Dmitriy	20 Dec 2008 07:43:02

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