Control Surface Derivatives in vspaero

[Chris Richardson]

Is there a way to integrate control surface definitions in VSP with vspaero? I would like to use vspaero to get all the stability derivatives for use in controls analysis of the aircraft, but in order to do so I would also need the control surface deflection derivatives along with the alpha, beta, and pqr derivatives that I can already get. Is there a way to do this?

Thanks

~ Chris Richardson

[Rob McDonald]

Not right now.

Dave Kinney has developed an updated version of VSPAERO that supports
control surfaces directly. We're in the process of beta testing that
-- as well as working on updated integration to OpenVSP.

I hope all this will be rolled out by the August Workshop.

Rob

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[Chris Richardson]

Ok, that would be a great addition to the tool for anyone wishing to do controls analysis. Also, I don't know if you guys have considered this, but it would also be nice to be able to run vspaero not just at one flight condition, but at multiple flight conditions in order to create an entire aero database of stability derivatives. I know you can do that pretty easy with a matlab script right now, but having it integrated into VSP would be nice.

[Rob McDonald]

That is all in the plans.

I expect alpha/beta/Mach sweeps to be integrated to the GUI before the
controls capability is ready. Combining sweeps and controls may take
a little while longer yet.

There should be some nice updates on the general roadmap presented at
the workshop.

Rob



On Mon, Jun 27, 2016 at 9:59 AM, Chris Richardson

[Bob Pasque]

Are control surfaces and flap/slats already built into the geometry part? I remember seeing some stuff in the OpenVSP workshops about it, but I don't think I've been able to find it yet in the program.
That being said, I haven't delved that deep into it yet :P.

[Rob McDonald]

We're using 'SubSurfaces' to model control surfaces. If you have a
Wing, click the 'Sub' tab, use the pull-down to change the type to
Control_Surf and click Add.

The released version of VSPAERO doesn't support control surface
calculations, but we're working on an update that will. Hopefully
soon...

Rob

[Kathryn Kwiecinski]

I want to use openVSP with vspaero to obtain control surface derivatives.  I am using openVSP 3.11, is there an update which lets me do this yet?  I saw that this post hasn't been touched in about a year.  What is status?

[Rob McDonald]

Yes, recent versions of OpenVSP should do this. Just model the
control surfaces, tell VSPAERO about them, and run a 'stab' run, it
will calculate the derivatives.

If I get time today, I will release 3.13.1 -- it includes some bug
fixes that you'll want to have before getting serious about this.

Rob

[Kate Kwiecinski]

Thanks so much! 

Kate Kwiecinski

kwie...@umn.edu

(414) 731-7764

Undergraduate Research Assistant - University of Minnesota

Volunteer Coordinator and Webmaster - American Institute of Aeronautics and Astronautics

Mentorship Committee Member - Society of Women Engineers

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