# active flow control **URL:** \ **Category:** Rotor Aerodynamics\ **Created:** [January 26, 2006, 5:29pm UTC](https://forums.nlr.gov/t/active-flow-control/73 "2006-01-26T17:29:29Z")\ **Posts on this page:** 1\ **Showing post:** 5
**Author:** ![Jason.Jonkman](https://dub1.discourse-cdn.com/nrel/user_avatar/forums.nlr.gov/jason.jonkman/32/3086_2.png) [@Jason.Jonkman](https://forums.nlr.gov/u/Jason.Jonkman)\ **Post date:** [May 22, 2017, 10:13pm UTC](https://forums.nlr.gov/t/active-flow-control/73/5 "2017-05-22T22:13:57Z")
Dear Hernan, The ability to specify MulTabLoc within Simulink is not a standard feature of the FAST v8 interface to MATLAB/Simulink. You will have to customize the FAST source code to achieve this. The following forum topics may help a bit: > [@Variable airfoils using the MulTabLoc USER function](http://forums.nlr.gov/t/variable-airfoils-using-the-multabloc-user-function/1006/12): > > Wth the modifications you have done, you should not have to recompile the FAST\_SFunc.mexw32 or FAST\_SFunc.mexw64 files. What you do need to recompile is the FAST\_Library\_Win32.dll or FAST\_Library\_x64.dll file. If you have compiled the FAST\_Library dll and are still getting the error with the OpenLoop example, you need to isolate the problem: is it coming from the Simulink model or from your changes to the FAST source code? Have you changed the OpenLoop example at all? If NumAdditionalInputs = … > [@Movable trailing edge flaps implementation](http://forums.nlr.gov/t/movable-trailing-edge-flaps-implementation/858/5): > > Dear Srinivasa, Depending on the configuration of the actuators you are talking about, the actuator may or may not impact the structural properties (e.g., trailing-edge microtabs probably won’t impact the structural properties, but deformable trailing edges might). If it is reasonable to assume that the actuator will affect the airfoil data and not the structural properties, it may be reasonable to use AeroDyn’s MulTabLoc option (with suitable modification) to model the actuators. The MulTabL… Best regards, --- _[View the full topic](https://forums.nlr.gov/t/active-flow-control/73)._