I am simulating the projectile motion of an aerial vehicle with wing deployment in Simscape Multibody. The vehicle is given an initial velocity using the State Target in the 6-DOF joint. The 6-DOF joint is connected to the center of gravity (CG) of the vehicle at its initial position. During the projectile motion, the wings deploy, causing the CG location of the vehicle to change over time. I am measuring this displacement using an Inertia Sensor, and this part of the simulation works well.
My ultimate goal is to perform a co-simulation between Simscape and a CFD solver. I created a Standalone FMU from the Simscape model, which I provided to the CFD solver. In the CFD solver, I calculate the aerodynamic forces and moments based on the updated CG location at each time step and pass these values as inputs to the Simscape Multibody model (FMU).
Current Difficulty:
My current challenge lies in placing a joint at the moving center of mass (CG) in Simscape Multibody. In Simscape, when a 6-DOF joint is placed, the center of rotation is fixed at the joint connection point, which in my case is the initial CG location. However, I need the joint to follow the moving CG. If I can create a frame at the moving CG location, I could directly apply the aerodynamic forces from the CFD solver (using the 6-DOF joint) at that updated location.
I would greatly appreciate any suggestions or comments on how to place a frame (joint) at a moving center of mass (CG) in Simscape Multibody.
Thank you!.
