I have the situation from the following drawing:
It represents a model for measuring the torque of a generator. There is an arm connected to stator and, the other end of the arm to a bending type load cell. I want to model this system and have as an input the torque of the generator rotor and as output the torque that reaches the load cell. I want to model somehow how is the transfer of energy from the rotor to the load cell. The load cell type is Hottinger Z6FC3. The system is connected like in the figure below.
I am new at this and don't know much mechanics. I don't know how to write the motion equations for the two bodies and connect them.