Assume we have a conveyor scales. Which consists of scales, and motor with conveyor belt placed above, so that the boxes can be measured (weight) while moving above. What I want is to create the model of the oscillations of that scale. The equation of the oscillations of the spring is well known for everybody. How to include the influence of the motor, conveyor and other important effects to the system? Is there any papers (articles) about this thema? I think that the influence of the motor in simle case can be modelled as the force: $F(t) = A sin(\Omega t)$ Where $A$ is a constant and $\Omega$ is the parameter which depends on the motor (frequency), which is also constant (depending on the speed of the motor). How to add the ocsillations created by conveyor belt and may be some other oscillations such as box moving above can create additional vibrations?
EDIT 1: I want to crate the model. I have created one for a scales, but without conveyor and motor. It seems that they do not match. The data of the model and the real data of the conveyor with scales. So there sems to be a big influence of a motor, conveyor belt etc. And what I want is to identify what has a big influence and include it inside the system. So that my model will match the real system. I don't care of some influences which do not make big difference. It is difficult to identify what makes a big influence. And It is more difficult to model for example the moving of the conveyor with or without a box above. How to do it?
