Inverted spring pendulum & control torque

AI Thread Summary
The discussion revolves around the feasibility of applying torque to an inverted spring pendulum system. Participants clarify that while springs primarily transmit axial forces, they can also exhibit torsional elasticity, which may allow for torque application. The importance of defining the restoring force and equilibrium position in the model is emphasized, as these are crucial for the pendulum's functionality. Questions arise regarding the specific meaning of "control torque" and its implications for the system. Overall, the conversation highlights the complexities of spring mechanics in relation to control systems.
nzur
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Hey folks,

please see an attached figure.


I am just wondering if I can give a torque to the system (B).

A spring transmit only axial forces between two points.. so I am very confused on it.

If I assumed that the spring is compliant only in axial direction, can I give a control torque to spring pendulum ?

...

Any comment and feedback will be very appreciated. thanks
 

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Hello nzur,
I fear I don´t quite understand you and your drawing.

Most real springs will transmit torque, and they will have also have torsional elasticity (apart from the longitudinal elasticity). You´re free to define ideal springs with any kind of properties you want, but it might not be relevant for practical purposes.

Where does the restoring force in Model A come from and where is the equilibrium position? (Without a restoring force it is not a pendulum)
What exactly do you mean by control torque?

maimonides
 
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