Effect of a spring on equations of motion

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SUMMARY

The discussion focuses on the impact of a torsional spring with constant K on the equations of motion for an inverted pendulum system. It concludes that the spring affects the moment equation by introducing an additional term K(theta), which represents the torque exerted by the spring. The spring's attachment to both the cart and the rod is crucial, as it influences the forces acting on both components. Understanding these dynamics is essential for accurate modeling of the system's behavior.

PREREQUISITES
  • Understanding of torsional springs and their properties
  • Familiarity with equations of motion in mechanical systems
  • Knowledge of force analysis in dynamic systems
  • Basic principles of pendulum mechanics
NEXT STEPS
  • Study the effects of torsional springs on dynamic systems
  • Learn about the derivation of equations of motion for pendulum systems
  • Explore the concept of torque and its applications in mechanical systems
  • Investigate the role of reaction forces in force analysis
USEFUL FOR

Students and professionals in mechanical engineering, particularly those studying dynamics and control systems, will benefit from this discussion. It is also useful for anyone involved in modeling physical systems with torsional springs.

theone
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Homework Statement


I am just wondering what effect a torsional spring, with constant K, would have on the equations (1) to (5), under the section "Force analysis and system equations". The torsional spring is located where the pendulum and cart are connected
http://ctms.engin.umich.edu/CTMS/index.php?example=InvertedPendulum&section=SystemModeling

Homework Equations

The Attempt at a Solution


I think it would only affect the moment equation, with an extra term K(theta)?
 
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Wouldn't the spring be attached to the cart? And thus exert a force on the cart as well as the rod?
 
BiGyElLoWhAt said:
Wouldn't the spring be attached to the cart? And thus exert a force on the cart as well as the rod?

i don't know what forces are involved, wouldn't those just be reaction forces covered by P and N on the website
 

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