Moment of inertia and Center of mass

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SUMMARY

The discussion focuses on calculating the Moment of Inertia (MOI) and the Center of Mass (COM) for a convex shape defined by a set of points. The formula for MOI is established as MOI = Σmiri² or ∫ρiri²dl, where 'ri' represents the distance from the points to the axis of rotation. The participants confirm the correctness of these formulas in the context of rigid body dynamics. The discussion emphasizes the importance of understanding the coordinate system and the distribution of mass in these calculations.

PREREQUISITES
  • Understanding of rigid body dynamics
  • Familiarity with calculus, specifically integration techniques
  • Knowledge of mass distribution and density functions
  • Basic geometry of convex shapes
NEXT STEPS
  • Study the derivation of the Moment of Inertia for various geometric shapes
  • Learn about the application of integration in calculating COM for irregular shapes
  • Explore the use of software tools like MATLAB for numerical MOI and COM calculations
  • Investigate the relationship between MOI and rotational dynamics in physics
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Students and professionals in physics, mechanical engineering, and robotics who require a solid understanding of the calculations involved in determining the Moment of Inertia and Center of Mass for various shapes.

daniel_i_l
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Lets say I have some convex shape defined by a set of points in a clockwise direction. How do I calculate the MOI and the COM?
 
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calculate the MOI.
first assume the coodinat of the axis is (x,y,z).and the distance from points to axis are known as ri.then the MOI =Σmiri^2 or ∫ρiri^2dl
do you think it is right?
 

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