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MICRO-372: Advanced mechanisms for extreme environments

Ce cours présente des concepts d'ingénierie mécanique avancée au travers d'exemples concrets de mécanismes de précision. Ceux-ci fonctionnent dans des environnements extrêmes, que ce soit dans l'espace ou sur terre. Les notions théoriques sont approfondies ...

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Related concepts (29)

Moment of inertia

The moment of inertia, otherwise known as the mass moment of inertia, angular mass, second moment of mass, or most accurately, rotational inertia, of a rigid body is a quantity that determines the torque needed for a desired angular acceleration about a rotational axis, akin to how mass determines the force needed for a desired acceleration. It depends on the body's mass distribution and the axis chosen, with larger moments requiring more torque to change the body's rate of rotation.

Inertia

Inertia is the idea that an object will continue its current motion until some force causes its speed or direction to change. The term is properly understood as shorthand for "the principle of inertia" as described by Newton in his first law of motion. After some other definitions, Newton states in his first law of motion: LAW I. Every object perseveres in its state of rest, or of uniform motion in a right line, unless it is compelled to change that state by forces impressed thereon.

Second moment of area

The second moment of area, or second area moment, or quadratic moment of area and also known as the area moment of inertia, is a geometrical property of an area which reflects how its points are distributed with regard to an arbitrary axis. The second moment of area is typically denoted with either an (for an axis that lies in the plane of the area) or with a (for an axis perpendicular to the plane). In both cases, it is calculated with a multiple integral over the object in question.

Moment (mathematics)

In mathematics, the moments of a function are certain quantitative measures related to the shape of the function's graph. If the function represents mass density, then the zeroth moment is the total mass, the first moment (normalized by total mass) is the center of mass, and the second moment is the moment of inertia. If the function is a probability distribution, then the first moment is the expected value, the second central moment is the variance, the third standardized moment is the skewness, and the fourth standardized moment is the kurtosis.

Moment (physics)

In physics, a moment is a mathematical expression involving the product of a distance and physical quantity. Moments are usually defined with respect to a fixed reference point and refer to physical quantities located some distance from the reference point. In this way, the moment accounts for the quantity's location or arrangement. For example, the moment of force, often called torque, is the product of a force on an object and the distance from the reference point to the object.

Related lectures (49)

Solid Rotation: Moment of Inertia

Explores solid rotation, angular momentum, and moment of inertia calculation methods.

Solid Rotation: Moment of Inertia

Explores solid rotation, moment of inertia, and the Huygens-Steiner rule for parallel axes.

Mechanics: System of Point Masses

Introduces mechanics concepts for systems of point masses, including moment of forces and kinetic energy conservation.

Rotation Dynamics: Moment of Inertia and Kinetic Energy

Explores rotation dynamics, moment of inertia, and kinetic energy in solid bodies rotating around a fixed axis.

General Physics: Angular Momentum of a Thin Disk