Mass element with fixed inertial properties
The Inertia block adds a point or distributed
mass with fixed inertial properties to the attached frame. The type
of mass depends on the inertia parameterization selected. A
Mass parameterization enables you to model a concentrated
mass with no rotational inertia. A
enables you to model a distributed mass with the specified moments
of inertia, products of inertia, and center of mass. An inertia icon
identifies the inertia location in the Mechanics Explorer visualization
This block supports code generation for real-time simulation tasks. Certain blocks and block settings may be more suitable for simulation on a real-time device. For suggestions on how to improve real-time simulation performance, use the Simulink® Performance Advisor (Simulink). Suggestions include ways to reduce model complexity where helpful and to decrease numerical stiffness.
Select Analysis > Performance Tools > Performance
Advisor in the Simulink menu bar to
open the Performance Advisor. Set the Activity parameter
Execute real-time application to view
suggestions specific to real-time simulation performance. Expand the Real-Time node
in the tree view pane to select performance checks specific to Simscape™ products.
R— Reference frame
Local reference frame of the inertia element. Connect to a frame line or frame port to define the relative position and orientation of the inertia.
Type— Inertia parameterization to use
Inertia parameterization to use. Select
Point Mass to
represent a mass with no rotational inertia. Select
represent a distributed mass with rotational inertia.
Mass— Aggregate mass of the solid
Aggregate mass of the solid. The mass can be a positive or negative value. Specify a negative mass to model the aggregate effect of voids and cavities in a compound body.
Custom: Center of Mass— Center-of-mass coordinates
[x y z] coordinates of the center of mass relative to the block reference frame. The center of mass coincides with the center of gravity in uniform gravitational fields only.
Custom: Moments of Inertia— Diagonal elements of inertia tensor
Three-element vector with the [Ixx Iyy Izz] moments of inertia specified relative to a frame with origin at the center of mass and axes parallel to the block reference frame. The moments of inertia are the diagonal elements of the inertia tensor
Custom: Products of Inertia— Off-diagonal elements of inertia tensor
Three-element vector with the [Iyz Izx Ixy] products of inertia specified relative to a frame with origin at the center of mass and axes parallel to the block reference frame. The products of inertia are the off-diagonal elements of the inertia tensor