Ideal Angular Velocity Source

Ideal angular velocity source in mechanical rotational systems

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Libraries:
Simscape / Foundation Library / Mechanical / Mechanical Sources

Description

The Ideal Angular Velocity Source block represents an ideal source of angular velocity that generates velocity differential at its terminals proportional to the input physical signal. The source is ideal in a sense that it is assumed to be powerful enough to maintain specified velocity regardless of the torque exerted on the system.

Connections R and C are mechanical rotational conserving ports. Port S is a physical signal port, through which the control signal that drives the source is applied. The relative velocity (velocity differential) across the source is directly proportional to the signal at the control port S. The entire variety of Simulink^® signal sources can be used to generate the desired velocity variation profile.

The block positive direction is from port R to port C. This means that the velocity is measured as ω = ω_R – ω_C, where ω_R, ω_C are the absolute angular velocities at ports R and C, respectively, and torque through the source is positive if it is directed from R to C. The power generated by the source is negative if the source delivers energy to port R.

Examples

Mechanical Rotational System with Stick-Slip Motion

A mechanical rotational system with stick-slip friction. An inertia is connected to a fixed point by spring and damper. The inertia is driven by a velocity source via a stick-slip friction element. The friction element has a difference between the breakaway and the Coulomb frictions, resulting in stick-slip motion of the inertia.

• Open Model

Engine Cooling System

Model a basic engine cooling system using custom thermal liquid blocks. A fixed-displacement pump drives water through the cooling circuit. Heat from the engine is absorbed by the water coolant and dissipated through the radiator. The system temperature is regulated by the thermostat, which diverts flow to the radiator only when the temperature is above a threshold.

• Open Model

Ports

Input

S — Control signal, rad/s

physical signal

Physical signal input port, through which the control signal that drives the source is applied.

Conserving

R — Rod

mechanical rotational

Mechanical rotational conserving port associated with the source moving part (rod).

C — Case

mechanical rotational

Mechanical rotational conserving port associated with the source reference point (case).

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Version History

Introduced in R2007a