Documentation

Translational Power Sensor

Mechanical sensor used to measure average or instantaneous translational power

Library

Sensors

Description

The block represents a sensor that measures the translational power change due to one or more driveline components connected between ports R and C. The power output can be an instantaneous or average value. Two averaging options are available: period and vibration averaging.

The instantaneous power is the product of the current velocity and force. Use the instantaneous power to analyze peak power transmission and identify heavily loaded components.

The time-averaged power is the integral of the instantaneous power over one sample period, divided by that period. For simulation times smaller than the sample period, the average power is zero. The power is constant for each sample period.

The vibration-averaged power is the integral of the power over one vibration period, divided by that period. The vibration period is the time between two consecutive crossings from negative to positive velocity values. Use this averaging method only for oscillations with velocity passing through zero. If the vibration has a variable frequency, the averaging period can change. For simulation times smaller than the vibration period, the average power is zero. The power output is constant for each vibration period.

Dialog Box and Parameters

Measurement Type

Select either instantaneous or average power measurement. The default type is Instantaneous Power.

  • Instantaneous power — Output the power measured for the current time step.

  • Average power over a specified period— Output the power averaged over a fixed time period.

    Averaging period

    Enter the time period used to compute the average power. Typical values include the cycle length of a reciprocating device or the actuation force.

    The default value is 1. The default unit is s.

  • Average power over a vibration— Output the power averaged over one vibration period.

    Maximum vibration frequency

    Enter the maximum vibration frequency over which the power should be averaged. Very high values can reduce simulation speed. Very low values can result in lower power measurements.

    The default value is 1000. The default unit is Hz.

Ports

PortDescription
PPhysical signal output port for translational power
SMechanical translational conserving port associated with driving source
RMechanical translational conserving port associated with loaded driveline components
CMechanical translational conserving port associated with case holding loaded driveline components

Introduced in R2013a

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