Engee documentation

Gear Box

Transmission box.

blockType: AcausalFoundation.Mechanical.Mechanisms.GearBox

gear box

Path in the library:

/Physical Modeling/Fundamental/Mechanical/Mechanisms/Gear Box

Description

Block Gear Box It is an ideal, non-planetary gearbox with a fixed gear ratio. The gear ratio is defined as the ratio of the angular velocity of the input shaft to the angular velocity of the output shaft.

The transmission is described by the following equations:







where

  • — angular velocity of the input shaft;

  • — angular velocity of the output shaft;

  • — gear ratio;

  • — torque on the input shaft;

  • — input shaft power;

  • — output shaft power.

Pay attention to the minus sign when calculating . One of the rules for making mechanical models is that the power flowing through the port is positive if it is dissipated, and negative if the component generates energy into the system.

The S and O connections are mechanical rotary ports connected to the input and output shafts of the box, respectively. The positive direction of the block is from S to the reference point and from the reference point to O.

Variables

Use the parameter group Initial Targets to set the priority and initial target values for the block parameter variables before modeling. For more information, see Configuring physical blocks using target values.

Ports

Conserving

# S — input shaft
rotational mechanics

Details

Mechanical rotary port, corresponds to the input shaft.

Program usage name

input_flange

# O — output shaft
rotational mechanics

Details

Mechanical rotary port, corresponds to the output shaft.

Program usage name

output_flange

Parameters

Parameters

# Gear ratio — Gear ratio

Details

The ratio of the angular velocity of the input shaft to the angular velocity of the output shaft. It can be either positive or negative.

Default value

5.0
Program usage name

ratio
Evaluatable

Yes

Examples