Propeller Connetion to Motor

Hello,

I am trying to model the propeller + ship resistance and connecting it to a motor.

As shown below.

I got the resistance and propeller from the "Ship Propeller" example in Simulink.

My question is the following:

• how do i connect R1 output of the propeller to the motor?
• What does R1 represent? Will it be propeller RPM?

Thank you in advance!

Answer 1

[Swastik Sarkar]

Hi @Sharul Baggio,

The conserving port R1 is a pivotal element in these simulations, ensuring the accurate propagation of angular velocity within the system., You can explore the specifics here:

https://www.mathworks.com/help/sdl/ref/marinepropeller.html#mw_d5f8346b-45d7-4c14-81ce-8229bff51d11

Physical conserving ports allow physical connections in its respective physical modelling domain.

To deepen your understanding of conserving ports and their significance in Simscape models, the following resource offers a thorough explanation:

https://www.mathworks.com/help/simscape/ug/basic-principles-of-modeling-physical-networks.html#bq89sba-6

R1 serves as a mechanical rotational conserving port associated with the rod interface, crucial for propagating angular velocity from the power source to the propeller in marine simulations. Instead of using an angular velocity source, you can use a DC Motor in the ship propeller as given in the below figure:

Be sure to set a high enough voltage for the motor for the propeller to significantly move the Ship Resistance.

I hope this helps you in modelling your own Ship Propeller

[Sharul Baggio]

Thank you @Swastik for answering.