Project 1

Aim : Develop a double-acting actuator model using Simscape Multibody and Simscape components.

Objective :

• The mechanical system of the cylinder needs to be built using Simscape Multibody library components/blocks, and the hydraulic system needs to be modeled using Simscape library physical components.

Theory :

The following Cylindrical Model Schematic shows the three different configurations of the piston

Half Retracted, Fully Retracted, Fully Extended

How the Double Acting Hydraulic actuator works - 

Double-acting hydraulic cylinders have a Cylindrical housing and one piston. When hydraulic oil is supplied to its cap end port, hydraulic pressure force will be applied over the piston and the end cylinder will be extended. During the extension of the piston hydraulic oil at the rod, the end side will be pushed out and directed towards the reservoir.

For the returning stroke, the hydraulic direction is reversed with the help of the direction control valve. During the returning stroke hydraulic oil is supplied to the rod end side and hence piston is retracted. During the retracting of the piston cap end, oil is directed towards the reservoir. hence the double-acting hydraulic actuator operated in both the directions

The extra port also allows more control of the piston during retraction and ensures it always returns back to its starting point

 Difference Between Double Acting Hydraulic actuator and Single acting Hydraulic actuator

Simulink and Simscape Model :

Hydraulic system :(Physical model)

As we know we need constant hydraulic pressure for Double acting hydraulic actuator we used the Hydraulic pressure source block which supplies constant pressure of $4\cdot e^7$ Pascal.

Hydraulic fluid is used  -

Pressure Relief Valve -

Way Directional valve - 

Translational Hydro-Mechanical Converter(Chamber A) -

This block converts the hydraulic energy to mechanical actuation 

Translational Hydro-Mechanical Converter(Chamber B) -

Stroke length-

Mechanical Model :

Cylinder -

Bottom cap -

Head cap - 

Cylinder Body-

This hole cylinder assembly is connected to the base port of the prismatic joint

Piston head -

Rod - 

This is our assembly connected to the follower port of the prismatic joint 

Prismatic joint - 

it shows the prismatic motion of the piston with the base cylinder

Valve Input - 

Position of Rod (or Actuation)

Simulation of the model Link - 

https://drive.google.com/file/d/1EltRC4h5qrzL_j63Z6VidhgW9l-F3qyx/view?usp=drivesdk