What is the difference between the STATE and OUTPUT of a simulink block. Please explain using one example.
9 views (last 30 days)
Show older comments
As i was using the enabled subsystem, i want to understand the use of the 'STATES WHEN ENABLING' option. So i want to understand the difference between state and output of a simulink block.
0 Comments
Answers (1)
Iain
on 7 Jun 2013
A state is a set of values or conditions. (a column vector)
Output is what is output. The output is some function of the state, and the inputs. That function is often "do nothing".
4 Comments
Iain
on 7 Jun 2013
Edited: Iain
on 7 Jun 2013
A different example is a weight on a spring.
The state is the position and velocity. You input an external force, causing an acceleration, affecting the state (both of them). Viscous forces are generated based on the velocity. Spring forces are generated based on the position.
The output (the bit you are using) might be the acceleration, or it might be the velocity, or the speed, or the force.
Iain
on 7 Jun 2013
The mathematical definition is:
Updated_State = A * Old_State + B * Input;
Output = C * Updated_State + D * Input;
So you can get:
New = [1 0.1; 0.1 1] * [0; 1] + [0; 0.01] * 5;
Output = [4; 5] * New + [2] * 5;
See Also
Categories
Find more on Sources in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!