Simulink Level 2 S Functions Part 2

[@Kutsuna520]

We are still interested in the instructions though 8 years later, and they are increasingly valuable in today’s matlab version where level-1 sfunction has been totally deleted.

[@Minas841]

Thank you Matthew for these videos. I'll wait the example where we have derivative equations to solve or state space variables.

[@quebeccapellaquebeccapella4347]

Thanks, you're the best

[@DPEP56]

Thank you so much for this and the part 1 video! I've been struggling with connecting a device that did not come with Simulink support to the program for some research. This video was incredibly helpful!

[@danylomalyuta7411]

Fantastic set of tutorials! I wish they came 3 months earlier when I was doing a project where I was constrained to using Level-1 S-functions because I couldn't understand Level-2 S-functions.

[@shwetaarian7724]

Thanks Matthew Sir, It was really helpful. we are looking forward for part3

[@mukhtarsani9871]

Thank you for this wonderful video. Kudos.

[@TheMariapparaj]

It works fine. Thanks Prof.

[@flaviadantas5971]

Thank you! It was really helpful. Looking foward for an example with parameters and derivative equations, it's not working here. :)

[@cvalencia100]

Excellent video! Please do a second video explaining how to use memory and work vectors!

[@sriramkrishnamurthy9881]

Hi Matthew. The video was very informative. Can you please put up a video for generating s functions for solving simultaneous ordinary differential equations with initial conditions?

[@suriyapriya4664]

Thank you so much.its useful for my research work.i got some ideas. thank you once again

[@yogeshj7053]

Really well explained! Thank you!

[@zhouliangcai6782]

Really Helpful!

[@EastAfroEntertainment]

@Matthew Very interesting!!! I followed your steps but when i tried to run the simulink model i keep getting this error 'The expected number of dialog parameters of 'Simulink_file_name' (1) does not match the number of dialog parameters specified in the matlab s-function parameters dialog box (0)' Could you help me in solving this issue? Thanks you!!!

[@kimteeramsagur6123]

THANK YOU !!!!!

[@EastAfroEntertainment]

@Matthew Did you think it is possible to stream a real-time data from matlab to simulink using s-func???

[@rafaelfernandez6865]

Thanks for sharing Matthew, I am trying to do a s-function in order to process data which I am acquiring from an android mobile (real-time), however I get always an error. Do u know if it is possible?

[@edoardoperego8063]

HI +Matthew Rhudy, I have a problem! if I run the simulation matlab told me undefined function or variable "block" and whn I chance the name in the block editor it give me error. should I define the variable block before? thx! Edoardo

[@dano1390]

Thanks for the videos Matthew they are quite helpful. I have a question, if I would like to use an unitary step function with a step time 5 second as input to trigger the time for the s-function. In other words I would like that the outputs remain = 0, until the s-function detects a change in the step input from 0 to 1, and then starts the computations. Do you have any suggestion for that?

[@matthewrhudy2324]

+Dan O You could consider having an input port for the step input, and then just have a simple "if" statement inside the "output" function to define the outputs appropriately, i.e. if step_input < 1, outputs = 0, else, outputs = ...

[@dano1390]

+Matthew Rhudy Thanks for the reply, it works if the outputs are constants, but if the output depends on time for example output = cos(alpha*t), alpha is a constant and t should start from 0 when the step input reaches 1. Any idea?

[@matthewrhudy2324]

+Dan O You could shift the time by the step time, e.g. output = cos(alpha*(t - t_step));

[@siuuomi]

Thank you m9

[@aqsashines]

Hi methew, is there any contact detail of yours? I want to use flag initialization can you guide about it. Moreover in video 1 you mentioned about initialze condition for md1, can i use it to reset output

[@zihuixu4619]

excese me,can you answer how to solve the fractional equations by s-function