hello friends, when i done a modelling in simulink error "the "FixedStepDiscrete" solver cannot be used to simulate block diagram,because it contains continuous states" is occuring.... even i tried all the solver types but nothing worked.. help me..

hello friends, when i done a modelling in simulink error "the "FixedStepDiscrete" solver cannot be used to simulate block diagram,because it contains continuous states" is occuring.... even i tried all the solver types but nothing worked.. help me.. whther i need to change any other settings... im a begginer in this domain... guide me pls

[youcef kesseir]

Hey is problèmes thé "fixedstepdiscrete" solver cannot be used to simulation block diagramme ' power PVarray grid det

Answer 1

[Sebastian Castro]

If you have continuous-time blocks like Integrators, Continuous State-Space/Transfer Function, etc., then you cannot use a discrete solver, as it does not support continuous states.

I am guessing you want to retain a fixed-step solver, so your option is then to either

1. Switch from a discrete solver to one that supports continuous states
2. Replace the continuous-time blocks with discrete-time blocks (like Unit Delay, Discrete Transfer Function, etc.)

To switch the solver: If you go to Simulation > Model Configuration Parameters, and then go to the Solver pane, try changing the solver from Discrete to any of the other fixed-step solvers like ode1 or ode3.

- Sebastian

[nivethitha p]

thank you sir for the reply... can you give me some tips to convert the state space block diagram from continuous to discrete...? and sorry for the delayed reply....

[Dao Vu]

Thanks Sebastian. It works for me. Just changed the solver to ode1

[MAHENDRAN A]

Actually nivethitha, you need to change the block parameters or the blocks itself. When you're seraching library browser, you can search for alternative discrete time blocks, so it will support fixed-step solver.

Answer 2

[Sandy]

Hi all,

How can I change the solver setting of simulink from Matlab workspace; goal is to set the Automatic Solver Parameter . I am using "set_param('modelname', ' Automatic Solver Parameter Selection' 'none') " but its not working. Can you please suggest me the right line code for this.

[Sebastian Castro]

Next time, try asking this in a new question. This makes sure other people can more easily search for your specific question if they are looking for it. Anyway, the code is:

set_param('modelName','SolverPrmCheckMsg','none');

- Sebastian

Answer 3

[Sandy]

Thanks! Sabastian..