In "frestimat​e(modelnam​e,op,io,in​)", the linearization I/O io(1) seems to be a non-double signal. All input and output IOs are required to be on double signals.

i am currently tryingto simulate a quadcopter model that i found online. i edited few perameters and was trying to tune it afterwards to get it to stabilise.

As it opens the PID tuner, it cannot linearise the model so i used systems identification to simulate the model. the problem is when i try to do that, i get the following error.

In "frestimate(modelname,op,io,in)", the linearization I/O io(1) seems to be a non-double signal. All input and output IOs are required to be on double signals.

this happens when i try to tune the pitch or roll PIDs.

i got the model from the follwing link.

https://uk.mathworks.com/matlabcentral/fileexchange/63580-quadcopter-simulation-and-control-made-easy

does anyone know what this means or how could it be fixed.

Thanks all.

[Lishein Wijesundara Mudiyanselage]

Hi, i am encountering the same issue, did u find a fix?

[Kaiyong Zhou]

I am too,why

[妙菡]

• Hello, how did you solve this problem？ Thank you very much.

[Djordje]

Hi, did someone manage to find potential solutions?