JSBSim simulink

[Guolianyu123]

I'm a novice with jsbsim. Now I want to use jsbsim as the dynamic model and design the control part in simulink, but it seems that I have encountered some problems. I'd like to ask if the xml file needs to be modified

[agodemar]

@Guolianyu123 From the image you posted and from your message there is not much we can argue about your practical issue.

What do you want to achieve, exactly, and using which aircraft FDM?

[Guolianyu123]

My script is 737_cruise.xml. Initialization:

30000.0
750.0
0.0
47.0
122.0
0.0
225.0
0.0

I wanted to design a PID control algorithm in Simulink to achieve constant altitude cruising, such as at 20,000 feet. However, I found that the aircraft altitude was constantly dropping.

[seanmcleod70]

Double-check that the engines are started.

[Guolianyu123]

Double-check that the engines are started.

When I changed the value of throttle, the curve I got was different, so I think the engine should have started

[seanmcleod70]

Have you trimmed the aircraft successfully? The initialization you listed isn't good enough by itself unless the aircraft is trimmed for those initialization conditions.

[Guolianyu123]

Have you trimmed the aircraft successfully? The initialization you listed isn't good enough by itself unless the aircraft is trimmed for those initialization conditions.

Thank you.I will try again