how can solve breakingpoint in simulink ?

Question

ADNAN KIRAL 2018-12-14

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/435808-how-can-solve-breakingpoint-in-simulink

评论： ADNAN KIRAL 2018-12-15

采纳的回答： Fangjun Jiang

在 MATLAB Online 中打开

hi,

I am using SIMULINK, and I keep seeing this error

"The problem occurs at element 3. Change the breakpoints data or use the fixed-point tools such as Auto Scaling or Fixed-Point Advisor to determine a different parameter dialog type".

when i change "cp1,cp2,cp3,cp4" in my code :

i saw this problem

By the way,

my max step size=0.02;

min step size= auto

relative tolerance=1e-3

absolute tolerance=auto

solver=ode45, variable step

er=40;
cp1=0.833*10^6; cp2=1.67*10^6; cp3=7.84*10^6; cp4=14.7*10^6;
lookup_in=[0 (cp1+cp2)/2 (cp1+cp2)/2+er*eps (cp2+cp3)/2 ...
          (cp2+cp3)/2+er*eps (cp3+cp4)/2 (cp3+cp4)/2+er*eps 100];
lookup_out=[cp1 cp1 cp2 cp2 cp3 cp3 cp4 cp4];

can anyone please help me with that ?

thanks in advance,

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Answer 1

Fangjun Jiang 2018-12-14

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/435808-how-can-solve-breakingpoint-in-simulink#answer_352444

The values in lookup_in must be monotonically increasing. Right now it is not.

The third value is not regarded as larger than the second value becuase the difference is so small. The resolution must have been lost. The last value (100) is also problematic.