Triggering blocks on simulink
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Hello!
I have a simulink system with two blocks, a and b. When block a outputs a value 0.75, block b has to stay up and runnning, which will alter the value of block a. And once block a has reached a value 0.85, block b shuts down. How can I simulate this? I'm trying to use the triggered subsystem but I don't know if it is correct (the triggered subsystem with a rising edge, the output of block a as input, 0.75 as the minimum signal value and 0.85 as the maximum. Is this correct?)
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Joel Van Sickel
2020-5-21
0 个投票
Hello Maria,
you may want to consider using the enabled subsystem, so that it keeps running till the enable signal goes low again. Then you can have it on while the values is between 0.75 and 0.85 by using basic comparisons and logic.
Regards,
Joel
3 个评论
Maria de Eusebio
2020-5-21
Joel Van Sickel
2020-5-21
ah, the enabled subsystem will still work, you just need to modify your logic to stay high after passing 0.75, and then you want to reset it to 0 once it passes 0.85. You can do this with a latch or flip flop type logic.
If you use the block in the link below, you can feed a rising edge trigger n 0.75 to S, and a rising edge trigger to R on 0.85 and I think it will do what you want. I haven't tested it out though.
Maria de Eusebio
2020-5-21
更多回答（1 个）
Fangjun Jiang
2020-5-21
0 个投票
It sounds right. Comparing a with 0.75 and 0.85 will generate two high or low logical signals. Combine these two logical signals to determine triggering the subsystem, either use edge trigger or enable/disable the subsystem.
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