Using Simulink Clock as a Chart Transition Condition

Question

Chuck Rogal 2019-3-29

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回答： Vignesh 2019-4-1

After bringing in the clock I am using its value as a relational operand in a transition condition (t > x). Upon reaching the state with the outbound transition, the clock's value magically jumps from t < x to t > x which makes the condition always true. This is unexpected. I want it to monotonically increase (as usual) until the condition becomes true. How can I make the clock behave differently?

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Fangjun Jiang 2019-3-29

Not clear. Are you using a "Clock" block in Simulink and make it as an input to your Stateflow chart, or do you have a counter/timer within the chart?

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Answer 1

Chuck Rogal 2019-3-29

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Sorry, I am bringing in the clock from a clock block and want to use its value in a transition condtion. The clock monotonically increases until it gets to the state with the transition and then it jumps so the condition is always true. I want it to continue to behave as a monotonicly increasing clock instead of jumping ahead.

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Fangjun Jiang 2019-3-29

It should not happen like that. Make a simple example showing the problem so you can be helped.

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Answer 2

Chuck Rogal 2019-3-29

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I am workiing with matlab support and will post the solution. Thanks!

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Answer 3

Chuck Rogal 2019-3-29

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No solution. That is how the clock in implemented.

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Answer 4

Vignesh 2019-4-1

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Can you help us understand the usecase better? Most clock mechanisms could be implemented with absolute time temporal logic, to take transition after certain time interval.

https://www.mathworks.com/help/stateflow/ug/using-temporal-logic-in-state-actions-and-transitions.html