Creating a Condition for Equipment Start-up

[cphillipson]

I'm trying to create a startup capsule for a gas turbine. How do I create a Capsule using the start of one Capsule and end when a signal reaches a certain value?

 

Thanks in Advance

 

Chris

[Lindsey.Wilcox]

Hi Chris-

I think this can be achieved using a combination of the Value Search and Composite Condition tools.  

In the following screenshot, I have a signal (temperature) and a condition (Start Capsule).  Let's say I'd like to create a new condition that starts at the start of each capsule in Start Capsule and ends when the temperature is 90.

First, use the Value Search tool to identify when the temperature is 90 F.

This results in several small capsules each time the temperature is 90 F.

Next, combine these 2 conditions using the join operator in the Composite Condition tool:

This results in a new condition (Start to Temp=90) where each capsule starts at the start the Start Capsule capsule and ends at the start of the Temp=90 capsule.

Please let me know if you have any additional questions.

Thanks,

Lindsey

[cphillipson]

Hi Lindsey,

Thanks for the swift reply, I think this might go some way to solving the problem. The Value I'm wanting to search for varies as it's a signal. How would you go about doing that.

Thanks in advance.

Best regards

Chris

[Thorsten Vogt]

Hi Chris,

you can use Deviation Search for this. 

I altered @Lindsey.Wilcox example by using another signal that acts as the limit:

Using Deviation Search you can find capsules, when the value is above the threshold:

In the last step you combine the conditions to get the desired capsules. Make sure you uncheck "Inclusive of B", otherwise the resulting capsules are extended by the duration of B.

Hope this helps.

Regards,

Thorsten

 

 

Edited January 13, 2020 by Thorsten Vogt

[cphillipson]

Hi Thorsten,

Thanks for the update, that's solved my problem.

Thank you both again.

Best regards

Chris