Feedback loop design

[Canucks.canucks]

I'm wondering if you can recommend the hardware we need for this project
I need to understand what hardware I would need to buy in order to build a feedback loop where the blood pressure (measured from a rat) would be ‘outputted’ and able to control a motor that either sucked air out or pushed air into a sealed box that has half of the rodent inside. We have a simple version of this box designed where I can use a vacuum to suck air out of the box which ‘pulls’ the blood into the lower half of the rat (this is what the sealed box allows). The blood pressure is then reduced. I would like to now advance this by being able to say “I want to reduce blood pressure by exactly 10mmHg” – so the blood pressure would then precisely control how strong the motor is turned on….
 

[crossrulz]

What interfaces are given for your motor and blood pressure sensor?  That is what would determine what additional equipment you need.

[DuncanW.]

As crossrulz mentioned, it would help to know how each sensor will interface with any acquisition hardware, in order to recommend the best hardware for your application.

Using the information you have provided, it seems you need one analog input module (for the blood pressure sensor) and one analog output module (for the motor). If you are not particularly worried about the system response, then I would recommend a product in the cDAQ line. However, if your feedback loop needs to update the motor in real-time, then a cRIO product will probably be necessary. Ultimately, it is up to you how you realize the design you have described. There are a number of ways you can accomplish the same goal. 

Duncan W.