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From: Arnaud Miege on 13 Jul 2010 11:08
"Lallaey khan" <sidh.sinha(a)yahoo.com> wrote in message <humggt$d9e$1(a)fred.mathworks.com>...
> Hi,
> In the "Power Unit with Fixed-Displacement Pump Demo", the port R of the torque sensor is attached to the angular velocity source and port C to the shaft whose torque is being monitored. My question is that Port C is the reference probe, so why it is connected to the shaft? shouldn't it be connected to the angular velocity port?
> (Type sh_power_unit_fxd_dspl_pump in the command window.This will open the model and the orientaiton can be checked)
>
> Any comment will be highly appreciated. Thanks!
>
>
You can actually orient the torque sensor block either way, as long as it is in series, not in parallel. It'll just change the sign of the torque you measure. It's a matter of sign convention.

Arnaud
From: Arnaud Miege on 13 Jul 2010 11:10
>
> Hi, I've got a similar problem. I need to measure the force from a
> pneumatic piston chamber driven by air pressure. I did what you told,
> but it still doesn't work and reports the same error log. How can I
> sort it out?
> Thanks in advance

Again, you need to insert the force sensor block in series, not in parallel, because force is a through variable. If it still doesn't work, there's something else that's wrong with your model (as a check, try removing the force sensor, and see if you still have the same error).

HTH,

Arnaud
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