An essential part of this project and of any engineering project is to record inputs and outputs to both systems and record the difference. Alot of the practical experimental work will be carried out after christmas, this semester I need to put together a test plan for both the old and new designs and a way of comparing the results.
The system has changed again, I recently had a meeting with my tutor and he urged me to get all of my ideas down into a few clear options and compare them. I should be looking at something that is achievable with the resources I have and also worth while doing.
We came to the conclusion that I should look at a way of measuring the current, voltages and speeds of both systems. Both systems should run the motors in pairs. In my last post I discussed the idea of having one motor powering a differential with a redundant motor waiting to be activated in case of a fault. This would not work, the differential would not transmit torque unless the redundant motor was locked.
This can be overcome by powering both ends of the differential, but have two redundant motors and a redundant differential all in case of a fault. This leads to an increase in the number of components which increases the probability of a fault however it will suffice for experimental purposes.
I have started reading Electric Machines by Charles Gross, the main piece of information I am looking for is an equation to describe the relationship between the Torque produced by a motor and the Current. Also the relationship between the speed and the voltage supplied.
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