- #1
jakedehaas
- 7
- 0
Hi All,
First time poster on physics forums, but have been looking around for a while now. Very helpful site.
I'm currently undertaking a final year Mech Eng project studying the feasibility of installing a pendulum type vibration absorber onto small scale AC induction motors (1-2kw).
The problem I'm currently faced with is determining a way to test my designs in the lab. To do this, i need a way of obtaining 4 torque pulses per rev. I have come up with a couple of alternatives and need help with determining the suitability of each of the methods.
- The first method is using a stepper motor and providing it with a sinusoidal input to achieve as many torque pulses as i need per rev. Although the uni does have a number of signal generators and stepper motors, they are currently in use and hard to get a hold of.
- The other method is putting two universal joints in series with the yoke spaced at 90degrees from each other. I've done some work in Maple with the equations for the universal joints although I am not getting the results expected. Instead of getting four acceleration pulses per rev, i am only getting two on the final output shaft. I can post up the graphs and equations if required.
I would appreciate any input into this that anyone has. Apologies if this should have been posted in the homework section. I thought the engineering section was more appropriate.
Regards,
Jake
First time poster on physics forums, but have been looking around for a while now. Very helpful site.
I'm currently undertaking a final year Mech Eng project studying the feasibility of installing a pendulum type vibration absorber onto small scale AC induction motors (1-2kw).
The problem I'm currently faced with is determining a way to test my designs in the lab. To do this, i need a way of obtaining 4 torque pulses per rev. I have come up with a couple of alternatives and need help with determining the suitability of each of the methods.
- The first method is using a stepper motor and providing it with a sinusoidal input to achieve as many torque pulses as i need per rev. Although the uni does have a number of signal generators and stepper motors, they are currently in use and hard to get a hold of.
- The other method is putting two universal joints in series with the yoke spaced at 90degrees from each other. I've done some work in Maple with the equations for the universal joints although I am not getting the results expected. Instead of getting four acceleration pulses per rev, i am only getting two on the final output shaft. I can post up the graphs and equations if required.
I would appreciate any input into this that anyone has. Apologies if this should have been posted in the homework section. I thought the engineering section was more appropriate.
Regards,
Jake