Recent content by remz

It is just as well that she couldn't find her car. What would have happened when she reached the first set of traffic lights that showed red?!

Any ideas on a simple experiment I can setup to calculate the moment of inertia for any object (sanity check only). Another post on PF proposed using a pendulum however unfortunately did not go into enough detail and my google skills are obviously lacking tonight. Since... J = \frac...

NoTime: I calculated the moi for a single blade using: J = m x r^2 and as moi are additive and as I have 6 blades of equal mass and equal perpendicular distance from the axis of rotation, I simply multiplied this value by 6: Jl = 6 x (m x r^2) Could you please elaborate on the error in my...

Thank you for taking the time to respond. I used point mass to derive the moi. This was not in fact for a whisk but for an agitator to stir the contents of a chemical reactor similar to this http://www.dynamixinc.com/images/titan_2.gif Using J = mR^2, I made the simplifications that the...

Looking at the project manager as the team leader, it seems only fair that they should be appraised when the going is good but equally hammered when the going is tough. Although, I have to say that people bashing is never a good long-term incentive and really it is the roots of the problem...

Hi, So I have a DC motor powering a whisk (http://upload.wikimedia.org/wikipedia/commons/8/85/Schneebesen1.JPG). Imagine the whisk on the end of the motor shaft. I'd like to know what torque requirements I have for the motor to ensure that it can successfully spin the whisk. Background...

Hi, I'm developing a feedback control system which explicitly comprises a model of the dynamic plant (inc. actuators). Any thoughts on programming methods I can use to describe the dynamic system which should provide valid results for a given input (step, ramp, impulse) in both time and...

The linearisation will be to analyse the system in the s-domain.

I'm working on a developing a position control system for a robotic shoulder joint driven by a DC motor. To simplify, the robot arm can be viewed as being in a fully extended state. I have now reached a stage where I can no longer ignore the affect gravity has on the torque generated by the...