Differentiator Op Amp Robotic Arm with MOSFETs

131

01:19:56

   A Robotic arm similar to the Mars Exploration Rover that uses a differential op amp configuration. 

   Assume that there is a linear potentiometer attached to the the arm with a voltage source such that the arm's position is related to the voltage. In particular 1V corresponds to a displacement of 10cm of the arm from a reference position. 

   This circuit produces a voltage (V1) that is proportional to the velocity of the arm. 
Designed so that 1V corresponds to 1m/s

OPERATION: 
     v_arm  =>  position
                       x1 ---> x2
                       v1 ---> v2
    velocity = (dx/dt)  =>  {d(v_arm)/dt}           
       
$: v_1 = -RC * {d(v_arm)/dt}

REMEMBER: 
   - Velocity is the derivative of displacement

This is just a circuit from my PHYS:3410 hw. Any advice would be appreciated. Anything from the MOSFETs on is unnecessary, but I think it's cool.

published 7 years ago

jeremydyar

7 years ago

Try switching the POT arm in 10% increments. See what happens when you go either way

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