modulation of a torque signal over a certain number of motor revolutions ?
Posted on 2014-10-10
In vehicle seat structures a variety of motor-gear combinations are used Rack or spindle drive for the slide adjustment, spur wheel, worm gear or planetary gear - coupling the motor over sometimes long, flexible shafts to the seat structure. Each configuration, in particular spur gears, usually produces a modulation of the torque signal over a certain number of DC Motor revolutions.
Please explain the last sentence.