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Avoiding mechanical (speed, torque) sensors in electric motor control entails cost reduction and reliability improvement.
The rotor mechanical speed and the stator currents/voltages are assumed to be measured.
After making sure all parts were assembled correctly, the mechanical speed control, speed control servo, and radio receiver module were all removed.
It consists in resorting to observers to avoid mechanical (speed, torque) sensors and make the control system more reliable.
On the other hand, it is well known that the use of mechanical (speed, torque) sensors entails reliability issues.
The signals utilized are only the motor currents and voltages, whereas the transient mechanical speed is estimated from these measurements using a recently developed speed filter.
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Harmonic Drive, mechanical speed-changing device, invented in the 1950s, that operates on a different principle from, and has capabilities beyond the scope of, conventional speed changers.
Exact electrical synchronization of motor speed with generator speed is required, but the mechanical speeds need not be the same.
Then he signed the historical diagrams "FERRAN ADRIÀ." A meal at elBulli — sweet-and-spicy flash-fried shrimp tortilla, wild strawberries in wild-hare bouillon — showed that the French line setting off savory from sweet could be entirely bypassed, like other French defensive lines in history, by mechanical ingenuity, speed, and superior strategic thinking.
The mechanical drilling speed of the bionic coupling PDC bit is 2.5 times that of the conventional PDC bit, so the bionic coupling PDC bit can reduce drilling cycle and decrease drilling cost greatly.
Substrate strips of 10 × 60 mm were measured while initial grip separation and mechanical crosshead speed was set at 30 mm and 10 mm/min, respectively.
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