Intro to Robotics Propulsion

The propulsion system is also called the:

• Structural System

• Motion System

• Control System

• Sensor System

Which gear always goes in the numerator of a gear ratio calculation?

• the driving gear

• the driven gear

• either, it doesn’t matter

• neither, this is not the way you calculate gear ratio

The gear ratio of 2 gears with the same pitch is the same as:

• The ratio of the diameters

• The ratio of the number of gear teeth

• The ratio of the circumferences

• All of the above

Which device converts electrical energy into mechanical energy?

• Generator

• Battery

• Light Bulb

• Motor

How do we control the speed of a DC motor?

• By changing the wires

• By converting from DC to AC

• By changing the amount of DC voltage

• You cannot control the speed of a DC motor

What is the relationship between DC motor speed and DC motor current?

• They are inversely related

• They are directly related

• It depends on the gear ratio

• There is no relationship between DC motor speed and DC motor current

What symbol do we use for angular velocity?

• Ω

• ω

• ϕ

• τ

What term is common for angular velocity in America?

• RPM

• MPH

• MPG

• Radians per second

Which of the following gets electricity into the rotor?

• Axle

• Stator

• Commutator

• Brushes

Which of the following switches voltage polarity during rotation?

• Axle

• Stator

• Commutator

• Brushes