Gears Flashcards
is a machine
element of a mechanical
system formed by mounting
gears on a frame so the teeth
of the gears engage.
gear train
Usually,the first gear that is attached to the motor shaft
Drive Gear
the second gear is a “___”
attached to the load shaft.
driven gear
How to find gear ratio?
1.Count the number of teeth on
the drive gear.
2. Count the number of teeth on
the driven gear.
3. Divide the driven gear
teeth by the drive gear teeth.
how to pronounce this in gear ratio?
3/2
three to two
what does it mean in terms of turning(revolutions as well as speed or rad/sec)?
the driver must turn 1 and a half times to make the driven 1 full revolution means also that the larger gear that is the driven will turn more slowly
what if the gear ratio is inverted
The read is two to three
means that the driver is larger
but turns two times while the driven which is a smaller gear turns three times
also means that the driven is much faster than the drive
but the drive has more torque
consists of subsystems and processes assembled for the purpose of obtaining a desired output with desired performance, given a specified input.
Control Systems
is a collection of components working together under the direction of some machine intelligence.
Control Systems
two types of response
transient response
steady-state
the traditional term applied to describe a closed-loop electromechanical control system that directs the precise movement of a physical object such as a radar antenna or robot arm.
Servomechanism
4 advantages of control system
Power amplification
Remote control
Convenience of input form
Compensation for disturbances
three classifications of control systems
regulator system
follow-up system
event control system
automatically maintains a parameter at (or near) a specified value.
regulator system
causes an output to follow a set path that has been specified in advance
follow-up system
controls a sequential series of events.
event control system
signal representing the desired system output
set point
intelligence of the system; usually electronic
controller
- electromechanical device that converts the signal from the controller into some kind of physical action
actuator
physical process being affected by the actuator
process
the measurable result of that process
controlled variable
5 parts Control System: Block Diagram
set point
controller
actuator
process
controlled variable
Open-Loop System starts with
input transducer
input transducer converts signal that can be used by
the controller
the controller drives the
process or a plant
other term for input
reference
output is sometimes called as
controlled variable
yield the algebraic sum of their input signals using associated signs
summing junctions
