Important application in AutoMATIC CONTROL

1. Mechanical
Accelerometers

2. Introduction to Mechanical
Accelerometers
Mechanical accelerometers are
devices used to measure
acceleration and vibration. They
play a crucial role in various
industries, including automotive,
aerospace, and manufacturing.

3. How Mechanical Accelerometers Work
Mechanism
Mechanical
accelerometers use a
mass-spring system to
convert mechanical
motion into an
electrical signal.
Principle
They operate on the
principle of inertia,
where the mass resists
changes in velocity,
providing a measure
of acceleration.
Signal Output
The mechanical
displacement is
translated into an
electrical output,
usually in the form of
voltage or current.

4. Components of a Mechanical Accelerometer
1 Sensing Element
The core part that
detects the
mechanical
motion and
generates the
electrical signal.
2 Spring System
Provides the
restoring force to
the sensing
element and aids
in converting
mechanical
motion to an
electrical signal.
3 Damping System
Reduces
oscillations in the
output signal to
ensure accurate
measurement of
acceleration.

5. System equations
The sum of forces acting on the mass

6. System equations

7. System equations

8. System equations

9. System equations

10. System equations

11. System equations
• The chart displays the movement of an
accelerometer's internal part over time in
reaction to acceleration.
• Initially, the movement changes rapidly.
• Eventually, the movement evens out to a
steady, constant rate.
• The curve's progression indicates the presence
of damping, which reduces excessive
oscillation.
• The use of a negative sign and multiplication
by 2 is to enhance visibility of the chart's
details and does not affect the movement
pattern represented.

12. • Salma Magdii
• Aliaa Tarek
• Omnia Mohammed
• Farah Mohammed
• Abdallah Hassan
• Abdelrahman Abdelhay
• Mahmoud Osama
• Abdallah Shokry
Prepared by :
Presented to :
Dr. Neama Youssef