Vibration and frequency measurements are important for several reasons: to check if machines may fail due to resonant conditions at high speeds, to see if excessive vibrations could impact other machines, and to evaluate machine health. Key instruments for measuring vibrations include vibrometers for displacement, velometers for velocity, and accelerometers for acceleration. Frequency measurement is also important for understanding dynamic behavior and identifying parameters like mass and stiffness.

1. AE6602-VIBRATION AND ELEMENTS OF AEROELASTICITY
UNIT-II
B.DEEBAN, ME(PhD)
ASSISTANT PROFESSOR
KIT-KALAIGNARKARUNANIDHI INSTITUTE OF TECHNOLOGY
COIMBATORE

2. Vibration and Frequency Measurements

3. Reasons for the measurement of
vibrations
• Some machines are running at high speeds which
may cause resonant condition and they may get fail.
• In some situations the excessive vibrations may
transfer to the nearby machines or structures.
• To check the health of the machines.
• To understand the dynamic behavior it is necessary to
measure the vibrations.
• It helps to identify important parameters of system
such as mass, stiffness, damping.

4. Vibration Measuring Instruments
• Displacement measuring instrument
(Vibrometer)
• Velocity measuring instrument (Velometer)
• Acceleration measuring instrument
(Accelerometer)

5. INTRODUCTION

6. INTRODUCTION

7. Theory of Vibration measuring
instruments

29. Frequency Measurement