# What are the causes of damping in an oscillator?

Viscous damping is caused by such energy losses as occur in liquid lubrication between moving parts or in a fluid forced through a small opening by a piston, as in automobile shock absorbers. The motion of a vibrating body is also checked by its friction with the gas or liquid through which it moves.
A.

### What is critically damped oscillation?

Critical damping provides the quickest approach to zero amplitude for a damped oscillator. With less damping (underdamping) it reaches the zero position more quickly, but oscillates around it. With more damping (overdamping), the approach to zero is slower.
• #### What is Overdamped circuit?

An RLC circuit is an electrical circuit consisting of a resistor (R), an inductor (L), and a capacitor (C), connected in series or in parallel. Introducing the resistor increases the decay of these oscillations, which is also known as damping. The resistor also reduces the peak resonant frequency.
• #### What do you mean by forced oscillations?

Free Oscillations, Forced Oscillations and Resonance. If no more external forces are applied to the system it is a free oscillator. If a force is continually or repeatedly applied to keep the oscillation going, it is a forced oscillator.
• #### What is natural frequency and damping ratio?

If a resonant mechanical structure is set in motion and left to its own devices, it will continue to oscillate at a particular frequency known as its natural frequency, or "damped natural frequency". The resonant frequency is also called the "undamped natural frequency".
B.

### What is meant by damped vibration?

A vibration or oscillation occurring in a damping medium is called damped oscillation. As a result a portion of the energy of the vibrator is converted to heat energy and thus the amplitude of the vibration gradually decreases logarithmically over time.
• #### What is the vibration motor?

Vibration motor is a compact size coreless DC motor used to informs the users of receiving the signal by vibrating, no sound. Vibration motors are widely used in a variety of applications including cell phones, handsets, pagers, and so on.
• #### What is the meaning of sharpness of resonance?

Frequency response is a measure of the amplitude of an oscillation as a function of frequency. Sharpness of resonance is defined by the Q factor, which is related to how quickly the energy of the oscillating system decays.
• #### What is a vibration test?

Vibration testing is done to introduce a forcing function into a structure, usually with the use of a vibration test shaker or vibration testing machine. Data Physics is a turnkey supplier of vibration test systems from electrodynamic shakers to intuitive and advanced vibration controllers.
C.

### What is underdamped and overdamped?

The system returns (exponentially decays) to equilibrium without oscillating. Critically damped. The system returns to equilibrium as quickly as possible without oscillating. Underdamped. The system oscillates (at reduced frequency compared to the undamped case) with the amplitude gradually decreasing to zero.
• #### What is the meaning of Undamped?

not damped or dampened; undiminished, as in energy, vigor, etc.: undamped spirits. Physics. (of an oscillation) having constant or increasing amplitude.
• #### What do you mean by transient response?

In electrical engineering and mechanical engineering, a transient response is the response of a system to a change from an equilibrium or a steady state. The transient response is not necessarily tied to abrupt events but to any event that affects the equilibrium of the system.
• #### What is the damping force?

in physics, restraining of vibratory motion, such as mechanical oscillations, noise, and alternating electric currents, by dissipation of energy is known as damping force. Unless a child keeps pumping a swing, its motion dies down because of damping.

Updated: 4th December 2019