Damping

Question 1

how is the quality factor controlled?

Answer 1

by controlling the air pressure.

Question 2

Low damping typically requires…

Answer 2

operation in a vacuum.

Question 3

What is the limit of the total quality factor?

Answer 3

The total quality factor is smaller than the smallest of the individual qualitiy factors

Question 4

resonators and gyroscopes are typically operated in air or vaccum?

Answer 4

vacuum

Question 5

What are the 4 common sources of damping?

Answer 5

material losses, air damping, anchor losses, surface related losses, mode conversion losses

Question 6

What is material loss in MEMS?

Answer 6

It’s the loss due to friction between atoms, that causes heat generation

Question 7

Which damping mechanism sets the limit for the maximum obtainable quality factor?

Answer 7

internal friction= which is a materal loss.

Question 8

what does material damping depend on?

Answer 8

temperature, vibration frequency, the vibration mode