Question

-331.5 273.1 m/s What kind of measurement system can you establish to use representative figure, and give an example with parametric values this feature? Explain with a Answer: [15 points] Explain the working principal of an accelerometer. Show a representative figure and derive the transfer function in detailed. 4. Answer:

Answer 1

Working principle of accelerometer

The principle of working of an accelerometer can be explained by a simple mass (m) attached to a spring of stiffness (k) that in turn is attached to a casing, as illustrated in fig. The mass used in accelerometers is often called the seismic-mass or proof-mass. In most cases the system also includes a dashpot to provide a desirable damping effect.

The dashpot with damping coefficient (c) is normally attached to the mass in parallel with the spring. When the spring mass system is subjected to linear acceleration, a force equal to mass times acceleration acts on the proof-mass,causing it to deflect. This deflection is sensed by
a suitable means and converted into an equivalent electrical signal. Some form of damping is required, otherwise the system would not stabilize quickly under applied acceleration.

Transfer Function-