Engineering College

A strain gauge is used to measure the strain on a vibrating beam which can vibrate up to a maximum frequency of 60 Hz. The strain gauge analog signal is converted in to a digital signal via an Analog to Digital Converter (ADC) in order to store the data on a computer hard drive. The engineer responsible for this measurement mistakenly selects a sampling frequency of 90 Hz for the ADC. (a) Determine the alias frequency due to the small sampling frequency. (b) Propose a sampling frequency that will not result into aliasing of the analog signal (make sure to provide your rationale for selecting this frequency)

Answers

Answer 1

The aliased frequency that is due to small sampling frequency is 675 Hz.

The proposed sampling frequency is 2f = 120

How to solve for the aliased frequency

The signal frequency that is given in the question is 60Hz

The sampling frequency is 90Hz

a. Using Nyquist frequency,

fn = 0.5*90Hz = 45Hz

The aliased frequency =  |n*fn - fs|

aliased frequency = |n*fn - fs|

We have  n >= 1/Fs = 17ms

Then the aliased frequency is = 17 x 45 - 90

= 675 Hz

b) The Nyquist sampling theorem

In order to avoid aliasing the sampling frequency, this has to be at least two times the highest frequency.

Therefore Fs =

2xF = 120Hz

Read more on sampling frequency here: https://brainly.com/question/25740215

Related Questions

What is the wavelength of a photon with an energy of 3. 38 x 10^-19 j

Answers

The photon has a wavelength of 588 nm

what is a wavelength?

Wavelength is the distance between two points along the path of the wave.

it is usually represented by λ

Energy of a photon, E = ( h c ) /  λ

where:

h is Planck's constant = 6.626 × 10 -34 Js

c is speed of light = 3.0 * 10^8 m/s

λ = ( h c ) / E

λ = ( ( 6.626 × 10 -34 ) * ( 3.0 * 10^8 ) ) / 3.38 * 10^-19

λ = 5.88 * 10^-7 m

λ = 588 * 10^-9 m = 588 nm

λ = 588 nm = 588 nanometers

Read more on photon here: https://brainly.com/question/15946945

Steering and suspension question

Answers

Answer:

I would say only A

Explanation:

steering dampeners are applied to heavy-duty and off-road vehicles in order to help stabilize and balance out your steering in rough terrain. luxury cars won't have them because, well, they are cars, and cars are not used for off-roading. trucks and SUVs and sometimes vans are though, which makes sense more than just a random luxury car with dampeners just sitting there for no reason at all when heavy-duty vehicles need them more than the car.

Construction engineering does not have much to do with design.
True
False

Answers

i’m pretty sure it is false .

Time left 0:35:32 Three steel rod (E = 200 GPa) supports 36 KN Load P. Each of the rods AB and CD has a 200 mm? cross- sectional area and rod EF has 625 mm2 cross-sectional area. C D Compute for the stress in the rod. AB. a. 15.25 MPa b. 38.10 MPa C 19.05 MPa d. 30.50 MPa​

Answers

Answer:

tama po ba

Explanation:

correct me if im wrong

In python

Write an expression that executes the loop body as long as the user enters a non-negative number.

Note: If the submitted code has an infinite loop, the system will stop running the code after a few seconds and report "Program end never reached." The system doesn't print the test case that caused the reported message.

Sample outputs with inputs: 9 5 2 -1
Body
Body
Body
Done.

Answers

Answer:

inputed = input("Choose some numbers, each separated with a space: ")

chosen = list(inputed)

chosen = chosen.remove(' ')

for value in chosen:

if '-' not in value:

print(Body)

else:

print(Done)

break

Explanation:

The for loop will go through every value in the list (your numbers) and check if it is positive or negative.

Give two disadvantages of a moving coil Meter

Answers

1.Only suitable for dc
2.more expensive than moving iron type
3. Easily damaged

does advanced auto parts install engine air filter

Answers

Answer:

You have to do it yourself.

Explanation:

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