Which of the following is true with respect to flexure pivot accelerometers? - Avionics MCQ

Aeronautical & Aerospace Engineering : Avionics - Quiz(MCQ)

Which of the following is true with respect to flexure pivot accelerometers?

A)

Unbalanced accelerometer type

B)

Torquer coil current measures the acceleration

C)

Flexure must provide maximum resistance in the direction of input axis

D)

Flexure must provide maximum resistance in the direction other than input axis

Correct Answer : Flexure must provide maximum resistance in the direction of input axis

Explanation : The pivot or flexure supporting the pendulum must provide minimal restraint for the pendulum in the direction of the input axis while exhibiting high stiffness in the other two directions. The spring constant of the flexure or pivot generates a restoring force that reduces the gain of the electronic restoring loop.

Recently Updated in Avionics Questions

Why is the gyro and accelerometers shock mounted to the body?

A)

Reduce drift error

B)

Impact protection

C)

Limit vibration errors

D)

Prevent voltage surges

Correct Answer : Option (C) : Limit vibration errors

Explanation : The gyros and accelerometers are rigidly mounted on a block with temperature sensors. The block is usually shock mounted to the vehicle to control the bandwidth of the motion sensed at the instruments. Shock mounting limits vibration rectification errors within the errors themselves.

Pre-processing algorithms are also called as ________

A)

Resolution algorithm

B)

Coning algorithm

C)

Differential algorithm

D)

Error control algorithm

Correct Answer : Option (B) : Coning algorithm

Explanation : Pre-processing the gyro data at a higher rate than the quaternion iteration improves the approximation in the vector change in angle in order to follow the actual motion of the rotation axis closely. The pre-processing algorithm is also called as coning algorithms.

Which of the following is false with respect to gimballed platform?

A)

Protect the instruments from large angular motion

B)

Euler angles are not easily readable from the gimbals

C)

Protection from vibration, temperature and magnetic effects

D)

Orients the accelerometers into a coordinate frame relative to Earth

Correct Answer : Option (B) : Euler angles are not easily readable from the gimbals

Explanation : One of the main purposes of gimballed system is to provide a convenient readout of vehicle attitude by reading each of the gimbals angles separately, thereby yielding convenient Euler angle outputs.

Advertisement