<div><span style="color: #ffffff;"><strong>PoliSpace CubeSat Team - AOCS Test</strong></span></div> | Take the Quiz

Turn on the full-screen mode, the quiz will begin in the next page!

For each question you will have 30 seconds.

After that time the quiz will skip to the following question.

The time bar is shown below the question.

GOOD LUCK!

Why a 4th Reaction Wheel (RW) is usually added to the usual 3-axis configuration?

To reduce total power needed by the RWs set

To add redundancy in case of failure of one of them

To perform de-saturation maneuvers more frequently

To increase pointing accuracy

Which of these are valid combinations of sensors and actuators for a 3-axis control in an equatorial LEO (Low Earth Orbit)?

Star Trackers + Magnetic Rods

Sun Sensors + Magnetic Rods

Star Trackers + Reaction Wheels

Horizon Sensor + RCS Thrusters

Which of these are possible attitude parameters?

Quadrions

PCB matrix

Schmidt vector

Euler angles

Why the kernel/null-space is used in the RCS thrusters?

To improve the asymptotic stability of the response

To have the required control action avoiding negative thrust

To reduce propellant consumption

To increase accuracy in the effective control torque

Which are the disadvantages of a fixed horizon sensor?

Impossibility to measure angular rates around the nadir axis

Higher power requirements with respect to other sensors

It can be used only for equatorial orbits

The planet atmosphere disturbs the detected infrared signal

What is the expected SRP (Solar Radiation Pressure) disturbance torque along one orbit for an inertial pointing satellite in a polar Earth orbit?

Constant in time

Periodic with changing amplitude

Periodic with constant amplitude

Linearly increasing with time

Which are the actuators usually used for spacecraft de-tumbling?

Reaction Wheels

Star Trackers

Magnetic Rods

Control Moment Gyroscopes

Which sensor has the slowest update rate?

Gyroscope

Magnetometer

Reaction Wheel

Star Sensor

Which propulsion system you would select for a deep-space interplanetary CubeSat?

Hybrid Rocket Motor

Hydrazine Monopropellant

Ion Thruster

Resistojet

Which of these sentences regarding a hybrid rocket motor is FALSE?

The regression rate is slower than in solid rockets

They can be miniaturized easily

During combustion the oxidizer/fuel ratio can change

The handling of the propellants is safer

PoliSpace CubeSat Team - AOCS Test

More Quizzes