Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
34 Cards in this Set
- Front
- Back
|
Velocity
|
-The result of acceleration when integrated, with respect to time
|
|
|
Gyroscope
|
-A mechanical device containing a spinning mass universally mounted so it can assume any position in space
|
|
|
Gyrosope components
-Rotor |
-A heavy wheel mounted so its spin axis is free to turn in any direction and can assume any position in space
|
|
|
Rigidity
|
-The ability of a gyro to keep its axis fixed in space
|
|
|
Factors effecting Rigidity
|
-Rotor Weight
-Weight Distribution -Rotor Spin Speed |
|
|
Precession
|
-The rotation of the spin access of a gyro in response to an attempt to move its spin access
-The direction of precession is always PERPENDICULAR to the direction of the applied force |
|
|
The direction of precession will be 90 degrees... and...
|
-clockwise from the applied force if the rotor is spinning clockwise
-counterclockwise if the rotor is spinning counterclockwise |
|
|
Forefinger points in direction of...
|
-spin vector
|
|
|
Degrees of freedom
|
-number of axiis the rotor is free to precess
|
|
|
A gyroscope with 2 gimbil rings has... and is considered...
|
-2 degrees of freedom
-universally mounted |
|
|
Newton's 2nd Law
|
-Acceleration is proportional to the resultant force and is in the same direction as this force
|
|
|
The purpose of an INS
|
-to keep track of present position
|
|
|
The INS continuously measures aircraft accelerations to compute...
|
-Aircraft velocity and change in present position
|
|
|
INS measurements are made by...
|
-precision inertial devices mounted on a 3-axis stable element which is part of a 4 gimbil structure
|
|
|
Acceleration due to gravity can be eliminated by placing the...
|
-accelerometer on the 3-axis stable platform
|
|
|
Alpha Angle
|
-Alpha is the angular difference between Platform Heading and True North
|
|
|
Schular Tuning
|
-The method used to maintain the stable platform in a horizontal position relative to the Earth's surface
|
|
|
Kalman Filtering
|
-The method used to align an INS
|
|
|
INS outputs
|
-Pitch
-Heading -Acceleration |
|
|
Power Supply
|
-Provides regulated and unregulated operating voltages
|
|
|
Platform Assembly
|
-Provides sensors to detect aircraft acceleration and altitude
|
|
|
Platform components
|
-4 Gimbils
-3 Accelerometers -2 Gyros |
|
|
Digital Computer
|
-A GENERAL PURPOSE 24-BIT PARALLEL FRACTIONAL MACHINE used to perform integration of platform signals to obtain aircraft velocity, distance traveled, and THE MONITORING OF SYSTEM DISCRETES FOR MALFUNCTION DISPLAY
|
|
|
Air Data Computer
|
-Provides barometric altitude, true air speed, and magnetic heading to INV
|
|
|
Mission Computer
|
-Performs user input of present position, elevation, and magnetic variation data to the INS
|
|
|
Gyro Bias
|
-The on-aircraft calibration mode for INS
|
|
|
INS Mode Switch - GND
|
-WP6 P2
|
|
|
Setting the INS mode switch to any operating mode produces an... which initiates the...
|
-on/off discreet
-turn on sequence |
|
|
GND Alignment PUB location
|
-WP12 P2 Para4
|
|
|
Ground Alignment starts when the INS switch is set to...
|
-GND
|
|
|
After reset...
|
-the digital computer initializes the program
-the platform is heated -the gyros are spun up -a COURSE LEVEL is performed |
|
|
If the PARK BRK is not set...
|
-The INS produces an aligned hold signal
|
|
|
When the parking break is reset...
|
-the INS waits 20 seconds for motion to stop and then continues the align sequence
|
|
|
Alpha Angle is added with the platform heading to produce...
|
-INS True Heading
|
