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ANALOG ERROR SIGNAL [4 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2010-12-02

English

Subject field(s)
  • Flight Instruments and Equipment (Aeroindustry)
  • Aircraft Piloting and Navigation
  • Navigation Instruments
CONT

The gyros are used to maintain the platform’s inertial orientation by sensing rotations of the platform caused by vehicle-rotation-induced friction at the gimbal pivot points ... One gyro - called the vertical gyro - is oriented so its input axes are aligned with the X and Y platform axes; its input axes provide IMU [Inertial Measurement Unit] platform roll and pitch stabilization. The second gyro is oriented so that one input axis lies along the platform’s Z axis and the other lies in the X-Y plane. This gyro - the azimuth gyro - provides platform yaw stabilization with the Z input axis, while the second input axis is used as a platform rate detector for built-in test equipment.

CONT

The sensors for angular velocity are vibrating gyroscopes(3 axes, to detect rotation and pitch/roll pendulations of the payload). An error signal is obtained differencing the signal from the azimuth gyroscope and a constant level settable from the telemetry, which controls the speed of rotation. Such error signal drives an analog PID [Proportional Integral Differential] circuit; the output of the PID is connected to the PWM [Pulse Width Modulation] driver supplying current to the pivot azimuth motors.

CONT

azimuth gyro: term used at Natural Resources Canada - Earth Sciences Sector.

PHR

Azimuth gyro drift rate.

French

Domaine(s)
  • Instruments et équipement de bord (Constructions aéronautiques)
  • Pilotage et navigation aérienne
  • Instruments de navigation
CONT

La plate-forme stabilisée [...] Trois gyroscopes sont utilisés : (a) Un gyroscope d'azimut qui, n'ayant aucun degré de liberté dans l'axe vertical, détecte tout déplacement de la plate-forme en azimut. (b) Deux gyroscopes d'inclinaison [...]

OBS

gyroscope d'azimut : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

PHR

Vitesse de dérive du gyroscope d'azimut.

Spanish

Save record 1

Record 2 2010-07-27

English

Subject field(s)
  • Computer Mathematics
  • Telecommunications
DEF

An error caused by conversion of a variable having a continuous range of valves to a quantized form having only discrete valves, as in analog-to-digital conversion. The error is the difference between the original (analog) value and its quantized (digital) representation.

CONT

The ideal resolution of these converters is equal to the value of the LSB or 2-n for an n-bit converter. For A-D converters, associated with this resolution is an inherent quantization error, which reflects an uncertainty in the results of A-D conversion due to quantification of the analog signal.

French

Domaine(s)
  • Mathématiques informatiques
  • Télécommunications

Spanish

Campo(s) temático(s)
  • Matemáticas para computación
  • Telecomunicaciones
Save record 2

Record 3 1998-08-17

English

Subject field(s)
  • Electronic Components
  • Telecommunications Facilities
DEF

An array of switches with a common output connection for selecting one of a number of analog inputs. The output signal follows the selected input within a small error.

Key term(s)
  • analogue multiplexer

French

Domaine(s)
  • Composants électroniques
  • Installations de télécommunications

Spanish

Campo(s) temático(s)
  • Componentes electrónicos
  • Instalaciones de telecomunicaciones
Save record 3

Record 4 1989-06-27

English

Subject field(s)
  • Artificial Intelligence
  • Information Processing (Informatics)
CONT

The representation of a general pulse transmission system is given in Figure 8. 1. Here, the information input to the system is encoded in some sense.... This encoded signal drives the modulator, which maps the pulse sequence into an analog wave suitable for transmission over the channel.... At the receiving end, the demodulator maps the received analog waveform into a pulse sequence that is a "best guess" of the sequence transmitted. The decoder operates on the binary sequence to extract the information originally impressed on the encoder. The overall objective is to transfer the information from the input to the output within some a priori specified low error rate, where the error rate is the average number of disagreements per unit of time between the inputs and the outputs.

French

Domaine(s)
  • Intelligence artificielle
  • Traitement de l'information (Informatique)
OBS

Système de traitement de l'information par transmission d'impulsions.

Spanish

Save record 4

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