Mgl Vega AHRS-1 Manuel utilisateur

Vega AHRS-1

Vega AHRS-3

Vega MAG-1

AHRS-1: Artificial Horizon and Magnetic

Compass indicator

AHRS-3: Self Contained Artificial Horizon,

Magnetic Compass indicator

MAG-1: Magnetic Compass Indicator

perating Manual – English 1.08

Vega AHRS-1 / AHRS-3 / MAG-1 perating Manual Page 2

Introduction

The AHRS-1 / AHRS-3 / MAG-1 is a 2 1/4” (57mm) sunlight rea able color isplay instrument provi ing a isplay for an

artificial horizon reference system (AHRS), an a vance igital compass, or both epen ing on which sensor packages is

connecte .

The AHRS-1 is an attitude display for the external MGL-Avionics SP-7 attitude sensor package. The AHRS-1 re-

quires the MGL-Avionics SP-6 compass sensor package to display heading.

The AHRS-3 is a self contained attitude display with built in sensors. The AHRS-3 does not require the MGL-

Avionics SP-7 sensor package in order to display the attitude, but requires the MGL-Avionics SP-6 compass sen-

sor package to display heading. The AHRS-3 can output CAN bus messages to emulate the MGL Avionics SP7

sensor package.

The MAG-1 is a compass display for the external MGL-Avionics SP-6 compass sensor package.

The AHRS-1 / AHRS-3 / MAG-1 can be setup to isplay the following:

•Compass with optional slip in icator (requires MGL Avionics SP-6 sensor package)

•Horizon with optional slip, turn in icator & G-Force (requires the MGL Avionics SP-7 if using the AHRS-1)

•Turn an bank in icator (requires the MGL Avionics SP-7 if using the AHRS-1)

•Combine compass an horizon isplay with bank in icator, optional slip in icator & G-Force (requires MGL

Avionics SP6 & the Avionics SP-7 if using the AHRS-1)

1 Features

•Large 1.8” high resolution 160x128, wide viewing angle, sunlight readable, 1000 cd/m2 color LC display

• AHRS-1 (Artificial horizon reference system (AHRS) display unit with slip indication, turn and bank and G-

Force indication), requires the MGL Avionics SP-7 sensor packages

• AHRS-3 (Artificial horizon reference system (AHRS) display unit with slip indication, turn and bank and G-

Force indication) complete with built in attitude sensors. The AHRS-3 does not require the MGL Avionics

SP-7 sensor package to display attitude.

• Advanced magnetic compass with heading bug, course steering and slip indication

• Can be setup as an individual compass display, artificial horizon or both

• The AHRS-1 / AHRS-3 / MAG-1 is connected to the AHRS / Compass sensor packages by a simple CAN

bus interface. This allows for the optimum placement of the sensor packages in the aircraft

• More then one AHRS-1 / AHRS-3 / MAG-1 unit can be connected onto the CAN bus. This allows the com-

pass, artificial horizon and the turn and bank indicator to be displayed on different units

• G-Force indicator (MGL Avionics SP-7 required if using the AHRS-1)

• Built in NMEA GPS Viewer

• Automatic or manual magnetic variation calculation

• Sunset and sunrise time display

• Displays time & date, GPS altitude, S G, C G, latitude and longitude when using an external NMEA com-

patible GPS receiver

• Includes a RS232 serial output for interfacing to external equipment e.g dataloggers etc.

• The AHRS-3 can output CAN bus messages to emulate the MGL Avionics SP7 sensor package.

• Standard 2 1/4” (57mm) aircraft enclosure (can be front or rear mounted)

• Rotary control plus 2 independent buttons for easy menu navigation and user input

• An external output activates when an alarm condition has been reached

• Wide input supply voltage range of 8 to 30V DC with built in voltage reversal and over voltage protection

for harsh electrical environments

• 1 year limited warranty

Vega AHRS-1 / AHRS-3 / MAG-1 perating Manual Page 3

2 Layout

2.1 AHRS-1 / AHRS-3 Layout

2.2 MAG-1 Layout

F2 / Down Button:

Menu System: Softkey button

Fast level function

Sunlight readable color

graphic display:

Backlight can be a juste in the

menu system

Rotary Control (Up/Down) & Enter Button:

Press the rotary control uring the normal isplay screens to access the menu system.

Rotate anti/clockwise for up/ own menu scrolling. During normal mo e turning the rotary control

anti/clockwise will scroll through the main isplays (Artificial horizon, compass an turn an bank

in icator).

F1 / Up Button:

Menu System: Softkey button

Pitch level function

2 1/4” (57mm) enclosure.

Can be front or rear mounte

Rotary Control (Up/Down) & Enter Button:

Press the rotary control uring the normal isplay screens to access the menu system.

Rotate anti/clockwise for up/ own menu scrolling.

F1 / Up Button:

Menu System: Softkey button

Enable coarse steering isplay

F2 / Down Button:

Menu System: Softkey button

Enable the reverse coarse isplay

2 1/4” (57mm) enclosure.

Can be front or rear mounte

Sunlight readable color

graphic display:

Backlight can be a juste in the

menu system

Vega AHRS-1 / AHRS-3 / MAG-1 perating Manual Page 4

3 Main Displays

The AHRS-1/3 can be set up to show 5 ifferent isplay screens. Turning the rotary control either clockwise or anti-clock-

wise allows you to select the operation of the AHRS-1 / AHRS-3 as an artificial horizon with mini compass an turn an

bank in icator, a turn an bank in icator, a igital compass, or as a NMEA GPS viewer

The MAG-1 only isplays the compass an GPS isplays.

Note: If you have purchase the artificial horizon an compass sensor packages with two or three AHRS-1 / AHRS-3 /

MAG-1 isplays, it is possible to setup either of the units to isplay either the artificial horizon, turn an bank in icator or

the compass.

3.1 Artificial Horizon with Compass

Pitch level function

Shoul your aircraft fly “nose up” or “nose own” ue to trim, then you can press the F1 key to level the pitch as isplaye

on the horizon.

3.2 Turn and Bank Indicator

Slip indicator

A “step on the ball” slip in icator can be enable to appear below the horizon an compass isplays. The source of infor-

mation for this in icator is erive from the accelerometer aligne with the pitch axis of the aircraft, i.e. the acceleration

forces acting in the irection of the wings.

G-Force isplay

10 egree pitchbars

5 egree pitchbars

Slip in icator can be turne on or off in the menu system

Estimate Horizon

Magnetic or true hea ing rea ing

(compass can be switche off

in the menu system)

Mini turn an bank in icator

(can be switche off in the

menu system)

Slip in icator

Marker escription

Vega AHRS-1 / AHRS-3 / MAG-1 perating Manual Page 5

Fast level function

Press the F2 key shoul the horizon isplay be topple (i.e. in icating incorrectly by a large amount) ue to excessive

maneuvering or by excee ing the maximum bank, pitch or yaw rates. This will in icate to the instrument that you are fly-

ing straight an level an that gravity tracking may be accelerate to ensure rapi realignment of the horizon.

Extended range of operation

Please see the correspon ing MGL sensor ocumentation for maximum rate specifications.

Depen ing on con itions maximum rates may reach 180 egrees per secon . No caging of the electronic gyro system is

require uring excessive maneuvering, unlike systems base on mechanical gyros. Simply correct the horizon when you

are finishe or let the horizon right itself which will happen uring straight an level flight.

Message isplaye when the maximum bank, pitch or yaw rates have been excee e

3.3 Digital Compass

3.3.1 Compass Tape

The igital compass tape can be isplaye in 3 ifferent ways. The way the compass is isplaye can be setup in the

menu system un er “COMPASS SETUP”

Numeric compass display

The hea ing tape shows hea ings as numbers in egrees.

Mixed compass display

The hea ing tape shows hea ings as number in egrees except for the four major

car inal points which are shown as N, S, E an W.

Cardinal compass displayThe hea ing tape shows hea ings as major an

interme iate car inal points: N, NE, E, SE, S, SW, W an NW.

Magnetic (M) or true

(T) North in icator

Slip in icator can be turne on or off in the menu system

Course steering In icator

Vega AHRS-1 / AHRS-3 / MAG-1 perating Manual Page 6

3.3.2 Heading bug and the course steering indication

To activate the hea ing bug, press the F1 key when the compass isplay is showing.

Press the F1 key again to use the current hea ing as the hea ing bug or use the rotary

control to manually enter a hea ing. Press the F2 key if you want to switch the hea ing

bug off.

The hea ing bug set to 176 egrees. Currently the hea ing equals the course to steer as

shown below the hea ing tape. No course steering in icators are shown.

The current hea ing is 169 egrees; course steering in icators show the nee to steer

slightly to the right to intercept the course.

The current hea ing is 218 egrees; course steering in icators show that a large

correction to the left is require to intercept the course.

Each “>” or “<” equals 2 egrees of hea ing error. To cancel the course steering function, simply press the F1 key again.

3.3.3 The reverse course (from heading) display

Press the F2 key to activate the reverse course isplay. This isplay remains active for

about 5 secon s before reverting back to the normal hea ing isplay.

Vega AHRS-1 / AHRS-3 / MAG-1 perating Manual Page 7

3.3.4 Heading stability issues

You may fin short term fluctuations of the hea ing occurring. These ten to be very small an are typically less than one

egree. This coul still cause the hea ing to fluctuate occasionally by a single egree. These fluctuations occur naturally

in the earth’s magnetic fiel an can also be cause by nearby electrical equipment such as ra ios, lamps, electronic in -

strumentation or computers, even the ignition systems of engines. The AHRS-1/3 / MAG-1 has a compass filter setting

which can be set to filter out some of these small fluctuations.

3.4 GPS Viewer

These isplay are active when a NMEA compatible GPS receiver is connecte to the serial port.

The following GPS information is isplaye :

•Time an ate

•Latitu e an Longitu e

•Magnetic variation

•Sunrise an Sunset times

•GPS altitu e

•SOG (Spee over groun )

•COG (coarse over groun )

•GPS fix

Vega AHRS-1 / AHRS-3 / MAG-1 perating Manual Page 8

4 Menu System

Press the rotary control button uring the normal isplay mo e to enter the menu system. Use the rotary control to navi-

gate through the menu system.

4.1 Exiting the menu system

Press the F1/Up button to exit the menu system when the “EXIT” soft key is shown. All changes ma e uring navigation

of the menu system will be save in non-volatile memory upon exiting. The instrument will not save any changes if you re-

move power before exiting the menu system.

Vega AHRS-1 / AHRS-3 / MAG-1 perating Manual Page 9

4.2 Horizon Setup

Compass:

Select “ON” if you woul like to see the compass box on the horizon isplay.

Numeric:

Select “ON” if you woul like to see a numeric isplay of bank an pitch angles superimpose on the horizon isplay.

G-Force:

Select “ON” if you woul like to see the G-Force isplaye on the horizon isplay.

Ground :

Select the groun color of the horizon. A selection between "BROWN" ( efault) or "GREEN" can be ma e.

Turn:

Select whether you want the turn in icator to be shown on the horizon isplay screen.

Turn Rate:

Select whether you want the turn an bank in icators to show a 1 min/rotation or 2 min/rotation turn.

Slip:

Select if you woul like to enable the slip in icator to be shown un erneath the horizon isplay. The slip in icator oper-

ates in the same fashion as the well known “step on the ball” in icator in tra itional cockpits.

Note: The slip in icator is always enable in the turn an bank in icator mo e.

Vega AHRS-1 / AHRS-3 / MAG-1 perating Manual Page 10

Slip Sense:

Select if you want the slip to have a high sensitivity or a low sensitivity setting.

Slip Zero:

This function allows you to set your slip in icator to exactly zero even if your aircraft ten s to fly slightly wing own. The

proce ure is to place the aircraft in a stable, straight an level attitu e uring calm flight con itions an then select this

function. To cancel the correction, place your sensor absolutely horizontal (use a spirit level) an select the function

again.

Speed Unit:

Select the spee unit.

Speed:

Enter the cruising spee of your aircraft. This spee is transmitte to the attitu e sensor for ai ing purposes if the GPS

spee is not available.

Pitch Marker:

This enables or isables the pitch markers on the horizon isplay.

CAN Address:

Select the CAN a ress of the SP-X attitu e sensor.

Couple Coe (AHRS-3 only):

This is a number from 1 to 10. “1” is the efault.

This number etermines how “strongly” the AHRS will force the gyro erive horizon estimate to coinci e with that of the

accelerometer base level calculations which are base on gravity.

“1” causes a very slow correction. This is the normal state an use most often.

“10” is the highest correction spee . This is usually use if the AHRS is use in unfavorable con itions.

Backgroun :

Gyros can only tell you if you are rotating aroun any axis (you have three of them). Gyros cannot tell your attitu e, they

can only tell you how your attitu e is changing.

Accelerometers can tell you your attitu e – but only if you are not accelerating. That inclu es a turn as this involves accel-

eration (constant change of irection). In a ition accelerometers will react to any movement of your aircraft cause by

turbulence etc.

So – basically accelerometers can sometimes tell you your attitu e while gyros can tell you how your attitu e has

change – but with errors as measurements are never 100% accurate – so the longer you rely only on the gyros the

worse it gets.

To a large extent the AHRS can estimate accelerations acting on your aircraft as it knows the aircraft's velocity. This

means it can estimate a reasonably vali attitu e from the accelerometers that is “noisy” even in accelerate flight. For

this to be possible it has to assume how your aircraft moves through space. So it is mostly correct but sometimes not.

The coupling coefficient allows you to tra e between the two.

Usually a panel mounte AHRS is affecte by vibrations from engines (gyros on't like vibrations). This is the largest error

source for a typical AHRS. If your installation suffers from that a higher coupling number may assist as gyro errors are

larger than normal.

If this oes not help you will have to either try an re uce vibrations affecting the panel or install an external AHRS like

the SP-7 or high gra e SP-9. This allows locating the AHRS in a more suitable an protecte area. If the AHRS-4 etects

an external AHRS it will automatically use it. External AHRS is connecte onto the CAN bus.

Ce manuel convient aux modèles suivants

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