Futaba GYA352 - Manual

• No part of this manual may be reproduced in any form without prior permis-
sion.
• The contents of this manual are subject to change without prior notice.
• This manual has been carefully written. Please write to Futaba if you feel that
any corrections or clarifications should be made.
Thank you for purchasing a GYA352 AVCS gyro.
Before using your new gyro, please read this manual thoroughly and
use the gyro properly and safely. After reading this manual, store it
in a safe place.
1M23N07408
F
OREWORD
1
The GYA352 is a high performance, compact, and light weight
AVCS gyro developed for model airplane aileron, elevator, or
rudder control. Two of these surfaces (axis) can be controlled by
GYA352. Integrated sensor and control circuit simplifies mounting
in the aircraft.
Servos :
Gyro performance largely depends on the servo used. The faster and
more responsive the servo, the higher the speed and the better the
sensitivity and performance of the gyro.
Features
•Two axis control type (X-axis/Y-axis)
Two axis of aileron, elevator or rudder can be simultaneously
controlled by GYA352. ( For aileron, always use X-axis.)
•Built-in gyro mixing for Elevon/V-tail wing
•AVCS used
Forward, climb, descent, back, knife edge, and other flying attitudes are main-
tained even when the wind shifts. Therefore, since meeting rudder is almost
completely unnecessary, flying is easy. At the same time, the gyro automatically
corrects bad tendencies of the aircraft.
•SMM gyro sensor
Newly developed very low drift SMM (Silicon Micro Machine) gyro sensor
practically eliminates trim changes during flight.
•Remote gain and mode switching functions
Remote gain function lets you switch the gyro gain from the transmitter. AVCS
mode/Normal mode/Gyro OFF can also be switched from the transmitter.
•Integrated type, compact size, and light weight
Compact size (43x30x30.5mm) and light weight (49.5g) have been achieved by
the use of high density mounting technology.
•Conductive resin case improves EMC resistance (electrostatic, electro-
magnetic wave interference).
S
ET
C
ONTENTS
2
•GYA352
•Double-sided tape
(3 sheets)
The GYA352 comes with the following
accessories:
•Mini screwdriver
(for adjustments)
GYA352 Ratings :
(Integrated sensor / two axis control type AVCS rate gyro)
• Control system: Digital advanced PI (Proportional Integration) control
• Gyro sensor: SMM (Silicon Micro Machine) system vibration gyro
• Operating voltage: +4 to +6VDC
• Dimensions: 43 x 30 x 30.5mm
• Weight: 49.5g (including connector)
• Functions: Gyro operation direction switch, Mixing switch, Gyro gain
trimmer, and Control gain trimmer
N
AME AND
F
UNCTION OF
E
ACH
P
ART
3
•Monitor LED
Monitors the operating status of the GYA352. See
the table below for the display contents.
•Servo output connector
Connects the corresponding servo.
(X-axis output/Y-axis output)
(Monitor LED display)
LED display Gyro operation status
Rapid flashing Displayed while data is being initialized at power ON. (green)
Steady light Shows that the gyro is operating in the AVCS mode.
Off Shows that the power is OFF, or the gyro is operating in the Normal
mode.
Slow flashing Displayed when a control signal is not input from the transmitter.
Double flash In the AVCS mode, displayed when the signal from the transmitter
deviates from the neutral signal memorized at the gyro. Also displayed
when a stick is operated.
Single flash Displayed when the AVCS function is reset, and a neutral signal is sent
to the servo. The LED flashes once when the gain selector switch was
quickly switched between the Normal and AVCS positions three or
more times and then left in the AVCS position, or when a transmitter
stick was quickly moved to the left and right three or more times. After
this display is performed, the servo moves to the neutral position. This
display also flashes when the control selector switch was moved.
GYA352 operation modes
The GYA352 has two operations modes: AVCS mode and Normal mode.
Normal mode:
This mode performs general proportional control operation. For instance, it controls the gyro so that
changes are countered when the attitude of the aircraft is changed by cross-wind, etc.
AVCS mode:
This mode performs both proportional and integrated control operation. The difference between
Normal mode and AVCS mode operation is that whereas the Normal mode only counters changes in
attitude, the AVCS mode returns to the original controlled variable simultaneously with countering
changes in attitude. For example, during knife edge flying, aileron and elevator meeting rudder is
normally necessary, but in the AVCS mode, meeting rudder is performed automatically by the gyro.
Also, in the AVCS mode, high-speed control is possible, but when the usage method is incorrect,
unintended operation may be performed. Before use, gain a thorough understanding by reading the
Usage Precautions and Operation Instructions.
I
NSTRUCTION
M
ANUAL
Rate gyro for models
AVCS R
ATE
G
YRO
•Red; X-axis operation, Green; Y-axis operation, Orange; (simultaneous)
•Mixing on/off switch (ALV)
Turns on or off the gyro mixing for Elevon/V-tail wing. When using the gyro mixng, this switch is set to the
ON position. When not using the gyro mixng, this switch is set to the OFF position.
•Control selector switch (CNT.X)
Selects to match the flight control surface to be controlled (X-axis side). When using the GYA352 to
control the ailerons, this switch is set to the AIL position. When using the GYA352 to control the elevator
or rudder, this switch is set to the ELV position.
•Gyro direction of operation selector switch (DIR.X, DIR.Y)
Selects the direction of operation of the gyro. If the rudder moved when the fuselage was moved in the
gyro control axis direction and the rudder moved to cancel this movement, the direction of operation is
matched. If the aircraft is flown while the direction of operation is wrong, the gyro may apply reverse
rudder and is very dangerous.
•Gain switching connector (remote gain input)(red)
Gyro gain switching signal input connector. Connects to the receiver gain switching channel
output connector. The signal from this connector is also used to switch the AVCS and Normal
operation modes simultaneously with gain switching. Since this connector is a single signal
wire, do not pull on it forcefully.
(X-axis connector/Y-axis connector)
•Servo input connector
(black)
Connects to the corresponding servo
output connector of the receiver.
(X-axis connector/Y-axis connector)
•Gyro Gain trimmer (G GAIN)
Adjusts the gyro gain. Adjust the gain to the maximum value at which hunting does
not occur. The gain becomes “0” in the center. When Gain Switching connector is
connected in the receiver, the gain adjustment is made from the transmitter. In this
case, adjust within the “A” side. The value set with this trimmer becomes the
reference. The gain can be adjusted by changing the servo deflection angle
setting of the transmitter gain adjustment channel. When the gain adjustment is
made only this trimmer, adjust within the “N” side. In this case, the gyro operates
in the normal mode only.
(X-axis trimmer/Y-axis trimmer)
•Control Gain trimmer
(C GAIN)
Adjusts the steering signal controlled
variable. The effect of the rudder when
the gyro is turned on can be adjusted.
When the trimmer is turned clockwise,
the controlled variable increases.
(X-axis trimmer/Y-axis trimmer)