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標題: 陀螺儀也有山寨機 [打印本頁]

作者: sanjose 時間: 2009-3-2 03:14
標題: 陀螺儀也有山寨機
GY401 也有山寨機

COLCO GY400 AVCS Rate Gyro

for helicopter

Specification:

Control System :	Digital advanced PI (Proportional Integration) Control
Gyro sensor:	SMM system vibration gyro (Silicon Micro Machine)
Operating voltage:	+4 to +6VDC
Operating temperature range:	-10 degree to +45 degree
Function:	Gyro operation direction switch, DS mode switch, Control delay trimmer, Limit trimmer Remote gain control, AVCS/normal mode switching
Dimensions:	21.8 X 21.8 X 19.00mm
Weight:	15g (including connector)
Package Weight:	~65g

Features:
AVCS system
Since rudder trim changes caused by wind and other meteorological changes and front, rear, forward, reverse, and other helicopter attitude changes are automatically cancelled, tail (rudder) operation is easy, making it perfect for 3D flight.

SMM gyro sensor
Use of newly developed extremely low drift SMM(Silicon Micro Machine) gyro sensor virtually eliminates rudder trim changes during flight.

Integrated, compact, and lightweight
Compact size (21.8x21.8x19.0mm) and light weight (15g) realized by high density mounting technology.

Conductive resin case
Conductive resin case improves EMC (electrostatic and electromagnetic interference) resistance.

AVCS Gyro
Conventional gyros send control signals to the rudder servo only when the tail of the helicopter moves. When the tail stops moving, the control signal from the gyro becomes zero. Conversely, the AVCS gyro continues to send control signals to the servo even when the helicopter stops moving. The following sequentially describes the conventional gyro and the AVCS gyro.

Operation of AVCS Gyro
Basic operation is described by considering the case when the helicopter is hovering under cross-wind conditions. With a conventional gyro, when the helicopter encounters across-wind, the force of the cross-wind causes the tail of the helicopter to drift. When the tail drifts, the gyro generates a control signal that stops the drift. When the tail stops drifting the control signal from the gyro becomes zero. If the cross-wind continues to cause the tail to drift in this state, the "stop'' operation is repeated until the tail faces downwind. This is called the "weathervane" effect.

Operation of AVCS Gyro
Conversely, with an AVCS gyro, when the helicopter encounters a cross-wind and the tail drifts, a control signal from the gyro computes the drift angle and constantly outputs a control signal that resists the cross-wind. Therefore, drifting of the tail can be stopped even if the cross-wind continues to effect the helicopter. In other words, the gyro itself automatically corrects(auto trim) changes in helicopter tail trim by cross-wind. Considering operation of an AVCS gyro, when the tail of the helicopter rotates, the servo also rotates in accordance with angle of rotation of the tail. When the tail stops rotating, the servo judges that it has stopped in that position. This is the auto trim function.
Item Included:
colco GY400 Head Lock Gyro
English User Manual

作者: dinny5526 時間: 2009-3-2 08:16
有人試過嗎...........