A Improved Control System Using Digital Technology For A Wind Tunnel Forced – Oscillation Rig.

Prasada Rao, K (1991) A Improved Control System Using Digital Technology For A Wind Tunnel Forced – Oscillation Rig. Technical Report. NAL, Bangalore.

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Abstract

A Improved Control System For A Forced-Oscillation Rig For Measurement Of Pitch/Yaw Damping Derivatives In The NAL 1 .2m Derivatives Wind Tunnel Has Bee Designed And Developed. The Basic Principles Of The System Are Similar To Those Of A Existing Control System Developed For The Same Forced-Oscillation Rig. The Present System In Corporate Certain Features Such As The Use Of Digital Techniques For Fine Tuning And Automatic Switching Of Phase Tracking Control From Closed-Loop To Open-Loop Mode Operation . These Features Facilitate Testing. Even When The Model Is Subject, To Relatively Large Random Disturbances Due Either To Large Flow U Steadiness A D/Or Separated Flow Over Model Occurring At High Incidences. Performance Of The Control System Was Evaluated Initially In Bench Tests .The System Was Later Successfully Employed For Pitch-Damping Measurements at Mach Numbers up To 3 .T3 In The NAL 1 .2 Transonic Blowdown Tunnel.

Item Type: Monograph (Technical Report)
Uncontrolled Keywords: Control System Digital Techniques Pitch Damping Measurement
Subjects: AERONAUTICS > Aeronautics (General)
Depositing User: Users 90 not found.
Date Deposited: 03 Dec 2012 05:54
Last Modified: 03 Dec 2012 05:54
URI: http://nal-ir.nal.res.in/id/eprint/10907

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