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: | Proj.Doc/Technical Report (Technical Report) |
|---|---|
| Uncontrolled Keywords: | Control System Digital Techniques Pitch Damping Measurement |
| Subjects: | AERONAUTICS > Aeronautics (General) |
| Division/Department: | National Trisonic Aerodynamic Facility |
| Depositing User: | M/S ICAST NAL |
| Date Deposited: | 03 Dec 2012 11:24 |
| Last Modified: | 03 Dec 2012 11:24 |
| URI: | http://nal-ir.nal.res.in/id/eprint/10907 |
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