Development and Operation of an Automatic Rotor Trim Control System for the UH-60 Individual Blade Control Wind Tunnel Test

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Abstract:

An automatic rotor trim control system was developed and successfully used during a wind tunnel test of a full-scale UH-60 rotor system with Individual Blade Control IBC actuators. The trim control system allowed rotor trim to be set more quickly, precisely and repeatably than in previous wind tunnel tests. This control system also allowed the rotor trim state to be maintained during transients and drift in wind tunnel flow, and through changes in IBC actuation. The ability to maintain a consistent rotor trim state was key to quickly and accurately evaluating the effect of IBC on rotor performance, vibration, noise and loads. This paper presents details of the design and implementation of the trim control system including the rotor system hardware, trim control requirements, and trim control hardware and software implementation. Results are presented showing the effect of IBC on rotor trim and dynamic response, a validation of the rotor dynamic simulation used to calculate the initial control gains and tuning of the control system, and the overall performance of the trim control system during the wind tunnel test.

Author(s):
Theodore, Colin R. ; Tischler, Mark B.
Author Organization(s):
ARMY RESEARCH DEVELOPMENT AND ENGINEERING COMMAND MOFFETT FIELD CA AVIATION AEROFLIGHT DYNAMICS DIRECTORATE
Descriptive Note:
Conference paper
Supplementary Note:
Presented at the American Helicopter Society Aeromechanical Specialists' Conference Held 20-22 Jan 2010 in San Francisco, CA.
Pagination:
0023

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Monitor Series:
RDECOM/AADD
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_1.1_Force Management; JCA_1_Force Support; JCA_6.1.3_Switching and Routing; JCA_6_Net Centric; JCA_6.1.1_Wired Transmission; JCA_6.1_Information Transport; JCA_5.3_Planning; JCA_6.3.3_Spectrum Management; JCA_4.3_Maintain; JCA_4.6_Engineering; JCA_6.3_Net Management; JCA_8_Building Partnerships
Communities of Interest:
Air Platforms
Descriptor(s):
*ROTORS, *HELICOPTERS, *WIND TUNNEL TESTS, SYMPOSIA, CONTROL SYSTEMS, DYNAMICS, DYNAMIC RESPONSE, AIR FLOW, WIND, BLADES, CONSISTENCY, DRIFT, ACTUATORS, VIBRATION, WIND TUNNELS, COMPUTER PROGRAMS, REQUIREMENTS
Field(s)/Group(s):
Helicopters, Test Facilities, Equipment and Methods
Keyword(s):
UH 60 AIRCRAFT
Report Date:
2009 Jan 01
Creation Date:
2010 Oct 06