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A five‐component strain gauge wind tunnel dynamometer
Author(s) -
MOLLAND A. F.
Publication year - 1978
Publication title -
strain
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.477
H-Index - 47
eISSN - 1475-1305
pISSN - 0039-2103
DOI - 10.1111/j.1475-1305.1978.tb00258.x
Subject(s) - rudder , dynamometer , strain gauge , calibration , engineering , instrumentation (computer programming) , component (thermodynamics) , wind tunnel , bridge (graph theory) , structural engineering , marine engineering , mechanical engineering , aerospace engineering , computer science , physics , medicine , quantum mechanics , thermodynamics , operating system
The design, construction and calibration of a five‐component dynamometer is described. The dynamometer was constructed primarily for the testing of ship control surfaces including, in particular, skeg rudders; it has facilities for the independent adjustment of angle of attack, and the derivation of the forces and moments, on both rudder and skeg. An outline of the specialised design requirements is given. The basic design concept is described together with the reasons for the choice of shear flexures and their dimensions, strain gauges, circuits, bridge voltages and instrumentation. Following a brief description of the calibration rig and programme, the calibration results and origins of interactions are described and discussed. It is concluded that the relatively small size of the interaction corrections and overall measuring accuracy of the dynamometer confirm the choice of the overall design concept and design details.