Upgrade Of A Labview Based Data Acquisition System For Wind Tunnel Test Of A 1 10 Scale Oh 6a Helicopter Fuselage PDF Download
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| Author | : Philipp A. Lines |
| Publisher | : |
| Total Pages | : 99 |
| Release | : 2003-06-01 |
| Genre | : |
| ISBN | : 9781423501138 |
Download Upgrade of a LabVIEW Based Data Acquisition System for Wind Tunnel Test of a 1/10 Scale OH-6A Helicopter Fuselage Book in PDF, ePub and Kindle
For over half a century the NPS Aerolab Low Speed Wind Tunnel located in Halligan Hall of the Naval Postgraduate school has served to provide students and facility with meaningful aerodynamic data for research and problem analysis. New data acquisition hardware was installed three years ago but never fully verified, and contained no integrated software program to collect data from the strain-gauge balance pedestal. Existing National Instruments based hardware for the NPS low-speed wind tunnel was reconfigured to obtain data from the strain- gauge pedestal. Additionally, a data acquisition software program was written in LabVIEW(C) to accommodate the hardware. The Virtual Instruments (VI) program collects and plots accurate data from all four strain gauges in real-time, producing non-dimensional force and moment coefficients. A research study on the performance of an OH-6A helicopter fuselage was conducted. NPS Aerolab wind tunnel tests consisted of drag, lift, and pitching moment measurements of the OH-6A along yaw and angle-of attack sweeps. The results of the NPS wind tunnel data were compared against testing conducted on a full-scale OH-6A helicopter in NASA Ames' 40 ft. x 80ft. wind tunnel, along with the U.S. Army's Light Observation Helicopter (LOH) wind tunnel tests. Results of current testing substantiate the LabVIEW(C) code.
| Author | : K. S. Keen |
| Publisher | : |
| Total Pages | : 122 |
| Release | : 1997 |
| Genre | : Equations of motion |
| ISBN | : |
Download An Analytic Investigation of Accuracy Requirements for Onboard Instrumentation and Film Data for Dynamically Scaled Wind Tunnel Drop Models Book in PDF, ePub and Kindle
An analytic study was conducted to evaluate anticipated ranges and required accuracies for onboard linear acceleration and angular rate (or acceleration) measurement equipment to be mounted within dynamically scaled wind tunnel drop models. Generic simulations of the separation motion of a tumbling fuel tank both at full scale and at 1/15th wind tunnel model scale were generated using an analytic trajectory simulation program coupled with a prescribed aerodynamic database. The simulations provide a basis for sizing the required instrumentation for proof of concept demonstrations of telemetry techniques in the wind tunnel. The simulations were also used as test cases to demonstrate extraction of aerodynamic information from drop data positions and orientations as read from film records via an inverse solution of the store equations of motion. The studies also aid identification and evaluation of inaccuracies associated with the basic dynamic scaling laws and standard film based data reduction techniques.
| Author | : Richard Frank Kilburg |
| Publisher | : |
| Total Pages | : |
| Release | : 1957 |
| Genre | : Harvesting machinery |
| ISBN | : |
Download Wind Tunnel Tests of the Kaman 1/8 Scale Helicopter Fuselage Model to Determine Forces and Moments Due to Various Configurations Book in PDF, ePub and Kindle
| Author | : National Aeronautics and Space Administration (NASA) |
| Publisher | : Createspace Independent Publishing Platform |
| Total Pages | : 38 |
| Release | : 2018-08-16 |
| Genre | : |
| ISBN | : 9781725147508 |
Download Application of a PC Based, Real-Time, Data-Aquisition System in Rotorcraft Wind-Tunnel Testing Book in PDF, ePub and Kindle
Data has been acquired for a rotocraft test in the NASA Langley Transonic Dynamics Tunnel using a desktop data acquisition system. The system, which consists of an IBM Personal Computer AT (PC-AT) and an Omega Engineering OM-900 Stand-Alone Interface System, is well suited for acquiring high speed data on a limited number of channels. The data acquisition system and the interrupt driven software which provides the capability for near real-time cyclic data acquisition as well as data storage and display are described. Wilbur, Matthew L. Langley Research Center NASA-TM-4119, L-16565, NAS 1.15:4119, AVSCOM-TM-89-B-003, AD-A213083 RTOP 505-63-51-03...
| Author | : James L. Williams |
| Publisher | : |
| Total Pages | : 736 |
| Release | : 1956 |
| Genre | : Helicopters |
| ISBN | : |
Download Wind-tunnel Investigation of Effects of Fuselage Cross-sectional Shape, Fuselage Bend, and Vertical-tail Size on Directional Characteristics of Nonoverlap-type Helicopter Fuselage Models Without Rotors Book in PDF, ePub and Kindle
A low-speed investigatio was made in the Langley stability tunnel to determine the directional stability characteristics of tandem nonoverlap-type helicopter fuselages without rotors. The investigation consisted of a study of both bent and straight fuselages having either circular or essentially elliptical cross sections and with two vertical-tail sizes.
| Author | : |
| Publisher | : |
| Total Pages | : 50 |
| Release | : 2001 |
| Genre | : |
| ISBN | : |
Download COMFRC: Data Acquisition Software for the AMRL Low Speed Wind Tunnel Book in PDF, ePub and Kindle
The data acquisition system in the Low Speed Wind Tunnel (LSWT) at the Aeronautical and Maritime Research Laboratory (AMRL) was upgraded recently. A new UNIX based host computer provides a C and X/Motif software development environment. COMFRC is the primary software responsible for the data acquisition, data reduction and storage of data in the LSWT. The operator can follow a test schedule and take data accordingly from a single graphical user interface. Data and results are displayed in real time during the acquisition process. This document provides details of the new data acquisition system and its operation. The procedures required to configure and carry out an entire wind tunnel test using COMFRC and a suite of associated software packages are described in detail.
| Author | : Hong Foo Toon |
| Publisher | : |
| Total Pages | : 174 |
| Release | : 2003 |
| Genre | : Automatic data collection systems |
| ISBN | : |
Download Development of a Force and Airspeed Data Acquisition System for the Embry-Riddle Aeronautical University 30x40 In. Subsonic Wind Tunnel Book in PDF, ePub and Kindle
"This thesis will emphasize on the new data acquisition program written in the LabVIEW environment in 2000. [snip] The system described in this thesis is capable of reading values from various instruments and reducing those data to yield aerodynamic loads, coefficients, temperatures and air velocities."--Leaf v.
| Author | : James C. Biggers |
| Publisher | : |
| Total Pages | : 0 |
| Release | : 1962 |
| Genre | : |
| ISBN | : |
Download Wind-tunnel Tests of Two Full-scale Helicopter Fuselages Book in PDF, ePub and Kindle
| Author | : Patrick A. Witt |
| Publisher | : |
| Total Pages | : 101 |
| Release | : 1986 |
| Genre | : |
| ISBN | : |
Download Development of a Data Acquisition System to Aid in the Aerodynamic Study of Various Helicopter Configurations Book in PDF, ePub and Kindle
This thesis developed a data acquisition system to be used in conjunction with the 3.5' x 5.0' low speed wind tunnel at the Naval Postgraduate School. Interactive graphic programs were developed to aid in data acquisition and analysis. In addition, the internal balance that was designed by Major Scott Mair and Major Chris Sargent was redesigned to correct some problems encountered with the drag component. The balance was also instrumented to record the pitch and yaw moment components. A calibration rig was designed and constructed in order to evaluate the interactions to the different components. The equipment used and computer programs developed for data acquisition and analysis were adequate. However, balance calibration revealed problems with the calibration rig and location of the roll component strain gage. Both of these problems will have to be corrected before accurate readings can be expected from this balance design. Keywords: Data recuction; Landing gear design; Helicopter noses and tails. (Author).
| Author | : Craig D. Edwards |
| Publisher | : |
| Total Pages | : 30 |
| Release | : 1999 |
| Genre | : Computer programs |
| ISBN | : |
Download MicroVAX/bus Communication Testing Software for the Low Speed Wind Tunnel Data Acquisition System Book in PDF, ePub and Kindle
Software has been developed to test the communication between the MicroVAX computer and the bi-directional parallel data bus in the Low Speed Wind Tunnel (LSWT) data acquisition system. It enables reading any combination of data parameters from the bus for a user-defined number of iterations. An output file is created which contains the final values, average bus communication times associated with the read process and a statistical analysis of the recorded data. This report describes the operation of the software and presents results of tests performed on the existing data acquisition configuration.
