ICIASF '95 Record. International Congress on Instrumentation in Aerospace Simulation Facilities最新文献

{"title":"Pressure sensitive paint: application to a sinusoidal pressure fluctuation","authors":"B. Carroll, A. Winslow, J. Abbitt, K. Schanze, M. Morris","doi":"10.1109/ICIASF.1995.519466","DOIUrl":"https://doi.org/10.1109/ICIASF.1995.519466","url":null,"abstract":"An experimental characterization of the frequency response of a Pressure Sensitive Paint (PSP) has been performed. The PSP response to a sinusoidal pressure field was investigated. A Fourier analysis was then used to extended the results to a general periodic pressure field. Amplitude response and phase shift as a function of frequency are presented. The techniques developed in this paper are suitable for comparing the unsteady characteristics of various PSP formulations. Additionally, the frequency response characterization may be used in dynamic compensation techniques to correct for PSP time lag.","PeriodicalId":339620,"journal":{"name":"ICIASF '95 Record. International Congress on Instrumentation in Aerospace Simulation Facilities","volume":"264 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126054143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative optical measurements of airspeed and aerosols on a DC-8 aircraft","authors":"R. Bogue, R. Mcgann, T. Wagener, J. Abbiss, Anthony E. Smart","doi":"10.1109/ICIASF.1995.519487","DOIUrl":"https://doi.org/10.1109/ICIASF.1995.519487","url":null,"abstract":"NASA Dryden supported a cooperative flight test program on the NASA DC-8 aircraft in November 1993. This program evaluated optical airspeed and aerosol measurement techniques. Three brassboard optical systems were tested. Two were laser Doppler systems designed to measure freestream-referenced airspeed. The third system was designed to characterize the natural aerosol statistics and airspeed. These systems relied on optical backscatter from natural aerosols for operation. The DC-8 aircraft carried instrumentation that provided real-time flight situation information and reference data on the aerosol environment. This test is believed to be the first to include multiple optical airspeed systems on the same carrier aircraft, so performance could be directly compared. During 23 hr of flight, a broad range of atmospheric conditions was encountered, including aerosol-rich layers, visible clouds, and unusually clean (aerosol-poor) regions. Substantial amounts of data were obtained. Important insights regarding the use of laser-based systems of this type in an aircraft environment were gained. This paper describes the sensors used and flight operations conducted to support the experiments. The paper also briefly describes the general results of the experiments.","PeriodicalId":339620,"journal":{"name":"ICIASF '95 Record. International Congress on Instrumentation in Aerospace Simulation Facilities","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115473468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Signal processing hardware and software applied to the development of a real-time infrared mission simulation test capability","authors":"R. H. Fugerer, H. Lowry, D. J. Hervig, L. Holt","doi":"10.1109/ICIASF.1995.519473","DOIUrl":"https://doi.org/10.1109/ICIASF.1995.519473","url":null,"abstract":"The Arnold Engineering Development Center (AEDC) Scene Generation Test Capability (SCTC) program has completed the development of a laser based Direct Write Scene Generation (DWSG) facility that provides dynamic mission simulation testing for infrared (IR) Focal Plane Arrays (FPAs) and their associated signal processing electronics. The AEDC DWSG Focal Plane Array Test Capability (FPATC) includes lasers operating at 0.514, 1.06, 5.4, or 10.6 /spl mu/m, and Acousto-Optic Deflectors (AODs) which modulate the laser beam position and amplitude. Complex Radio Frequency (RF) electronics control each AOD by providing multi-frequency inputs. These inputs produce a highly accurate and independent multi-beam deflection, or \"rake\", that is swept across the FPA sensor under test. Each RF amplitude input to an AOD translates into an accurate and independent beam intensity in the rake. Issues such as scene fidelity, sensor frame rates, scenario length, and real-time laser beam position adjustments require RF control electronics that employ the use of advanced analog and digital signal processing techniques and designs. By implementing flexible system architectures in the electronics, the overall capability of the DWSG to adapt to emerging test requirements is greatly enhanced. Presented in this paper is an overview of the signal processing methodology and designs required to handle the DWSG requirement. Further, electronic design techniques that enabled the system to be implemented within program cost constraints will also be presented. These electronic designs include a broad range of disciplines including digital signal processing hardware and software, programmable logic implementations, and advanced techniques for high fidelity RF synthesis, switching, and amplitude control. Techniques for validating electronic performance will also be presented along with data acquired using those techniques.","PeriodicalId":339620,"journal":{"name":"ICIASF '95 Record. International Congress on Instrumentation in Aerospace Simulation Facilities","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129730921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Infrared inspection method for actively cooled panels","authors":"B. Hauber","doi":"10.1109/ICIASF.1995.519121","DOIUrl":"https://doi.org/10.1109/ICIASF.1995.519121","url":null,"abstract":"This paper discusses a new technique for determining the integrity of Actively Cooled Thermal Protection Systems designed for testing in high heat flux environments. These components, which use common as well as leading edge materials, are expensive and time consuming to fabricate. Using commercial thermography systems, a technique has been developed to detect blocked passages that would effect the performance and in many cases the survivability of the components. This not only avoids wasted test time but also provides a new capability for accepting manufactured systems. The technique is applied before, during and after testing as a damage assessment tool. The thermography system consists of a camera, video recorder, and a PC for data processing and viewing. The camera can detect the spatial and temporal distribution of infrared radiation emanating from the surface of a specimen. This information, together with material property data, can be used to calculate and display surface temperature distribution. The images are processed to provide false-color contour plots.","PeriodicalId":339620,"journal":{"name":"ICIASF '95 Record. International Congress on Instrumentation in Aerospace Simulation Facilities","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121681438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Transputer-based static data acquisition systems at DNW","authors":"C.J.J. Oosen, H. Slot","doi":"10.1109/ICIASF.1995.519476","DOIUrl":"https://doi.org/10.1109/ICIASF.1995.519476","url":null,"abstract":"In general a substantial part of wind tunnel measurements consists of the acquisition of static signals. Static in this context refers to the slowly varying signals representing the steady conditions during a measurement. Recently the German-Dutch Wind Tunnel DNW has replaced its static data acquisition systems. The data acquisition hardware for two new systems has been delivered by the Dutch National Aerospace Laboratory NLR. The channel hardware is based on the proven concept of the NLR conditioning unit. This unit was selected by DNW because of its excellent analog characteristics. The unit type delivered to DNW is a further development of the generation of units in use at several wind tunnels (e.g. European Transonic Wind Tunnel ETW, Germany). This generation of conditioning units supports host computer controlled data acquisition but requires manual setting and adjustment of gain excitation voltage etc. The upgrade mainly consists of the replacement of this manual control by computer control. The internal control functions are performed by a special type of microprocessor (transputer). This microprocessor also performs initial computations on the digitized input signal. The systems have been fully operational since early 1995 and have fulfilled all specifications and operational requirements.","PeriodicalId":339620,"journal":{"name":"ICIASF '95 Record. International Congress on Instrumentation in Aerospace Simulation Facilities","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125580461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First Experience with a Fast Staring Infrared Camera System","authors":"B. Schulze","doi":"10.1109/ICIASF.1995.519107","DOIUrl":"https://doi.org/10.1109/ICIASF.1995.519107","url":null,"abstract":"during a siniplc at1 hoc t,cst, in tlic TH2-sliock t,uiiiicl of RWTI-I Anclien for capt,iiriiig aiitl post-imaging of fxst siirfnce terril)erat,iire t,raiisiciit,s oii ii liy1)ersoiiic forclmly riiodcl c,oiifigiira.t,ioii (Fig. I ) . 111 order t,o image tempera.t,iirc t,raiisicnt,s on tliis 1110del iiiatlc fi-om ca,rl)oii film, 1.111: liist,ory of variaiit, infi.a,rccl snrfacr r;ttli;ition TVX capturctl tliiriiig sonic oiitls of cst,ahlishetl flow coiitlit,ions 1 2 ~ ~ niorc tJiaii 20 frniiics p(’r shot,. Prior t 8 0 t;liis test an oil-site t,wo 1)oiiit corrcctioii m t l teiril)c,rat,iire calil)ra.t,ion of t,lic camera T Y ~ S pcrformctl wvit,li a 1)lac.k botly iiist,alltd n c x tJie iiiotlcl iii t lic t,est scct;ioii of t.hc sliock tiiniicl. Infrared rni1i;Ltivc fliix (la t,a aqiiiretl fi-om t,lic s i i r fxe of tlic riiotlcl cmiiltl t h i s he t,raiisforriietl int,o siirfacc kiiiper;it,iires w1iic.h are iisctl tm calciilate the prtyxiit, acro!,lierniotl~~l;llliic. lieat fl i is tlist,ril)iit,ion oil it,s si irfx(>. T h e model itself was eqiiippcd wit,li coii-T:ciit.ioiial tlicriiiocoiiplcs iiicorporat,ec! along t,lie cent,crliiie of tlie bot1tom model wall arid tjlic esteiitletl Iiody flap. All d a t a iiieasiiretl 11y the t,lierrrioconplos arc iised for perforining corrr:l;~t,ions wit,li acqnirerl iinage (lata iiiformation. Tlie capture of image tliLtn was initialized liy a, trigger signal from a pressiire traiistliicer wliicli seiised t,lie pressure impulse of t,lie shock wavc rinining through the tiinnel after riipturc of it,s tliap1ir:qpi. The forebody rnotlel i n i1priglit8 att i tude and iiicliiictl by 20 (leg. t,o the flow vect.or was rota.t.ctl toget,lic>r witli the suspensioii system ;~l)out t h flow axis l ~ y 90 deg., so t h t tJic bot,tZorri of tlic niotlci could hc observetl by the camera througli 1111 infi.aretl wiiidow at the side of the test sectioii c l imi l~er (Fig. 2) . Unfortunately t,lie axial posit,ion of t,lie avaiiable window was fixed as was the at,titiidc of the model, so I;liai, minor iinfavoiirat,c> reflcctioiis iri a~coidai i r r wit;li tliis test set-lip ~ o n l d 11cjtj bc avoided. opc1-atrct a t , 1000 fran1cs/seco11tl :Illcl has 1)ccYl pro-etl Uecmse cvcii 110 mirrors t o alter t,lic optical path were availalile) t,lie txxst, set,-ii1) was arccptcd as tlcscri-","PeriodicalId":339620,"journal":{"name":"ICIASF '95 Record. International Congress on Instrumentation in Aerospace Simulation Facilities","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123371901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The development of a focal plane array data system for component-level characterization and real-time mission simulation testing","authors":"R.H. Fugerer, D.J. Hervig, L. Holt, C. R. Banks, D. I. Jennings, T. Worley","doi":"10.1109/ICIASF.1995.519108","DOIUrl":"https://doi.org/10.1109/ICIASF.1995.519108","url":null,"abstract":"This paper will describe the USAF Arnold Engineering Development Center (AEDC) technology efforts that provide signal processing and data system support for infrared (IR) Focal Plane Array (FPA) testing. The requirements for AEDC space sensor testing range from component-level FPA characterization to advanced mission simulation. The technology efforts underway address these requirements by developing hardware and software that meet AEDC's generic needs for FPA testing. Component-level FPA characterization places unique requirements on system fidelity and bandwidth performance. Diversity in sensor types being tested and levels of sensor integration creates the need for versatility in data handling and sensor interfaces. Mission simulation requirements emphasize the need for extended data storage, system throughput, and data display capabilities. A signal processing system will be presented which addresses AEDC's requirements for component-level sensor operation data acquisition, and flexible interface architectures that can be modified quickly to accommodate different sensor interfaces and data formats. The system will also address the need for high-speed storage of very large data arrays during mission simulation testing. Techniques used to verify and validate system operation will also be presented.","PeriodicalId":339620,"journal":{"name":"ICIASF '95 Record. International Congress on Instrumentation in Aerospace Simulation Facilities","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131885959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}