Aircraft Simulation Techniques Used in Low-Cost, Commercial Software

2003 ◽  
Author(s):  
Michael Zyskowski
Keyword(s):  
Low Cost ◽  
Commercial Software ◽  
Simulation Techniques

scholarly journals IMPROVING UAV TELEMETRY POSITIONING FOR DIRECT PHOTOGRAMMETRY

2021 ◽  
Vol XLIII-B2-2021 ◽  
pp. 61-68
Author(s):  
L. Rossi ◽  
F. Ioli ◽  
E. Capizzi ◽  
L. Pinto ◽  
M. Reguzzoni
Keyword(s):  
Low Cost ◽  
Three Dimensional ◽  
Control Points ◽  
Three Dimensional Model ◽  
Commercial Software ◽  
Ground Control Points ◽  
Lower Accuracy ◽  
Least Squares Adjustment ◽  
Gnss Receivers

Abstract. A fundamental step of UAV photogrammetric processes is to collect Ground Control Points (GCPs) by means of geodetic-quality GNSS receivers or total stations, thus obtaining an absolutely oriented model with a centimetric accuracy. This procedure is usually time-consuming, expensive and potentially dangerous for operators who sometimes need to reach inaccessible areas. UAVs equipped with low-cost GNSS/IMU sensors can provide information about position and attitude of the images. This telemetry information is not enough for a photogrammetric restitution with a centimetric accuracy, but it can be usefully exploited when a lower accuracy is required. The algorithm proposed in this paper aims at improving the quality of this information, in order to introduce it into a direct-photogrammetric process, without collecting GCPs. In particular, the estimation of an optimal trajectory is obtained by combining the camera positions derived from UAV telemetry and from the relative orientation of the acquired images, by means of a least squares adjustment. Then, the resulting trajectory is used as a direct observation of the camera positions into a commercial software, thus replacing the information of GCPs. The algorithm has been tested on different datasets, comparing the classical photogrammetric solution (with GCPs) with the proposed one. These case-studies showed that using the improved trajectory as input to the commercial software (without GCPs) the reconstruction of the three-dimensional model can be improved with respect to the solution computed by using the UAV raw telemetry only.

scholarly journals Circular polarization reconfigurable antenna for mid-band 5G applications with a new reconfigurable technique

2020 ◽  
Vol 19 (2) ◽  
pp. 802
Author(s):  
Alaa Imran AL-Muttairi ◽  
Malik Jasim Farhan
Keyword(s):  
Resonant Frequency ◽  
Circular Polarization ◽  
Low Cost ◽  
Axial Ratio ◽  
Maximum Size ◽  
Impedance Bandwidth ◽  
Reconfigurable Antenna ◽  
Commercial Software ◽  
Innovative Technique

In this paper, a novel low cost, single-feed, and circular polarization reconfigurable antenna is designed and fabricated for future mid-band 5G applications. An innovative technique is used in this approach, which combines three techniques, namely: polygon U-slot, switchable vertical or horizontal slots, and shorting posts. The proposed antenna can alter its polarization sense between RHCP and LHCP with the ability to adjust the axial ratio position with respect to frequency along the impedance bandwidth of the antenna. The antenna is built on RT/duroid 5880 substrate with a maximum size of (31*31*3.15) .Two real diodes are integrated across the slot to change polarization sense. CST commercial software is used to simulate the antenna, and then it is fabricated and measured practically. Good agreements between the two results are achieved. However, The antenna has impedance bandwidth starting from 3.4995GHz to 3.73GHz with overlapped axial ratio bandwidth of 2.1% for both operation senses. Also, the antenna has good gain, and it has one resonant frequency at 3.6GHz for both operating states.

Evaluation of Efficiency of Edge Tool on the Basis of New Technique for Analyzing Parameters of Scribing Mark

2015 ◽  
Vol 719-720 ◽  
pp. 96-101 ◽  
Author(s):  
Boris Y. Mokritskii ◽  
Dmitriy A. Pustovalov ◽  
Alexey Anatolevich Vereschaka ◽  
Anatoliy Stepanovich Vereschaka ◽  
A.D. Verhoturov
Keyword(s):  
Nondestructive Testing ◽  
Low Cost ◽  
Cutting Tools ◽  
Operating Conditions ◽  
Simulation Techniques ◽  
Testing Techniques ◽  
Rational Type ◽  
Edge Tool ◽  
Selection Of

Experimental comparative evaluation of cutting properties of edge tools underspecified operating conditions is undesirable, since it takes a lot of time and expenses. The need for development of simulation techniques is clear, and the above techniques can be the basis for the classification of compared edge cutting tools on their most appropriate features and for the selection of the most rational type of such a tool using a technique of nondestructive testing. The analysis of the studies in the field of evaluation of the cutting tool properties by nondestructive testing techniques as well as our own experience of developing similar techniques suggest that such a technique could be developed on the basis of the pendulum scribing technique. Thus, the objective of this study was to develop procedures for the selection of rational parameters of edge cutting tools for specified machining conditions based on simulating a low-cost process.The study was supported by grant No. 9.251.2014/K, project code 251.

scholarly journals P049: Modelling and manufacturing of a 3D printed trachea for cricothyroidotomy simulation

CJEM ◽  
2017 ◽  
Vol 19 (S1) ◽  
pp. S94 ◽  
Author(s):  
G. Doucet ◽  
S. Ryan
Keyword(s):  
Low Cost ◽  
Cricoid Cartilage ◽  
Thyroid Cartilage ◽  
Simulation Models ◽  
Cost Effective ◽  
High Fidelity ◽  
3D Printer ◽  
Emergency Airway ◽  
Simulation Techniques ◽  
Rural And Remote Areas

Introduction: Most current cricothyroidotomy simulation models are either expensive or low fidelity and limit the learner to an unrealistic simulation experience. The goal of this project is to innovate current simulation techniques by 3D printing anatomically accurate trachea models. By doing so emergency cricothyroidotomy simulation can be accessible, high fidelity, cost effective and replicable. Methods: 3D modelling software was used in conjunction with a desktop 3D printer to design and manufacture an anatomically accurate model of the cartilage within the trachea (thyroid cartilage, cricoid cartilage, and the tracheal rings). The initial design was based on dimensions found in studies measuring the dimensions of tracheal anatomy. This ensured an appropriate anatomical landmark design was achieved. Several revisions of the model were designed and qualitatively assessed by medical and simulation professionals to ensure anatomical accuracy that exceeded that of the currently used, low cost, cricothyroidotomy simulation model in St. John’s. Results: Using an entry level desktop 3D printer, a low cost tracheal model was successfully designed that can be printed in under 3 hours. Due to its anatomical accuracy, flexibility and durability, this model is ideal for use in emergency medicine simulation training. Additionally, the model can be assembled in conjunction with a membrane to simulate tracheal ligaments and skin for appearance. Conclusion: The end result is a high fidelity simulation that will provide users with an anatomically correct model to practice important skills used in emergency airway surgery, specifically land marking, incision and intubation. This design is a novel, easy to manufacture, replicable, low fidelity trachea model that can be used by educators with limited resources such as those in rural and remote areas.

Simulation Techniques for Improving Fabrication Yield of RF-CMOS ICs

2012 ◽  
pp. 61-98 ◽  
Author(s):  
Amparo Herrera
Keyword(s):  
Integrated Circuits ◽  
High Performance ◽  
Low Cost ◽  
Simulation Models ◽  
Rf Circuits ◽  
Ease Of Use ◽  
Battery Life ◽  
Simulation Techniques ◽  
Microwave Monolithic Integrated Circuits ◽  
Reliable Design

One of the industry sectors with the largest revenue in the telecommunication field is the wireless communications field. Wireless operators compete for being the first to place their products in the market to obtain the highest revenues. Moreover, they try to offer products that fulfill the user demands in terms of price, battery life, and product quality. All these requirements must be also fulfilled by the designer of the MMIC (Microwave Monolithic Integrated Circuits) circuits that will be used in those wireless terminals, achieving a reliable design, with high performance, low cost, and if possible, in one or two foundry iterations so as to bring the product out to the market as soon as possible. Silicon based technologies are the lowest cost. The demand to use them is simply based on that fact, but their usage in these applications is limited by the ease of use for the designer, in particular, by the lack of adequate simulation models. These technologies don’t include some essential components for the design of RF circuits, which leads to measurement results quite different from those simulated. On the other hand, GaAs based technologies, more mature in the RF and microwave field, provide very accurate models, as well as additional tools to verify the design reliability (yield and sensitivity analysis), allowing good results often with only one foundry iteration. The deep study of the problems presented when designing Si-based RF circuits will convince the reader of the need to use special tools as electromagnetic simulation or coo simulation to prevent it. The chapter provides different simulation techniques that help the designer to obtain better designs with a lower cost, as foundry iterations are reduced.

Construction of a Low Cost Custom 2-D Bar Code Reader for Tube Racks

2002 ◽  
Vol 7 (6) ◽  
pp. 96-102
Author(s):  
William Neil ◽  
Stephen Michalczyk ◽  
Mark Russo
Keyword(s):  
Low Cost ◽  
Image Acquisition ◽  
Software Components ◽  
System Software ◽  
Flatbed Scanner ◽  
Commercial Software ◽  
Bar Code ◽  
Bar Codes ◽  
Custom Software

We describe the development of a custom system for reading 2-D DataMatrix bar codes imprinted on the base of tubes stored in a rack. The system software drives a standard flatbed scanner in order to acquire an image, interprets DataMatrix bar codes at predefined locations in the image, and returns in an array the interpreted bar code data along with other associated information. Commercial software components were used for the image acquisition and bar code interpretation portion of the software. An example is given that illustrates how to call the custom software from Microsoft® Excel and insert the returned data directly into a spreadsheet.

scholarly journals Low cost real time UAV stereo photogrammetry modelling technique – accuracy considerations

2018 ◽  
Vol 63 ◽  
pp. 00020 ◽  
Author(s):  
Pawel Burdziakowski
Keyword(s):  
Real Time ◽  
Low Cost ◽  
Commercial Software ◽  
Software Application ◽  
Mapping System ◽  
Air Vehicle ◽  
Stereo Photogrammetry ◽  
Aerial Mapping ◽  
Modelling Techniques ◽  
New Consumer

The paper presents accuracy considerations regarding three 3D modelling techniques. The tested new consumer type stereo camera (ZED 3D Stereolabs) has been implemented info an aerial mapping system, on board micro air vehicle MAV) and tested object has been mapped using a real-time photogrammetry with original real-time software application. The evaluated results has been compared with model gained with a state of art unmanned aerial vehicles (UAV) photogrammetry process using commercial UAV and commercial software, and the terrestrial photogrammetry modelling process with other commercial software. Papers concludes the tested real-time technology accuracy with compare to the traditional technique, and discusses real-time photogrammetry modelling in terms of engineering applications.

scholarly journals Defect Process, Dopant Behaviour and Li Ion Mobility in the Li2MnO3 Cathode Material

Energies ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1329 ◽  
Author(s):  
Navaratnarajah Kuganathan ◽  
Efstratia Sgourou ◽  
Yerassimos Panayiotatos ◽  
Alexander Chroneos
Keyword(s):  
Cathode Material ◽  
Low Cost ◽  
Lithium Ion ◽  
Intrinsic Defect ◽  
Ion Diffusion ◽  
Simulation Techniques ◽  
Low Toxicity ◽  
Li Ion ◽  
Defect Process ◽  
Lithium Ion Diffusion

Lithium manganite, Li2MnO3, is an attractive cathode material for rechargeable lithium ion batteries due to its large capacity, low cost and low toxicity. We employed well-established atomistic simulation techniques to examine defect processes, favourable dopants on the Mn site and lithium ion diffusion pathways in Li2MnO3. The Li Frenkel, which is necessary for the formation of Li vacancies in vacancy-assisted Li ion diffusion, is calculated to be the most favourable intrinsic defect (1.21 eV/defect). The cation intermixing is calculated to be the second most favourable defect process. High lithium ionic conductivity with a low activation energy of 0.44 eV indicates that a Li ion can be extracted easily in this material. To increase the capacity, trivalent dopants (Al3+, Co3+, Ga3+, Sc3+, In3+, Y3+, Gd3+ and La3+) were considered to create extra Li in Li2MnO3. The present calculations show that Al3+ is an ideal dopant for this strategy and that this is in agreement with the experiential study of Al-doped Li2MnO3. The favourable isovalent dopants are found to be the Si4+ and the Ge4+ on the Mn site.

scholarly journals Replacement of Professional Photogrammetric Workstations with Low Cost or Free of Charge Photogrammetric Software and Services for Image Triangulation and Image Matching

2013 ◽  
Vol 12 ◽  
pp. 42-48
Author(s):  
Umesh Kumar
Keyword(s):  
Digital Technology ◽  
Image Matching ◽  
Accuracy Assessment ◽  
Low Cost ◽  
Image Data ◽  
Free Software ◽  
Commercial Software ◽  
Aerial Triangulation ◽  
Modern Context ◽  
Image Orientation

In the modern context of digital technology in the field of surveying and mapping, the technique of digital photogrammetry plays crucial role in all steps of mapping. There are some very expensive as well as low cost and free softwares are available in the market for professional photogrammetric work stations. The image triangulation and image matching is one of the very important steps of photogrammetry for which LPS as a commercial software is available in market. There are some low cost and free software as 123D Catch and Patch Boased Multi View Stereo Softwear (PMVS) also available. So, this paper mainly deals with the accuracy as well as the performance of those software for aerial triangulation and image matching for airborne image data to substitute commercial software for photogrammetric workstations. The accuracy assessment of image orientation, points cloud as well as DSM generated from those points cloud are also performed and compared with all products of LPS as commercial software. Nepalese Journal on Geoinformatics -12, 2070 (2013AD): 42-48

scholarly journals LOW-COST 4D BIM MODELLING: A COMPARISON BETWEEN FREECAD AND COMMERCIAL SOFTWARE

2019 ◽  
Vol XLII-2/W17 ◽  
pp. 107-114
Author(s):  
D. Di Donato ◽  
M. Abita
Keyword(s):  
Open Source ◽  
Public Space ◽  
Open Source Software ◽  
Low Cost ◽  
Steel Structures ◽  
Historical Reconstruction ◽  
Commercial Software ◽  
Current State ◽  
Definition Of

Abstract. The paper aims to investigate the potential inherent in a FOSS (Free and Open Source Software) approach for the 4D BIM modelling using Freecad. In order to reach this goal it shows a comparison of Freecad features with those of commercial software, considering the evaluation of the effective application of this Open Source software in the professional environment, and highlighting the progress in the FOSS BIM area, that still represents an unexplored study field if compared to the vast publications related to BIM modelling that occurred in the last two decades. To this end, the study has been carried out on a singular case study, a steel canopy which has been designed for the urban renewal of a public space in Teramo. Despite its size, the canopy required the definition of complex details. Its structural system has addressed the study to compare Freecad with some software dedicated to steel structures or particularly suitable for the modelling of this specific structural typology: Tekla Structures and Sketchup. Starting from a concise historical reconstruction of the FOSS spread, the paper introduces a brief overview of the potential of Freecad in terms of BIM modelling - also proposing an operational modality to facilitate the drawing of BIM elements within the software - and finally reaching to the examination of three simulations which has been carried. This comparison can be useful to establish the current state of development of Freecad in the field of 4D BIM.

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