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2011

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Articles 631 - 660 of 5801

Full-Text Articles in Engineering

Method And Apparatus For Characterizing Microscale Formability Of Thin Sheet Materials, Nasr A. Shuaib, Marwan K. Khraisheh Oct 2011

Method And Apparatus For Characterizing Microscale Formability Of Thin Sheet Materials, Nasr A. Shuaib, Marwan K. Khraisheh

Mechanical Engineering Faculty Patents

A method of predicting sheet formability at a microscale level includes the steps of providing a grid pattern on a test sheet, bulging the test sheet to a hemispherical shape until a crack is initiated on the surface of the test sheet, detecting the initiation of the crack, acquiring two images of the surface adjacent to the crack and calculating surface strains on the test sheet.

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Methods And Compositions For Pigmented Self-Stratifying Coatings, Jamil Baghdachi, Heidi Rosalia Perez Hernandez, Cynthia Gazepis Templeman, Halfeng He Oct 2011

Methods And Compositions For Pigmented Self-Stratifying Coatings, Jamil Baghdachi, Heidi Rosalia Perez Hernandez, Cynthia Gazepis Templeman, Halfeng He

Patents

A coating composition may include a polyol, a silsesquioxane, a polyurethane dendrimer, a crosslinker, and a pigment in contact with a dispersing agent. A process for preparing a coating composition is further disclosed including the step of contacting a polyol, a silsesquioxane, a polyurethane dendrimer, and a crosslinker to form a coating mixture dispersed within a solvent. The process further includes adding a pigment in contact with a dispersing agent to the coating mixture, and forming a self-stratifying coating having at least one layer, wherein the pigment resides substantially within one of the at least one layer.

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History Of The Biological Systems Engineering Program In Nebraska, University Of Nebraska-Lincoln, William E. Splinter Oct 2011

History Of The Biological Systems Engineering Program In Nebraska, University Of Nebraska-Lincoln, William E. Splinter

Department of Agricultural and Biological Systems Engineering: Faculty Publications

The Farm Machinery/Agricultural Engineering/Biological Systems Engineering program current and former faculty members at the University of Nebraska, as demonstrated here, has made a statewide, national, and worldwide impact on the efficient production of food. The quality of this recognition is evidenced best by peer professionals through recognized ASABE awards received by Nebraska alumni or professors. Since its inception in 1909 and until 2010, there have been 10 national presidents, 19 gold medal recipients and 33 named national award recipients. Currently there are 31 ASABE Fellows and two members of the National Academy of Engineering. This national recognition comes as a …

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Signquote: A Remote Testing Facility For Eliciting Signed Qualitative Feedback, Jerry Schnepp, Rosalee Wolfe, Brent Shiver, John Mcdonald, Jorge Toro Oct 2011

Signquote: A Remote Testing Facility For Eliciting Signed Qualitative Feedback, Jerry Schnepp, Rosalee Wolfe, Brent Shiver, John Mcdonald, Jorge Toro

Visual Communications and Technology Education Faculty Publications

Sign synthesis is still an evolving technology and improving it requires the elicitation of qualitative feedback from users. Current options for acquiring qualitative feedback are limited. Face-toface tests conducted in sign language are expensive. On the other hand, remote tests do not use the preferred language of the test participants. A new tool, SignQUOTE, (Signed Qualitative Usability Online Testing Environment) is a configurable, cross platform remote testing system based entirely on sign language. It includes an innovative method for capturing qualitative feedback in sign language via webcam. In a comparison study, participants viewed animations of American Sign Language and gave …

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A Reversibility Analysis Of Encoding Methods For Spiking Neural Networks, Catherine Johnson, S. Roychowdhury, Ganesh K. Venayagamoorthy Oct 2011

A Reversibility Analysis Of Encoding Methods For Spiking Neural Networks, Catherine Johnson, S. Roychowdhury, Ganesh K. Venayagamoorthy

Mining Engineering Faculty Research & Creative Works

There is much excitement surrounding the idea of using spiking neural networks (SNNs) as the next generation of function-approximating neural networks. However, with the unique mechanism of communication (neural spikes) between neurons comes the challenge of transferring real-world data into the network to process. Many different encoding methods have been developed for SNNs, most temporal and some spatial. This paper analyzes three of them (Poisson rate encoding, Gaussian receptor fields, and a dual-neuron n-bit representation) and tests to see if the information is fully transformed into the spiking patterns. an oft-neglected consideration in encoding for SNNs is whether or not …

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Effect On The Processing Characteristics Of Zno Varistors Produced Using Vibratory Milling, Maura Kelleher, M.S.J. Hashmi Oct 2011

Effect On The Processing Characteristics Of Zno Varistors Produced Using Vibratory Milling, Maura Kelleher, M.S.J. Hashmi

Conference Papers

Abstract. Each manufacturing stage in the production of zinc oxide varistors from powder preparation to the final encapsulated device is important not only for the formation of the varistor component with optimum microstructure and thus electrical characteristics but also for avoiding the introduction of flaws and reduced yield. In this paper the authors describe and discuss the effect of multi-elemental oxide additives having been milled for different durations using a vibratory mill with cylindrical zirconia media on the powder characteristics of the subsequent processing stages. A commercial ZnO varistor formulation was used. The subsequent processing stages that are given particular …

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Full-Wave Emc Simulations Using Maxwell Garnett Model For Composites With Cylindrical Inclusions, M. H. Nisanci, F. De Paulis, Marina Koledintseva, A. Orlandi Oct 2011

Full-Wave Emc Simulations Using Maxwell Garnett Model For Composites With Cylindrical Inclusions, M. H. Nisanci, F. De Paulis, Marina Koledintseva, A. Orlandi

Electrical and Computer Engineering Faculty Research & Creative Works

Four different models for effective dielectric properties of biphasic composite containing random or aligned cylindrical inclusions are considered in this paper. These models are based on the Maxwell Garnett (MG) mixing rule. The effects of distribution and orientation of cylindrical inclusions in a composite material is studied. An equivalent averaged material with Debye-like frequency characteristics, suitable for time-domain full-wave numerical electromagnetic simulations is retrieved. This Debye model is derived from the Maxwell Garnett formulation. The numerical model test structure consists of a composite slab inserted in a rectangular waveguide. Simulations are run for the frequency range above the cut-off frequency …

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A Novel Characterization Method Of The Radiation Emission For Electromagnetic Compatibility, Ping Li, Lijun Jiang Oct 2011

A Novel Characterization Method Of The Radiation Emission For Electromagnetic Compatibility, Ping Li, Lijun Jiang

Electrical and Computer Engineering Faculty Research & Creative Works

Conventionally the radiation emissions from PCB boards, electronic devices and antennas were characterized through the near field (NF)-far field (FF) transformation to find the equivalent sources. In this paper, a new methodology without NF-FF transformation is presented. Based on the uniqueness theorem, it only employs the measured tangential field over a spherical surface to rigorously characterize the outward radiation emission. The dyadic Green's function for the perfect magnetic conductor (PMC) sphere is derived using spherical wave functions. Based on this dyadic Green's function and integral equations, the NF-FF transformation is not necessary any more. To facilitate feasible near field measurements, …

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Multipoint Model Order Reduction Of Delayed Peec Systems, Francesco Ferranti, Michel Nakhla, Giulio Antonini, Tom Dhaene, Luc Knockaert, Albert E. Ruehli Oct 2011

Multipoint Model Order Reduction Of Delayed Peec Systems, Francesco Ferranti, Michel Nakhla, Giulio Antonini, Tom Dhaene, Luc Knockaert, Albert E. Ruehli

Electrical and Computer Engineering Faculty Research & Creative Works

We present a new model order reduction technique for electrically large systems with delay elements, which can be modeled by means of neutral delayed differential equations. an adaptive multipoint expansion and model order reduction of equivalent first order systems are combined in the new proposed method that preserves the neutral delayed differential formulation. an adaptive algorithm to select the expansion points is presented. the proposed model order reduction technique is validated by pertinent numerical results. a comparison with a previous model order reduction algorithm based on a single point expansion is performed to show the considerably improved modeling capability of …

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Statistical Estimation Of Root Mean Square Crosstalk In Sfp+ Cable Evaluations, Dazhao Liu, Jue Chen, Zhiping Yang, Jun Fan Oct 2011

Statistical Estimation Of Root Mean Square Crosstalk In Sfp+ Cable Evaluations, Dazhao Liu, Jue Chen, Zhiping Yang, Jun Fan

Electrical and Computer Engineering Faculty Research & Creative Works

A rigorous statistical estimation of the root mean square equation is proposed for near-end crosstalk simulation in SFP+ cable evaluations. This method employs the pulse response, the near-end output in the victim pair due to a single-pulse input of one bit long in the aggressor pair. This pulse response can be obtained from vector network analyzer (VNA) measurements. Thus SFP+ cable evaluations can be effectively performed using easier and more accurate frequency-domain measurements, instead of the time-domain ones defined in the specification. © 2011 IEEE.

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Skin-Effect Model For Time And Frequency Domain Peec Solver, Giulio Antonini, Albert E. Ruehli Oct 2011

Skin-Effect Model For Time And Frequency Domain Peec Solver, Giulio Antonini, Albert E. Ruehli

Electrical and Computer Engineering Faculty Research & Creative Works

A challenging issue for the solution of large electromagnetic problems is the efficient modeling of the broadband skin-effect for conducting planes and 3D shapes. the inclusion of such models in an EM solver can be very costly in compute time and memory requirements. Progress has recently been made in the design of skin-effect models. Several properties of a model are desirable for the solution of practical problems such as the broadband frequency domain or the time domain applicability. in this paper, we present a new model which meets some of these challenges and which is suitable for the PEEC solution …

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Characterization And Modeling Of A Grid-Connected Photovoltaic System Using A Recurrent Neural Network, Daniel M. Riley, Ganesh K. Venayagamoorthy Oct 2011

Characterization And Modeling Of A Grid-Connected Photovoltaic System Using A Recurrent Neural Network, Daniel M. Riley, Ganesh K. Venayagamoorthy

Electrical and Computer Engineering Faculty Research & Creative Works

Photovoltaic (PV) system modeling is used throughout the photovoltaic industry for the prediction of PV system output under a given set of weather conditions. PV system modeling has a wide range of uses including: prepurchase comparisons of PV system components, system health monitoring, and payback (return on investment) times. in order to adequately model a PV system, the system must be characterized to establish the relationship between given weather inputs (e.g., irradiance, spectrum, temperature) and desired system outputs (e.g., AC power, module temperature). Traditional approaches to system characterization involve characterizing and modeling each component in a PV system and forming …

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High Frequency Permeability Of Fe-Al-Si Granular Composite Materials, Takanori Tsutaoka, Taisuke Ono, Aiko Tsurunaga, Teruhiro Kasagi, Kenichi Hatakeyama, Marina Koledintseva Oct 2011

High Frequency Permeability Of Fe-Al-Si Granular Composite Materials, Takanori Tsutaoka, Taisuke Ono, Aiko Tsurunaga, Teruhiro Kasagi, Kenichi Hatakeyama, Marina Koledintseva

Electrical and Computer Engineering Faculty Research & Creative Works

High-frequency electromagnetic properties of Fe-Al-Si alloy (Sendust) granular composite materials have been studied by measuring their relative complex permeability (μr = μr’ – jμr”) and permittivity (εr = εr’ – j εr”) spectra. The bulk Fe-Al-Si alloy shows metallic electrical conduction, and permeability decreases rapidly with frequency. On the other hand, Sendust powder shows relatively high electrical resistivity. Sendust composite material demonstrates insulating electrical properties up to at least 80 vol.% particle content. Thus the relatively high permeability in the microwave frequency range can be obtained. Frequency dispersion characteristics of …

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Analysis Of Via Impedance Variations With A Polynomial Chaos Method, Jianxiang Shen, Hanfeng Wang, Ji Chen, Jun Fan Oct 2011

Analysis Of Via Impedance Variations With A Polynomial Chaos Method, Jianxiang Shen, Hanfeng Wang, Ji Chen, Jun Fan

Electrical and Computer Engineering Faculty Research & Creative Works

In this paper, we propose a systematic framework for the optimization and analysis of the equivalent characteristic impedance of practical via structures. the framework consists of (a) optimizing via structures for impedance matching using a Genetic algorithm, and (b) numerically characterize, by Polynomial Chaos (PC) method, the sensitivity of the equivalent characteristic impedance to the manufacturing uncertainties in the various geometrical parameters of a via structure. the PC method can be effectively used to compute important statistical information, such as moments, probabilities and sensitivities with respect to the design variables. the PC method is straightforward to implement and can be …

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Parametric Study On The Effect Of Asymmetry In Multi-Channel Differential Signaling, Ki Jin Han, Xiaoxiong Gu, Young H. Kwark, Zhenwei Yu, Dazhao Liu, Bruce Archambeault, Samuel R. Connor, Jun Fan Oct 2011

Parametric Study On The Effect Of Asymmetry In Multi-Channel Differential Signaling, Ki Jin Han, Xiaoxiong Gu, Young H. Kwark, Zhenwei Yu, Dazhao Liu, Bruce Archambeault, Samuel R. Connor, Jun Fan

Electrical and Computer Engineering Faculty Research & Creative Works

The effects of geometric asymmetry on the electrical performance of multi-channel differential signaling in printed circuit boards are investigated in this paper. the asymmetry, which is the origin of noise coupled through mode conversion, is difficult to control in real channel structures, where a large number of vias and traces are populated. Supported by an efficient parametric simulation tool, this paper presents the effects of the asymmetry on mode conversion and differential mode crosstalk in real multi-channel structures. This extensive parametric study was used to define design guidelines to suppress this noise coupling by adding ground vias in strategic locations. …

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Optimizing Decoupling Capacitor Placement To Reduce Effective Inductance, Bruce Archambeault, Jingook Kim, Sam Connor, Jun Fan Oct 2011

Optimizing Decoupling Capacitor Placement To Reduce Effective Inductance, Bruce Archambeault, Jingook Kim, Sam Connor, Jun Fan

Electrical and Computer Engineering Faculty Research & Creative Works

Optimizing decoupling capacitor placement to ensure rapid charge delivery is discussed in this paper. Placing additional decoupling capacitors in close proximity may reduce effective inductance but this inductance is only reduced under certain conditions. © 2011 IEEE.

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Modeling And Analysis Of A Trace Referenced To A Meshed Ground Plane, Songping Wu, Hao Shi, Matthew Herndon, Bill Cornelius, Matt Halligan, Jun Fan Oct 2011

Modeling And Analysis Of A Trace Referenced To A Meshed Ground Plane, Songping Wu, Hao Shi, Matthew Herndon, Bill Cornelius, Matt Halligan, Jun Fan

Electrical and Computer Engineering Faculty Research & Creative Works

Meshed planes are used in today's flexible PCB designs, and due to their non-homogeneous nature, Modeling of nearby interconnects increases in complexity. in this paper, a method to evaluate the effective characteristic impedance of a trace referenced to a meshed plane is proposed that is simpler and optimization based. the effective impedance and the per-unit-length parameters of the line were associated with the meshed plane periodical patterns as well as trace relative locations. a systematic study was performed to reveal the essential relationship between the meshed plane geometric parameters and the trace characteristics. © 2011 IEEE.

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Measurement Of Multiple Switching Current Components Through A Bulk Decoupling Capacitor Using A Lab-Made Low-Cost Current Probe, Liang Li, Jingook Kim, Hanfeng Wang, Songping Wu, Yuzo Takita, Hayato Takeuchi, Kenji Araki, Jun Fan Oct 2011

Measurement Of Multiple Switching Current Components Through A Bulk Decoupling Capacitor Using A Lab-Made Low-Cost Current Probe, Liang Li, Jingook Kim, Hanfeng Wang, Songping Wu, Yuzo Takita, Hayato Takeuchi, Kenji Araki, Jun Fan

Electrical and Computer Engineering Faculty Research & Creative Works

This paper presents a measurement-Based data-processing approach to obtain parameters of multiple current components through a bulk decoupling capacitor for power integrity studies. a lab-made low-cost current probe is developed to measure the induced voltage due to the time-varying switching current. Then, a post data-processing procedure is introduced to separate and obtain the parameters of multiple current components. the results obtained by the proposed method are validated with other approaches. © 2011 IEEE.

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Near-Field H To E Transformation Using Plane Wave Spectrum Theory, Zhenwei Yu, Yaojiang Zhang, Soji Sajuyigbe, R. Camacho, Jason A. Mix, Kevin Slattery, Matthew S. Halligan, Jun Fan Oct 2011

Near-Field H To E Transformation Using Plane Wave Spectrum Theory, Zhenwei Yu, Yaojiang Zhang, Soji Sajuyigbe, R. Camacho, Jason A. Mix, Kevin Slattery, Matthew S. Halligan, Jun Fan

Electrical and Computer Engineering Faculty Research & Creative Works

Near-field measurements are widely used to indicate the radiation from integrated circuits (IC). to minimize the number of field components measured in a near-field scan, it is necessary to calculate the electric field from magnetic field or vice versa. in this paper, a method based on plane wave spectrum theory is proposed to perform the H to E transformation, and a filtering technique is proposed to address the noise problem in the calculation. a simple active circuit in a 3-D full-wave simulation tool is used to validate this method. This method is useful to reduce the number of field components …

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Estimation Of Crosstalk Among Multiple Stripline Traces Crossing A Split By Compressed Sensing, Tao Wang, Yiyu Shi, Songping Wu, Jun Fan Oct 2011

Estimation Of Crosstalk Among Multiple Stripline Traces Crossing A Split By Compressed Sensing, Tao Wang, Yiyu Shi, Songping Wu, Jun Fan

Electrical and Computer Engineering Faculty Research & Creative Works

In printed circuit board (PCB) designs, it is common to split power/ground planes into different partitions, which leads to more crosstalk among signal traces that route crossing a split. It is of general interest to develop a crosstalk model for various geometric parameters. However, the long time required to simulate the structure with any given set of geometric parameters renders general modelling approaches such as interpolation inefficient. in this paper, we develop an empirical model based upon the compressed sensing technique to characterize the crosstalk among traces as a function of geometric parameters. a good agreement between the empirical model …

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Transient Response Of Long Bubbles In Volatile Organic Compounds, Cheng-Hsing Hsu, Ching-Chuan Chang, Chia-Chuan Kuo, Kuang-Yuan Kung Oct 2011

Transient Response Of Long Bubbles In Volatile Organic Compounds, Cheng-Hsing Hsu, Ching-Chuan Chang, Chia-Chuan Kuo, Kuang-Yuan Kung

Journal of Marine Science and Technology–Taiwan

A mass flow controller (MFC) was used to control the injection gas amount into volatile organic compounds (VOCs), each having a different evaporation rate, within straight tubes. As the moving velocities of the air bubbles within the straight tube had changed, a specific transient response occurred. The transient shape was a mushroom bubbles. From the experiment results, as the evaporation rate of VOCs ≧ 1, mushroom bubbles occur as the Reynolds number (Re) of the moving air bubbles reach a certain region. Moreover, the shapes mushroom bubbles were more apparent when volatility of the solvent was higher. As VOCs evaporation …

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Reconsideration For A Study Of The Effect Of Chloride Binding On Service Life Predictions, Ming-Te Liang, Ran Huang, Hao-Yuan Jheng Oct 2011

Reconsideration For A Study Of The Effect Of Chloride Binding On Service Life Predictions, Ming-Te Liang, Ran Huang, Hao-Yuan Jheng

Journal of Marine Science and Technology–Taiwan

The major purpose of this paper is to use Kirchhoff's transformation associated with Laplace's transformation methods to obtain the analytical solution of the modified Fick's second law of nonlinear diffusion equation with initial and boundary conditions provided by Martín-Pérez et al. [A study of the effect of chloride binding on service life predictions. Cement and Concrete Research 2000; 30 (8): 1215-1223]. Based on experimented data and four kinds of chloride binding isotherm, i.e., no, linear, Langmuir, and Freundlich binding, results of free and total chloride concentration profiles calculated from the analytical solution are presented for a concrete structure suffered from …

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The Modified Collocation Trefftz Method And Laplacian Decomposition For Solving Two-Dimensional Stokes Problems, Chia-Ming Fan, Hong-Huei Li, Chung-Lun Kuo Oct 2011

The Modified Collocation Trefftz Method And Laplacian Decomposition For Solving Two-Dimensional Stokes Problems, Chia-Ming Fan, Hong-Huei Li, Chung-Lun Kuo

Journal of Marine Science and Technology–Taiwan

In this paper, the two-dimensional Stokes problem is analyzed by the modified collocation Trefftz method (MCTM) and the Laplacian decomposition. The coupled Stokes equations are converted to three Laplace equations by utilizing the Laplacian decomposition and then the boundary-type meshless MCTM is adopted to solve the resultant Laplace equations. The MCTM, free from mesh and numerical quadrature, is derived from the conventional Trefftz method by considering the characteristic length of the domain, which stabilize the numerical scheme and obtain highly accurate results. Besides, the solutions are expressed as the linear combination of T-complete functions and the velocity as well as …

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Fabrication Of Size-Tunable Metallic Nanoparticles Using Plasmid Dna As A Biomolecular Reactor, Jacopo Samson, Irene Piscopo, Alex Yampolski, Patrick Nahirney, Andrea Parpas, Amit Aggarwal, Raihan Saleh, Charles Michael Drain Oct 2011

Fabrication Of Size-Tunable Metallic Nanoparticles Using Plasmid Dna As A Biomolecular Reactor, Jacopo Samson, Irene Piscopo, Alex Yampolski, Patrick Nahirney, Andrea Parpas, Amit Aggarwal, Raihan Saleh, Charles Michael Drain

Publications and Research

Plasmid DNA can be used as a template to yield gold, palladium, silver, and chromium nanoparticles of different sizes based on variations in incubation time at 70 °C with gold phosphine complexes, with the acetates of silver or palladium, or chromium acetylacetonate. The employment of mild synthetic conditions, minimal procedural steps, and aqueous solvents makes this method environmentally greener and ensures general feasibility. The use of plasmids exploits the capabilities of the biotechnology industry as a source of nanoreactor materials.

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Overcoming The Negative Frequencies - Instantaneous Frequency And Amplitude Estimation Using Osculating Circle Method, Ming-Kuang Hsu, Jiun-Chyuan Sheu, Cesar Hsue Oct 2011

Overcoming The Negative Frequencies - Instantaneous Frequency And Amplitude Estimation Using Osculating Circle Method, Ming-Kuang Hsu, Jiun-Chyuan Sheu, Cesar Hsue

Journal of Marine Science and Technology–Taiwan

There are many methods able to extract the instantaneous frequencies from a time series for practical applications. Gabor's method is one of the most popular and simple methods. For wide band time series, Gabor's method may produce negative frequencies. The limitation of Gabor's method is that, in order to avoid resulting with negative frequencies, it can only be applied to time series with mono component and near zero mean. In this paper, a new method that does not generate negative frequencies, the Osculating Circle (OC) Method, is presented. The OC method is based on Gabor's method but with modified unwrapped …

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Deformations Of Crystal Frameworks, Ciprian Borcea, Ileana Streinu Oct 2011

Deformations Of Crystal Frameworks, Ciprian Borcea, Ileana Streinu

Computer Science: Faculty Publications

We apply our deformation theory of periodic bar-and-joint frameworks to tetrahedral crystal structures. The deformation space is investigated in detail for frameworks modelled on quartz, cristobalite and tridymite.

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Long-Term Predictive Value Interval With The Fuzzy Time Series, Ming-Tao Chou Oct 2011

Long-Term Predictive Value Interval With The Fuzzy Time Series, Ming-Tao Chou

Journal of Marine Science and Technology–Taiwan

This paper presents a new mathematical method to construct a fuzzy time series model of a system where the fuzzy support and interval values are used. This paper further presents an improved fuzzy time series model with a long-term predictive value interval and shows that the proposed definition can be used for long-term forecasting. The enrollment data of the University of Alabama (adopted by Song and Chissom, 1993) are used to demonstrate the proposed forecast model.

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Selecting Ports And Terminal Operators - An Application Of Pso, Tzay-An Shiau, Li-Mei Lin, Ding-Hsun Hsiao Oct 2011

Selecting Ports And Terminal Operators - An Application Of Pso, Tzay-An Shiau, Li-Mei Lin, Ding-Hsun Hsiao

Journal of Marine Science and Technology–Taiwan

Past literature has mostly discussed port selection. However, within a given region, any port which meets a carrier’s threshold conditions is eligible for consideration, and a terminal operator at any of these ports is a candidate for entering into a contract with the carrier. The choice is not restricted to terminal operators at a single given port. Thus the choice of terminal operator between ports within a given region is an important issue in the decision-making process and has rarely been addressed in the literature. The main purpose of this paper is to examine a situation in which all ports …

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Electron Energy Distribution Control, Wade Harlow Oct 2011

Electron Energy Distribution Control, Wade Harlow

Von Braun Symposium Student Posters

No abstract provided.

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Aerial Rendezvous Between An Unmanned Air Vehicle And An Orbiting Target Vehicle, Mark Andrew Owen Oct 2011

Aerial Rendezvous Between An Unmanned Air Vehicle And An Orbiting Target Vehicle, Mark Andrew Owen

Theses and Dissertations

In this thesis we develop methods that facilitate an aerial rendezvous between two air vehicles. The objective of this research is to produce a method that can be used to insert a miniature air vehicle behind a rendezvous vehicle and then track that vehicle to enable a visual rendezvous. For this research we assume the rendezvous vehicle is following a relatively stable and roughly elliptical orbit. Path planners and controllers have been developed that can be used to effectively intercept the rendezvous vehicle by inserting the MAV onto the orbit of interest. A method for planning and following time-optimal Dubins …

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