References of "Rana, Loveneesh 50039140"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailLow-light image enhancement of permanently shadowed lunar regions with physics-based machine learning
Moseley, Ben; Bickel, Valentin; Lopez-Francos, Ignacio et al

in Low-light image enhancement of permanently shadowed lunar regions with physics-based machine learning (2020, December)

Finding water(-ice) on the Moon is key to enabling a sustainable human presence on the Moon and beyond. There is evidence that water-ice is abundant in and around the Moon’s Permanently Shadowed Regions ... [more ▼]

Finding water(-ice) on the Moon is key to enabling a sustainable human presence on the Moon and beyond. There is evidence that water-ice is abundant in and around the Moon’s Permanently Shadowed Regions (PSRs), however, direct visual detection has not yet been possible. Surface ice or related physical features could potentially be directly detected from high-resolution optical imagery, but, due to the extremely low-light conditions in these areas, high levels of sensor and photon noise make this very challenging. In this work we generate high-resolution, low-noise optical images over lunar PSRs by using two physics-based deep neural networks to model and remove CCD-related and photon noise in existing low-light optical imagery, potentially paving the way for a direct water-ice detection method. [less ▲]

Detailed reference viewed: 88 (13 UL)
Full Text
Peer Reviewed
See detailDemonstration of a prototype design synthesis capability for space access vehicle design
Rana, Loveneesh UL; Chudoba, Bernd

in The Aeronautical Journal (2020), 124(1281), 1761-1788

The early conceptual design (CD) phase of space access vehicles (SAVs) is the most abstract, innovative and technologically challenging phase of the entire aerospace design life cycle. Although the design ... [more ▼]

The early conceptual design (CD) phase of space access vehicles (SAVs) is the most abstract, innovative and technologically challenging phase of the entire aerospace design life cycle. Although the design decision-making during this phase influences around 80 percent of the overall life cycle cost, it is the most abstract and thus least understood phase of the entire design life cycle. The history of SAV design provides numerous examples of project failures that could have been avoided if the decision-maker had had the capability to forecast the potential risks and threats correctly ahead of time during the conceptual design phase. The present study addresses this crucial phase and demonstrates a best-practice synthesis methodology prototype to advance the current state of the art of CD as applied to SAV design. Developed by the Aerospace Vehicle Design (AVD) Laboratory at the University of Texas at Arlington (UTA), the Aerospace Vehicle Design Synthesis process and software (AVDS) is a prototype solution for a flight vehicle configuration–flexible (generic) design synthesis capability that can be applied to the primary categories of SAVs. This study focusses on introducing AVDS, followed by the demonstration and verification of the system’s capability through a sizing case study based on the data-rich Boeing X-20 Dyna-Soar spaceplane. [less ▲]

Detailed reference viewed: 23 (4 UL)
Full Text
Peer Reviewed
See detailInnovative System Design Synthesis And Optimization of Re-Entry Vehicles Conceptual Design
Pate, Sweety; Rana, Loveneesh UL; Brinkman, Dennis

in Pate, Sweety; Rana, Loveneesh; Brinkman, Dennis (Eds.) Innovative System Design Synthesis And Optimization of Re-Entry Vehicles Conceptual Design (2018, October 05)

Designing a space transportation vehicle traditionally happens in a sequential manner, that is, one step at a time, passing the design from one disciplinary team to another. In this manner, the design ... [more ▼]

Designing a space transportation vehicle traditionally happens in a sequential manner, that is, one step at a time, passing the design from one disciplinary team to another. In this manner, the design goes through several iterations until the requirements from all disciplines are satisfied. The conceptual design phase is generally completed in a few weeks or months, where the main objective of the design concept is the definition of the mission-technology-configuration options that satisfy the customer’s requirements. This is achieved by evaluating multiple system design concepts and, eventually, defining the system baseline with subsystem technology, and programmatic and cost assessment. The level of detail increases enormously with the increase in the level of the design phase. Depending on the complexity of the system and the available resources, the detailed design phases may take months to years to fully design the system. From the literature study it is also observed that, although there are significant advancements in the propulsion system, landing mechanism, avionics, and interior of the spacecraft, the aerodynamic shape or vehicle configuration is still scaled or modified with respect to the heritage designs (benchmark designs: Apollo and Space Shuttle). Thus, if a poor configuration is chosen during the conceptual design phase, this will lead to a worse and expensive system at the end of the process. Hence, there is a need for an approach which allows us to explore the complete set of possible configurations rather than directly selecting the benchmark design as a starting point. This paper discusses an innovative approach for the conceptual design of re-entry vehicles. Before considering a fixed benchmark configuration of a re-entry vehicle, a design synthesis approach allows the user to explore the complete set of feasible vehicle configurations for the given mission and system requirements. Furthermore, a parametric solution-space exploration is performed to refine the set of considered configurations. This allows the user to derive the best possible solution set to start the optimization process. In this paper, simultaneous optimization of the configuration and trajectory is performed. The performance of the vehicle is computed using first-order analysis methods for mass budget, aerothermodynamics, thermal protection system, and trajectory design. Thus, this approach allows the user to investigate the best possible configuration for the mission scenario as well as derive the optimized configuration and its respective optimized trajectory to re-enter safely. [less ▲]

Detailed reference viewed: 29 (3 UL)
Full Text
Peer Reviewed
See detailA Paradigm-Shift in Aerospace Vehicle Design Synthesis and Technology Forecasting
Rana, Loveneesh UL

in Rana, Loveneesh (Ed.) A Paradigm-Shift in Aerospace Vehicle Design Synthesis and Technology Forecasting (2018, September 15)

Classically, aerospace design synthesis methodologies have been developed for a specified problem, with limited or no adaptability and expandability for application to a new problem not considered in the ... [more ▼]

Classically, aerospace design synthesis methodologies have been developed for a specified problem, with limited or no adaptability and expandability for application to a new problem not considered in the original development. This inability eventually limits the application of a conventional ASDS towards exploration of novel concepts. Thus, the institutions using their proprietary legacy ASDS systems become confined within the product and technology range which is imposed by their system’s limitations. Such a scenario presents a grave situation as it hinders innovation and exploration at the conceptual stage, the design phase where design freedom is maximum. In response to this need, a new modular system is being developed, tested, and applied at the Aerospace Vehicle Design (AVD) Laboratory at the University of Texas at Arlington. The system, called as the Aerospace Vehicle Design Database Management System (AVD-DBMS, or simply the DBMS), provides a unique capability of developing custom-tailored sizing codes specific to the problem at hand. In this regard, the DBMS is not a synthesis system by itself. Rather, it is a system that creates custom problem-specific synthesis architectures tailor made to address the needs of the user. Such a capability represents a paradigm-shift in the way conceptual design has been traditionally implemented. This paper presents an overview of the research effort of six researchers over a span of eight years. The primary focus of this paper is to provide the conceptual solution logic, the development process and system specification of the DBMS. Additionally, four distinct case-studies are presented that demonstrate DBMS’s superior capability to explore novel design concepts and provide the decision-maker with informed and smart decision-making support. [less ▲]

Detailed reference viewed: 36 (1 UL)
Full Text
See detailSPACE ACCESS SYSTEMS DESIGN: Synthesis Methodology Development for Conceptual Design of Future Space Access Systems
Rana, Loveneesh UL

Doctoral thesis (2017)

The early Conceptual Design (CD) of a Space Access System (SAS) is the most abstract, innovative, and technologically challenging phase throughout the entire aerospace product development life-cycle ... [more ▼]

The early Conceptual Design (CD) of a Space Access System (SAS) is the most abstract, innovative, and technologically challenging phase throughout the entire aerospace product development life-cycle. While it is the most important life-cycle phase which influences around 80 percent of the overall life-cycle-cost, it is also the least understood design phase. The history of space access vehicle design provides numerous examples of projects that failed due to lack of a proper technology-hardware-mission assessment in the CD phase. The present dissertation addresses this crucial phase and develops a prototype best practice solution process to advance the current state of the art of the CD oriented vehicle design synthesis systems. The solution is a generic process that can be applied to all categories of the SAS. The Vertical-Takeoff Horizontal-Landing type SAS is selected as the demonstration case-study for the solution process. The research provides a proof of concept for how the proposed prototype solution process expands the scope and application of current applications of the CD assessment vertically across the SAS system`s hierarchy and horizontally across the life-cycle phases of the SAS. [less ▲]

Detailed reference viewed: 15 (0 UL)