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Relevant bibliographies by topics / Helicopters – Design and construction – Estimates

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Academic literature on the topic 'Helicopters – Design and construction – Estimates'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Helicopters – Design and construction – Estimates"

1

Cai, Guowei, Lin Feng, Ben M. Chen, and Tong H. Lee. "Systematic design methodology and construction of UAV helicopters." Mechatronics 18, no. 10 (2008): 545–58. http://dx.doi.org/10.1016/j.mechatronics.2008.05.011.

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Bisták, Andrej, and Zdenka Hulínová. "Construction of ropeways in Slovakia in terms of pre-construction design using helicopters (case study)." MATEC Web of Conferences 263 (2019): 01002. http://dx.doi.org/10.1051/matecconf/201926301002.

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Ropeways usually provide access to locations inaccessible to other means of transport. Due to this fact, the construction of ropeways is extraordinarily taxing in terms of both, technology and logistics. The site location is often in terrain difficult to access, which often precludes deployment of common construction mechanisms in ropeway construction. In such case, it is advisable to deploy a transport mechanism independent of the terrain – a helicopter. Functioning as “flying cranes“, the helicopters have been used in construction industry in Slovakia for six decades now. Having amassed posi

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Davidson, Gary, Tim Roberts, and Darren Savoye. "Skid Helicopters on High-Speed Craft." Journal of Ship Production 21, no. 02 (2005): 108–25. http://dx.doi.org/10.5957/jsp.2005.21.2.108.

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Helicopter decks are common throughout the commercial and military shipping industries and also the offshore industry. Construction in steel and aluminum is common. Helicopter decks on high-speed craft are not common. The first known helicopter deck installed on a high-speed craft was on an Incat wave-piercing catamaran, HSV X1, Joint Venture, which saw service during the recent Gulf war and is currently still in service with the US Army. Following successful construction and NAVAIR certification of Joint Venture, a more advanced aluminum deck, certified also by NAVAIR and Naval Sea Systems Co

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Peng, Chen, Bo Zhu, and Keqi Wei. "Design and Experimental Verification of Robust Motion Synchronization Control with Integral Action." Mathematical Problems in Engineering 2016 (2016): 1–14. http://dx.doi.org/10.1155/2016/7324508.

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A robust attitude motion synchronization problem is investigated for multiple 3-degrees-of-freedom (3-DOF) helicopters with input disturbances. The communication topology among the helicopters is modeled by a directed graph, and each helicopter can only access the angular position measurements of itself and its neighbors. The desired trajectories are generated online and not accessible to all helicopters. The problem is solved by embedding in each helicopter some finite-time convergent (FTC) estimators and a distributed controller with integral action. The FTC estimators generate the estimates

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KACHEL, Stanisław, Robert ROGÓLSKI, and Jakub KOCJAN. "Review of Modern Helicopter Constructions and an Outline of Rotorcraft Design Parameters." Problems of Mechatronics Armament Aviation Safety Engineering 12, no. 3 (2021): 27–52. http://dx.doi.org/10.5604/01.3001.0015.2427.

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This work contains the results of a modern helicopter construction analysis. It includes the comparison of almost seventy rotorcraft constructions in terms of size in line with EASA requirements – large and small helicopters. The helicopters are also divided because of a mission purpose. The proposed division for large aircrafts is: transport, multipurpose, attack and for small aircrafts: observation, training, and utility. The aircraft construction features are described. Average dimension values of airframes and rotors are shown. Helicopter rotor arrangements are presented in terms of an ope

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Balakchina, O., and V. Shalenny. "Design organization and construction implementation of the installation and reconstruction technology using helicopters." IOP Conference Series: Materials Science and Engineering 913 (September 12, 2020): 042039. http://dx.doi.org/10.1088/1757-899x/913/4/042039.

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Singh, Anvinder, and Varun Sharma. "DESIGN ANALYSIS AND CONSTRUCTION OF ENERGY HARVESTING COAXIAL HELICOPTER." Aviation 17, no. 4 (2013): 145–49. http://dx.doi.org/10.3846/16487788.2013.861230.

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With the growing need for technology, the tendency for errors has increased many times, which often results in loss of human lives. Our main aim of this paper is to show the implementation of a coaxial rotor aerial vehicle that can be controlled by a radio frequency transmitter. The helicopter is capable of manoeuvring in an area where real helicopters cannot. The area could be a flooded region, a place hit by an earthquake, or a building on fire. The main aim is to transmit video of that place to a base station by the camera attached to the helicopter. Various factors required to make a safe

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Szafran, Krzysztof, and Marcin Michalczyk. "Various Types of The Rotorcraft Design in the Context of Aerospace Regulations." Transactions on Aerospace Research 2018, no. 1 (2018): 146–53. http://dx.doi.org/10.2478/tar-2018-0010.

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Abstract In the next article on synthesis of regulations, the authors presented the general legal requirements for rotorcraft, which is limited to US regulations, because the vast majority of world regulations are based on them. The Institute of Aviation in Warsaw has developed requirements concerning the construction and operation of rotorcraft in Poland. These requirements constitute an important contribution to the regulations of the Civil Aviation Authority which are in force in the air space of the Republic of Poland. This paper presents the legal situation of rotorcraft and compares the

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Sverdlov, S. Z. "Estimation of the Time of Flight of an Electric Unmanned Helicopter Based on the Minimum Set of Parameters." Proceedings of Higher Educational Institutions. Маchine Building, no. 5 (710) (May 2019): 67–72. http://dx.doi.org/10.18698/0536-1044-2019-5-67-72.

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This article deals with the problem of forecasting the time of flight of an electric unmanned helicopter utilizing the minimum set of known parameters: the diameter and number of rotors and the flight mass. By solving this problem, it is possible to estimate the capabilities of an unmanned helicopter (multicopter), without having its full technical characteristics, which are often unavailable. In addition, when starting to design an aircraft, it is important to assess its key parameters necessary to achieve a given duration of flight, while preferably utilizing the minimum set of such paramete

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Lobão de Almeida, Thiago, and Victor Coracini Tonacio. "Passenger submarine concept design for oil production offshore systems." Ciencia y tecnología de buques 4, no. 8 (2011): 9. http://dx.doi.org/10.25043/19098642.42.

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The paper proposes an innovative solution to transport workers of offshore oil production platforms from the coast to their units, which operate at the Pre-Salt exploration, 300 km from the coast. A passenger submarine concept design was developed, justified by the range of practical obstacles observed in the current modes of transportation, helicopters and supply boats. Requirements like operational depth (100 m), passenger capacity (250 people), and cruising speed (minimum 13.4 knots) are defined, based on estimates. Firstly, it seeks the adoption of air-independent propulsion (AIP) systems,

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Dissertations / Theses on the topic "Helicopters – Design and construction – Estimates"

1

Kim, Ho-Sik. "Conceptual design optimization for military helicopter maneuverability and agility." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/11969.

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Tai, Jimmy C. M. "A multidisciplinary design approach to size stopped rotor/wing configurations using reaction drive and circulation control." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/13460.

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Tatossian, Charles A. "Aerodynamic shape optimization via control theory of helicopter rotor blades using a non-linear frequency domain approach." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=112586.

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This study presents a discrete adjoint-based aerodynamic optimization algorithm for helicopter rotor blades in hover and forward flight using a Non-Linear Frequency Domain approach. The goal is to introduce a Mach number variation into the Non-Linear Frequency Domain (NLFD) method and implement a novel approach to present a time-varying cost function through a multi-objective adjoint boundary condition. The research presents the complete formulation of the time dependent optimal design problem. The approach is firstly demonstrated for the redesign of a NACA 0007 and a NACA 23012 helicopter rot

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Baker, Andrew Paul. "The role of mission requirements, vehicle attributes, technologies and uncertainty in rotorcraft system design." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/12476.

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Visagie, Jonathan Gerhardus. "Stability and control characteristics of model helicopters." Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/50102.

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Thesis (MScEng)--University of Stellenbosch, 2004.<br>ENGLISH ABSTRACT: A need exists for the development of an unmanned rotorcraft capable of autonomous flight, as would be required for the survey of high voltage electricity supply lines. A program was initiated at the University of Stellenbosch in December 2002 in order to develop such an aircraft. The first goal of this thesis was the development of software that could calculate the stability and control derivatives of a model helicopter. These derivatives could then be used in the formulation of an appropriate helicopter control s

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Yue, Andrew. "H∞-design and the improvement of helicopter handling qualities." Thesis, University of Oxford, 1988. http://ora.ox.ac.uk/objects/uuid:4468a3ab-7297-4363-b605-b3e1f301d11b.

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This thesis presents the results of a study into the use of H<sup>ꝏ</sup>-optimization for the design of feedback control laws for improving the handling qualities of a Lynx helicopter. An important improvement to the H<sup>ꝏ</sup>-optimization procedure is the reduction in the number of iterative steps in the γ-iteration before convergence to the optimal γ. Some new algorithms are derived which significantly reduce the computation time for the γ-iteration. Both 2-block and 4-block cases are considered. Control laws are designed for precise control of pitch and roll attitude, yaw rate and heav

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Davis, Joseph Hutson. "Design Methodology for Developing Concept Independent Rotorcraft Analysis and Design Software." Thesis, Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/19721.

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Throughout the evolution of rotorcraft design, great advancements have been made in developing performance analysis and sizing tools to assist designers during the preliminary and detailed design phases. However, very few tools exist to assist designers during the conceptual design phase. Most performance analysis tools are very discipline or concept specific, and many are far too cumbersome to use for comparing vastly different concepts in a timely manner. Consequently, many conceptual decisions must be made qualitatively. A need exists to develop a single software tool which is capable o

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Thériault, France. "Optimized design of a composite helicopter structure by resin transfer moulding." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=99795.

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This research project is partnership project involving industrial, university and government collaborators. The overall objective is to develop and enhance tools for use in Resin Transfer Moulding (RTM) design technology in order to re-design existing metallic parts using composite materials.<br>The specific objective of this work is to present preliminary research findings of the development of an optimized design of a leading edge slat (horizontal stabilizer component) from the Bell Model 407 Helicopter. The results presented here focus on the static stress analysis and the structure design

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Johnson, Kevin Lee. "Prediction of operational envelope maneuverability effects on rotorcraft design." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47601.

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Military helicopter operations require precise maneuverability characteristics for performance to be determined for the entire helicopter flight envelope. Historically, these maneuverability analyses are combinatorial in nature and involve human-interaction, which hinders their integration into conceptual design. A model formulation that includes the necessary quantitative measures and captures the impact of changing requirements real-time is presented. The formulation is shown to offer a more conservative estimate of maneuverability than traditional energy-based formulations through quantitat

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Suhr, Stephen Andrew. "Preliminary Turboshaft Engine Design Methodology for Rotorcraft Applications." Thesis, Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14128.

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In the development of modern rotorcraft vehicles, many unique challenges emerge due to the highly coupled nature of individual rotorcraft design disciplines therefore, the use of an integrated product and process development (IPPD) methodology is necessary to drive the design solution. Through the use of parallel design and analysis, this approach achieves the design synthesis of numerous product and process requirements that is essential in ultimately satisfying the customers demands. Over the past twenty years, Georgia Techs Center for Excellence in Rotorcraft Technology (CERT) has contin

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Books on the topic "Helicopters – Design and construction – Estimates"

1

Scarborough, Kate. Helicopters. Barron's, 1994.

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Prouty, Raymond W. Military helicopter design technology. Krieger Pub. Co., 1998.

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Military helicopter design technology. Jane's Defence Data, 1989.

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Atcheson, Daniel Benn. Roofing construction & estimating. Craftsman Book Co., 1995.

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Turner, R. Gregory. Construction economics and building design: A historical approach. Van Nostrand Reinhold, 1986.

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White, Graham. 3600 HP split torque helicopter transmission: Final report. National Aeronautics and Space Administration, Lewis Research Center, 1985.

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Konstantinovich, Martynov Apollinariĭ, та Sovetskoe nat͡sionalʹnoe obʺedinenie istorikov estestvoznanii͡a i tekhniki. Komissii͡a po razrabotke nauchnogo nasledii͡a B.N. I͡Urʹeva., ред. Trudy nauchnykh chteniĭ, posvi͡ashchennykh pami͡ati akademika V.N. I͡Urʹeva, Moskva, 12-14 noi͡abri͡a 1984 g.: Teoreticheskie osnovy vertoletostroenii͡a i proektirovanii͡a vertoletov. [s.n.], 1986.

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Zhang, Chenglin. Zhi sheng ji zong ti she ji. Guo fang gong ye chu ban she, 2006.

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Bakhov, O. P. Aėrouprugostʹ i dinamika konstrukt͡s︡ii vertoleta. "Mashinostroenie", 1985.

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V, Mikheev S., ed. Konstrukt︠s︡ii︠a︡ vertoletov. Izd-vo MAI, 2001.

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Book chapters on the topic "Helicopters – Design and construction – Estimates"

1

Cretu, Ovidiu, Robert Stewart, and Terry Berends. "Project Cost and Schedule Estimates." In Risk Management for Design and Construction. John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118984017.ch2.

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Fragkakis, Nikolaos, Sergios Lambropoulos, and John-Paris Pantouvakis. "A Computer-Aided Conceptual Cost Estimating System for Pre-Stressed Concrete Road Bridges." In Civil and Environmental Engineering. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-4666-9619-8.ch024.

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The need for an environmentally friendly design of modern motorways increases the construction of bridges, which has exhibited substantial overruns above estimated costs. Therefore, easy to use, inexpensive and accurate methods for conceptual cost estimating are needed. This paper presents a computer-aided cost estimating system for pre-stressed concrete road bridges that provides estimates of the material quantities and cost of all bridge elements. It relies on a database incorporating actual data collected from recently constructed bridges and exploits material estimating models developed with statistical analysis. Different configurations are devised from short to long-span bridges, accounting for the major deck construction methods and foundation systems. The system can be easily used to provide different cost estimates to the owner, designer and contractor during the project's early stages. By allowing reliable cost estimates in a short time, the proposed computer-aided system represents a useful decision making tool.

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Blackwell, Louisa, and Nicola Jane Rogers. "A Longitudinal Error Framework to Support the Design and Use of Integrated Datasets." In Measurement Error in Longitudinal Data. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780198859987.003.0003.

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This chapter aims to contribute to the evolving literature on the use of administrative data for statistical purposes. It describes two frameworks for understanding statistical error. The first applies to single administrative sources that may be longitudinal in nature. The second applies to multiple sources that have been longitudinally linked. These frameworks support statistical design and the evaluation of administrative data quality. They may also support the construction of population estimates based on administrative data and possibly survey data in countries that do not have population registers. The frameworks were applied in the transformation of the population and migration statistics system at the UK Office for National Statistics. The chapter draws a distinction between operational and statistical data quality, demonstrating the tensions that can exist between these distinct uses of the same information.

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"Life Prediction for Boiler Components." In Damage Mechanisms and Life Assessment of High-Temperature Components. ASM International, 1989. http://dx.doi.org/10.31399/asm.tb.dmlahtc.t60490183.

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Abstract This chapter covers the failure modes and mechanisms associated with boiler components and the tools and techniques used to assess damages and predict remaining component life. It begins with a review of the design and operation of a utility boiler and the materials used in construction. It then describes the various causes of failure in boiler tubes, headers, and steam pipes, explaining how and why they occur, how they are diagnosed, and how to mitigate their effects. The final and by far largest section in the chapter is a tutorial on damage and life assessment techniques for boiler components and assemblies. It demonstrates the use of various methods, including analytical techniques that estimate life expenditure based on operating history, component geometry, and material properties; predictive methods based on the extrapolation of failure statistics; methods that predict life based on dimensional measurements; methods based on metallographic studies; methods based on temperature estimates; and a method for estimating remaining life under creep conditions based on stress-rupture testing of service-exposed material samples. The chapter also discusses the use of fracture mechanics and presents a number of cases in which life assessments are made based on the integration of several methods.

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"Paddlefish Management, Propagation, and Conservation in the 21st Century." In Paddlefish Management, Propagation, and Conservation in the 21st Century, edited by STEVEN B. DONABAUER, JOSEPH N. STOECKEL, and JEFFREY W. QUINN. American Fisheries Society, 2009. http://dx.doi.org/10.47886/9781934874127.ch8.

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<em>Abstract</em>.—We assessed potential impacts of harvest and proposed channel modifications on the paddlefish <em>Polyodon spathula </em>fishery of Ozark Lake, Arkansas River, Arkansas. Ultrasonic telemetry was used to determine commercial and recreational exploitation rates, survival, spawning locations, and habitat use of gravid female paddlefish. Monthly searches were conducted for 40 tagged fish and we recorded 862 locations in Ozark Lake from January 2004 through December 2005. Adjacent reservoirs (i.e., Pool 13 and Lake Dardanelle) were tracked periodically, but interpool movement was not detected. Commercial fishing exploitation was determined at a mandatory check station and was estimated to be 30% during a 5-d special season. Annual recreational snag-fishing exploitation estimates were 8% (2004) and 3% (2005). Survival was different between years and was much lower the year (2004) with a commercial fishing season. Kaplan-Meier staggered-design survival estimates (±95% confidence interval [CI]) for 2004, 2005, and 2004 through 2005 were 0.60 ± 0.19, 0.92 ± 0.11, and 0.55 ± 0.18, respectively. With commercial and recreational harvests omitted from the analysis, the estimated 2-year survival rate was 0.91 ± 0.13 (±95% CI), which corresponds to 5% annual natural mortality. Gravid females migrated a median distance of 33 and 32 km in the spring of 2004 and 2005 and likely spawned in the tailwater of James W. Trimble Lock and Dam from late March to early April. Successful paddlefish reproduction was verified by capture of 23 prolarvae. Paddlefish selected tributary mouth habitat in all seasons (59% of locations). Tailwater and inundated creek channel habitats were selected in spring and summer, respectively. A navigation project to deepen the channel from 2.7 to 3.7 m will impact approximately 50% of the tailwater spawning habitat. Channel modifications (i.e., dredging and dike construction) near the mouth of the Mulberry River may disturb an important tributary mouth habitat for paddlefish where 55% of all locations were recorded. Our study identified biologically important habitats that need conservation and indicates that commercial harvest was the primary source of mortality for gravid female paddlefish in Ozark Lake.

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Conference papers on the topic "Helicopters – Design and construction – Estimates"

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Rodriguez, Jonathan, Luc Gaudiller, Simon Chesne, and Paul Cranga. "Control of a Helicopter Main Gearbox Active Suspension System." In ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/detc2014-34278.

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This paper considers the control of a helicopter gearbox electromagnetic suspension for a complete multibody model of the structure. As the new generation of helicopters includes variable engine RPM during flight, it becomes relevant to add active control in their suspension systems. Most of active system performances derive directly from the controller construction, its optimization to the system controlled and the disturbances expected. An investigation on a FXLMS control algorithm has been made to optimize it in terms of narrow band disturbance rejection. In this paper an active suspension

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Paikun, Muhammad Kahpi, Rina Krisnawati, Andri Agustian, Randi Rohimat, and Jasmansyah. "Estimates of Material Need on Houses Construction Using Regression Model Program." In 2018 International Conference on Computing, Engineering, and Design (ICCED). IEEE, 2018. http://dx.doi.org/10.1109/icced.2018.00027.

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Torp, Olav. "How Stochastic Cost Estimates Could Be Applied in Relation to Target Value Design." In 27th Annual Conference of the International Group for Lean Construction (IGLC). International Group for Lean Construction, 2019. http://dx.doi.org/10.24928/2019/0239.

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Humphrey, T. Charles, Neil Bose, Christopher Williams, and Michael Snow. "Design and Fabrication of a Collective and Cyclic Pitch Propeller." In ASME 2004 23rd International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2004. http://dx.doi.org/10.1115/omae2004-51313.

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Helicopters achieve three-dimensional flight using a rotor capable of both collective and cyclic pitch. It was proposed that this type of propulsion system could propel and maneuver an underwater vehicle. A collective pitch and cyclic pitch propeller (CPCPP) was designed and developed as a full scale-working prototype for autonomous underwater vehicle (AUV) propulsion. This paper discusses the design and construction aspects of the CPCPP.

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Ammouri, Ali H., Issam Srour, and Ramsey F. Hamade. "Carbon Footprint Calculator for Construction Projects." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-63366.

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With the advent of awareness regarding carbon emissions and desirable reduction, this paper provides a calculator for the estimation of carbon footprint resulting from construction projects. For this purpose, we developed a software toolkit dubbed ‘Carbon Footprint Calculator for Construction Projects (CFCCP)’ capable of building a complete construction material database of carbon emissions. This is accomplished by accounting for wide range variables including construction size, landscape, and material construction. This calculator yields more accurate estimates as compared with other recently

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Henderson, J., M. Bowman, and J. Morrissey. "The Geophysical Toolbox: A Practical Approach to Pipeline Design and Construction." In 2004 International Pipeline Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/ipc2004-0190.

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Geophysical surveys map variations in physical properties of subsurface materials, many of which can have a direct impact on pipeline design and construction. This paper provides an overview of complementary geophysical methods available in the geophysical toolbox and shows, through the use of case histories, examples of the applicability of the methods for specific pipeline design and construction scenarios. In the context of pipeline design and construction, the objectives of a geophysical survey typically include one or more of the following applications: • muskeg mapping (thickness, latera

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Cheynet, Etienne, Jasna Bogunović Jakobsen, and Jónas Snæbjörnsson. "Application of Global Navigation Satellite Systems to monitor wind-induced vibrations of a suspension bridge." In IABSE Congress, Stockholm 2016: Challenges in Design and Construction of an Innovative and Sustainable Built Environment. International Association for Bridge and Structural Engineering (IABSE), 2016. http://dx.doi.org/10.2749/stockholm.2016.0057.

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A Global Navigation Satellite System (GNSS) has been deployed on the Lysefjord Bridge in Norway, to measure the static and dynamic displacement of the deck. One objective is to evaluate the systems capability to monitor accurately wind-induced vibrations in high-latitudes and mountainous terrain. GNSS measurements are compared to displacement records obtained from accelerometers located inside the bridge deck. For data of 10 minutes duration, the accelerometers were observed to monitor frequencies below 0.1 Hz with relatively poor accuracy. The GNSS measurements agreed well with the theoretica

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Lozano Galant, Jose Antonio, Maria Nogal, Jun Lei, Dong Xu, and José Turmo. "A numerical approach for structural system identification by observability techniques." In IABSE Congress, Stockholm 2016: Challenges in Design and Construction of an Innovative and Sustainable Built Environment. International Association for Bridge and Structural Engineering (IABSE), 2016. http://dx.doi.org/10.2749/stockholm.2016.0025.

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Observability techniques enable the structural system identification of static structures from a symbolic approach. The main advantage of this method is its deep mathematical foundation that enables the definition of parametric equations for the estimates. Nevertheless, this symbolic approach is not enough for the application of this method on actual structures. To fill this gap, this article presents the introduction into the symbolic structural system identification by observability techniques of a new numerical approach. This application includes the development of an algorithm that reduces

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Håkansson, L., I. Claesson, L. Pettersson, and T. Lagö. "Active Control Machine Tool Chatter Piezo Ceramic Actuators in Tool Holder Shank." In ASME 1999 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/detc99/vib-8307.

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Abstract In the turning operation chatter or vibration is a frequent problem, which affects the result of the machining, and, in particular, the surface finish. Tool life is also influenced by vibration. Severe acoustic noise in the working environment frequently occurs as a result of dynamic motion between the cutting tool and the workpiece. These problems can be reduced by active control of machine-tool vibration. Adaptive feedback control based on the filtered-x LMS-algorithm, enables a reduction of the vibration by up to 40 dB at 1.5 kHz and by approximately 40 dB at 3 kHz. The active cont

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Agar, Amritpal S., Andy J. Fry, Martin J. Goodfellow, Yee M. Goh, and Linda B. Newnes. "Expected Accuracy Range of Cost Estimates for Small Modular Reactors at the Early Concept Design Stage." In 2018 26th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/icone26-81799.

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Life cycle cost is an important consideration for the development and selection of new power generation technology. Large nuclear power plants (NPPs) have been subject to capital cost escalation, stemming from delays related to late design changes, procurement issues for major components, and regulatory enforced changes. These factors have contributed to the significant risk premium associated with gigawatt scale “Gen III+” designs, which have incurred significant financing costs. Large NPPs have become prohibitively expensive for many utility investors in liberalized markets and smaller econo

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