Relevant bibliographies by topics / Controlled rolling

Academic literature on the topic 'Controlled rolling'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Controlled rolling"

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Kvackaj,, T., J. Zrnik,, V. Vrchovinsky,, and P. Wangyao,. "Controlled Rolling of Hastelloy-N." High Temperature Materials and Processes 21, no. 6 (April 2002): 351–60. http://dx.doi.org/10.1515/htmp.2002.21.6.351.

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Li, Zhuang, Di Wu, and Ming Fu Shao. "Controlled Rolling and Controlled Cooling Technology of Fe-C-Mn-Si Multiphase Steel." Applied Mechanics and Materials 377 (August 2013): 107–11. http://dx.doi.org/10.4028/www.scientific.net/amm.377.107.

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In the present paper, controlled rolling and controlled cooling of Fe-C-Mn-Si multiphase steel was conducted by a laboratory hot rolling mill. The results show that ferrite (grey), granular bainite (black) and retained austenite (white) and/or MA islands (white) are observed in a color etched LOM micrograph. The presence of the retained austenite is confirmed by SEM observation. Controlled rolling and controlled cooling technology contributes to the improvement of the microstructure. Excellent mechanical properties for Fe-C-Mn-Si multiphase steel are attributed to the TRIP effect of the stable retained austenite.
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Feng, Guang Hong, Hong Liang Zhang, and Jian Wen Fan. "Numerical Simulation of Controlled Rolling of Thick Slab." Applied Mechanics and Materials 487 (January 2014): 522–26. http://dx.doi.org/10.4028/www.scientific.net/amm.487.522.

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The numerical simulation method was adopted to study the single-pass controlled rolling deformation process of the 400mm thick slab .Two forms of the rolling deformation which are uniform temperature rolling and rolling of temperature waiting under air cooling have been used to simulate the center strain changes of the thick slab. It was shown that: increasing the deformation of single-pass can significantly increase center strain of the thick slab; temperature waiting under air cooling can lead to a large temperature range between surface and center, which can increase center strain of thick slab during subsequent rolling.
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Ma, Jin Hong, Xiao Han Yao, Bin Tao, and Shuo Li. "Controlled Residual Stress Research of H-Beam." Advanced Materials Research 898 (February 2014): 237–40. http://dx.doi.org/10.4028/www.scientific.net/amr.898.237.

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Because of the residual stress of H-beam after hot rolling, the service performance of H-beam is seriously impacted. it is necessary to reduce the residual stress by controlled rolling and cooling process. In this paper, a continuous rolling model of finish product of H200 x 200 x 8 x 12 is set up. The continuous rolling process of H-beam was simulated using the large finite element software ANSYS/LS-DYNA. The effect of non-uniform elongation of web with flange and section temperature difference on the residual stress are analyzed. Through metallographic observations, the vary microstructure of rolling piece with residual stress and with no residual stress is analyzed. As can be seen from the finite element analysis and the experimental results, reasonable elongation of flange and web and controlling cooling speed to decrease the sectional temperature difference can reduce the residual stress of H-beam.
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Xiong, Tao, Yi Xiao, Shi Sen Wang, Han Xiong Dong, and De Fa Li. "Effects of Controlled Rolling and Controlled Cooling on the Mechanical Properties of 550MPa Grade Engineering Mechanism Steel." Advanced Materials Research 602-604 (December 2012): 337–41. http://dx.doi.org/10.4028/www.scientific.net/amr.602-604.337.

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The effects of controlled rolling and controlled cooling parameters on the microstructure and mechanical properties of 550MPa grade engineering mechanism steel were investigated in the industrial trial conditions. The results show that the mechanical properties of 550MPa grade engineering mechanism steel are obviously improved by controlling finishing rolling temperature ranged from 780°Cto 850°C, and by using accelerate cooling after rolling, ferrite grains are refined markedly of the steel which possess excellent strength and toughness behaviors.
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Li, Gui Yan, Bao Chun Zhao, Zao Fu Pang, Yong Hao Liu, and Hui Xia Ma. "Research on Simulating of Controlled Rolling and Controlled Cooling Process for Mo Micro-Alloy Steel." Materials Science Forum 575-578 (April 2008): 595–99. http://dx.doi.org/10.4028/www.scientific.net/msf.575-578.595.

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The transformation production and recrystallization for Mo Micro-alloy Steel had been carried out on the Gleeble-3800 thermo-mechanical simulator. Based on the schedule, TMCP was applied to two stages multi-pass hot rolling experiments and the influences of the technological parameters on microstructure and mechanical property were analyzed. The results showed that the microstructure, precipitation and mechanical property of Mo Micro-alloy steel were strongly affected by the start-rolling temperature, the end-rolling temperature, the cooling rate and the relaxation time. The appropriate parameters were used and the ideal volume fraction of the acicular ferrite was observed by using metallographic microscope and transmission electron microscope(TEM).
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Pussegoda, L. N., P. D. Hodgson, and J. J. Jonas. "Design of dynamic recrystallisation controlled rolling schedules for seamless tube rolling." Materials Science and Technology 8, no. 1 (January 1992): 63–71. http://dx.doi.org/10.1179/026708392790169821.

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Huo, Wen Feng, Xian Lei Hu, Bing Xing Wang, and Xiang Hua Liu. "Numerical Simulation of Intermediate Cooling Temperature Field in Controlled Rolling." Advanced Materials Research 148-149 (October 2010): 359–62. http://dx.doi.org/10.4028/www.scientific.net/amr.148-149.359.

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Air cooling may decrease rolling efficiency in controlled rolling for needing long holding time to obtain the correct rolling temperature because of small cooling rate. The intermediate cooling can increate the cooling rate, and improve rolling efficiency. Experiment was carried out to research the effect of intermediate cooling on rolling efficiency. The influence of different cooling mode on the temperature distribution and the temperature profile characteristics of different cooling strategy are analyzed with FEM. It shows that intermediate cooling can decrease the holding time effectively, and improve rolling efficiency; the temperature homogeneity in thickness direction can be improved by opening the header one after another and cooling the plate by oscillating cooling.
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Wang, Bing, Dong Dong Liu, Zhong Qi Dong, Yang Song, and Yan Jun Meng. "Controlled Rolling and Cooling Process of Spring Steel 65Mn." Applied Mechanics and Materials 713-715 (January 2015): 2624–26. http://dx.doi.org/10.4028/www.scientific.net/amm.713-715.2624.

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Haliyo, D. Sinan, Fabien Dionnet, and Stéphane Regnier. "Controlled rolling of microobjects for autonomous manipulation." Journal of Micromechatronics 3, no. 2 (June 1, 2006): 75–101. http://dx.doi.org/10.1163/156856306777544943.

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Dissertations / Theses on the topic "Controlled rolling"

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Wang, Kai. "A study of HSLA steels microalloyed with vanadium and titanium during simulated controlled rollling [i.e. rolling] cycles." Thesis, University of Canterbury. Mechanical Engineering, 2003. http://hdl.handle.net/10092/7521.

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Thermomechanical treatments involving recrystallisation controlled rolling process of hot rolling strip mills were simulated in a Gleeble-1500 testing machine. Five vanadium and one vanadium-titanium microalloyed HSLA steels were used for these simulations. Specimens of vanadium steels were heated to 1170°C to simulate slab reheating, prior to a 50% upset reduction at 1060°C, The specimens were then cooled rapidly to the simulated coiling temperatures of 950°C to 600°C and held for half an hour then air cooled to room temperature. Nitrogen analysis established that the maximum volume fraction of VN coincided with the minimum ferrite grain size at a simulated coiling temperature of 700°C. The resultant ferrite grain size indicated that the VN precipitated in the ferrite restricted the ferrite grain growth. The maximum VN precipitation that was observed at this temperature was considered to be a function of the vanadium diffusion in the ferrite and the temperature at which the austenite to ferrite transformation is completed. Quenched specimens following deformation at 1060°C showed that strain induced VN precipitation was detected when the equilibrium solubility product calculations predicted the formation of VN. The measured VN precipitation based upon nitrogen analysis, was less than that predicted. Comparison of detected VN at coiling temperatures of 600°C to 950°C for specimens subjected to 50% deformation at 1060°C with specimens without deformation showed that the deformation increased the VN precipitation. Using the experimentally determined ferrite grain size, volume fraction and mean particle size of the precipitated VN, the corresponding yield strength has been calculated for the range of coiling temperatures examined. These calculated yield strengths lie within the range determined experimentally on similar vanadium micro alloyed HSLA steels. The reheating behaviour of the vanadium-titanium steel was investigated by quenching specimens from 900°C to 1500°C after holding for half an hour at the respective temperatures. Insoluble nitrogen analysis indicated that VN completely dissolved below 1100°C and TiN started to dissolve in austenite at approximately 1300°C. The measured insoluble nitrogen content indicated the existence of TixV₁-xN. The measurement of size distribution of precipitates showed that the dissolution of precipitates of less than 10 nm resulted in abnormal austenite grain growth. It was thought that the results for AIN detected using the Beeghly method [Beeghly49, United Steel 62] were influenced by dissolution of the finer sized VN and TiN precipitates. This was because the detected AIN was in excess of that calculated from the equilibrium solubility for the remaining nitrogen content based upon the measured acid insoluble nitrogen content being combined as TiN. The nitrogen content detected as being associated with AIN was greater than that detected as the acid soluble nitrogen content that is defined as the total amount of nitrogen in the form of aluminium nitride, iron nitrides and interstitial nitrogen. X-ray diffraction of residues separated from specimens reheated at 900°C and 1350°C using 17% v/v dilute sulphuric acid showed that VN and TiN precipitates were present in the specimen reheated at 900°C, while there was only TiN detected at 1350°C, Precipitates extracted from reheated specimens using carbon replicas were identified using a convergent beam electron diffraction method. The indexing of dual spot diffraction patterns established that VN had precipitated on the surfaces of existing TiN precipitates with the same crystal orientation as the initial TiN. These dual spot diffraction patterns were not observed in specimens reheated above 11OO°C. The thermomechanical treatment of a vanadium-titanium steel in hot rolling strip mills was simulated using the Gleeble-1500 testing machine. The rolling was simulated by carrying out four passes each of 20% deformation on specimens at finish rolling temperatures of 1050°C to 850°C. An additional experiment involved a final deformation that varied from 10% to 30% for a finish rolling temperature of 1000°C. For all these finish rolling simulations, the specimens were rapidly cooled to a range of temperatures between 750°C and 600°C. The rapid cooling occurred at a rate of 10°C/s and having reached the simulated coiling temperature the specimens were subsequently slow cooled to represent the thermal behaviour in the coil. Insoluble nitrogen analysis showed that the quantity of nitrides decreased with the decreasing coiling temperature. While the finish rolling temperature and deformation percentage had no measurable effect on the final insoluble nitrogen content after coiling, the size of precipitates decreased with the decreasing coiling temperature and with increasing percentages of deformation. The final ferrite grain size decreased with the decreasing finish rolling temperature and with increasing percentages of deformation. The average ferrite grain size of specimens subjected to 30% final deformation at 1000°C, coiled at 750°C, 700°C, 650°C and 600°C was less than 10 µm. Finish rolling at 1000°C, 950°C and 900°C in the austenite recrystallisation region with four passes each of 20% deformation also achieved a fine ferrite grain size of under 10 µm provided that the coiling was performed at temperatures of 650°C or less. Interphase precipitation with the planar or non-planar morphologies was not observed in the thin foils or carbon replicas from the specimens subjected to the simulated thermomechanical treatments for the steels containing either vanadium, or the combination of vanadium and titanium. The observed precipitates in the ferrite phase in these steels were distributed on dislocations, within the ferrite and on the ferrite grain boundaries. The calculations based on the Hall-Petch equation showed that the lower yield strength for the specimens subjected to 20% and 30% deformation respectively at a finish rolling temperature of 1000°C and coiled at 750°C, 700°C, 650°C and 600°C increased as the coiling temperature decreased from 750°C to 600°C. The lower yield strength for specimens subjected to 30% final deformation was higher than that for 20% and the maximum lower yield strength occurred at the coiling temperature of 600°C for both 20% and 30% final deformations. The present experimental results showed that with appropriate coiling temperatures and a accelerated cooling rate the recrystallisation controlled rolling process for vanadium and vanadium-titanium steels can be used to produce a hot strip steel with a fine ferrite grain size of less than 10 µm. This means that the 70% to 80% deformation at around 800°C in the low temperature controlled rolling process was not necessary to obtain a fine ferrite grain size. Thus a fine grained strip steel can be produced in the existing hot strip rolling mills without exceeding the load limitation of a strip rolling equipment.
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Patel, Jitendra Kumar. "The controlled hot-rolling of HSLA steels to optimise properties." Thesis, Swansea University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.547855.

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High strength steels have provided a unique opportunity for the automotive industry to achieve weight reduction via reduced material thickness whilst maintaining performance requirements such as crash worthiness. However, the initial success of HSLA steels was constrained by inconsistencies in the final mechanical properties. Although significant improvements in both mechanical and dimensional properties have since been made, increasingly stringent customer specifications for high strength steels mean that the challenge to reduce variability in automotive HSLA steel products and enure their continued competitiveness has never been greater. This investigation addresses the issues concerning the controlled hot rolling of Nb-HSLA strip steels through a series of laboratory and commercial trials, both to optimise the mechanical properties and uniformity of properties. Both sets of data established that: (i) the strength was decreased by reducing the soak temperature from 1250°C to 1150°C; (ii) the presence of furnace skid chills during soaking locally reduced the strength; (iii) lowering of the finishing temperature towards the Ars reduced the overall strength, but improved the coil-width property consistency, and; (iv) the existence of an optimum coiling temperature developed higher strengths and improved property consistency. The programme of work conducted also observed that by finishing near the Ars temperature, very fine ferrite subsurface grains are created which limit the fall in strength. Additionally, the commercial trials highlighted the need to compensate for the exposure-related cooling effects of the inner and outer most laps of the hot-rolled coil, thereby reducing any potential for developing further inconsistencies. Furthermore, the work undertaken has established that prudent additions of niobium, coupled with the use of a low finishing temperature and an optimum coiling temperature, will lead not only to higher strengths steels but also to significant improvements to the through-coil uniformity of properties
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Bozgeyikli, Evren C. "Introducing Rolling Axis Into Motion Controlled Gameplay As A New Degree Of Freedom Using Microsoft Kinect." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614606/index.pdf.

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Motion controlling is a rapidly improving area of game technologies. In the last few years, motion sensing devices for video games such as Nintendo Wii, Microsoft Kinect for Xbox 360 and Sony PlayStation Move have gained popularity among players with many compatible motion controlled games. Microsoft Kinect for Xbox 360 provides a controller free interaction system in which the player controls games by using only body movements. Although Kinect provides a natural way of interaction, rolling action of body joints are not recognized within the standard motion sensing scope of the tool. Aim of this thesis is to provide an improved gameplay system with an increased degree of freedom by introducing rolling axis of movement using Microsoft Kinect for Xbox 360 for motion sensing. This improved gameplay system provides the players a more natural and accurate way of motion controlled interaction, eliminating unnatural gestures that are needed to be memorized to compensate for lacking of the roll movement recognition.
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Vishal, Vaibhaw 1978. "Plastic buckling in gas transmission line-pipes, cold formed from thermo-mechanically-controlled rolling of low-allow steel plates." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/40359.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2007.
Includes bibliographical references (leaves 157-164).
The need for energy infrastructure has led to transportation of gases over long distances. The strength-grade of pipeline steels used for transportation of gases has been increasing to reduce the cost of the overall pipeline system. Along with higher strength, adequate fracture toughness and resistance to plastic buckling are required of pipes installed in earthquake- or frost-prone regions. To get higher strength with adequate deformability in low-alloy pipeline steels, plates for pipes are typically made today by thermo-mechanically-controlled rolling processes, which introduce strong crystallographic texture and anisotropy in the pipes. The plates are then cold-formed into pipes, which introduces further anisotropy and residual stresses in the pipe. In the current work, effects of various steps of the pipe manufacturing process, such as rolling, cold forming, etc., on residual stress, hardening moduli, plastic anisotropy, and eventually, to the buckling resistance of the pipe, are studied. Effects of various types of geometric perturbation on plastic buckling response of pipes are also studied.
(cont.) Due to the crystallographic texture and cold-forming, crystal plasticity-based constitutive models instead of Mises plasticity-based constitutive models may be better suited to model the pipe. In the current work, crystal plasticity-based material models are used to predict the buckling response of pipes. Results show that the buckling strain in uniaxial compression, predicted using a crystal plasticity-based model, is - 20% less than the one predicted using an "equivalent" Mises plasticity-based model, for a pipe with d/t ratio of 51. Further results show that variation in material properties and residual stresses caused by cold forming reduces the buckling strain by - 30%, for a pipe with d/t ratio of 51.
by Vaibhaw Vishal.
Ph.D.
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Liu, Jingrong. "Design and Analysis of Intelligent Fuzzy Tension Controllers for Rolling Mills." Thesis, University of Waterloo, 2002. http://hdl.handle.net/10012/848.

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This thesis presents a fuzzy logic controller aimed at maintaining constant tension between two adjacent stands in tandem rolling mills. The fuzzy tension controller monitors tension variation by resorting to electric current comparison of different operation modes and sets the reference for speed controller of the upstream stand. Based on modeling the rolling stand as a single input single output linear discrete system, which works in the normal mode and is subject to internal and external noise, the element settings and parameter selections in the design of the fuzzy controller are discussed. To improve the performance of the fuzzy controller, a dynamic fuzzy controller is proposed. By switching the fuzzy controller elements in relation to the step response, both transient and stationary performances are enhanced. To endow the fuzzy controller with intelligence of generalization, flexibility and adaptivity, self-learning techniques are introduced to obtain fuzzy controller parameters. With the inclusion of supervision and concern for conventional control criteria, the parameters of the fuzzy inference system are tuned by a backward propagation algorithm or their optimal values are located by means of a genetic algorithm. In simulations, the neuro-fuzzy tension controller exhibits the real-time applicability, while the genetic fuzzy tension controller reveals an outstanding global optimization ability.
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Ingelstrand, Kristina, and Rebecka Klasson. "Business controllern : Digitaliseringens influenser på rollen." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-23991.

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This study aims to investigate and assess how the role of a business controller and his or her tasks are influenced by digitalization. This study will provide theoreticians and practitioners with a deeper insight of the requirements, skills, experiences, tasks and expectations that fall on the controller in a digital world. The controller's main tasks involve analysis, communication, reporting, data management and forecasting. There are potential tools for the tasks to be implemented effectively. We are during a digital revolution. This brings along changes and it requires the will of adaptation and development. To succeed in running a business, it requires planning, strategy, and qualified personnel. This requires knowledge, but also the right conditions in the workplace to do the job. With the analytical and technical tools available today, controllers can become an invaluable resource if they can master the tools and learn to interpret and understand the information that IT-systems can provide. Companies are also required to implement the right system. This study is based on the theory of digitization, the business controller role and role theory. Empirical data were collected through 50 job advertisements and five interviews. Through inquiry of empirics and theories and an analysis of this material, an understanding could be created about how the controller's role and tasks are influenced by digitalization. Specifically, the extent to which the controller uses digital tools and the demand that companies have for controllers' digital skills and experience. It also provides an insight into the role and expectations of the controller in a digital world. The conclusion of this study is that controllers use digital tools to a large extent. Which in turn places demands on digital experiences and skills. The digital revolution can be considered a fact, which entails the controller to consider and monitor digital development and change. The job advertisements show a clear tendency that digital experience and skills are a large part of what is demanded from companies. Despite the high demand for digital skills, the review of job advertisements shows that companies still only require a person with a financial education. The role of a business controller in Sweden has gone from being a financial controller and an accountant to a role that is now in a borderland between IT and finance. Which means that the role can now be considered as something of a hybrid. However, the empirical evidence in this study shows that this is not yet fully seen in practice. This study is written in Swedish.
Denna studie syftar till att undersöka och bedöma hur business controllerns roll och arbetsuppgifter influeras av digitaliseringen. Studien ska ge teoretiker och praktiker en större insikt kring vilka krav, kompetenser, erfarenheter, arbetsuppgifter och förväntningar som faller på controllern i en digital värld. Controllerns huvudsakliga arbetsuppgift är i grunden analys, kommunikation, rapportering, hantering av data samt prognostisering. Det finns potentiella hjälpmedel för att detta ska genomföras effektivt. Vi är mitt uppe i en digital revolution. Detta för med sig förändringar och det kräver viljan av anpassning och utveckling. För att lyckas driva en verksamhet krävs planering, strategi och kvalificerad personal. Det kräver att kunskap finns men också rätt förutsättningar på arbetsplatsen för att uträtta arbetet. I och med de analytiska och tekniska verktyg som idag finns tillgängliga, kan controllers bli en ovärderlig resurs om dessa kan bemästra verktygen och lära sig att tolka och förstå den information som IT-system kan tillgodose. Studien grundar sig på teori kring digitalisering, controllerns roll samt rollteori. Empiri har samlats in genom 50 platsannonser samt fem intervjuer. Genom granskning av empiri och teori samt en analys kring detta material kunde förståelse skapas kring hur controllerns roll och arbetsuppgifter influeras av digitalisering. Specifikt i vilken utsträckning controllern använder sig av digitala verktyg och vilken efterfrågan företag har på controllers digitala kompetenser och erfarenheter. Det ges även en insikt i vilken roll samt vilka förväntningar som faller på controllern i en digital värld. Slutsatsen av denna studie är att controllers använder sig av digitala verktyg i bred utsträckning. Vilket i sin tur ställer krav på digitala erfarenheter och kompetenser. Den digital revolutionen kan anses vara ett faktum vilket för med sig ett krav på att controllern ska beakta och följa med i den digitala utvecklingen och förändringen. I platsannonserna påvisas tydlig tendens att digital erfarenhet och kompetens är en stor del av det som efterfrågas från företag. Trotts den höga efterfrågan på digital kompetens visar granskningen av platsannonser att företag fortfarande enbart efterfrågar en person med ekonomisk utbildning. Rollen som controller har gått från att vara en “styrekonom” och revisor till att rollen nu befinner sig i ett gränsland mellan IT och ekonomi. Vilket för med sig att rollen nu kan anses vara något av en hybrid. Dock visar empirin i denna studie att detta ännu inte ses helt i praktiken.
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Johannesson, Lisa, and Emma Persson. "Controllerrollen : en ökad förståelse för rollen inom stora svenska företag." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-14398.

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Controllerrollen utvecklades inom organisationer i början av 1900-talet och har förändratsmycket över tidens gång. Controllern har gått från att ha en mer kameral roll till att ha fått en allt mer affärsinriktad och analyserande funktion inom företagen. Denna drastiska förändring av funktionen skedde på 1930-talet genom att Controllers Institute of America (CIA)startades, vilket ledde till att controllern fick den mer analyserande rollen. Inom företag iSverige och övriga Europa växte controller begreppet fram under 1970-talet. Men rollen som controller har fortfarande inte någon tydlig definition och kan se väldigt olika ut beroende på vilket företag controllern arbetar inom. Det finns även väldigt många olika typer av controllers, vilket ökar variationen av rollen. Uppsatsen syftar till att öka kunskapen om vaddet innebär att arbeta som controller; det vill säga vilka arbetsuppgifter och vilken kompetens som är vanligt förekommande inom yrket, vilka skillnader det finns mellan företag samt omdet finns en skillnad mellan hur controllern själv och övriga inom organisationerna definierar controllerrollen. Studien är genomförd med en kvalitativ metod och en abduktiv ansats. Materialet är insamlat via semistrukturerade intervjuer av både controllers och dessmedarbetare. Det genomfördes tio stycken intervjuer på fem olika företag, varav sju intervjuer var med controllers och tre intervjuer var med medarbetare. Resultatet blev att de intervjuade controllerna i studien gick att kategorisera som tre olika typer av controllers baserat på deras arbetsuppgifter och ansvarsområden; analytiker med inslag av kamrer, kamrer med inslag av analytiker samt en blandning av analytiker, pedagog och coach. Vi kan konstatera att vi märkt en viss skillnad i controllerrollen mellan företagen gällande företagsstorlek och hur rapporteringen är utformad, men inga större skillnader beroende på bransch. Avslutningsviskom vi fram till att de intervjuade controllerna och medarbetarna i stor utsträckning var överens kring vad controllerrollen innebär både i allmänhet och på de specifika företagen.
The role of a controller has existed within organizations since the beginning of the 20thcentury, but it has developed substantially over time. The controller initially had an accountant role and now they have an increasingly business oriented and analytical function within business organizations. In the 1930s, this drastic change of function in the role occurred by the Controllers Institute of America (CIA), which resulted in the controller getting a more analytical role. Within companies in Sweden and across Europe, the controller concept developed in the 1970s. However, the role of a controller still lacks a clear definition and the content in the role varies substantially across different business organizations. There are also many different types of controllers, which increases the role variation. The objective of this study is to increase the knowledge of the role of a controller; by studying which tasks and expertises that are included in the profession, the differences between companies and whether there is a difference between how the controller himself/herself and the others within the organizations define the role of a controller. The study is conducted with a qualitative study with an abductive approach. The empirics are collected via semi structured interviews with both controllers and related roles. The study was conducted by means of ten interviews across five different companies, of which seven interviews with controllers and three interviews with related roles. The controllers were categorized as three different types of controllers based on their duties and responsibilities; the analysts with elements of accountants, the accountant with elements of analysts and the mix of analyst, educator and coach. A noticeable difference in the role was noted between companies depending on their size and how their reporting is designed, but no major differences depending on industry. Finally, we concluded that the interviewed controllers and the related individuals largely agreed on controller role content in general as well as within each respective company.
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Wadström, Samuel, and Erik Engstrand. "Ekonomistyrning utan budget : Controllern och budgetering i kontrast till Beyond budgeting." Thesis, Linköpings universitet, Företagsekonomi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-166716.

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Bakgrund: Konventionell budgetering har fått utstå betydande kritik under de senaste decennierna, där många menar att den inte är lämplig i dagenssnabbrörliga och globala marknad. Ett flertal organisationer har övergett konventionell budgetering, och rörelsen eller filosofin berördetta kallas för Beyond Budgeting (BB). Grundprinciperna i denna filosofi är en organisationsstruktur där mer ansvar och tillit placeras hos den operativa delen av organisationer. Detta är menat att ge mer frihet till enskilda medarbetare men väcker frågor om agentteori och organisatorisk kontroll. Controllers traditionella roll har setts som ett verktyg för ledningen att utöva kontroll och motverka agentteorins moraliskarisk. Frågan är hur denna roll påverkas av en allt mindre strikt form av kontroll, vilka faktorer som kan tänkas påverka denna roll och hur rollen redan har förändrats. Syfte: Studiens syfte är att undersöka hur controllerrollen och budgetarbete ser ut i dagens organisationer samt om kritiken mot budgetarbete, så som filosofin BB beskriver den, faktiskt stämmer i dagens organisationer. Ytterligare undersöker studien till vilken grad BB som metod har implementerats i dessa organisationer. Metod: Semi-strukturerade intervjuer med sex stycken respondenter inom flertalet olika organisationer har agerat som empirisk data. Denna data harsedantranskriberats och analyserats i enlighet med den deduktiva ansatsen, där de teorier vi funnit har applicerats. Analysen skedde genom en tematisk analys där teman och kategorier funnits för att påvisa samband inför slutsatsen. Slutsats: Studien tyder på att controllers idag har en hög grad av kontroll över deras arbete samt att arbetet huvudsakligen är analytiskt och framåtblickande. Delar av respondenterna anser sig ha en beslutsfattande roll och arbetar huvudsakligen enskilt men har ett brett kontaktnät. Rollen kan till viss del beskrivas som en affärspartner men vi fann stora skillnader mellan respondenterna. Bland respondenterna var det vanligast att använda en toppstyrd budget, där enskilda affärsenheter har mindre inflytande. Denna budget kompletterades sedan med prognoser. Vi fann att delar av kritiken mot konventionell budgetering stämde in bland respondenternas organisationer, samt att aspekter av BB har implementerats.
Background: Conventional budgeting has endured a lot of criticism in the last decades as many argue it is not suitable for today's agile and globalized market. Several organizations have taken the step to abandon conventional budgeting and the movement, or philosophy, regarding this matter is known as Beyond Budgeting (BB). The core principle of this philosophy are an organizational structure where a higher degree of responsibility and trust is placed on the operative sections of the organization. By doing this a much higher degree of liberty is granted to partners in the organization, but it raises questions regarding agent theory and organizational control. The traditional role of the controller has been to function as a tool for upper management to exercise control and counteract the moral hazard of agency theory. The question then is how this role is affected by a much less strict form of control, and which factors can be seen to affect the role as well as which factors that have already affected it.   Purpose: The purpose of the study is to examine the role of the controller and how budgeting of modern organizations are handled as well as how the accurate the critique aimed at budgeting is, as it is described by the philosophy of BB. Furthermore, the study aims to examine to which degree the subject organizations has implemented or embraced the principles of BB.  Method: The study is built on semi-structured interviews with a total of six participants, based in several organizations, which have acted as the empirical data. This data has been transcribed and analyzed in accordance with the studies’ deductive approach upon which our studied theories have been applied. The analysis has been based on a thematic analysis where the goal has been to find common themes and categories.    Conclusion: The study has found that controllers today have a high degree of control regarding how they choose to perform their work, which has been found to be primarily analytical and forward-looking in nature. Some of the controllers consider themselves to have a decision-making role, and while their work is primarily done alone, they have a wide array of contacts. The role can to a degree be described as a business partner, but the study has found large differences among participants in this regard. Among the participants it was most common to use a conventional budget, set by upper management where local business units have limited influence. This budget was complemented with forecasts. The study also found that among the participant’s organizations, some of the critique towards conventional budgeting was accurate to a certain degree. In addition, we found that aspects of BB had been implemented.
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9

Wallin, Victor, and Niklas Wentzel. "Vem är controllern? : En kvalitativ studie om controllern i rollen som styrorienterad och traditionell ekonomichef." Thesis, Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-15501.

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Sammanfattning     Det finns många definitioner av vad yrket controller innebär, vilket visar att yrkestiteln är svårdefinierad. Syftet med studien är att beskriva controllerns arbetsroll i medelstora tillverkande privata företag och om controllerns roll fokuserar mer mot styrorienterade uppgifter eller mer mot traditionella ekonomiuppgifter. Vi utformade därför följande frågeställning: Är dagens controller i tillverkande företag mer styrorienterad eller mer en traditionell ekonomichef? Vi valde att genomföra en kvalitativ studie eftersom det möjliggör en djupare förståelse och sedan använde vi oss av en deduktiv ansats där vi gick från teori till empiri. I vår teoretiska referensram har vi beskrivit olika egenskaper, färdigheter, roller och arbetssätt som ingår i controllerns yrke. Vår empiriska studie omfattade personliga intervjuer med fem controllers som kompletterades med en enkät där respondenterna fick rangordna sina arbetsuppgifter i förhållande till tiden. Resultatet visar att vi inte kan påvisa att controllern arbetar mer med styrorienterade uppgifter eller mer med ekonomiuppgifter, men däremot anser vi att controllern arbetar med både styrorienterade- och ekonomiuppgifter.   Nyckelord: Controller, Roll, Ekonomichef, Styrorienterad roll
Abstract     There are many definitions of what the profession controller imply, which indicates that the profession is difficult to define. The purpose of this study is to describe the controller's job role in medium-sized manufacturing companies within the private sector and if the controller’s role focuses more on controlling-oriented tasks or more on traditional business tasks. Therefore we enunciated the following framing of question: Is today’s controller in manufacturing companies more controlling-oriented or more a traditional chief financial officer? We chose to conduct a qualitative study because it enables a deeper understanding and then we chose a deductive approach where we went from theory to empiricism. In our theoretical framework we described various characteristics, skills, roles and ways of working as part of the controller's profession. Our empirical study involved personal interviews with five controllers, which were supplemented by a survey where the respondents ranked their tasks in relation to time. The result shows that we can’t demonstrate that the controller works with more controlling-oriented tasks or more with traditional business tasks, but we believe that the controller works with both controlling-oriented- and traditional business tasks.   Keywords: Controller, Role, Chief financial officer, Controlling-oriented
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Ferreira, Henrique Cezar. "Geração de referências para as malhas de controle de um laminador de tiras a frio." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/3/3139/tde-10122004-004129/.

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Sistemas de geração de referências para as malhas de controle de laminadores a frio têm proporcionado elevados níveis de produtividade e de qualidade do material processado. No caso de falha da unidade de processamento responsável pela execução do sistema de geração de referências, a operação do laminador fica comprometida e necessita-se de um modo de operação emergencial. Nesse trabalho é desenvolvido um sistema alternativo para geração de referências que visa substituir o modo de operação de emergência de consulta a tabelas de referências pré-calculadas da planta em questão. O sistema de geração de referências desenvolvido, assim como o sistema usado em condições normais de operação, é composto por uma função custo que avalia o nível de produtividade e de qualidade que um conjunto de referências pode proporcionar. A função custo é minimizada pelo método simplex de Nelder e Mead e as variáveis do processo envolvidas na função custo são avaliadas por um modelo de laminação a frio composto somente por equações algébricas, enquanto que o sistema usado em condições normais de operação usa um modelo clássico, composto por equações algébricas e integrais. A comparação entre o sistema usado em condições normais de operação e o sistema desenvolvido mostrou que apesar desse sistema ser mais simples, menos preciso e robusto, as referências por ele calculadas são aceitáveis e podem proporcionar resultados superiores que o modo de operação de emergência baseado na consulta a tabelas.
Setup generation systems for cold mill control loops have provided rolling mill operation with high levels of quality and productivity. In case of malfunctioning in the process unit responsible to execute the setup generation system, the normal procedure for the operation of the mill is interrupted, being necessary the use of an emergency operation mode. This work develops an alternative system for references generation which aims to replace the current emergency operation mode based on pre-calculated, not continuous, setup tables for the rolling mill. The developed references generation system, like the normal system used during mill operation, is composed by a cost function which evaluated the mill quality and productivity operation level which a set of references may propose. The cost function is minimized using the Nelder and Mead simplex method and the process variables involved in the cost function are evaluated by a cold rolling mill model composed only by algebraic equations, while the normal operation system uses a classical model, made up by integrals and algebraic equations. Comparing the existing main setup system to the developed reference system it was observed that, despite its simplicity, less accuracy and less robustness, references calculated using this system were accurate enough to achieve better results than the one emergency table mode has provided.
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Books on the topic "Controlled rolling"

1

Khan, Akhlaque Ahmed. Modelling of the recrystallization-stop temperature in a Nb steel during controlled rolling and hot direct rolling. Manchester: University of Manchester, 1993.

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Alligator blood: The spectacular rise and fall of the high-rolling whiz-kid who controlled online poker's billions. London: Simon & Schuster, 2013.

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W, Smith John. Biomechanically induced and controller coupled oscillations experienced on the F-16XL aircraft during rolling maneuvers. [Washington, D.C.]: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Program, 1996.

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W, Smith John. Biomechanically induced and controller coupled oscillations experienced on the F-16XL aircraft during rolling maneuvers. [Washington, D.C.]: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Program, 1996.

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Sandler, Corey. Official Sega Genesis and Game Gear strategies, 3RD Edition. New York: Bantam Books, 1992.

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Tom, Badgett, ed. Official Sega Genesis and Game Gear strategies, 2ND Edition. Toronto: Bantam Books, 1991.

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Canada. Energy, Mines and Resources Canada. and Manitoba. Dept. of Energy and Mines., eds. Computer controlled energy management system, Rolling River School Division #39. [Ottawa]: Energy, Mines and Resources Canada, 1985.

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CONTROLLED HEAT STRAIGHTENING FOR THE ROLLING STOCK STRUCTURES TO RESTORE THEIR SERVICEABILITY. Hlučín: Anisiia Tomanek OSVČ, 2018. http://dx.doi.org/10.47451/book2021-09-01.

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United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch., ed. Wind-tunnel investigation at supersonic speeds of a remote-controlled canard missile with a free-rolling-tail brake torque system. [Washington, DC]: National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1985.

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Wind-tunnel investigation at supersonic speeds of a remote-controlled canard missile with a free-rolling-tail brake torque system. [Washington, DC]: National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1985.

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Book chapters on the topic "Controlled rolling"

1

Lenard, J. G. "State-of-The-Art of Controlled Rolling." In Modelling Hot Deformation of Steels, 1–18. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-52515-5_1.

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Qiao, Shifan, Ping Xu, Xiao Sun, and Ziyong Cai. "Experimental Study on High Rockfill Embankment Filling Quality Controlled by Rolling-Dynamic Compaction Technology." In Lecture Notes in Civil Engineering, 723–38. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2349-6_46.

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Ruan, Shipeng, Aimin Zhao, Lijun Wang, Guangjie Han, and Peng Zhang. "Effect of Controlled Rolling and Cooling on Microstructure and Properties of Cold Heading Steel Containing Boron and Titanium." In Lecture Notes in Mechanical Engineering, 361–66. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0107-0_34.

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Wasiwitono, Unggul, Latifah Nurahmi, Ari Kurniawan Saputra, and Bambang Pramujati. "Robust H∞ Controller with Parametric Uncertainties for Anti-Rolling Gyro System." In Lecture Notes in Mechanical Engineering, 385–93. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-0867-5_46.

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Steinle, Claus, Heike Bruch, and Thomas Michels. "Controller-Rollen: Anforderungsprofile, Persönlichkeit und Selbstverständnis — Ein empirisches Schlaglicht." In Zukunftsgerichtetes Controlling, 443–68. Wiesbaden: Gabler Verlag, 1998. http://dx.doi.org/10.1007/978-3-322-89031-3_25.

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Steinle, Claus, Heike Bruch, and Thomas Michels. "Controller-Rollen: Anforderungsprofile, Persönlichkeit und Selbstverständnis - Ein empirisches Schlaglicht." In Zukunftsgerichtetes Controlling, 381–406. Wiesbaden: Gabler Verlag, 1996. http://dx.doi.org/10.1007/978-3-322-87516-7_22.

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Ruicheng, Zhang, and Li Guide. "Design of Active Disturbance Rejection Controller for the Rolling Mill Automatic Position Control Stopping System." In Advances in Intelligent and Soft Computing, 395–403. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-25185-6_51.

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Ruicheng, Zhang, and Chen Zhikun. "Design of Active Disturbance Rejection Controller for Main Drive System of Rolling Mill with Uncertainty Parameters." In Advances in Intelligent and Soft Computing, 385–94. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-25185-6_50.

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Glushchenko, Anton I., and Vladislav A. Petrov. "On Comparative Evaluation of Effectiveness of Neural Network and Fuzzy Logic Based Adjusters of Speed Controller for Rolling Mill Drive." In Advances in Neural Computation, Machine Learning, and Cognitive Research II, 144–50. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-01328-8_15.

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"Application to Thermomechanical Controlled Processing." In Rod and Bar Rolling, 371–405. CRC Press, 2004. http://dx.doi.org/10.1201/9781482276695-9.

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Conference papers on the topic "Controlled rolling"

1

Dax, F. R., T. Foust, H. Jones, and N. Fredericksen. "Controlled Temperature Shape Rolling of Alloy 718." In Superalloys. TMS, 1991. http://dx.doi.org/10.7449/1991/superalloys_1991_133_145.

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Ribeiro e Silva, Sergio, Guillermo Vásquez, C. Guedes Soares, and Adolfo Marón. "The Stabilizing Effects of U-Tanks as Passive and Controlled Anti-Rolling Devices." In ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/omae2012-83501.

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In this study a U-type tank, consisting of two lateral reservoirs connected by means of an horizontal channel, is considered either as a passive or controlled anti-rolling device for ships. Initially, forced oscillation tests have been conducted at CEHIPAR for the U-type tank on a moving platform for different frequencies and also for different amplitudes of the pure roll forced motions adopting two distinct configuration: passive and controlled by means of two air valves installed on top of two lateral reservoirs. The most important aspect was to obtain a large set of roll restoring moments, for both passive and controlled configurations, which could give a discrete distribution of the roll restoring moments along the entire range of wave frequencies of interest. On a first study, a detailed account of model tests was presented, the method of analyzing the experimental results was discussed, and the experimental data of the U-type tank was compared with results from Lloyd’s linear frequency domain model, where non-linear effects with the amplitude of the forced motions was thoroughly addressed. In this paper, the stabilizing effects of the same U-tank installed onboard a typical containership has been first analyzed with two distinct tools: WaMIT wave interaction 3D analysis software, and the two degrees-of-freedom numerical model referred above. In second place, the experimental data of the controlled U-type tank has been compared and contrasted with results from a nonlinear time domain model, where the controller of the air valves has been also included. Therefore, some preliminary conclusions could finally be drawn about the stabilizing effects of U-type tanks as passive and controlled anti-rolling devices.
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Beck, H. P., and D. Turschner. "Parameter estimation for state controlled rolling-mill motors using evolutionary algorithms." In 6th International Workshop on Advanced Motion Control. Proceedings. IEEE, 2000. http://dx.doi.org/10.1109/amc.2000.862903.

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Zhang, Songtao, Lihua Liang, Xiaoliang Sheng, and Na Wang. "Parameters optimization of controlled anti-rolling tank based on multi-objective optimal method." In 2012 IEEE International Conference on Automation and Logistics (ICAL). IEEE, 2012. http://dx.doi.org/10.1109/ical.2012.6308197.

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Grames, Clayton L., Jordan D. Tanner, Brian D. Jensen, Spencer P. Magleby, John Ryan Steger, and Larry L. Howell. "A Meso-Scale Rolling-Contact Gripping Mechanism for Robotic Surgery." In ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-46516.

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A new, compact 2 degree-of-freedom mechanism 4.1 mm in diameter suitable for robotically controlled surgical operations is presented. Current commercially available robotically controlled instruments achieve high dexterity defined by three degrees of freedom and relatively confined swept volume at just under 1 cm in diameter. Current smaller diameter instruments result in high part count and large swept volumes (less dexterity). A meso-scale rolling contact gripping mechanism is proposed as an alternative. The manufacturing of the parts is made feasible by Metal Laser Sintering, which can produce parts that are difficult to replicate with traditional manufacturing methods. The resulting instrument has only 6 parts and a small swept volume. Instrument actuation and control by a surgical robotic system is demonstrated.
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Soler, Nicolas, Rolf Isermann, and Frank Feldmann. "A Practical Approach for the Design of Thickness and Tension Controllers in Multi-Stand Cold Rolling Mills." In ASME 2008 Dynamic Systems and Control Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/dscc2008-2129.

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Thickness and tension control in multi-stand cold rolling mills is a multivariable problem which in literature is typically solved with MIMO control approaches. Nevertheless due to the realization and commissioning effort SISO PI-control is often preferred for practical applications. In this article the coupling between strip thickness and interstand tension is analyzed in detail. Based on this analysis an assignment of controlled and manipulated variables is proposed for the design of SISO PI-control loops. A method for the controller design based on the Internal Model Control approach is presented and it will furthermore be shown how the SISO loops can be extended stepwise to a more complex MIMO controller. This results in a scalable control concept where performance and controller complexity are directly linked.
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Mishchenko, V., S. Shejko, and G. Sukhomlin. "Formation of Polygonized Structures and Nuclear Recrystallization under Controlled Rolling of Low-Carbon Steels." In MS&T19. TMS, 2019. http://dx.doi.org/10.7449/2019mst/2019/mst_2019_1427_1431.

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Mishchenko, V., S. Shejko, and G. Sukhomlin. "Formation of Polygonized Structures and Nuclear Recrystallization under Controlled Rolling of Low-Carbon Steels." In MS&T19. TMS, 2019. http://dx.doi.org/10.7449/2019/mst_2019_1427_1431.

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Dei, Michele, Jordi Sacristan, Eloi Marigo, Mohanraj Soundara, Lluis Teres, and Francisco Serra-Graells. "A 10-bit linearity current-controlled ring oscillator with rolling regulation for smart sensing." In 2017 IEEE International Symposium on Circuits and Systems (ISCAS). IEEE, 2017. http://dx.doi.org/10.1109/iscas.2017.8050228.

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Khaki, Daavood Mirahmadi, Amir Abedi, Francisco Chinesta, Yvan Chastel, and Mohamed El Mansori. "Effect of Controlled Hot Rolling Parameters on Microstructure of a Nb-Microalloyed Steel Sheet." In INTERNATIONAL CONFERENCE ON ADVANCES IN MATERIALS AND PROCESSING TECHNOLOGIES (AMPT2010). AIP, 2011. http://dx.doi.org/10.1063/1.3552530.

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