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Dissertations / Theses on the topic 'Lifting mechanism'
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1
Weissman, Gaddy Y. (Gaddy Yitzhak) 1980. "A lifting mechanism for the J-750." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/87876.
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Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.Includes bibliographical references (leaf 76).
by Gaddy Y. Weissman.
M.Eng.
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Andersson, Rasmus, and Fredrik Engström. "Compact lifting mechanism of autonomous vehicle : Concept development and guidelines for implementation." Thesis, Linköpings universitet, Maskinkonstruktion, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-153585.
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The material handling industry is facing new challenges with the divergence from the established EUR-pallet. In correlation with the autonomous technology which is becoming more advanced, available and affordable than ever before, new demands are created. The industry calls for innovative material handling automated guided vehicles to meet the requirements. These vehicles will increase the owners profit by being more efficient in terms of time, size and cost. The aim for this study is to develop suitable lifting mechanisms for an ultra-compact automated guided vehicle. A generic product development process is utilized. The requirements for the lifting mechanism is defined and presented in a specification. A selection of employees are involved in the ideation and concept generation to add in-house knowledge and experience. The concepts are developed with component research, 3D visualizations and concept descriptions. The concepts are evaluated and the most promising are selected. The selected concepts are further developed with CAD-models, calculations and a selection of components. The concepts are compared with each other and the initial specification to assess the most suitable lifting mechanism. The single acting hydraulic system, including a Micro Power Pack and four small hydraulic cylinders, is considered the best suitable choice for an ultracompact material handling automated guided vehicle.
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CALVIN, LINARES PABLO. "CONCEPT FOR A PORTABLE ASSISTIVE LIFTING SEAT." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Industridesign, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-43678.
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This project consists of the design of a concept for a portable assistive seat in collaboration with IKEA. The aim of the project is to create a solution that fits within the Omtänksam family of products and shares the company’s values of what is so-called Democratic Design: Form - Quality - Low Price - Function – Sustainability The Omtänksam Family is focused on products that can help the elderly to have a more comfortable life while blending with the home environment. A portable assistive Lifting Seat is a real need for many people that require some extra help when standing up or sitting down. The main goal of this project is to design a cheap, safe, simple and light product that can assist people for reducing the effort that is required from them. The product must be comfortable, easy to transport and friendly to interact with. Considering a mass manufacturing perspective is very important to meet the previously formulated requirements. The force that the assistive seat releases must keep performing efficiently during the product service life. A locking system must be provided for avoiding the lifting force to act when the user is sitting, assisting only when it is demanded. This Thesis describes the process of designing a concept for a Portable AssistiveLifting Seat involving different areas such as ergonomics, semantics, manufacturing, mechanical engineering and materials science. The design approach in this case is driven by the Democratic Design Principles combining the human-centered design with a market perspective. The result takes advantage of form and material for avoiding the need for any extra lifting mechanism. This solution is way simpler than any other one existing in the market and it integrates the solution for many different problems in one single piece. This simplification of the problem allows reducing the production cost and helps to meet the intended requirements creating an innovative product for the market.
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Hurník, Štěpán. "Otočný sloupový jeřáb plnícího vozu koksárenské baterie." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229962.
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This master´s thesis deals with a proposed design of the derrick of the filling car of a coke-oven battery, which is used for working with unit loads, repairing and maintenance of the filling car and cleaning of the battery risers. In the first part a solution concept was chosen. For this concept a main steel structure was designed, which was controlled in stress analysis by the FEM program I-DEAS NX 11. Further, the main parts of the lifting and travelling mechanism were calculated using specified parameters. In the conclusion of this thesis the results summary of specified targets is stated. Assembly drawing is in the annex of this thesis.
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Begáň, Matej. "Kočka šrotového jeřábu - otočná část." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-442799.
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The diploma thesis deals with a design of a rotating part of a crane trolley of a scrap crane with a load capacity of 110,000 kg, which is situated in an exterior environment. The aim of the diploma thesis is a design and calculation verified design of the lifting mechanism, rotation mechanism and the design of a spacious traverse, which is used for the manipulation of the scrap trough and casting ladle.
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FAKHOURI, Muhannad Yacoub. "Application of Sliding Isolation Bearings with Upward Lifting Mechanism for Seismic Performance Enhancement of Multi-Story Structures." 京都大学 (Kyoto University), 2012. http://hdl.handle.net/2433/157552.
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Folprecht, Michal. "Pojezdové a zvedací zařízení." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230579.
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The main goal this thesis is presenting solution for manipulation with chopper BELL between of hangar and landing zone. The main task is design useful construction solution by required task, also perform a strenght calculations each part of mechanism and drawing documentation. Also included is a 3D visualization of the entire mechanism.
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Brzobohatý, Petr. "Mostový jeřáb - návrh jeřábové kočky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-228909.
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The diploma work deals with design of lifting mechanism of overhead crane trolley with a load capacity 200 t. The main objective is design and analysis of selected components of lifting mechanism and components which are directly associated with lifting mechanism. Work includes design elements of a rope system, such as rope, rope drum, sheaves, sheave block, elements of the proposals of propulsion, such as engine, transmission, brake, coupling. The work contains also strength calculations of some components and drawing documentation.
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Oliva, Petr. "Jeřábová kočka hradidlového portálového jeřábu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-442808.
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This master´s thesis deals with the design of a crane trolley with the main and ancillary lift according to the specified parameters. The aim of the work is the elaboration of technical calculations and drawing documentation. The technical report deals with the design of lifting mechanisms, travelling mechanism and design and strength control of the crane frame. The drawing documentation includes a stroke assembly drawing, a travel assembly drawing, a frame steel structure assembly drawing, and a general crane cat assembly drawing.
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Macháček, Jakub. "Návrh manipulačního zařízení výrobní linky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401490.
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This master's thesis is focused on the design of handling and lifting equipment of production line. This thesis deals with the design of the frame for transverse feed of 100 mm and longitudinal feed of 1500 mm. The thesis deals with the design of several lifting equipment for load capacity 1450 kg and stroke 120 mm. The main part of this thesis is focused on appropriate calculations for selected variants of lifting equipment. The conclusion contains comparison lifting constructions and description equipment in the production line. The thesis contains assembly drawings of several lifting equipment variants and assembly drawings of equipment.
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Riesner, Tomáš. "Manipulátor ovocnářských produktů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-227978.
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The work deals with construction project of manipulator for loading of fruit products to a means of haulage (lorry semi-trailers, railway wagons). One part of the writnig is an idea concept of whole machinery and a detailed project of a lifting part with its strentght calculation. That was firstly worked out manually as a design and then subsequently optimalised by the Finite Element Method. Design documentation was made up based on the construction project and the calculated values.
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Adam, Petr. "Pomocná jeřábová kočka licího jeřábu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241179.
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This master thesis deals with issue design of crab trolley. Concretely is acted about auxiliary crab trolley with required capacity 65 000 kg. This crab is on overhead crane, which is situated at hall of foundry. In particular chapters is processed design of lifting mechanism and travelling mechanism, which is amended to strength control of frame. This whole leads to output solutions, which is drawing documentation.
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Bureš, Martin. "Jeřáb pro manipulaci s leteckými agregáty." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-231033.
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This master´s thesis solves design of a mobile crane for handling air aggregates and ejection seats. Handling crane provides lifting a maximum weight of 300 kg to a height of 4600 mm. Subject of the work is the choice of appropriate technical solutions, design of lifting mechanisms, supporting structures and accessories. The suitability of the solution is checked by strength analysis of individual units. Another task is to provide mobility equipment and control stability against overturning. The appendix includes protocols static analysis of the program Nexis32, drawing overall crane assembly and manufacturing drawings selected parts.
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Kukla, Antonín. "Pojezdové a zvedací zařízení." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229337.
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The main objective of the thesis is to design and construct a taxiway and a lifting device for moving a BELL helicopter with slides. Handling equipment is used for transporting helicopters between the airfield and hangars. The thesis is divided into several parts. The first part includes the design of taxiway and lifting equipment. Other parts contain strength calculation of selected parts and design documentation, which includes assembly drawings and important groups drawings.
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Rosendorf, Pavel. "Pojezdové a zvedací zařízení." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230133.
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Master thesis describes the design of travelling and lifting mechanism for the Bell helicopter with a minimum weight of 2,000 kg and travel of 80mm. In some parts of this work will find an overview of the manufactured equipment, analysis of possible mechanisms, the concept with strength calculations with FEM supported calculations of each frame.
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Kuděla, Jan. "Návrh horního nosníku dvousloupového regálového zakladače." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231178.
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This master thesis deals with a concept of two columned shelf stacker’s upper beam. The first part contains a research of storage systems used in logistics and a description of the shelf stack’s basic parts. The second part is dedicated to the draft of the pulley arrangement with a rope calculation, pulleys and shafts, in the same the draft of the pulley attachment to the rope leading to the counterweights. It is followed by the concept of the couple winch drive ensues synchronized with the electronic cardan. The final part depicts the dynamic analysis of the lifting truck’s movement in the dependence on the load size and distribution respecting the dynamic effect of the counterweight act.
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Kolouch, David. "Administrativní a výrobní budova firmy GRADIOR TECH v Brně, stavebně technologický projekt." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409934.
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The aim of this diploma thesis is the processing of selected parts of the construction technology project for the New office and manufacturing building of GRADIOR TECH a.s. The building is located in the Královopolská industrial park in Brno - Královo pole. The construction is divided into 6 buildings. The indicative time and financial plan focuses on the building as a whole. Furthermore, the diploma thesis focuses in detail on the construction technology project project in detail on the building of the office building, which is based on drilled piles. On these piles, the cup feet for pillar fitting are placed on which the beams are fitted together with frames and ceiling panels. The building is diverse and contains both prefabricated and monolithic structures.
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Roubíček, Marek. "Stavebně technologický projekt výzkumného centra CEITEC - Brno." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226990.
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The subject of the Diploma's thesis is " Construction and technological solutions of CEITEC Science Park in Brno". The content is a solution of the whole project from a commercial, construction-technological and time costingness side. The purpose was a preparation of all works before starting an execution.
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Mézl, Petr. "Stavebně technologický projekt přístavby výrobní haly." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392054.
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This diploma thesis deals with the construction and technological project of the extension of the production hall Granitol a.s. in Moravian Beroun. The thesis focuses on the technological stage of assembly of the prefabricated skeleton of the rough top structure and the laying of the floor formation. In addition, an extended accompanying and summary technical report, a technical report on transport relations and coordination of oversized transport, a time and financial plan for the construction, a budget for the prefabricated skeleton, a timetable and the balance of the workers, the design of the main construction machines and mechanisms, including their time commitment , organization of the construction of the building including drawings of the construction site equipment, technological regulation for the assembly of the prefabricated skeleton and the laying of the floor formation, inspection and testing plan for the prefabricated skeleton assembly, summary assessment of the lifting mechanism selection, schematic of the assembly procedure of the prefabricated skeleton elements, protection and health at work during construction.
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Canales, Daniel. "A Kinematic Comparison Between Greater-and Lesser-Skilled Powerlifters Doing the Traditional Style Deadlift." Thesis, North Texas State University, 1987. https://digital.library.unt.edu/ark:/67531/metadc500915/.
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Comparison kinematic models of the traditional style deadlift are presented. Data was obtained through film and analyzed via computer and computer graphics. The comparison between the models revealed that the greater-skilled: 1. used less trunk flexion from the instant of initial trunk lean to the instant of maximum trunk lean, 2. used less knee extension (in same time interval as 1), and 3. demonstrated a smaller horizontal distance between the body center of mass (CM) and the CM of the bar at the instant the bar left the platform. A trend was also observed in which the greater-skilled subjects demonstrated less thoracic lean than the lesser-skilled group at the time the bar reached knee level.
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Mavor, Matthew. "The Effects of Protective Footwear on Spine Control and Lifting Mechanics." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/37205.
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Low back pain (LBP) is a common condition that affects all age groups and sexes. Although the development of LBP is multifactorial, the performance of lifting-based manual material handling (MMH) tasks are recognized as a primary risk factor. Many occupations that involve MMH tasks are performed in hazardous environments, where personal protective equipment (PPE) must be worn. Among the most commonly prescribed forms of PPE in Canada are CSA Grade 1 steel-toed work boots. According to the hazards present on the jobsite, workers may need to wear steel-toed work boots with/without a metatarsal guard or be able to wear steel-toed shoes (no upper). However, the amount of research on the interaction between protective footwear and human motion is limited. Therefore, the purpose of this thesis was to assess the effects of steel-toed shoes (unlaced), steel-toed boots (work boot), and steel-toed boots with a metatarsal guard (MET) on lifting mechanics. Specifically, three-dimensional kinematics of the lower limbs and trunk, sagittal net reaction moments of the low back, and local dynamic stability (LDS) of the lower limbs, lower back, and upper back were analyzed. Twelve males and 12 females were recruited to participate in this research project. Participants performed a repetitive lifting task at 10% of their maximum back strength, under three block-randomized footwear conditions. Ankle dorsiflexion was negatively affected by footwear type, where dorsiflexion was reduced the most in the MET condition compared to the unlaced condition (p < 0.01). However, there were no other main effects of footwear type on any other variable tested, and both male and female participants were able to maintain similar lifting mechanics and LDS values when moving up the kinematic chain. It is possible that participants were able to preserve their kinematics and stability through the appropriate recruitment of muscles, which may have implications for an increase in compressive and shear force on the spine and should be explored further in the future.
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Král, David. "Mateřská škola a polyfunkční objekt Želivec - příprava a realizace stavby." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-225476.
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The masters thesis with the name Nursery school and multifunctional building Želivec solves preparation and realization of building. The aim of masters thesis is to design of time, financial and material resources. The thesis contains budget, time schedule, building-site, technological standard, control and trial plan, assessment of lifting mechanism and study of realization of the main stages. The thesis is prepared on the basis of technical documents submitted by the designer. Part of the thesis is specialization.
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Glogar, Matěj. "Manipulátor se vzorky plechů pro mechanické zkoušky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229007.
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This thesis deals with a solution of lifting equipment for sheet metal samples handling. Facility will be part of an automatic production line for semi-finished test specimens for testing the mechanical properties of sheet metals. The options of solutions discussed in this thesis is performed that choice which should be the concept of lifting equipment. Course work cycle of the selected concept is designed, so that material flow provided by the facility meets requirements of the production line. Calculations for the design parts of the main cylinder and the running gear are carried out using a set of parameters and then strength check of steel construction follows. The 3D model of the manipulator, the manipulator assembly drawings and layout drawings of the production line are annexes of this work.
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Bommarito, Pete. "A three dimensional kinematic comparison of the conventional versus sumo style deadlifts." Virtual Press, 2000. http://liblink.bsu.edu/uhtbin/catkey/1164833.
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The primary purpose of this study is to use three-dimensional motion analysis to determine and compare certain kinematic joint and segmental variables at defined events (bar off and knee passing) between the conventional and sumo styles of deadlifts. The secondary purpose of this study is to investigate bar path profiles and vertical bar velocity patterns (including attempting to determine a "sticking region") and compare these variables between the two styles and two sub-maximal loads (50% and 75%). Five subjects performed each style at each load. Each trial was filmed, digitized, and imported for 3-D reconstruction. This data was utilized to determine hip, knee, inter-thigh, trunk, thigh, and shank angles at bar off and knee passing; bar path profiles; and bar velocity values (including determining the "sticking region"). A two way ANOVA showed statistically significant differences between the two styles for most joint and segmental variables at both events and the range between the two events. There was a significant difference between the two styles for total time and horizontal and vertical bar displacement. Only one trial showed a sticking region. Based on the results of this study, it can be stated that kinematic differences do occur between the two styles of deadlifts at submaximal loads. A sticking region does not appear to occur at loads of 75% of a 1 rep maximum or less.School of Physical Education
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Newman, Patrick S. Garner Brian Alan. "The influence of load on kinematics of computer-simulated sagittal-plane lifting." Waco, Tex. : Baylor University, 2005. http://hdl.handle.net/2104/2888.
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Píštěk, Kamil. "Vybrané části stavebně technologického projektu bioplynové stanice v Herálci." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226509.
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The master thesis with the name Selected Parts of Building -Technological Project of Biogas Station in Heralec solves preparation and realization of building. The aim of master thesis is to design of time, financial and material resources. The thesis contains budget, time schedule, building-site, technological standard, control and trial plan, assessment of lifting mechanism and study of realization of the main stages. The thesis is prepared on the basis of technical documents submitted by the designer. Part of the thesis is specialization.
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Sklenářová, Ludmila. "Stavebně technologický projekt Bioplynové stanice Pikárec." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226981.
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The thesis titled Biogas Plant Pikárec deals with the building technology preparation and implementation of the construction. Construction of a biogas plant consists of six main buildings which will be implemented in the area of agricultural cooperatives during its operation. All buildings will be designed as reinforced concrete. The aim of the thesis is the design time, financial and material resources to ensure the smooth progress of construction.
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Samson, Akiev. "Digital human modeling for ergonomic assessment of patient lifting by paramedics." Diss., Online access via UMI:, 2009.
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Thesis (M.S.)--State University of New York at Binghamton, Thomas J. Watson School of Engineering and Applied Science, Department of Systems Science and Industrial Engineering, 2009.Includes bibliographical references.
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Daňhel, Oldřich. "Jeřáb mostový 50t - 27m." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228800.
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This master's thesis deals with the crab of a traveller crane of 50,000 kg load capacity. The aim of the thesis is a functional calculation of travelling and lifting crab mechanisms and strength frame calculation in compliance with applicable ČSN standards and respective literature concerned with the calculations of cranes and their parts. The attached drawings show the crab, lifting and travelling mechanisms.
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Pivcová, Tereza. "Výstavba objektu mateřské školy, Brno - Ivanovice, stavebně technologická příprava stavby." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226978.
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Subject of this master thesis is the structural and technological support for the construction of nursery school in Brno Ivanovice. The aim of master thesis is to design time, financial and material resources. The thesis contains technical report, time schedule, building-site, technological standard, control and quality inspection plan and study of realization of the main stages. Part of the thesis is trade’s specialization.
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Procházka, Jan. "STK pro nákladní vozidla Olomouc - Holice - příprava a organizace výstavby objektu." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-225406.
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The master’s thesis goal is construction-technological project of the "Technical inspection station for trucks" in the city of Olomouc. The goal is rationaly propose preparation and organization of the main building construction. The thesis includes design of site equipment, budget, schedule, main construction machines, construction stages, cash-flow assessment and technological prescription for bored piles.
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Brabec, Josef. "Polyfunkční dům Eastgate, Brno - stavebně technologický projekt." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-239963.
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The aim of this diploma thesis is the building-technological solutions of gross structure Multifunctional file EASTGATE Brno. This multi-functional file is divided into objects Z and Y. This thesis solves the construction of gross substructure and gross superstructure object Z and gross substructure object Y. It deals with the most optimal propsal of technological procedures, working machines, itemized budget, time schedule, check and test plans, equipment of construction site, assessment of lifting mechanism and last but not least closer transport relations. The thesis is prepared on the basis of technical documents submitted by the designer.
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Petruška, Tomáš. "Sportovní areál - stavebně technologická příprava." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-225516.
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The diploma thesis solves the construction technology project of sports complex. The aim of the thesis is rational proposal of construction and resources. The thesis contains plant building site, technological instruction, budget, time schedule, control and trial plan, design and assessment of lifting mechanism and machinery used over construction, contract for work and safety report. Part of the thesis is specialization in sports surfaces.
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Jílek, Jan. "Objekt B3 bytového komplexu Sadová - stavebně technologický projekt." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409930.
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The subject of thesis is construction technological project of B3 object, aiming at apartment building, which is the main building object. The apartment building consists of four above-ground floors and is established on foundation strips. The principal of thesis elaboration is the budget of the main object and the construction schedule. The diploma thesis also deals with the draft of construction site equipment for particular steps of construction, the construction organization, the lifting mechanism design, the technological regulation for selected operation, the transport accessibility and the protection of health and safety at work taking into account environmental protection.
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Hichri, Bassem. "Design and control of collaborative, cross and carry mobile robots : C3Bots." Thesis, Clermont-Ferrand 2, 2015. http://www.theses.fr/2015CLF22601/document.
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L'objectif du travail proposé est de concevoir et commander un groupe des robots mobiles similaires et d'architecture simple appelés m-bots (mono-robots). Plusieurs m-bots ont la capacité de saisir ensemble un objet afin d'assurer sa co-manipulation et son transport quelle que soit sa forme et sa masse. Le robot résultant est appelé p-bot (poly-robot) et est capable d'effectuer des tâches de déménageur pour le transport d'objets génériques. La reconfigurabilité du p-bot par l'ajustement du nombre des m-bots utilisés permet de manipuler des objets lourds et des objets de formes quelconques (particulièrement s'ils sont plus larges qu'un seul m-bot). Sont considérés dans ce travail l'évitement d'obstacle ainsi que la stabilité du p-bot incluant la charge à transporter. Une cinématique pour un mécanisme de manipulation a été proposée et étudiée. Ce dernier assure le levage de la charge et son dépôt sur le corps des robots pour la transporter. Plusieurs variantes d'actionnement ont été étudiées : passif, avec compliance et actionné. Un algorithme de positionnement optimal des m-bots autour de l'objet à manipuler a été proposé afin d'assurer la réussite de la tâche à effectuer par les robots. Cet algorithme respecte le critère de "Force Closure Grasping" qui assure la stabilité de la charge durant la phase de manipulation. Il maintient aussi une marge de stabilité statique qui assure la stabilité de l'objet durant la phase de transport. Enfin, l'algorithme respecte le critère des zones inaccessibles qui ne peuvent pas être atteintes par les m-bots. Une loi de commande a été utilisée afin d'atteindre les positions désirées pour les m-bots et d'assurer la navigation en formation, durant la phase du transport, durant laquelle chaque robot élémentaire doit maintenir une position désirée par rapport à l'objet transporté. Des résultats de simulation pour un objet de forme quelconque, décrite par une courbe paramétrique, sont présentés. Des simulations 3D en dynamique multi-corps ainsi que des expériences menées sur les prototypes réalisés ont permis de valider nos propositionsOur goal in the proposed work is to design and control a group of similar mobile robots with a simple architecture, called m-bot. Several m-bots can grip a payload, in order to co-manipulate and transport it, whatever its shape and mass. The resulting robot is called a p-bot andis capable to solve the so-called "removal-man task" to transport a payload. Reconfiguring the p-bot by adjusting the number of m-bots allows to manipulate heavy objects and to manage objects with anyshape, particularly if they are larger than a single m-bot. Obstacle avoidance is addressed and mechanical stability of the p-bot and its payload is permanently guaranteed. A proposed kinematic architecture for a manipulation mechanism is studied. This mechanism allows to lift a payload and put it on them-bot body in order to be transported. The mobile platform has a free steering motion allowing the system maneuver in any direction. An optimal positioning of the m-bots around the payload ensures a successful task achievement without loss of stability for the overall system. The positioning algorithm respects the Force Closure Grasping (FCG) criterion which ensures the payload stability during the manipulation phase. It respects also the Static Stability Margin (SSM) criterion which guarantees the payload stability during the transport. Finally, it considers also the Restricted Areas (RA) that could not be reached by the robots to grab the payload. A predefined control law is then used to ensure the Target Reaching (TR) phase of each m-bot to its desired position around the payload and to track a Virtual Structure (VS), during the transportation phase, in which each elementary robot has to keep the desired position relative to the payload. Simulation results for an object of any shape, described by aparametric curve, are presented. Additional 3D simulation results with a multi-body dynamic software and experiments by manufactured prototypes validate our proposal
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Mouka, Jiří. "Víceúčelový objekt v Lužici - stavebně technologický projekt." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-371979.
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The diploma thesis deals with the solution of the multi-purpose building project in Lužice. This work includes the extended accompanying and summary technical report, the coordination situation of the construction, the technical report of the transport relations and the coordination of the oversized transport, the object time schedule and the financial plan of the construction, the plan for providing the material resources containing the staff balance for the construction of the main building, the time schedule for the assembly of the prefabricated skeleton, technological standard for prefabricated skeleton, design of main building machines and mechanisms including their time commitment, organization of construction of multipurpose building including drawings of construction site equipment, technological regulation for assembling of prefabricated skeleton and for making of reinforced concrete floor, inspection and testing plan for prefabricated skeleton assembly, lifting mechanism, assembly schemes for prefabricated skeleton elements, lifting mechanism verification schemes, item budget prefabricated skeleton chalk and instructions for building use and maintenance.
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Ševela, Ondřej. "Příprava a realizace výrobní haly v Holešově." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392129.
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The diploma work has been dealing with the building and technological design of a production hall in Holešov. The work includes the general and specification report, the study of main technological phases, the site plan, the technological specification solving the transportation relations and coordination of oversize transportation, time and financial schedule of the construction, material supply plan including staff review, the time schedule for pre-cast frame assembly, machinery plan including the time employment, the site plan including the drawings, technological specification of pre-cast frame assembly and of steel-fibre-reinforced floor, inspection and test plan of pre-cast concrete frame assembly, assessment of lifting mechanism, the procedure scheme of pre-cast concrete frame assembly and the cost estimate of pre-cast concrete frame.
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Kaše, Vladimír. "Zdvihací a manipulační zařízení pro podvěsné příslušenství letadla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230373.
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The thesis is dealing with the design proposal of mobile handling equipment for the aircrafts´ overhead accessory. In its initial part it describes different types of manipulators in use, following by several possibilities how to solve the problematics. The main part of the thesis is focused on concrete solution and construction of such manipulating facility, including the strength and control calculations.
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Hořínková, Dita. "Stavebně technologický projekt výstavby komplexu RD SLAVKOV - Pod Zlatou horou." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409928.
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The subject of the diploma thesis is the solution of chosen parts of the construction technology project of the 1st phase of the construction „Komplex RD Slavkov, Pod Zlatou horou“. These are 4 semi-detached houses, overall 8 family houses. The work deals with technological regulations for the superstructure including roof, study of the realization of the construction technology project, design of the main construction machines and mechanisms and control and test plan. For the whole construction is elaborated time and financial plan in two variants, namely the gradual and current method of construction, and a detailed schedule for one semi-detached house. The technical report of the building site equipment is completed with the drawings, itemized budget of the building part of the house, noise study and specialization focused on the photovoltaic system, with an alternative solution to use solar collectors. The thesis also includes a case study of construction methods focused on the gradual and current method of construction.
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Elsner, Ondřej. "Jeřábová kočka 32t." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229751.
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This thesis deals with design four-wheel crab of crane for overhead crane with capacity of 32,000 kg. Contains the functional calculations of steel rope , pulleys, cable drum. The integral part of the thesis constitutes the calculation and choice of driving mechanism for lifting, travel drive and motor drive pulley block hook rotation.
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Štěrba, Marek. "Sadová, Bytový dům M1 - stavebně technologický projekt." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372154.
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The aim of the diploma thesis is construction-technological project of the whole construction focusing on the main building object - Apartment building, which is based on large-diameter drilling piles. The basis of the work is the budget of the main building and its timetable. Part of the thesis is a solution of organization of construction and design of building site equipment, technological regulation of selected activities, quality control and solution of transport relations including oversized transport. In addition, the design of the machine assembly, assessment of lifting mechanisms, safety and health protection and protection of the environment are solved.
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Bassey-Duke, Elizabeth Misan. "An ergonomics intervention study into the physiological, perceptual and productivity effects of three citrus harvesting bag designs in the Eastern Cape of South Africa : a combined laboratory and field approach." Thesis, Rhodes University, 2015. http://hdl.handle.net/10962/d1018908.
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Background: Agriculture plays a vital role in the economy of any industrially developing country, including South Africa. In the Eastern Cape of South Africa citrus farming is a significant contributor to the local economy (Johnson et al., 2005). The harvesting phase of citrus farming is performed manually and exposes workers to physical risks, which can lead to the development of musculoskeletal disorders. In particular, the standard harvesting bag comprises of a single shoulder strap and promotes asymmetrical load carriage which results in shoulder and lower back pain complaints. The current study compared the physiological (EMG), perceptual (RPE), usability (PUEU) and productivity effects of two new harvesting bag designs (a hip belt and a backpack bag design) to the standard harvesting bag design. This was performed in a laboratory as well as a field setting. Methods (Laboratory phase): 36 participants (12 males and 24 females) were assigned to one worker group. The “tall ladder worker” group was comprised of only males and the “step ladder worker” and “ground worker” group of females. Each participant was required to simulate a citrus harvesting task while utilizing each of the bag designs on different days. On each day/test session, participants performed three harvesting cycles. Muscle activity was measured throughout the entire testing session and RPE were recorded at the end of each cycle. Results (Laboratory phase): The EMG and RPE results indicate that the backpack design was the most ideal design to reduce asymmetry, while the standard harvesting bag design was the worst. Although not significant, there was greater muscle asymmetry (p=0.109) and a significantly higher perceived exertion when using the standard bag (p=0.0004), in comparison to using the backpack. Methods (Field phase): 17 Xhosa-speaking citrus harvesters (6 females and 11 males) participated in this study. Each harvester worked with one of the three bag designs on a different day. Productivity of each worker was assessed every hour by recording the number of bags filled with fruit and at the end of the shift. A Perceived Usefulness & Ease of Use questionnaire was presented to each participant to obtain feedback on worker acceptance to the new bag designs. Results (Field phase): A general trend in support of the hip belt bag design over the other two bag designs were found, even within the different worker demographic groups (age, sex and worker experience). The workers perceived less exertion (7.98 ± 1.86) and were more productive (9.90 ± 2.11 bags/hour) when using the hip belt design; they also found this bag the most useful (1.02 ± 0.09) and easy to use (1.07 ± 0.25). In contrast, the backpack bag design had significantly poorer responses when compared to the other two bag designs and this was evident in all the dependent variables assessed (RPE, productivity and PUEU). Conclusion: The results from the laboratory phase supported the expectation that the backpack bag design reduces asymmetry and hence, is more suitable than the standard harvesting bag. However, results from the field show that the hip belt bag design was the most preferred and the backpack was the least preferred. Bao & Shahnavaz (1989) highlight the need for ergonomics researcher to convey laboratory findings into the field context. However, as shown by the current study, there are numerous challenges associated with field work, making it difficult for laboratory findings to be successfully conveyed to the field. Limitations and Recommendations: For the laboratory phase of the project, no biomechanical and cardiovascular responses were assessed. However, for a holistic approach, these variables should be considered in future studies. Due to high variability from one harvesting cycle to another, more than three harvesting cycles should also be performed to accurately replicate the harvesting process as done in the field over extended durations of time. For the field phase, data should be collected from more than one citrus farm and thus a larger sample size could be obtained. This would improve the validity of the study. In addition to this, data should be collected for a full working day, especially if environmental conditions are not a hindrance, as well as for a whole season, since workloads vary, depending on the time of the harvesting season.Name on Graduation Programme: Bassey-Duke, Elizabeth Missan
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Kondáš, Ondřej. "Polyfunkční dům Brno, Černovice - stavebně technologický projekt." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265233.
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The aim of this master's thesis is the construction-technological project of the entire building focusing on major construction building - Multifunctional house, which is based on large-diameter piles. The main part of thesis are budget of object and time schedules of construction. Part of the thesis is organization of construction and design of the site eguipment, technological regulation of selected work, quality control and solving transport relations including oversize cargo. It also deals with the design of mechanical assemblies, health and safety, safety of environment and design of instructions for use of building.
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Чибиров, А. Б., and A. B. Chibirov. "Разработка новых конструкций реверсивных шестеренных насосов для систем смазки возвратно-вращательных механизмов экскаваторов : магистерская диссертация." Master's thesis, б. и, 2019. http://hdl.handle.net/10995/74958.
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Диссертация на тему «Разработка новых конструкций реверсивных шестеренных насосов для систем смазки возвратно-вращательных механизмов экскаваторов» содержит 95 страниц текста, рисунков – 49, формул – 22, использованных источников – 18, иллюстрационный альбом, включающий 15 листов формата А1 графической части. Ключевые слова: системы смазки, реверсивные механизмы, реверсивный насос, шестеренный насос, консистентная смазка, циркуляционная смазка, карьерные экскаваторы, привод поворота, привод подъемной лебедки. Предмет исследования: проблемы систем смазки современных карьерных экскаваторов. Цель работы: разработка схемы и конструкции насоса, обеспечивающего бесперебойную подачу смазывающего вещества при постоянном реверсировании его ведущего вала. Итогом работы является разработка двух концептуальных вариантов шестеренного реверсивного насоса для узлов, совершающих возвратно-вращательные движений. Насосы могут работать от основного привода, без использования дополнительного двигателя. Так же в работе представлен пример использования данных насосов в узлах карьерного экскаватора ЭКГ-20, таких как редуктор подъемной лебедки и редуктор привода поворота с расчетом параметров насоса для последнего. В процессе работы над диссертацией была оформлена заявка на патент на полезную модель «Реверсивный шестеренный насос». Заявка зарегистрирована в Роспатенте с приоритетом от 23.04.2019. Регистрационный номер заявки 2019112339.The dissertation on the theme "Development of new designs of reversible gear pumps for lubrication systems of return-rotational mechanisms of excavators" contains 95 pages of text, figures – 49, formulas – 22, used sources – 18, an illustrative album, including 15 sheets of A1 format of the graphic part. Key words: lubrication system, reversing mechanisms, a reversible pump, gear pump, grease lubrication, circulating lubrication, mining shovels, swing drive, the drive of the lifting winch. Subject of research: problems of lubrication systems of modern mining excavators. The purpose of the work: development of the scheme and design of the pump, ensuring uninterrupted supply of lubricant with constant reversal of its drive shaft. The result of the work is the development of two conceptual variants of the gear reversible pump for units performing reciprocating movements. Pumps can operate from the main drive, without the use of an additional engine. Also the paper presents an example of the use of these pumps at the nodes of a mining shovel EKG-20, such as reducer lift winch, and the gear drive rotation calculation of pump parameters for the latter. In the process of working on the thesis was issued a patent application for a utility model "Reversible gear pump". Application to patent with priority of 23.04.2019. Registration number of the application 2019112339. The practical usefulness of the work lies in the fact that this pump is ready for use in many areas of engineering, as shown by the example of mining equipment.
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Škopík, Michal. "Stavebně technologická studie realizace haly Blansko." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227629.
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This diploma thesis deals with solution of construction of steel hall in Blansko. In this thesis is solved constructional-technological study of construction of steel hall. The thesis focuses in assembly of steel skeleton. More specifically deals with traffic situation around building, time and financial plan of the building for individual objects, draft of equipment of construction site, design of the main lifting machines and mechanisms, schedule of the main building object, safety measures at the construction site and ensuring quality requirements for the installation of a steel skeleton. Extra is processed itemized budget with bill of quantities, risk plan of construction of steel hall and construction details. This building is very interesting about architectural design. The basis for this thesis was a drawing documentation for realization of this construction.
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Li, Jia-Hau, and 李家豪. "Design of Wheelchair Lifting Mechanism for Vehicles." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/jv5n7y.
Full textAbstract:
碩士國立臺北科技大學
車輛工程系所
99
In order to let cripples or elderly get on and off rehabus or rental car easily, both of the rehabus and rental car are equipped with wheelchair lifts. In this study, a new wheelchair lifts mechanism that includes lifting and folding parts is developed. First, the design of lift mechanism combined with a parallel link-bar mechanism and a hydraulic cylinder based on six-bar mechanism synthesis theory is executed. The parallel link-bar mechanism is used to ensure the translation motion of wheelchair platform. The hydraulic cylinder is power source of the lift mechanism. Then, the eight-bar mechanism synthesis theory is used to incorporate the lift mechanism with the fold mechanism so that the wheelchair platform can be folded automatically during the operation. Computer-aided engineering (CAE) is used to analyze movements, interference and stress of the proposed wheelchair lifts by ADMS/View and SolidWorks,, respectively. Compared with the other wheelchair lifts, the proposed ones might reduce quantity of mechanistic components, specifications of the hydraulic cylinder and force on joints of the mechanistic components.
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He, Hui-wen, and 何惠雯. "Mechanism Analysis of Water-lifting Machines in Ancient China." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/52057709470169625686.
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碩士國立臺灣科技大學
機械工程系
100
Water-lifting machine is an application of machinery used for conveying water from the lower positions to higher ones. In ancient China, since engineering technology was not as mature as in modern era, it is common that the mechanism drawings of water-lifting machines in ancient Chinese books were mistakenly represented. The purpose of this work is, therefore, to study and analyze the mechanism drawings of the water-lifting machines in ancient Chinese books and technology history books, trying to reason the rationality and redraw the kinematic diagrams of the machines if they were depicted questionably. First, based on the mechanism types, we classify the ancient Chinese water-lifting machines into two categories, i.e., those from original ancient Chinese inventions and the others recreations motivated by western technology. Then, we reason the rationality of the schematic diagrams of these ancient water-lifting machines, providing the reasonable kinematic drawings for those questionable mechanism drawings. Finally, we compare the designs in these two categories and identifying the differences between them in terms of sizing issue, actuation strategy, transmission efficiency and save effort, etc. Keywords: Water-lifting machines, Kinematic diagrams, History of mechanism and machine science.
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Huang, Kuan-Ying, and 黃冠穎. "Research and Development of a Lifting Mechanism for Toilets." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/75k77p.
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碩士國立臺北科技大學
機電整合研究所
99
This study is about the research and development of a lifting mechanism for toilets. Its purpose is to design a lifting mechanism of single-operation, sitting comfort, and saving space, which is suitable for disable users. This research collected, classified, and analyzed all patents about the lifting devices for toilets. A design direction was found from patent analysis. A four-bar kinematic chain satisfying the design conditions was obtained from mechanism synthesis. CAD software was used to construct computer model and to verify interference conditions. CAE software was employed to analyze stress distribution in different operation positions to ensure sufficient strength of the lifting device. Finally, a prototype was built to verify its functions and practicability.
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Shih, Ming-Shan, and 施明杉. "Mechanism Design of Lifting Chair in Vehicle for Handicap." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/pf667w.
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碩士國立清華大學
動力機械工程學系
106
The development of the welfare chair has been 30 years, however it is still not popular and well-known in Taiwan. This thesis will find out the existing patents and configurations of the welfare chair mechanism and try to design a new type of welfare chair guiding mechanism. Owing to the above, this thesis hopes to reduce the manufacturing cost of the welfare chair and let another one can think up and try novel design ideas in future. In this paper, the patents of the inspection and the measurement of the dimension of the seat area of popular vehicles in Taiwan are determined as boundary conditions, and the movement path is planned according to the restriction conditions. After planning the motion path, this study used the solution plane method (alpha-beta plane method) to synthesize the welfare chair guiding mechanism. The researched type of mechanism includes Watt-I six-linkage, Stephenson-I six-linkage and a kind of eight-link. The degree-of-freedom of these mechanisms type is one. After developing the compositing program, the final design of the model verification method can meet the constraints.
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LEE, HSIN HU, and 李新護. "Application of Slider – Crank Mechanism in Lifting a Weight." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/40370419861161764109.
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碩士國立雲林科技大學
機械工程系
104
Abstract In this study, the application of slider – crank mechanism in lifting a weight is discussed. During the mechanism design stage, the effects of significant factors on mechanical performance should be studied. By computer aided software and mechanism theory, the mechanical behaviors can be predicted in advance to improve the design accuracy. The position, velocity, and acceleration analysis of each link are performed to predict the mechanism behavior of the slider-crank system. Then the dynamical analysis is carried out to solve the reaction force and torque on each link. The required horse power of motor can be estimated by the driving force. The feasible procedures to design a mechanism system is proposed to solve several practical problems.