Relevant bibliographies by topics / Center of gravity position

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Center of gravity position'

Author: Grafiati
Published: 4 June 2021
Last updated: 30 May 2022

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Journal articles on the topic "Center of gravity position"

1

Zhao, Xin Tong, H. Z. Jiang, S. T. Zheng, and Jun Wei Han. "Precision Gravity Center Position Measurement System for Heavy Vehicles." Key Engineering Materials 315-316 (July 2006): 788–91. http://dx.doi.org/10.4028/www.scientific.net/kem.315-316.788.

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Knowledge of a vehicle’s inertial parameters is essential for safety research and accident reconstruction. A precision measure system is proposed to determine the weight and gravity center for heavy vehicles. Based on a static gravity measuring principle with three measuring points, a hydraulically driven 2-DOF motion platform is developed. The transfer function model is derived for the hydraulically driven system. By means of a degree-of-freedom control scheme, the platform can realize accurate positioning to construct two intersected planes and work out the three-dimensional coordinates of the vehicle gravity center. Experiments demonstrate that the system has less than 0.3% measurement error in weight, and is able to measure the gravity centre accurately with deviation ≤3mm in X and Y direction, and ≤5mm in Z direction.
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Lynch, Thomas B., Harry V. Wiant Jr., and David W. Patterson. "Comparison of log volume estimates using formulae for log center of gravity and center of volume." Canadian Journal of Forest Research 24, no. 1 (January 1, 1994): 133–38. http://dx.doi.org/10.1139/x94-018.

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Formulae for estimating log center of gravity for logs of uniform density are presented that are based on frusta of simple solids of revolution. The center of gravity position for logs shaped as cones, paraboloids, paracones, neiloids, and logs having intermediate shapes can be estimated by using these formulae. A comparison of log volume estimates was made using the center of gravity and the center of volume locations as interlog positions for diameter measurements. The center of volume was found to be better than the center of gravity for log volume estimation. However, formulae for log center of gravity should be useful for engineering applications with logs of uniform density.
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Tsukanov, Ruslan U., and Victor I. Ryabkov. "ОЦІНКА ВПЛИВУ ЦЕНТРУВАННЯ НА АЕРОДИНАМІЧНУ ЯКІСТЬ, ПОЛЯРУ І ДАЛЬНІСТЬ ПОЛЬОТУ ЛІТАКА." Open Information and Computer Integrated Technologies, no. 93 (November 19, 2021): 135–45. http://dx.doi.org/10.32620/oikit.2021.93.08.

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The method of transport category airplane flight range estimation taking into account its center-of-gravity position variation in the process of fuel utilization at cruising flight mode is presented. The method structure includes the following models:– Interinfluence of main parameters on each other in the process of fuel utilization;– Estimation of CG position influence on lift-to-drag ratio in cruising mode;– Quantitative estimation of center-of-gravity position variation influence on airplane flight range.Simulation of the main parameters is based on authoring researches, establishing interinfluence among geometrical and aerodynamic parameters of wing, parameters of horizontal tail and center-of-gravity position variation caused by fuel utilization in cruise flight. Such model allows estimating airplane center-of-gravity influence on their values and relative position.Aerodynamic parameters variation caused by center-of-gravity shift resulted in necessity to take the influence into account, for required engine thrust variation; that is shown in the publication in the form of dependences allowing to take into account the required thrust variation and their influence on range variation.On the base of interinfluence model and taking into account required thrust variation (with center-of-gravity position shift), lift-to-drag variation has been obtained and analyzed in the form of dependences , for middle airplane of transport category.Expression for estimation of airplane flight range under variable values of its mass and center-of-gravity position is obtained on the base of these models; that allows to increase flight range by means of center-of-gravity position dedicated shift.On the example of mid-range transport airplane, it is shown, that at Mach number and center-of-gravity shift back from to , the increase of flight range makes .On the base of presented models, it is shown, that airplane center-of-gravity position influences lift-to-drag ratio, fuel efficiency and as a result on flight range at cruising flight mode.Application of aft center-of-gravity position allows to decrease engine required thrust (and to decrease fuel consumption), and increase lift-to-drag ratio and airplane flight range.
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Tsukanov, R., V. Ryabkov, and O. Los. "ВПЛИВ ЗМІНИ ЦЕНТРУВАННЯ НА ДАЛЬНІСТЬ ПОЛЬОТУ ЛІТАКА ТРАНСПОРТНОЇ КАТЕГОРІЇ." Open Information and Computer Integrated Technologies, no. 88 (November 6, 2020): 5–14. http://dx.doi.org/10.32620/oikit.2020.88.01.

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The method of transport category airplane flight range estimation taking into account its center-of-gravity position variation in the process of fuel utilization at cruising flight mode is presented. The method structure includes the following models:– Interinfluence of main parameters on each other in the process of fuel utilization;– CG position influence on required thrust values in level flight;– Estimation of CG position influence on lift-to-drag ratio in cruise mode;– Quantitative estimation of center-of-gravity position variation influence on airplane flight range.Simulation of the main parameters is based on authoring researches, which established interinfluence among geometrical and aerodynamic parameters of wing, parameters of horizontal tail and center-of-gravity position variation caused by fuel utilization in cruise flight. Such model allows estimating of airplane center-of-gravity influence their values and their relative position.Aerodynamic parameters variation caused by center-of-gravity shift resulted in necessity to take this influence into account, for required engine thrust variation; that is shown in the publication in the form of dependences P(M, m, xCG) allowing to take into account the required thrust variation and their influence to range variation.On the base of interinfluence model and taking into account required thrust variation (when center-of-gravity position shifts), lift-to-drag variation has been obtained and analyzed in the form of dependences K, KM(M, m, xCG) for middle airplane of transport category.Expression for estimation of airplane flight range under variable values of its mass and center-of-gravity position is obtained on the base of these models; that allows flight range increasing by means of center-of-gravity position dedicated shift.On the example of mid-range transport airplane, it is shown, that at Mach number M = 0.7 and center-of-gravity shift back from xCG = 0.20 to xCG = 0.35, the increase of lift-to-drag ratio makes ΔK = 0.43.On the base of presented models, it is shown, that airplane center-of-gravity position influences lift-to-drag ratio, fuel efficiency and as a result on flight range at cruising flight mode.Application of aft center-of-gravity position allows decreasing of engine required thrust (decreasing fuel consumption), and increasing of lift-to-drag ratio and airplane flight range.
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Tsukanov, Ruslan, and Viktor Riabkov. "Transport category airplane flight range calculation accounting center-of-gravity position shift and engine throttling characteristics." Aerospace technic and technology, no. 5 (October 6, 2021): 4–14. http://dx.doi.org/10.32620/aktt.2021.5.01.

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A problem facing world commercial aviation is a provision of the flight range and an increase in the fuel efficiency of transport category airplanes using fuel trim transfer application, which allows for decreasing airplane trim drag at cruise flight. In the existing mathematical models, center-of-gravity position is usually assumed fixed, but with fuel usage, center-of-gravity shifts within the definite range of center-of-gravity positions. Until the fuel trim transfer was not used in airplanes, the center-of-gravity shift range was rather short, that allowed to use the specified assumption without any considerable mistakes. In case of fuel trim transfer use, center-of-gravity shifts can reach 15…20 % of mean aerodynamic chord, that requires considering the center-of-gravity actual position during the flight range calculation. Early made estimated calculations showed the necessity of following mathematical model improvement using accounting the real engine throttling characteristics. The goal of this publication is to develop a method of flight range calculation taking transport category airplane into account actual center-of-gravity position with fuel using and variation in engine-specific fuel consumption according to their throttling characteristics. On the basis of real data from engine maintenance manuals, formulas are obtained for approximation throttling characteristics of turbofan engines in the form of dimensionless specific fuel consumption (related to the specific fuel consumption at full thrust) dependence on the engine throttling coefficient. A mathematical model (algorithm and its program implementation using С language in Power Unit 11.7 R03 system) has been developed to calculate the airplane flight range accounting its actual center-of-gravity position shift with fuel usage and variation in specific fuel consumption according to engine throttling characteristics. Using comparison with known payload-range diagram, adequacy of developed mathematical model is shown. Recommendations to improve the mathematical model are also given.
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Sieh, Koon-Man, Yue-Yan Chan, Po-Yan Ho, and Kwai-Yau Fung. "What is the best lateral radiograph positioning technique for assessment of sagittal balance: A biomechanical study on influence of different arm positions." Journal of Orthopaedic Surgery 26, no. 2 (May 1, 2018): 230949901877093. http://dx.doi.org/10.1177/2309499018770932.

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Purpose: To evaluate the influence of different arm postures from the physiological standing position using force plate analysis of the gravity line. Methods: Forty healthy volunteered university students were enrolled. Each subject assumed different standing positions including standing with arms resting on the side (control), with fist over the clavicle (clavicular position), with active shoulder flexion in 30°, 60° and 90° with elbows extended (active flexion A), with hand rest on a bar with a static support (passive flexion P), and with hand rest on a bar with a drip stand (passive flexion D). The offset of the gravity line from the heel was measured by force plate analysis. The offset of the gravity line in different arm positions was compared with the control using paired t-test. Results: The mean anterior offset of the gravity line in control position is 39.80% of the foot length. All testing positions showed anterior shift of the gravity line compared with the control position from 0.51% to 7.50%. There were statistically significant changes of the gravity line from the control position in all ( p < 0.05), except in the clavicular position ( p = 0.249). Conclusion: All testing positions cause anterior shifting of the center of gravity from the physiological standing position. Clavicular position is the best comparable posture to the physiological standing position in taking a lateral radiograph. We recommend using the clavicular position as the standard testing position in the assessment of the sagittal profile.
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Wieczorek, Bartosz, Mateusz Kukla, and Łukasz Warguła. "The Symmetric Nature of the Position Distribution of the Human Body Center of Gravity during Propelling Manual Wheelchairs with Innovative Propulsion Systems." Symmetry 13, no. 1 (January 19, 2021): 154. http://dx.doi.org/10.3390/sym13010154.

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Objective: The main objective of the tests conducted was to analyze the position variability of the human body’s center of gravity during propelling the wheelchair, and to demonstrate the properties enabling the description of this variability by means of plane figures with a symmetry axis. A secondary objective was to show the impact of the used manual propulsion type and the wheelchair inclination angle in relation to the plane on the dimensions of the position variability areas of the center of gravity. Method and materials: Three patients participated in the research representing 50 centiles of anthropometric dimensions. Each patient carried out fifteen measurement tests on three wheelchairs for three inclination angles of the wheelchair frame in relation to the level. Each measurement test consisted of five propulsion cycles for which the positions of the center of gravity were determined with the sampling frequency of 100 Hz. The measured positions of the center of gravity were approximated with ellipses containing 95.4% of the measurements conducted, assuming their dimension scaling basis in the form of the double value of standard deviation defined based on the registered results. Results: Based on the measurements conducted, the average values of five ellipses parameters were determined for nine cases in which a variable was the type of wheelchair propulsion and its inclination angle in relation to the level. The area of the highest variability of the position of the center of gravity was measured for the wheelchair with a multispeed transmission. The average dimensions of the ellipse semi-axis amounted to 108.53 mm for the semi-axis a and 29.75 for the semi-axis b, the average position of the ellipse center amounted to x = 114.51 mm and y = −10.53 mm, and the average inclination angle of the ellipse α amounted to −6.92°. The area of the lowest variability of the position of the center of gravity was measured for the wheelchair with a hybrid transmission. In this case, the average dimensions of the ellipse semi-axis amounted to 64.07 mm for the semi-axis a and 33.85 for the semi-axis b; whereas, the average position of the ellipse center amounted to x = 245.13 mm and y = −28.24 mm, and the average inclination angle of the ellipse α amounted to −0.56°.
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Li, Fang. "Design of Measurement System of the Center of Gravity." Advanced Materials Research 706-708 (June 2013): 733–36. http://dx.doi.org/10.4028/www.scientific.net/amr.706-708.733.

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It is very difficult to confirm the position of the center of gravity irregular object.This paper introduces a new system,which can be used in measuring and adjusting of the center of gravity.The irregular object was put on the support parts,then the center of gravity was given.When the actual position was compared with the ideal position,the difference was given. Until actual position and ideal position were coincided,the machining was continuing. Matlab was programmed in this measure system. It will be applied widely in the future.
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Zhang, Jun. "Three Dimensional Numerical Simulation and Signal Processing Method of Moving Objects in the Change of Gravity." Applied Mechanics and Materials 539 (July 2014): 493–96. http://dx.doi.org/10.4028/www.scientific.net/amm.539.493.

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Based on the three-dimensional rotating coordinate mathematical model, this paper has established the mathematical equations for the principal moments of inertia, the centroid position and the center of gravity position. In order to validate the validity and reliability of this mathematical equation model, the paper designs the three-dimensional virtual simulation system of changes in the center of gravity during the process of computer tennis player. And it analyzes the performance of this system through the prediction of the center of gravity position of athletes. Through the computer GMM technology, we carry out the probability and statistics for the boundary of gravity position path and have obtained the GMM gravity statistical plane distribution map and three-dimensional distribution map. According to the distribution map, we obtain the change table of the gravity and the centroid position. It has been introduced to guide the movement training of tennis players, which has provided technical reference for tennis players training.
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Hsu, Ming Ying, W. C. Lin, Chia Yen Chan, C. F. Ho, S. T. Chang, and Ting Ming Huang. "The Telescope Primary Mirror Isostatic Mount Bonding Position Analysis." Applied Mechanics and Materials 284-287 (January 2013): 2812–15. http://dx.doi.org/10.4028/www.scientific.net/amm.284-287.2812.

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The telescope primary mirror Isostatic Mount (ISM) design is an important issue for optical performance. The ISM bonding position will affect the telescope performance. The primary mirror reflection surface is parallel with gravity force during telescope alignment process. Thus, the distance between ISM geometry center and primary mirror center of gravity will lead mirror surface deformation. The ISM mounting mainly aberration is astigmatism at mirror surface. This study is applied Finite Element (FEM) simulate mirror surface deformation and using Zernike polynomial fitting the mirror surface aberration. The simulation result show the ISM bonding at mirror neutral plane the aberration will minimum at 1G gravity. The ISM bonding position errors also affect aberration distribution.
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Dissertations / Theses on the topic "Center of gravity position"

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Корж, Павло Олегович. "Аванпроект середньомагістрального літака пасажиромісткістю до 44 осіб." Thesis, Національний авіаційний університет, 2020. http://er.nau.edu.ua/handle/NAU/43540.

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Робота публікується згідно наказу ректора від 21.01.2020 р. №008/од "Про перевірку кваліфікаційних робіт на академічний плагіат 2019-2020р.р. навчальному році". Керівник проекту: доцент, к. т. н. Закієв Вадим Ісламович
Object of the design is development of cargo aircraft with the possibility to accommodate up 44 passengers. The aim of the diploma work is the preliminary design of the aircraft and its design characteristic estimation. The method of design is analysis of the prototypes and selections of the most advanced technical decisions, analysis of centre of gravity position. The diploma work contains drawings of the middle-range aircraft with passenger capacity up to 44 passengers, calculations and drawings of the aircraft layout. The results of the diploma work can be implemented to the academic education and also it can be used for the design bureaus.
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Ігнатов, Роман Олександрович. "Аванпроект середньомагістрального літака пасажиромісткістю до 100 осіб." Thesis, Національний авіаційний університет, 2020. http://er.nau.edu.ua/handle/NAU/43638.

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Робота публікується згідно наказу ректора від 21.01.2020 р. №008/од "Про перевірку кваліфікаційних робіт на академічний плагіат 2019-2020р.р. навчальному році". Керівник проекту: доцент, к.т.н. Закієв Вадим Ісламович
Object of the design is development of middle range aircraft with the possibility to accommodate 90 passengers. Aim of the diploma work is the development of the aircraft preliminary and its design characteristic estimation. The method of design is analysis of the prototypes and selections of the most advanced technical decisions. The diploma work contains drawings of the aircraft for corporate transportation, calculations and drawings of the aircraft layout and lever.
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Захірі, Амір Хоссеін Алі. "Аванпроект середньомагiстрального літака вантажопідйомністю до 76 тонн." Thesis, Національний авіаційний університет, 2020. http://er.nau.edu.ua/handle/NAU/43818.

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Робота публікується згідно наказу ректора від 21.01.2020 р. №008/од "Про перевірку кваліфікаційних робіт на академічний плагіат 2019-2020р.р. навчальному році". Керівник проекту: доцент, к.т.н. Маслак Тетяна Петрівна
Object of the design is development of cargo aircraft with the possibility to transport cargo of 76 tons. Aim of the diploma work is the preliminary design of the aircraft and its design characteristic estimation. The method of design is analysis of the prototypes and selections of the most advanced technical decisions, center of gravity calculations. The diploma work contains drawings of the mid-range aircraft with a carrying capacity of 76 tons, calculations and drawings of the aircraft layout and pallet construction.
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Удеогу, Анжел Нене. "Аванпроєкт середньомагістрального літака пасажиромісткістю до 273 осіб." Thesis, Національний авіаційний університет, 2020. http://er.nau.edu.ua/handle/NAU/43919.

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Робота публікується згідно наказу ректора від 21.01.2020 р. №008/од "Про перевірку кваліфікаційних робіт на академічний плагіат 2019-2020р.р. навчальному році" . Керівник проекту: доцент, к.т.н. Закієв Вадим Ісламович
Object of the design is development of medium range aircraft with capacity of up to 273 passengers. Aim of the diploma work is the development of the aircraft preliminary design and characteristics estimation. The method of the design is analysis of the prototypes and selections of the most advanced technical decisions and analysis of center of gravity. The diploma work contains drawings of design of the medium range aircraft, passenger capacity up to 160 people, calculations and drawings of two categories of the aircrafts layouts and the ULD accomodated inside the cargo airplane. The results of the diploma work can be implemented to the academic education and also it can be used for the design bureaus.
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Довбня, Анастасія Вікторівна. "Аванпроект дальномагістрального літака високої пасажиромісткості." Thesis, Національний авіаційний університет, 2020. http://er.nau.edu.ua/handle/NAU/43635.

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Робота публікується згідно наказу ректора від 21.01.2020 р. №008/од "Про перевірку кваліфікаційних робіт на академічний плагіат 2019-2020р.р. навчальному році". Керівник проекту: доцент, к.т.н. Маслак Тетяна Петрівна
Object of the design is a long range aircraft with a high passenger capacity. Subject of the design – the conceptual design of the pilot seat assembly with stress-strain analysis of the seat rail system. Aim of the diploma work is the preliminary design of the long range passenger aircraft based on the prototypes, layout of the passenger cabin and conceptual design of the pilot seat. The method of design is analysis of the prototypes and selections of the most advanced technical decisions, the geometrical characteristics estimation, centre of gravity calculations of the designing aircraft, stress-strain analysis of the rail seat system, Practical implementation of the results is defined by the designing of the long range aircraft with a high passenger capacity, calculations and drawings of the aircraft layout and conceptual design of the pilot’s seat. The materials of the diploma could be recommended for the students of aviation specialties, for the aircraft operational companies, etc.
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Зозуля, Антон Ігорович. "Аванпроект ближньомагiстрального літака пасажиромісткістю до 50 осіб." Thesis, Національний авіаційний університет, 2020. http://er.nau.edu.ua/handle/NAU/43538.

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Робота публікується згідно наказу ректора від 21.01.2020 р. №008/од "Про перевірку кваліфікаційних робіт на академічний плагіат 2019-2020р.р. навчальному році". Керівник проекту: старший викладач Краснопольський Володимир Сергійович
Object of the design is development of passenger aircraft with the possibility to carry 50 passengers. Aim of the diploma work is the development of the aircraft preliminary design and its characteristic estimation. The method of design is analysis of the prototypes and selections of the most advanced technical decisions. The diploma work contains drawings of the short range aircraft with 50 passengers, calculations and drawings of the aircraft layout and design of control system elements. The result of diploma work can be implemented in working process, aircraft documentation formation, and it can be used in design bureaus.
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Артюх, Ростислав Віталійович. "Аванпроект дальномагістрального літака високої пасажиромісткості." Thesis, Національний авіаційний університет, 2020. http://er.nau.edu.ua/handle/NAU/43639.

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Робота публікується згідно наказу ректора від 21.01.2020 р. №008/од "Про перевірку кваліфікаційних робіт на академічний плагіат 2019-2020р.р. навчальному році". Керівник проекту: професор, д.т.н. Карускевич Михайло Віталійович
Object of the design is development of cargo short-range aircraft with cargo capacity 7,5 tons. Aim of the diploma work is the preliminary design of the aircraft and its design characteristic estimation. The method of design is analysis of the prototypes and selections of the most advanced technical decisions, the geometrical characteristics estimation, centre of gravity calculations of the designing aircraft. The diploma work contains drawings of the short-range aircraft with a carrying capacity of 7,5 tons, calculations and drawings of the aircraft layout and ball mat. The materials of the diploma could be recommended for the students of aviation specialties, for the aircraft operational companies, etc.
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Кравченко, Валерія Денисівна. "Аванпроект вантажного ближньомагістрального літака вантажопідйомністю до 5,5 тон." Thesis, Національний авіаційний університет, 2020. http://er.nau.edu.ua/handle/NAU/43637.

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Робота публікується згідно наказу ректора від 21.01.2020 р. №008/од "Про перевірку кваліфікаційних робіт на академічний плагіат 2019-2020р.р. навчальному році". Керівник проекту: професор, д.т.н. Карускевич Михайло Віталійович
Object of the design is development of cargo short-range aircraft with cargo capacity 5,5 tons. Subject of the design – the conceptual design of the hook suspension improvement with stress-strain analysis of the hook. The aim of the diploma work is the preliminary design of the aircraft and its design characteristic estimation. The method of design is analysis of the prototypes and selections of the most advanced technical decisions, the geometrical characteristics estimation, centre of gravity calculations of the designing aircraft, stress-strain analysis of the hook and its modification. The diploma work contains drawings of the short-range aircraft with a carrying capacity of 5,5 tons, calculations and drawings of the aircraft layout and hook suspension design. The materials of the diploma could be recommended for the students of aviation specialties, for the aircraft operational companies, also it can be used for the design bureaus.
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Савенок, Владислав Валерійович. "Аванпроект середньомагістрального літака пасажиромісткістю до 190 осіб." Thesis, Національний авіаційний університет, 2020. http://er.nau.edu.ua/handle/NAU/43741.

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Робота публікується згідно наказу ректора від 21.01.2020 р. №008/од "Про перевірку кваліфікаційних робіт на академічний плагіат 2019-2020р.р. навчальному році". Керівник проекту: доцент, к.т.н. Юцкевич Святослав Сергійович
Object of the design is development a medium-range passenger aircraft with the possibility to accommodate up to 190 passengers or relayout of passenger cabin to the cargo solution. The aim of the diploma work is the preliminary design of the aircraft and its design characteristic estimation. The method of design is analysis of the prototypes and selections of the most advanced technical decisions, analysis of center of gravity position. The diploma work contains drawings of the middle-range aircraft with capacity up to 190 passengers, calculations and drawings of the aircraft layout and re-equipment for cargo cabin transportation. The practical significance of the result of the bachelor's thesis project is to increase the reliability and efficiency of passenger and cargo air transportation. The materials of the bachelor's thesis project can be used in the educational process and in the practical activities of designers of specialized design institutions.
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Аскарі, Фатеме Садег. "Аванпроект пасажирьского середньомагістрального літака пасажиромісткістю до 160 осіб." Thesis, Національний авіаційний університет, 2020. http://er.nau.edu.ua/handle/NAU/43819.

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Робота публікується згідно наказу ректора від 21.01.2020 р. №008/од "Про перевірку кваліфікаційних робіт на академічний плагіат 2019-2020р.р. навчальному році". Керівник проекту: доцент, к.т.н. Закієв Вадим Ісламович
Object of the design is development of the mid-range aircraft with capacity of up to 160 passengers. Aim of the diploma work is the development of the aircraft preliminary design and characteristic estimation. The method of design is analysis of the prototypes and selections of the most advanced technical decisions and analysis of center of gravity. The diploma work contains drawings of design of the mid-range aircraft, passenger capacity up to 160 people, calculations and drawings of two categories of the aircrafts layouts and the ULD accommodated inside the cargo airplane. The results of the diploma work can be implemented to the academic education and also it can be used for the design bureaus.
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Books on the topic "Center of gravity position"

1

Douglas, Ian. Center of gravity. New York: Harper Voyager, 2011.

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Terras, Melissa, and Gregory Crane, eds. Changing the Center of Gravity. Piscataway, NJ, USA: Gorgias Press, 2010. http://dx.doi.org/10.31826/9781463219222.

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Crane, Gregory, and Melissa M. Terras. Changing the center of gravity: Transforming classical studies through cyberinfrastructure. Piscataway, NJ: Gorgias Press, 2010.

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Ponce, David A. Comparison of survey and photogrammetry methods to position gravity data, Yucca Mountain, Nevada. Menlo Park, Calif: U.S. Dept. of Interior, Geological Survey, 1985.

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Archimedes, the center of gravity, and the first law of mechanics. Montreal: Apeiron, 2008.

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center), ZARM (Research. ZARM: Center of Applied Space Technology and Microgravity. 2nd ed. Bremen: ZARM, University of Bremen, 1990.

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Center, Lewis Research. Microgravity polymers: Proceedings of a workshop sponsored by the NASA Lewis Research Center, Cleveland, Ohio, May 9, 1985. Cleveland, Ohio: Lewis Research Center, 1986.

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Larson, Eric V. (Eric Victor), 1957- author, Boyer Matthew E. author, and Arroyo Center, eds. Vulnerability assessment method pocket guide: A tool for center of gravity analysis. Santa Monica, CA: RAND Arroyo Center, 2014.

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Center, Lewis Research. Microgravity fluid management symposium: Proceedings of a symposium hled at NASA Lewis Research Center, Cleveland, Ohio, September 9-10, 1986. Cleveland, Ohio: Lewis Research Center, 1987.

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Center, Lewis Research. Second Microgravity Fluid Physics Conference: Proceedings of a conference hosted by NASA Lewis Research Center, Cleveland, Ohio, June 21-23, 1994. Cleveland, Ohio: Lewis Research Center, 1994.

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Book chapters on the topic "Center of gravity position"

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Zhao, X. T., H. Z. Jiang, S. T. Zheng, and J. W. Han. "Precision Gravity Center Position Measurement System for Heavy Vehicles." In Advances in Machining & Manufacturing Technology VIII, 788–91. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-999-7.788.

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Mate, Csaba Zoltan, Erzsebet Faluvegi, and Luciana Cristea. "Mathematical Simulation in Center of Gravity Position and Effect of Weight for a Biped Robot." In Power Transmissions, 357–66. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6558-0_27.

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Braune, Wilhelm, and Otto Fischer. "Determining the Position of the Centre of Gravity in the Cadaver." In On the Centre of Gravity of the Human Body, 11–46. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-69611-4_2.

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Hu, Kai, Huichao Deng, Shengjie Xiao, Yuhong Sun, and Shutong Zhang. "Bionic Design and Optimization of a Hoverable Flapping-Wing Micro Air Vehicle with Gravity Center Position Control." In Advances in Mechanical Design, 1879–90. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-7381-8_118.

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Braune, Wilhelm, and Otto Fischer. "Determining the Position of the Centre of Gravity in the Living Body in Different Attitudes and with Different Loads." In On the Centre of Gravity of the Human Body, 47–94. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-69611-4_3.

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Hejda, Jan, Petr Volf, Monika Bačíková, Noa Bar, Cestmír Oberman, Kristýna Rusnáková, Marcela Braunová, and Patrik Kutílek. "Design of a Hybrid Portable System for Measuring the Position of the Spine, Pelvis and Center of Gravity of the Body." In IFMBE Proceedings, 622–33. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-31635-8_75.

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Bayturk, Engin, Sakir Esnaf, and Tarik Kucukdeniz. "A Revised Weighted Fuzzy C-Means and Center of Gravity Algorithm for Probabilistic Demand and Customer Positions." In Advances in Intelligent Systems and Computing, 1523–31. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-51156-2_177.

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Xydas, Evagoras, P. Herodotou, Loucas S. Louca, and Andreas Mueller. "Effect of Links’ Center of Gravity Position on the Performance of a Four-Bar Linkage as an Upper Limb Rehabilitation Mechanism: A Parametric Study." In XIV Mediterranean Conference on Medical and Biological Engineering and Computing 2016, 596–601. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-32703-7_116.

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Greiner, Walter. "Center of Gravity." In Classical Mechanics, 43–65. New York, NY: Springer New York, 2002. http://dx.doi.org/10.1007/978-0-387-21543-3_5.

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Rimrott, F. P. J. "Center of Gravity." In Introductory Attitude Dynamics, 40–75. New York, NY: Springer New York, 1989. http://dx.doi.org/10.1007/978-1-4612-3502-6_2.

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Conference papers on the topic "Center of gravity position"

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Zhao, Xintong, Hongzhou Jiang, Shutao Zheng, and Junwei Han. "Development of high precision gravity center position measurement system for large heavy vehicles." In ICMIT 2005: Control Systems and Robotics, edited by Yunlong Wei, Kil To Chong, Takayuki Takahashi, Shengping Liu, Zushu Li, Zhongwei Jiang, and Jin Young Choi. SPIE, 2005. http://dx.doi.org/10.1117/12.664792.

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Yu, Zitian, and Junmin Wang. "A New Method in Estimating Vehicle Center of Gravity Position Parameters Based on Ackermann’s Steering." In ASME 2016 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/dscc2016-9674.

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The determination of vehicle’s center of gravity position is an important but challenging task for control of advanced vehicles such as automated vehicles, especially under daily usage condition where the system configurations and payload condition may change. To address this problem, a new method is proposed in this paper to estimate the vehicle’s 3-dimensional center of gravity position parameters without relying on detailed suspension configuration parameters or lateral tire force models. In the estimation problem, the vehicle’s planar dynamic equations are synthesized together to reduce the number of unknown lateral tire forces, then the condition of Ackermann’s Steering Geometry can be found to eliminate the influence of the remaining unknown front wheel lateral tire forces. When the unknown tire forces are cancelled, the recursive least squares (RLS) regression technique is used to identify the 3-dimensional center of gravity position parameters. The vehicle model with the sprung mass modeled as an inverted pendulum is developed to assist the analysis and conversion of sensor measured signals. Simulations conducted in a high-fidelity CarSim® vehicle model have demonstrated the capability of this proposed method in estimating the vehicle’s center of gravity position parameters.
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Nakagawa, Chihiro, Kosuke Sato, and Atsuhiko Shintani. "Prediction of Driver’s Center of Gravity Position on a Stand-Up Type PMV Considering Intentions." In ASME 2021 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/detc2021-69357.

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Abstract In recent years, Personal Mobility Vehicles (PMVs) have been attracting attention as a new means of transportation. They are environmentally friendly without exhausting harmful gases. These vehicle bodies are relatively smaller than cars, so they have a high affinity for pedestrian space. However, depending on the specifications of the vehicle, driver’s behaviors have great effect on the vehicle movement because the weight of the vehicle is comparatively low. In addition, applying the automatic driving on PMV will be one of the next steps to make use of PMVs. It is important to understand the dynamic behavior of drivers not only during their intentional driving but also during the automatic driving. In this study, we focused on stand-up type PMVs. We measured driver’s center of gravity and several forces on a standing PMV. From the measurements, we looked at the correlation coefficient, and used multiple regression analysis to derive the prediction equations of driver’s center of gravity position on stand-up type PMVs. These results can be applied to simulate the dynamic motion of the PMV and a driver.
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Yajima, Shotaro, Tomoyuki Shimono, Takahiro Mizoguchi, and Kouhei Ohnishi. "Automatic Grasping Position Adjustment for Robotic Hand by Estimating Center of Gravity Using Disturbance Observer." In 2020 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM). IEEE, 2020. http://dx.doi.org/10.1109/aim43001.2020.9159000.

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Gilbert, Michael G., Daniel A. Godrick, and Richard H. Klein. "The Effect of Longitudinal Center of Gravity Position on the Sway Stability of a Small Cargo Trailer." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-66022.

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Small and mid-sized cargo trailers are often used to transport goods by people with limited experience in loading trailers and driving vehicles with trailers attached. This paper examines the effect of front to rear load position on the stability of a trailer by measuring its dynamic response to a variety of steer inputs at several different highway speeds. Additionally, tests with varying steers and speeds were performed with a simulated suspension malfunction to study the trailer’s dynamic response to this condition. Trailer sway has been a well-documented trailer characteristic for decades. However there are no special driver’s licensing or mandatory training requirements for even large trailers and campers. The trailer chosen for this test was a lightweight double axle cargo trailer commonly rented by people with limited to no towing experience. This consumer is likely to be unfamiliar with the best practices of trailer loading. This consumer is also likely a non-professional driver with little to no towing experience in the event of encountering unexpected trailer sway. Therefore it was the goal of the authors to determine how the stability of this type of trailer varies with different front to rear loading conditions and speeds to see if it is safe to operate on the highways by novice drivers. Trailer sway stability was determined by measuring the trailer sway (articulation) response during repeated, pulse steer tests. The trailer sway damping characteristics were measured, as a “damping ratio”, for six different hitch loads that corresponded to six different longitudinal loading conditions. These conditions, expressed as % load forward of the trailer centerline / % load aft of the trailer centerline were: 65/35, 60/40, 55/45, 50/50, 45/55, and 40/60. These loading conditions were tested per SAE J2664 [1] protocol. The resulting trailer sway characteristics for each loading condition then were compared to published trailer sway stability criteria [2, 3] to determine the suitability of this particular tow vehicle-trailer combination for use by the public in a rental market. The impact of a suspension malfunction on the trailer stability was also studied. This consisted of a detachment of one rear leaf spring hanger.
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Huang, Xiaoyu, and Junmin Wang. "EKF-Based Vehicle Center of Gravity Position Real-Time Estimation in Longitudinal Maneuvers With Road Course Elevation." In ASME 2012 5th Annual Dynamic Systems and Control Conference joint with the JSME 2012 11th Motion and Vibration Conference. ASME, 2012. http://dx.doi.org/10.1115/dscc2012-movic2012-8530.

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Teramura, Masahiro, Noritaka Shigei, and Hiromi Miyajima. "Design of hardware circuit based on a neural network model for rapid detection of center of gravity position." In TENCON 2016 - 2016 IEEE Region 10 Conference. IEEE, 2016. http://dx.doi.org/10.1109/tencon.2016.7848000.

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Romero, José A., Frank Otremba, and Alejandro A. Lozano-Guzmán. "Commodities and Rail Damage." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-86008.

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A simplified roll-plane model is proposed to assess the effect of the vertical position of the center of gravity of the body-cargo system, on the rail fatigue life. A set of assumptions are made to simplify the analysis, including neglecting the bogie’s dynamic contribution to the wheel-rail forces. Three performance measures are defined to assess the effect of different dedicated railway cars on the rail fatigue life, including the fourth-power law, the load dispersion, and the rail fatigue. The simulation results suggest that the vertical position of the center of gravity of the body-cargo set, severely affects the fatigue life of the railway material, with the two-stack car being the most aggressive. For example, twice as aggressive as the gondola car.
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Costa, Daniel de Oliveira, Antonio Carlos Fernandes, Joel Sena Sales Junior, and Peyman Asgari. "Instantaneous Center of Rotation in Pitch Response of a FPSO Submitted to Head Waves." In ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/omae2018-78098.

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When under influence of an incident wave system, any floating body presents a general motion with all six degrees of freedom, unless it presents some kind of restrains on it. For a free moving body, the center of rotation will depend on the force distribution and might not coincide with its center of gravity. For long and slender floating structures, such as FPSO platforms, a small change in the center of Pitch rotation would result in significant change in the overall motions in its fore and aft regions. Therefore, it is of high importance to obtain a better understating of the instantaneous position of the body center of rotation in Heave and Pitch response. This paper investigates the position of the Instantaneous Center of Rotation in Pitch Response of a scaled down model of a FPSO platform under different regular wave conditions. The investigation uses basic kinematics equations for rigid body, defining the 6 degrees of freedom of the rigid body motion from a finite number of markers installed in the model. A high quality tracking system captures the markers positions in order to define the rigid body at each instant of time. For an initial approach, the study considers the response due to head waves seas with experimental validation.
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Ishida, Yukio, Tsuyoshi Inoue, Jun Liu, and Akihiro Suzuki. "Vibration of an Asymmetrical Shaft With Gravity and Nonlinear Spring Characteristics." In ASME 2001 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/detc2001/vib-21629.

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Abstract When an asymmetrical shaft is supported by single-row deep groove ball bearings, nonlinear spring characteristics appear due to clearance of bearings and the stiffness of support at the shaft end differs depending on the direction because the equilibrium position of the shaft center line shifts from the center of the clearance due to gravity and misalignment of assembly. Due to the coexistence of the rotating difference in shaft stiffness, the static difference in stiffness at bearing supports and the nonlinear spring characteristics, various kinds of nonlinear parametric resonances and nonlinear forced resonances occur. In this paper, we studied vibrations of harmonic type and super-combination type. As a result, we clarified the following phenomena, such as, division of unstable range, convergence of an unstable vibration to a limit cycle, resonance curve of a hard spring type, and coexistence of a forward and a backward frequency components.
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Reports on the topic "Center of gravity position"

1

Rose, Ehrich D. Defending America's Center of Gravity. Fort Belvoir, VA: Defense Technical Information Center, March 2006. http://dx.doi.org/10.21236/ada448816.

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Bliss, James A. Al Qaeda's Center of Gravity. Fort Belvoir, VA: Defense Technical Information Center, May 2004. http://dx.doi.org/10.21236/ada423365.

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Grannis, Lawrence A. Center of Gravity - Libya 1989. Fort Belvoir, VA: Defense Technical Information Center, May 1989. http://dx.doi.org/10.21236/ada217357.

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Qualters, Irene. Center for Nonlinear Studies (CNLS) Leader Position. Office of Scientific and Technical Information (OSTI), February 2022. http://dx.doi.org/10.2172/1845231.

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Rowe, Lloyd J., and III. Center of Gravity or Strange Attractor? Fort Belvoir, VA: Defense Technical Information Center, June 1995. http://dx.doi.org/10.21236/ada298214.

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Bolchoz, J. M. Center of Gravity: Justification for Assassination. Fort Belvoir, VA: Defense Technical Information Center, April 1999. http://dx.doi.org/10.21236/ada363034.

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Undeland, David K. Center of Gravity - Use and Misuse. Fort Belvoir, VA: Defense Technical Information Center, May 2001. http://dx.doi.org/10.21236/ada390346.

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Lee, Seow Hiang. Center of Gravity or Center of Confusion: Understanding the Mystique. Fort Belvoir, VA: Defense Technical Information Center, April 1999. http://dx.doi.org/10.21236/ada397314.

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Nishimura, Masatsugu, Yoshitaka Tezuka, Enrico Picotti, Mattia Bruschetta, Francesco Ambrogi, and Toru Yoshii. Study of Rider Model for Motorcycle Racing Simulation. SAE International, January 2020. http://dx.doi.org/10.4271/2019-32-0572.

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Various rider models have been proposed that provide control inputs for the simulation of motorcycle dynamics. However, those models are mostly used to simulate production motorcycles, so they assume that all motions are in the linear region such as those in a constant radius turn. As such, their performance is insufficient for simulating racing motorcycles that experience quick acceleration and braking. Therefore, this study proposes a new rider model for racing simulation that incorporates Nonlinear Model Predictive Control. In developing this model, it was built on the premise that it can cope with running conditions that lose contact with the front wheels or rear wheels so-called "endo" and "wheelie", which often occur during running with large acceleration or deceleration assuming a race. For the control inputs to the vehicle, we incorporated the lateral shift of the rider's center of gravity in addition to the normally used inputs such as the steering angle, throttle position, and braking force. We compared the performance of the new model with that of the conventional model under constant radius cornering and straight braking, as well as complex braking and acceleration in a single (hairpin) corner that represented a racing run. The results showed that the new rider model outperformed the conventional model, especially in the wider range of running speed usable for a simulation. In addition, we compared the simulation results for complex braking and acceleration in a single hairpin corner produced by the new model with data from an actual race and verified that the new model was able to accurately simulate the run of actual MotoGP riders.
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Kohn, Bryan S. Attacking Islamic Terrorism's Strategic Center of Gravity. Fort Belvoir, VA: Defense Technical Information Center, February 2002. http://dx.doi.org/10.21236/ada401841.

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