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| | '''Kinematics''' is the branch of [[classical mechanics]] which describes the [[motion (physics)|motion]] of points, bodies (objects) and systems of bodies (groups of objects) without looking at the cause of this motion.<ref name="Whittaker"> | | '''Kinematics''' is the branch of [[classical mechanics]] which describes the [[motion (physics)|motion]] of points, bodies (objects) and systems of bodies (groups of objects) without looking at the cause of this motion.<ref name="Whittaker"> |
| − | {{cite book |title=A Treatise on the Analytical Dynamics of Particles and Rigid Bodies |author=Edmund Taylor Whittaker |url=https://books.google.com/books?id=epH1hCB7N2MC&printsec=frontcover&dq=inauthor:%22E+T+Whittaker%22&lr=&as_brr=0&sig=SN7_oYmNYM4QRSgjULXBU5jeQrA&source=gbs_book_other_versions_r&cad=0_2#PPA1,M1 | + | {{cite book |title=A Treatise on the Analytical Dynamics of Particles and Rigid Bodies |author=Edmund Taylor Whittaker |url=https://books.google.com/books?id=epH1hCB7N2MC |
| − | |at=Chapter 1 |year=1904 |publisher=Cambridge University Press |isbn=0-521-35883-3}}</ref><ref name=Beggs>{{cite book |title=Kinematics |author=Joseph Stiles Beggs |page=1 |url=https://books.google.com/books?id=y6iJ1NIYSmgC&printsec=frontcover&dq=kinematics&lr=&as_brr=0&sig=brRJKOjqGTavFsydCzhiB3u_8MA#PPA1,M1 |isbn=0-89116-355-7 |year=1983 |publisher=Taylor & Francis}}</ref><ref name=Wright>{{cite book |title=Elements of Mechanics Including Kinematics, Kinetics and Statics|author=Thomas Wallace Wright |url=https://books.google.com/books?id=-LwLAAAAYAAJ&printsec=frontcover&dq=mechanics+kinetics&lr=&as_brr=0#PPA6,M1 |at=Chapter 1 |year=1896 |publisher=E and FN Spon}}</ref> The term was translated from French; [[André-Marie Ampère|A.M. Ampère]] used the term ''cinématique''.<ref>{{cite book | + | |at=Chapter 1 |year=1904 |publisher=Cambridge University Press |isbn=0-521-35883-3}}</ref><ref name=Beggs>{{cite book |title=Kinematics |author=Joseph Stiles Beggs |page=1 |url=https://books.google.com/books?id=y6iJ1NIYSmgC&q=kinematics |isbn=0-89116-355-7 |year=1983 |publisher=Taylor & Francis}}</ref><ref name=Wright>{{cite book |title=Elements of Mechanics Including Kinematics, Kinetics and Statics|author=Thomas Wallace Wright |url=https://books.google.com/books?id=-LwLAAAAYAAJ&q=mechanics+kinetics |at=Chapter 1 |year=1896 |publisher=E and FN Spon}}</ref> The term was translated from French; [[André-Marie Ampère|A.M. Ampère]] used the term ''cinématique''.<ref>{{cite book |
| | | last = Ampère | | | last = Ampère |
| | | first = André-Marie | | | first = André-Marie |
| | | authorlink = André-Marie Ampère | | | authorlink = André-Marie Ampère |
| | | title = Essai sur la Pilosophie des Sciences | | | title = Essai sur la Pilosophie des Sciences |
| − | | publisher = Chez Bachelier | + | | year = 1834 |
| − | | url = https://books.google.com/books?id=j4QPAAAAQAAJ&printsec=frontcover&source=gbs_ge_summary_r&cad=0#v=onepage&q&f=false | + | | publisher = Chez Bachelier |
| | + | | url = https://books.google.com/books?id=j4QPAAAAQAAJ |
| | }}</ref> He constructed the term form the [[Ancient Greek language|Greek]] {{lang|grc|κίνημα}}, '''kinema''' (movement, motion), derived from {{lang|grc|κινεῖν}}, '''kinein''' (to move).<ref>{{cite book | | }}</ref> He constructed the term form the [[Ancient Greek language|Greek]] {{lang|grc|κίνημα}}, '''kinema''' (movement, motion), derived from {{lang|grc|κινεῖν}}, '''kinein''' (to move).<ref>{{cite book |
| | | last = Merz | | | last = Merz |
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| | | year = 1903 | | | year = 1903 |
| | | pages = 5 | | | pages = 5 |
| − | | url = https://books.google.com/books?id=toZJAAAAYAAJ&pg=PA5&lpg=PA5}}</ref><ref name= Bottema>{{cite book |title=Theoretical Kinematics |at=preface, p. 5 |url=https://books.google.com/books?id=f8I4yGVi9ocC&printsec=frontcover&dq=kinematics&lr=&as_brr=0&sig=YfoHn9ImufIzAEp5Kl7rEmtYBKc#PPR7,M1 |author=O. Bottema & B. Roth |isbn=0-486-66346-9 |publisher=Dover Publications |year=1990}}</ref> The study of ''kinematics'' is often referred to as the ''geometry of motion.''<ref name="various">See, for example: {{cite book | + | | url = https://books.google.com/books?id=toZJAAAAYAAJ&pg=PA5}}</ref><ref name= Bottema>{{cite book |title=Theoretical Kinematics |at=preface, p. 5 |url=https://books.google.com/books?id=f8I4yGVi9ocC&q=kinematics |author=O. Bottema & B. Roth |isbn=0-486-66346-9 |publisher=Dover Publications |year=1990}}</ref> The study of ''kinematics'' is often referred to as the ''geometry of motion.''<ref name="various">See, for example: {{cite book |
| − | |title=Engineering Mechanics: Dynamics |author=Russell C. Hibbeler |chapter=Kinematics and kinetics of a particle |url=https://books.google.com/books?id=tOFRjXB-XvMC&pg=PA298 |page=298 |isbn=0-13-607791-9 |year=2009 |edition=12th |publisher=Prentice Hall}}, | + | |title=Engineering Mechanics: Dynamics |author=Russell C. Hibbeler |chapter=Kinematics and kinetics of a particle |chapter-url=https://books.google.com/books?id=tOFRjXB-XvMC&pg=PA298 |page=298 |isbn=978-0-13-607791-6 |year=2009 |edition=12th |publisher=Prentice Hall}}, |
| | {{cite book | | {{cite book |
| − | |title=Dynamics of Multibody Systems |author=Ahmed A. Shabana |chapter=Reference kinematics |url=https://books.google.com/books?id=zxuG-l7J5rgC&pg=PA28 |edition=2nd |publisher=Cambridge University Press |year=2003 |isbn=978-0-521-54411-5}}, | + | |title=Dynamics of Multibody Systems |author=Ahmed A. Shabana |chapter=Reference kinematics |chapter-url=https://books.google.com/books?id=zxuG-l7J5rgC&pg=PA28 |edition=2nd |publisher=Cambridge University Press |year=2003 |isbn=978-0-521-54411-5}}, |
| | {{cite book | | {{cite book |
| − | |title=Mechanical Systems, Classical Models: Particle Mechanics |chapter=Kinematics |page=287 |url=https://books.google.com/books?id=k4H2AjWh9qQC&pg=PA287 |author=P. P. Teodorescu |isbn=1-4020-5441-6 |year=2007 |publisher=Springer}} | + | |title=Mechanical Systems, Classical Models: Particle Mechanics |chapter=Kinematics |page=287 |chapter-url=https://books.google.com/books?id=k4H2AjWh9qQC&pg=PA287 |author=P. P. Teodorescu |isbn=978-1-4020-5441-9 |year=2007 |publisher=Springer}} |
| | </ref> | | </ref> |
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| | Certain geometric transformations which are called [[rigid transformation]]s have been developed to describe the movement of components of a [[mechanical system]]. These transformations simplify the derivation of its equations of motion, and is central to [[Lagrangian mechanics|dynamic analysis]]. | | Certain geometric transformations which are called [[rigid transformation]]s have been developed to describe the movement of components of a [[mechanical system]]. These transformations simplify the derivation of its equations of motion, and is central to [[Lagrangian mechanics|dynamic analysis]]. |
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| − | [[robot kinematics|Kinematic analysis]] is the process of measuring the [[Physical quantity|kinematic quantities]] used to describe motion. In engineering, kinematic analysis may be used to find the range of movement for a given [[Mechanism (engineering)|mechanism]], and, working in reverse, [[Burmester theory|kinematic synthesis]] designs a mechanism for a desired range of motion.<ref name=McCarthy2010>J. M. McCarthy and G. S. Soh, 2010, [https://books.google.com/books?id=jv9mQyjRIw4C&pg=PA231&lpg=PA231&dq=geometric+design+of+linkages&source=bl&ots=j6TS1043qE&sig=R5ycw5DximWrQOEVshfiytflD6Q&hl=en&sa=X&ei=0Zj4TuiCFvCGsgKyvO3FAQ&ved=0CGAQ6AEwBQ#v=onepage&q=geometric%20design%20of%20linkages&f=false ''Geometric Design of Linkages,''] Springer, New York.</ref> <!-- I am not sure that these are the best examples: The movement of a crane and the oscillations of a piston in an engine are both simple kinematic systems. The crane is a type of open kinematic chain, while the piston is part of a closed [[four-bar linkage]].--> In addition, ''kinematics'' applies algebraic geometry to the study of the [[mechanical advantage]] of a [[mechanical system]], or [[mechanism (engineering)|mechanism]]. | + | [[robot kinematics|Kinematic analysis]] is the process of measuring the [[Physical quantity|kinematic quantities]] used to describe motion. In engineering, kinematic analysis may be used to find the range of movement for a given [[Mechanism (engineering)|mechanism]], and, working in reverse, [[Burmester theory|kinematic synthesis]] designs a mechanism for a desired range of motion.<ref name=McCarthy2010>J. M. McCarthy and G. S. Soh, 2010, [https://books.google.com/books?id=jv9mQyjRIw4C&dq=geometric+design+of+linkages&pg=PA231 ''Geometric Design of Linkages,''] Springer, New York.</ref> <!-- I am not sure that these are the best examples: The movement of a crane and the oscillations of a piston in an engine are both simple kinematic systems. The crane is a type of open kinematic chain, while the piston is part of a closed [[four-bar linkage]].--> In addition, ''kinematics'' applies algebraic geometry to the study of the [[mechanical advantage]] of a [[mechanical system]], or [[mechanism (engineering)|mechanism]]. |
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| − | ==References== | + | == Kinematics Media == |
| | + | <gallery widths='160px' heights='100%' mode='traditional' caption=''> |
| | + | File:Kinematics.svg|Kinematic quantities of a classical particle: mass ''m'', position '''r''', velocity '''v''', acceleration '''a'''. |
| | + | |
| | + | File:Distancedisplacement.svg|The distance travelled is always greater than or equal to the displacement. |
| | + | |
| | + | File:Relative velocity.svg|Relative velocities between two particles in classical mechanics. |
| | + | |
| | + | File:Velocity Time physics graph.jpg|Velocity Time physics graph |
| | + | |
| | + | File:Nonuniform circular motion.svg|Nonuniform circular motion |
| | + | |
| | + | File:The Kinematics of Machinery - Figure 3.jpg|Each particle on the wheel travels in a planar circular trajectory (Kinematics of Machinery, 1876). |
| | + | |
| | + | File:SteamEngine Boulton&Watt 1784.png|The movement of each of the components of the Boulton & Watt Steam Engine (1784) is modeled by a continuous set of rigid displacements. |
| | + | |
| | + | File:Rotating body.PNG|Figure 1: The angular velocity vector '''Ω''' points up for counterclockwise rotation and down for clockwise rotation, as specified by the [[right-hand rule]]. Angular position ''θ''(''t'') changes with time at a rate {{nowrap|1=''ω''(''t'') = d''θ''/d''t''}}. |
| | + | |
| | + | File:Kinematics of Machinery - Figure 21.jpg|Illustration of a four-bar linkage from [[:s:The Kinematics of Machinery|Kinematics of Machinery, 1876]] |
| | + | </gallery> |
| | + | == References == |
| | {{reflist}} | | {{reflist}} |
| | | | |
| | [[Category:Mechanics]] | | [[Category:Mechanics]] |