# Analytical mechanics (2017/2018) Course code
4S001102
Name of lecturer
Nicola Sansonetto
Coordinator
Nicola Sansonetto
Number of ECTS credits allocated
6
MAT/07 - MATHEMATICAL PHYSICS
Language of instruction
English
Period
II sem. dal Mar 1, 2018 al Jun 15, 2018.

#### Learning outcomes

The class is devoted to a modern study of classical mechanics from a mathematical point of view. The aim of the class is to introduce the tools and techniques of global and numerical analysis, differential geometry and dynamical systems to formalise a model of classical mechanics.
At the end of the class a student should be able to construct a model of physical phenomena of mechanical type, write the equations of motion in Lagrangian and Hamiltonian form and analyse the dynamical aspects of the problem.

#### Syllabus

• Introduction. At the beginning of the course we will quickly review some basic aspects of dynamical systems using the modern tools of differential geometry and global analysis. Vector fields on a manifolds, flow and conjugation of vector fields. First integrals, foliation of the phase space and reduction of order for a ODE. 1-dimensional mechanical systems.

• Newtonian mechanics. The structure of the Galilean space-time and the axioms of mechanics. Systems of particles: cardinal equations. Conservative force fields. Mass particle in a central field force and the problem of two bodies.

• Variational principles. Introduction to the calculus of variations: Hamilton’s principle and the equivalence between Newton and Lagrangian equations for conservative systems. Legendre transformation and Hamilton equations.

• Lagrangian mechanics on manifolds. Constrained systems: d’Alembert principle and Lagrange equations. Models of constraints and their equivalence. Invariance of Lagrange equations for change of coordinates. Jacobi integral. Noether’s Theorem, conserved quantities and Routh’s reduction.

• Hamiltonian mechanics. Hamilton equations, Poisson brackets. Noether’s Theorem from the Hamiltonian point of view.

• Rigid bodies. Orthonormal basis, orthogonal and skew-symmetric matrices. Space and body frame: angular velocities. Cardinal equations in different reference frames. A model for rigid bodies. Euler’s equations.

Some qualitative numerical aspects will also been investigated. The course will also include seminars in geometric mechanics, geometric control theory and applications to robotics and surgical robotics.

 Author Title Publisher Year ISBN Note D.D. Holm, T. Schmah and C. Stoica Geometric Mechanics and Symmetry: From Finite to Infinite Dimensions (Edizione 1) Oxford University Press 2009 Darryl D. Holm Geometric Mechanics, Part 1: Dynamics and Symmetry (2nd Edition) (Edizione 2) Imperial College Press 2011 978-1-84816-775-9 Darryl D. Holm Geometric Mechanics, Part 2: Rotating, translating and rolling. (2nd Edition) (Edizione 2) Imperial College Press 2011 978-1-84816-778-0 V.I. Arnol'd Mathematical Methods of Classical Mechanics Springer-Verlag 1989

#### Assessment methods and criteria

The exam will be divided in two part: Part A. consists on a written text with some practical or theoretical questions followed by (Part B.) an oral examination where the written examination is discussed and other aspects are explored.