2 citations · 4 across the 18 of their papers we have counts for
20 papers
Covariant Euler-Poincaré Reduction for Field Theories on Centered Semidirect Products
Miguel Ángel Berbel, Leonardo Colombo, Álvaro Rodríguez Abella
Let be a Lie group equipped with commuting left and right linear representations on a vector space , and let be the associated centered semidirect product. We dev…
Stable Walking for Bipedal Locomotion under Foot-Slip via Virtual Nonholonomic Constraints
Leonardo Colombo, Álvaro Rodríguez Abella, Alexandre Anahory Simoes +1
Foot slip is a major source of instability in bipedal locomotion on low-friction or uncertain terrain. Standard control approaches typically assume no-slip contact and therefore de…
Virtual nonlinear nonholonomic constraints from a symplectic point of view
Efstratios Stratoglou, Alexandre Anahory Simoes, Anthony Bloch +1
In this paper, we provide a geometric characterization of virtual nonlinear nonholonomic constraints from a symplectic perspective. Under a transversality assumption, there is a un…
Retraction maps in optimal control of nonholonomic systems
Alexandre Anahory Simoes, María Barbero Liñán, Anthony Bloch +2
In this paper, we compare the performance of different numerical schemes in approximating Pontryagin's Maximum Principle's necessary conditions for the optimal control of nonholono…
Variational Collision Integrators for Nonholonomic Lagrangian Systems
Álvaro Rodríguez Abella, Leonardo Colombo
A discrete theory for implicit nonholonomic Lagrangian systems undergoing elastic collisions is developed. It is based on the discrete Lagrange-d'Alembert-Pontryagin variational pr…
Geometric Stabilization of Virtual Nonlinear Nonholonomic Constraints
Efstratios Stratoglou, Alexandre Anahory Simoes, Anthony Bloch +1
In this paper, we address the problem of stabilizing a system around a desired manifold determined by virtual nonlinear nonholonomic constraints. Virtual constraints are relationsh…
Nonholonomic mechanics and virtual constraints on Riemannian homogeneous spaces
Efstratios Stratoglou, Alexandre Anahory Simoes, Anthony Bloch +1
Nonholonomic systems are, so to speak, mechanical systems with a prescribed restriction on the velocities. A virtual nonholonomic constraint is a controlled invariant distribution…
Geometric stabilization of virtual linear nonholonomic constraints
Alexandre Anahory Simoes, Anthony Bloch, Leonardo Colombo +1
In this paper, we give sufficient conditions for and deduce a control law under which a mechanical control system converges exponentially fast to a virtual linear nonholonomic cons…
Comparison of two numerical methods for Riemannian cubic polynomials on Stiefel manifolds
Alexandre Anahory Simoes, Leonardo Colombo, Fátima Silva Leite
In this paper we compare two numerical methods to integrate Riemannian cubic polynomials on the Stiefel manifold . The first one is the adjusted de Casteljau alg…
The Interplay Between Symmetries and Impact Effects on Hybrid Mechanical Systems
William Clark, Leonardo Colombo, Anthony Bloch
Hybrid systems are dynamical systems with continuous-time and discrete-time components in their dynamics. When hybrid systems are defined on a principal bundle we are able to defin…
Variational Lifting and Optimal Gauges on Riemannian Homogeneous Spaces
Jacob R. Goodman, Leonardo J. Colombo
Building on standard Euler-Poincaré reduction on Lie groups, we develop a variational lifting framework for mechanical systems on Riemannian homogeneous spaces . A mechanica…
On the integrability of hybrid Hamiltonian systems
Asier López-Gordón, Leonardo J. Colombo
A hybrid system is a system whose dynamics are controlled by a mixture of both continuous and discrete transitions. The integrability of Hamiltonian systems is often identified wit…
Virtual Holonomic and Nonholonomic Constraints on Lie groups
A. Anahory Simoes, A. Bloch, L. Colombo +1
This paper develops a geometric framework for virtual constraints on Lie groups, with emphasis on mechanical systems modeled as affine connection systems. Virtual holonomic and vir…
Nonholonomic reduction for mechanical systems with collisions
Álvaro Rodríguez Abella, Leonardo J. Colombo
This paper studies nonsmooth variational problems on principal bundles for nonholonomic systems with collisions taking place in the boundary of the manifold configuration space of…
Implicit Nonholonomic Mechanics with Collisions
Álvaro Rodríguez Abella, Leonardo Colombo
In this paper, variational techniques are used to analyze the dynamics of nonholonomic mechanical systems with impacts. Implicit nonholonomic smooth Lagrangian and Hamiltonian syst…
Optimal Control of Incompressible Ideal Flows with Obstacle Avoidance
Alexandre Anahory Simoes, Anthony Bloch, Leonardo Colombo
It was shown in \cite{bloch2000optimal} that an optimal control formulation for incompressible ideal fluid flow yields Euler's equations. In this paper, we consider a variational o…
Reduction of Necessary Conditions for the Variational Collision Avoidance Problem
Jacob R. Goodman, Leonardo J. Colombo
In this work, we study the reduction by a Lie group of symmetries of variational collision avoidance probelms of multiple agents evolving on a Riemannian manifold and derive necess…
Reduction of Sufficient Conditions in Variational Obstacle Avoidance Problems
Jacob R. Goodman, Leonardo J. Colombo
This paper studies sufficient conditions in a variational obstacle avoidance problem on complete Riemannian manifolds. That is, we minimize an action functional, among a set of adm…
On the Geometry of Virtual Nonlinear Nonholonomic Constraints
Efstratios Stratoglou, Alexandre Anahory Simoes, Anthony Bloch +1
Virtual constraints are relations imposed on a control system that become invariant via feedback control, as opposed to physical constraints acting on the system. Nonholonomic syst…
Learning-Based Fault-Tolerant Control for an Hexarotor with Model Uncertainty
Leonardo J. Colombo, Manuela Gamonal Fernandez, Juan I. Giribet
In this paper we present a learning-based tracking controller based on Gaussian processes (GP) for a fault-tolerant hexarotor in a recovery maneuver. In particular, to estimate cer…