50 citations · 115 across the 17 of their papers we have counts for
17 papers
Mixed finite element discretization of intrinsic geometrically exact beams for multiplier-free multibody dynamics
Andrea Brugnoli, Philipp L. Kinon, Francesco Sanfedino +2
The Reissner-Simo and Hodges models are two equivalent continuous descriptions of finite-strain beam dynamics. The Reissner-Simo formulation uses displacements and rotations, while…
Robust H2/H-infinity control under stochastic requirements: minimizing conditional value-at-risk instead of worst-case performance
Ervan Kassarian, Francesco Sanfedino, Daniel Alazard +1
Conventional robust H2/H-infinity control minimizes the worst-case performance, often leading to a conservative design driven by very rare parametric configurations. To reduce this…
Worst-case search in constrained uncertainty space for robust H-infinity synthesis
Ervan Kassarian, Francesco Sanfedino, Daniel Alazard +1
Standard linear H-infinity/H2 robust control and analysis tools operate on uncertain parameters assumed to vary independently within prescribed bounds. This paper extends their cap…
Non-linear dynamics of multibody systems: a system-based approach
Daniel Alazard, Francesco Sanfedino, Ervan Kassarian
This paper presents causal block-diagram models to represent the equations of motion of multi-body systems in a very compact and simple closed form. Both the forward dynamics (from…
Dynamics modelling and path optimization for the on-orbit assembly of large flexible structures using a multi-arm robot
Ricardo Rodrigues, Valentin Preda, Francesco Sanfedino +1
This paper presents a comprehensive methodology for modeling an on-orbit assembly mission scenario of a large flexible structure using a multi-arm robot. This methodology accounts…
European Satellite Benchmark for Control Education and Industrial Training
Francesco Sanfedino, Paolo Iannelli, Daniel Alazard +3
To overcome the innovation gap of the Guidance, Navigation and Control (GNC) design process between research and industrial practice a benchmark of industrial relevance has been de…
Modeling and analysis of a flexible spinning Euler-Bernoulli beam with centrifugal stiffening and softening: A Linear Fractional Representation approach with application to spinning spacecraft
Ricardo Rodrigues, Daniel Alazard, Francesco Sanfedino +2
The derivation of a linear fractional representation (LFR) model for a flexible, spinning and uniform Euler-Bernoulli beam is accomplished using the {Lagrange} technique, fully cap…
Graph-Based Convexification of Nested Signal Temporal Logic Constraints for Trajectory Optimization
Thomas Claudet, Davide Martire, Damiana Losa +2
Optimizing high-level mission planning constraints is traditionally solved in exponential time and requires to split the problem into several ones, making the connections between t…
Robust Optimization, Structure/Control co-design, Distributed Optimization, Monolithic Optimization, Robust Control, Parametric Uncertainty
Francesco Sanfedino, Daniel Alazard, Andy Kiley +3
This paper presents an end-to-end framework for robust structure/control optimization of an industrial benchmark. When dealing with space structures, a reduction of the spacecraft…
Satellite Dynamics Toolbox Library: a tool to model multi-body space systems for robust control synthesis and analysis
Francesco Sanfedino, Daniel Alazard, Ervan Kassarian +1
The level of maturity reached by robust control theory techniques nowadays contributes to a considerable minimization of the development time of an end-to-end control design of a s…
Advances in Fine Line-Of-Sight Control for Large Space Flexible Structures
Francesco Sanfedino, Gabriel Thiébaud, Daniel Alazard +2
The increased need in pointing performance for Earth observation and science Space missions together with the use of lighter and flexible structures directly come with the need of…
Modeling, robust control synthesis and worst-case analysis for an on-orbit servicing mission with large flexible spacecraft
Ricardo Rodrigues, Valentin Preda, Francesco Sanfedino +1
This paper outlines a complete methodology for modeling an on-orbit servicing mission scenario and designing a feedback control system for the attitude dynamics that is guaranteed…
Sub-Structuring Modeling of Large Space Truss Structures for Structure/Control Optimization in Presence of Parametric Uncertainties
Antonio Finozzi, Francesco Sanfedino, Daniel Alazard
Modern and future high precision pointing space missions face increasingly high challenges related to the widespread use of large flexible structures. The development of new modeli…
Robust line-of-sight pointing control on-board a stratospheric balloon-borne platform
Ervan Kassarian, Francesco Sanfedino, Daniel Alazard +2
This paper addresses the lack of a general methodology for the controller synthesis of an optical instrument on-board a stratospheric balloon-borne platform, such as a telescope or…
Linear Fractional Transformation modeling of multibody dynamics around parameter-dependent equilibrium
Ervan Kassarian, Francesco Sanfedino, Daniel Alazard +2
This paper proposes a new Linear Fractional Transformation (LFT) modeling approach for uncertain Linear Parameter Varying (LPV) multibody systems with parameter-dependent equilibri…
Worst-Case Pointing Performance Analysis for Large Flexible Spacecraft
Ilham Courie, Francesco Sanfedino, Daniel Alazard
This paper presents a tool, PELIB, developed in MATLAB /SIMULINK environment to perform pointing performance analysis based on European pointing standards. PELIB is designed as an…
Integrated modelling of microvibrations induced by Solar Array Drive Mechanism for worst-case end-to-end analysis and robust disturbance estimation
Francesco Sanfedino, Daniel Alazard, Valentin Preda +1
Modern and future observation Space missions face increasingly more demanding pointing performance requirements. This is accompanied with the development of larger lightweight flex…