5 citations · 5 across the 5 of their papers we have counts for
7 papers
Tropicalization and degeneration of short flag varieties and their fibers
Hannah Markwig, Michael Schlößer
Tropicalizations of Grassmannians resp. flag varieties parametrizing (flags of) linear spaces have been studied intensely and reveal rich combinatorial structure. Linear degenerati…
Control of Decommissioned Satellites and Space Debris Using CubeSats with Ion Electrospray Engines
Felix Biertümpfel, Peter Seiler, Paulo Lozano +1
The emergence of the New Space era has led to a rapidly increasing number of satellites in Low Earth Orbit (LEO). Consequently, more stringent deorbiting requirements have recently…
A Robust Periodic Controller for Spacecraft Attitude Tracking
Frederik Thiele, Felix Biertümpfel, Harald Pfifer
This paper presents a novel approach for robust periodic attitude control of satellites. Respecting the periodicity of the satellite dynamics in the synthesis allows to achieve con…
Control Synthesis Along Uncertain Trajectories Using Integral Quadratic Constraints
Felix Biertümpfel, Peter Seiler, Harald Pfifer
The paper presents a novel approach to synthesize robust controllers for nonlinear systems along perturbed trajectories. The approach linearizes the system with respect to a refere…
Linear Parameter Varying Attitude Control For CubeSats Using Electrospray Thrusters
Felix Biertümpfel, Emily Burgin, Hanna-Lee Harjono +2
This paper proposes the design of a single linear parameter-varying (LPV) controller for the attitude control of CubeSats using electro spray thrusters. CubeSat attitude control ba…
Finite Horizon Worst-Case Analysis of Linear Time-Varying Systems Applied to Launch Vehicle
Felix Biertümpfel, Nantiwat Pholdee, Samir Bennani +1
This paper presents an approach to compute the worst-case gain of the interconnection of a finite time horizon linear time-variant system and a perturbation. The input/output behav…
An Overview of Integral Quadratic Constraints for Delayed Nonlinear and Parameter-Varying Systems
Harald Pfifer, Peter Seiler
A general framework is presented for analyzing the stability and performance of nonlinear and linear parameter varying (LPV) time delayed systems. First, the input/output behavior…