89 citations · 264 across the 15 of their papers we have counts for
9 papers · 1 filter
Unknown Input Observer Design for Linear Time-Invariant Systems -- A Unifying Framework
Markus Tranninger, Helmut Niederwieser, Richard Seeber +1
This paper presents a new observer design approach for linear time invariant multivariable systems subject to unknown inputs. The design is based on a transformation to the so-call…
Integral state-feedback control of linear time-varying systems: A performance preserving approach
Richard Seeber, Markus Tranninger
An integral extension of state-feedback controllers for linear time-varying plants is proposed, which preserves performance of the nominal controller in the unperturbed case. Simil…
Optimal Robust Exact Differentiation via Linear Adaptive Techniques
Richard Seeber, Hernan Haimovich
The problem of differentiating a function with bounded second derivative in the presence of bounded measurement noise is considered in both continuous-time and sampled-data setting…
Higher-order sliding mode observer design for linear time-invariant multivariable systems based on a new observer normal form
Helmut Niederwieser, Markus Tranninger, Richard Seeber +1
In various applications in the field of control engineering the estimation of the state variables of dynamic systems in the presence of unknown inputs plays an important role. Exis…
Differentiator for Noisy Sampled Signals with Best Worst-Case Accuracy
Hernan Haimovich, Richard Seeber, Rodrigo Aldana-López +1
This paper proposes a differentiator for sampled signals with bounded noise and bounded second derivative. It is based on a linear program derived from the available sample informa…
Detectability Conditions and State Estimation for Linear Time-Varying and Nonlinear Systems
Markus Tranninger, Richard Seeber, Martin Steinberger +2
This work proposes a detectability condition for linear time-varying systems based on the exponential dichotomy spectrum. The condition guarantees the existence of an observer, who…
Designing predefined-time differentiators with bounded time-varying gains
Rodrigo Aldana-López, Richard Seeber, David Gómez-Gutiérrez +2
There is an increasing interest in designing differentiators, which converge exactly before a prespecified time regardless of the initial conditions, i.e., which are fixed-time con…
An arbitrary-order predefined-time exact differentiator for signals with exponential growth bound
David Gómez-Gutiérrez, Rodrigo Aldana-López, Richard Seeber +2
There is a growing interest in differentiation algorithms that converge in fixed time with a predefined Upper Bound on the Settling Time (UBST). However, existing differentiation a…
Strong Detectability and Observers for Linear Time Varying Systems
Markus Tranninger, Richard Seeber, Juan G. Rueda-Escobedo +1
This work presents a notion of strong detectability for linear time varying systems affected by unknown inputs. It is shown that this notion is equivalent to detectability of an au…