23 citations · 50 across the 8 of their papers we have counts for
8 papers
Discrete-time Flatness and Linearization along Trajectories
Bernd Kolar, Johannes Diwold, Conrad Gstöttner +1
The paper studies the relation between a nonlinear time-varying flat discrete-time system and the corresponding linear time-varying systems which are obtained by a linearization al…
Flatness Analysis for the Sampled-data Model of a Single Mast Stacker Crane
Johannes Diwold, Bernd Kolar, Markus Schöberl
We show that the Euler-discretization of the nonlinear continuous-time model of a single mast stacker crane is flat. The construction of the flat output is based on a transformatio…
Discrete-time Flatness-based Controller Design using an Implicit Euler-discretization
Johannes Diwold, Bernd Kolar, Markus Schöberl
In this contribution, we present a constructive method to derive flat sampled-data models for continuous-time flat systems through an implicit Euler-discretization. We show how the…
On the Exact Linearization and Control of Flat Discrete-time Systems
Bernd Kolar, Johannes Diwold, Conrad Gstöttner +1
The paper addresses the exact linearization of flat nonlinear discrete-time systems by generalized static or dynamic feedbacks which may also depend on forward-shifts of the new in…
Discrete-time Flatness-based Control of a Gantry Crane
Johannes Diwold, Bernd Kolar, Markus Schöberl
This article addresses the design of a discrete-time flatness-based tracking control for a gantry crane and demonstrates the practical applicability of the approach by measurement…
A Trajectory-Based Approach to Discrete-Time Flatness
Johannes Diwold, Bernd Kolar, Markus Schöberl
For discrete-time systems, flatness is usually defined by replacing the time-derivatives of the well-known continuous-time definition by forward-shifts. With this definition, the c…
A Normal Form for Two-Input Flat Nonlinear Discrete-Time Systems
Johannes Diwold, Bernd Kolar, Markus Schöberl
We show that every flat nonlinear discrete-time system with two inputs can be transformed into a structurally flat normal form by state- and input transformations. This normal form…
Differential-Geometric Decomposition of Flat Nonlinear Discrete-Time Systems
Bernd Kolar, Markus Schöberl, Johannes Diwold
We prove that every flat nonlinear discrete-time system can be decomposed by coordinate transformations into a smaller-dimensional subsystem and an endogenous dynamic feedback. For…