89 citations · 214 across the 19 of their papers we have counts for
24 papers
Strong exponential stability of switched impulsive systems with mode-constrained switching
Alexis J. Vallarella, José Luis Mancilla-Aguilar, Hernan Haimovich
Strong stability, defined by bounds that decay not only over time but also with the number of impulses, has been established as a requirement to ensure robustness properties for im…
Forward completeness does not imply bounded reachability sets and global asymptotic stability is not necessarily uniform for time-delay systems
Jose L. Mancilla-Aguilar, Hernan Haimovich
An example of a time-invariant time-delay system that is uniformly globally attractive and exponentially stable, hence forward complete, but whose reachability sets from bounded in…
Implementing prescribed-time convergent control: sampling and robustness
Hernan Haimovich, Rodrigo Aldana-Lopez, Richard Seeber +1
According to recent results, convergence in a prespecified or prescribed finite time can be achieved under extreme model uncertainty if control is applied continuously over time. T…
Characterization of integral input-to-state stability for nonlinear time-varying systems of infinite dimension
José L. Mancilla-Aguilar, José E. Rojas-Ruiz, Hernan Haimovich
For large classes of infinite-dimensional time-varying control systems, the equivalence between integral input-to-state stability (iISS) and the combination of global uniform asymp…
On inherent limitations in robustness and performance for a class of prescribed-time algorithms
Rodrigo Aldana-López, Richard Seeber, Hernan Haimovich +1
Prescribed-time algorithms based on time-varying gains may have remarkable properties, such as regulation in a user-prescribed finite time that is the same for every nonzero initia…
On the stability of nonlinear sampled-data systems and their continuous-time limits
Alexis J. Vallarella, Hernan Haimovich
This work deals with the stability analysis of nonlinear sampled-data systems under nonuniform sampling. It establishes novel relationships between the stability property of the ex…
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…
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…
(Integral-)ISS of switched and time-varying impulsive systems based on global state weak linearization
José L. Mancilla-Aguilar, Hernan Haimovich
It is shown that impulsive systems of nonlinear, time-varying and/or switched form that allow a stable global state weak linearization are jointly input-to-state stable (ISS) under…
Semiglobal exponential input-to-state stability of sampled-data systems based on approximate discrete-time models
Alexis J. Vallarella, Paula Cardone, Hernan Haimovich
Exact discrete-time models of nonlinear systems are difficult or impossible to obtain, and hence approximate models may be employed for control design. Most existing results provid…
Robust exact differentiators with predefined convergence time
Richard Seeber, Hernan Haimovich, Martin Horn +2
The problem of exactly differentiating a signal with bounded second derivative is considered. A class of differentiators is proposed, which converge to the derivative of such a sig…
Uniform stability of nonlinear time-varying impulsive systems with eventually uniformly bounded impulse frequency
José L. Mancilla-Aguilar, Hernan Haimovich, Petro Feketa
We provide novel sufficient conditions for stability of nonlinear and time-varying impulsive systems. These conditions generalize, extend, and strengthen many existing results. Dif…
Nonrobustness of asymptotic stability of impulsive systems with inputs
Hernan Haimovich, José L. Mancilla-Aguilar
Suitable continuity and boundedness assumptions on the function f defining the dynamics of a time-varying nonimpulsive system with inputs are known to make the system inherit stabi…
Strong ISS implies strong iISS for time-varying impulsive systems
Hernan Haimovich, José L. Mancilla-Aguilar
For time-invariant (nonimpulsive) systems, it is already well-known that the input-to-state stability (ISS) property is strictly stronger than integral input-to-state stability (iI…
A characterization of strong iISS for time-varying impulsive systems
Hernan Haimovich, Jose L. Mancilla-Aguilar, Paula Cardone
For general time-varying or switched (nonlinear) systems, converse Lyapunov theorems for stability are not available. In these cases, the integral input-to-state stability (iISS) p…
Uniform Input-to-State Stability for Switched and Time-Varying Impulsive Systems
Jose L. Mancilla-Aguilar, Hernan Haimovich
We provide a Lyapunov-function-based method for establishing different types of uniform input-to-state stability (ISS) for time-varying impulsive systems. The method generalizes to…
Characterization of semiglobal stability properties for discrete-time models of non-uniformly sampled nonlinear systems
Alexis J. Vallarella, Hernan Haimovich
Discrete-time models of non-uniformly sampled nonlinear systems under zero-order hold relate the next state sample to the current state sample, (constant) input value, and sampling…
State measurement error-to-state stability results based on approximate discrete-time models
A. J. Vallarella, H. Haimovich
Digital controller design for nonlinear systems may be complicated by the fact that an exact discrete-time plant model is not known. One existing approach employs approximate discr…
A Characterization of Integral ISS for Switched and Time-varying Systems
H. Haimovich, J. L. Mancilla-Aguilar
Most of the existing characterizations of the integral input-to-state stability (iISS) property are not valid for time-varying or switched systems in cases where converse Lyapunov…
Large-signal stability conditions for semi-quasi-Z-source inverters: switched and averaged models
Hernan Haimovich, Richard H. Middleton, Lisandro De Nicolo
The recently introduced semi-quasi-Z-source in- verter can be interpreted as a DC-DC converter whose input- output voltage gain may take any value between minus infinity and 1 depe…
Fault-tolerant control under controller-driven sampling using virtual actuator strategy
Esteban N. Osella, Hernan Haimovich, María M. Seron
We present a new output feedback fault tolerant control strategy for continuous-time linear systems. The strategy combines a digital nominal controller under controller-driven (var…
Bounds and Invariant Sets for a Class of Switching Systems with Delayed-state-dependent Perturbations
Hernan Haimovich, Maria M. Seron
We present a novel method to compute componentwise transient bounds, ultimate bounds, and invariant regions for a class of switching continuous-time linear systems with perturbatio…
Sufficient conditions for the genericity of feedback stabilisability of switching systems via Lie-algebraic solvability
Hernan Haimovich, Julio H. Braslavsky
This paper addresses the stabilisation of discrete-time switching linear systems (DTSSs) with control inputs under arbitrary switching, based on the existence of a common quadratic…
Feedback stabilisation of switched systems via iterative approximate eigenvector assignment
Hernan Haimovich, Julio H. Braslavsky
This paper presents and implements an iterative feedback design algorithm for stabilisation of discrete-time switched systems under arbitrary switching regimes. The algorithm seeks…