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- Håvard Fjær Grip, Tao Yang, Ali Saberi, Anton A. Stoorvogel
- Automatica
- 2012

In this paper we consider the output synchronization problem for heterogeneous networks of linear agents. The network’s communication infrastructure provides each agent with a linear combination of… (More)

- Lars Imsland, Tor Arne Johansen, Thor I. Fossen, Håvard Fjær Grip, Jens Kalkkuhl, Avshalom Suissa
- Automatica
- 2006

Nonlinear observers for estimation of lateral and longitudinal velocity of automotive vehicles are proposed. The observers are based on a sensor suite that is standard in many new cars, consisting of… (More)

- Håvard Fjær Grip, Tor Arne Johansen, Lars Imsland, Glenn-Ole Kaasa
- Automatica
- 2010

We consider a class of systems influenced by perturbations that are nonlinearly parameterized by unknown constant parameters, and develop a method for estimating the unknown parameters. The method… (More)

- Xu Wang, Ali Saberi, Anton A. Stoorvogel, Håvard Fjær Grip, Tao Yang
- 2012 IEEE 51st IEEE Conference on Decision and…
- 2012

This paper studies the consensus among identical agents that are at most critically unstable and coupled through networks with uniform constant communication delay. An achievable upper bound of delay… (More)

- Håvard Fjær Grip, Lars Imsland, Tor Arne Johansen, Thor I. Fossen, Jens Kalkkuhl, Avshalom Suissa
- Automatica
- 2008

- Håvard Fjær Grip, Thor I. Fossen, Tor Arne Johansen, Ali Saberi
- Automatica
- 2015

This paper deals with the construction of nonlinear observers for navigation purposes. We first present a globally exponentially stable observer for attitude and gyro bias, based on gyro measurements… (More)

- Lars Imsland, Tor Arne Johansen, Håvard Fjær Grip, Thor I. Fossen
- Int. J. Control
- 2007

Unknown input observers (UIOs) are observers that have stable error dynamics that are independent of unknown inputs. This paper studies such observers for nonlinear systems, and shows that the error… (More)

- Håvard Fjær Grip, Ali Saberi, Xu Wang
- IEEE Transactions on Automatic Control
- 2010

We consider linear time-invariant multiple-input multiple-output systems that are controllable and observable, where each output component is saturated. We demonstrate by constructive design that… (More)

- Håvard Fjær Grip, Thor I. Fossero, Tor Arne Johansen, Ali Saberi
- 2012 American Control Conference (ACC)
- 2012

We present an observer for estimating position, velocity, attitude, and gyro bias, by using inertial measurements of accelerations and angular velocities, magnetometer measurements, and… (More)

- Håvard Fjær Grip, Ali Saberi, Tor Arne Johansen
- Systems & Control Letters
- 2011

We consider systems that can be described by a linear part with a nonlinear perturbation, where the perturbation is parameterized by a vector of unknown, constant parameters. Under a set of technical… (More)