Esten Ingar Grotli

  • Citations Per Year
Learn More
In this paper two different observers for a nonlinear compressor model have been developed and compared: A nonlinear observer based on a circle criterion design and an Extended Kalman Filter. Both of these observers were implemented together with linear control strategies in order to (surge-)control the nonlinear Greitzer compressor model. The newly(More)
In this paper we present a hybrid observer for rigid body angular velocity estimation, which equilibrium point in closed loop with the system is asymptotically stable in the large<sup>1</sup>, i.e. we prove that the error states are stable and asymptotically converging towards the origin for all initial rotations and angular velocities. Stability results(More)
In this paper, we solve the in the large control problem of rigid bodies with quaternion measurements only, by applying any hybrid certainty equivalence tracking controller satisfying a set of certain assumptions, along with a in the large hybrid nonlinear velocity observer, by using theory of cascades. Strictly speaking, we show that the origin of the(More)
Team Members & Advisors—Eric Andres, Alexandre Bayen, Alex Brooks, Christopher Brooks, Iain Brown, Eric Chang, Wuyang Chen, Charlie Chiau, Jaechoon Chon, Hoam Chung, Gamini Dissayanake, Miguel Domingo, Bertrand Douillard, Vincent Duindam, Hugh Durrant-Whyte, J. Mikael Eklund, Ken Elkabany, Danish Farooq, Filip Furmanek, Mark Godwin, Michael Greenbaum, Jose(More)
  • 1