| 1. |
- Andreasson, Martin, et al.
(author)
-
Distributed PI-Control with Applications to Power Systems Frequency Control
- 2014
-
In: American Control Conference (ACC), 2014. - : IEEE conference proceedings. - 9781479932740 ; , s. 3183-3188
-
Conference paper (peer-reviewed)abstract
- This paper considers a distributed PI-controller for networked dynamical systems. Sufficient conditions for when the controller is able to stabilize a general linear system and eliminate static control errors are presented. The proposed controller is applied to frequency control of power transmission systems. Sufficient stability criteria are derived, and it is shown that the controller parameters can always be chosen so that the frequencies in the closed loop converge to nominal operational frequency. We show that the load sharing property of the generators is maintained, i.e., the input power of the generators is proportional to a controller parameter. The controller is evaluated by simulation on the IEEE 30 bus test network, where its effectiveness is demonstrated.
|
|
| 2. |
- Farokhi, Farhad, et al.
(author)
-
Gaussian Cheap Talk Game with Quadratic Cost Functions : When Herding Between Strategic Senders is a Virtue
- 2014
-
In: 2014 AMERICAN CONTROL CONFERENCE (ACC). - 9781479932740
-
Conference paper (peer-reviewed)abstract
- We consider a Gaussian cheap talk game with quadratic cost functions. The cost function of the receiver is equal to the estimation error variance, however, the cost function of each senders contains an extra term which is captured by its private information. Following the cheap talk literature, we model this problem as a game with asymmetric information. We start by the single sender case in which the receiver also has access to a noisy but honest side information in addition to the message transmitted by a strategic sender. We generalize this setup to multiple sender case. For the multiple sender case, we observe that if the senders are not herding (i. e., copying each other policies), the quality of the receiver's estimation degrades rapidly as the number of senders increases.
|
|
| 3. |
- Mickelin, Oscar, et al.
(author)
-
Synthesis of Correct-by-construction Control Protocols for Hybrid Systems Using Partial State Information
- 2014
-
In: 2014 American Control Conference (ACC). - : Institute of Electrical and Electronics Engineers (IEEE). - 9781479932740 ; , s. 2305-2311
-
Conference paper (peer-reviewed)abstract
- This paper considers the problem of synthesizing output-feedback control laws for a class of discrete-time hybrid systems in order for the trajectories of the system to satisfy certain high-level specifications expressed in linear temporal logic. By leveraging ideas from robust interpretation of temporal logic formulas and bounded-error estimation, we identify a subclass of systems for which it is possible to reduce the problem to a state-feedback form. In particular, we use locally superstable hybrid observers to resolve the partial information at the continuous level. This allows us to use recent results in temporal logic planning to synthesize the desired controllers based on two-player perfect-information games. The overall control architecture consists of a hybrid observer, a highlevel switching protocol and a low-level continuous controller. We demonstrate the proposed framework in a case study on designing control protocols for an aircraft air management system.
|
|
| 4. |
- Yang, Tao, et al.
(author)
-
Synchronization in Time-varying Networks of Non-Introspective Agents without Exchange of Controller States
- 2014
-
In: 2014 American Control Conference (ACC). - : Institute of Electrical and Electronics Engineers (IEEE). - 9781479932740 ; , s. 1475-1480
-
Conference paper (peer-reviewed)abstract
- We consider two synchronization problems, namely, state synchronization for networks of identical linear agents, and regulated output synchronization for networks of non-identical linear agents, under a time-varying topology. Agents are assumed to be multiple-input multipleoutput (MIMO), minimum-phase, right invertible and nonintrospective (i. e., they only receive relative output information from their neighboring agents, but lack independent information about their own states or outputs). The time-varying topology is assumed to switch among a finite number of directed graphs containing a directed spanning tree with an arbitrarily a priori given non-vanishing dwell time. Moreover agents are unable to exchange of controller states with their neighboring agents. For solving each problem, we propose a distribute dynamic protocol based on a combination of low-gain and highgain design techniques.
|
|
