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A two voltage level electronic device is interesting because the clock frequency and the supply voltage level could be reduced in order to decrease the energy consumption. However, these two quantities have to be controlled respecting certain rules, and decreasing them leads to a reduced computational speed. In this paper a control architecture is proposed to deal with this power performance tradeoff...
This paper addresses the problem of normalized anisotropic optimal controller order reduction by means of anisotropic balanced truncation. This controller is the solution to the problem of normalized anisotropy-based stochastic Hinfin optimization. An example of application to flight control in a windshear is given.
In this paper we address the problem of indoor tracking using received signal strength (RSS) as a position-dependent data measurement. This type of measurements is very appealing because they can be easily obtained with a variety of wireless technologies which are relatively inexpensive. The extraction of accurate location information from RSS in indoor scenarios is not an easy task, though. Since...
Due to the strong interrelations between traffic situations at different locations of a road network the traffic control actions applied for solving a local traffic problem can create another traffic congestion at a different location in the network. This can result the average travel time on the network level, even after the application of the control actions, to be the same or worse. Therefore,...
This paper considers the stability and constrained stabilization of dynamic systems described by second or higher order vector differential equations. Such systems arise in various applications including electromechanical systems, aerodynamics, structural analysis, robotics and vibration systems, in which the stabilization and improved performance play a crucial role. Due to the fact that the coefficient...
This paper proposes a novel high precision planar electromagnetic-actuated positioning stage. The movable part of the stage is suspended by a monolithic parallel flexure mechanism, which motion comes from the deformation of the structure itself. A linear electromagnetic actuator which consists of a near-uniform magnetic field and four coils is designed and implementation to provide the propelling...
The problems of identification and correspondent statistical methods are considered. Features of the averaging on the set and along realization are illustrated. The rocks and realities of inertialess and dynamic object identification are shown. There are presented the analysis, basic statements and results of modeling for identification procedure and estimations accuracy.
Future hybrid electric vehicles (HEVs) may use path-dependent operating policies to improve fuel economy. In our previous work, we developed a dynamic programming (DP) algorithm for prescribing the battery state of charge (SoC) set-point, which in combination with a novel approach of route decomposition, has been shown to reduce fuel consumption over selected routes. In this paper, we propose and...
The paper describes the mechanism for involving students from multilingual, geographically separated institutions in a coordinated educational experience and presents the observations and evaluation of outcomes related to the collaborative project. The project was realized as a part of ILERT (international learning environment for real-time software intensive control system) EU/US activity sponsored...
A method for Hinfin proportional-integral (PI) observer design for linear time-delay systems is proposed in this paper. The design method involves attenuating of the disturbance to a pre-specified level while estimating the states of the delay system. The PI observer design requires solving certain algebraic Riccati equation. Although the PI observer for time delay system is used for disturbance attenuation...
This study proposes a novel graphical method (LIZIVD) as an effective solution to link areas on a raster map to a database containing zone characteristics data. The method involves Inverse Voronoi approach which constructs polygonal mesh structure to define each region individually by using Voronoi points. This approach, when combined with Geographic Information Systems (GIS) particularly using satellite...
This paper is a study of a genetic adaptive scheme design for L2-gain state feedback controllers. It is known that the design of the initial gain producer of the L2-gain state feedback controller (LC) is a difficult problem. The derivative-free optimization, the genetic algorithm, is utilized to resolve the high initial gain problem of LC for a class of nonlinear systems. It is a novel approach for...
Modern commercial aircraft engine maintenance includes a form of threshold testing on monitored engine parameters. In most cases the thresholds used to monitor the respective parameters are determined by the engine manufacture and do not take into account an aircraft's engines actual usage. In addition, thresholds set by the engine manufacture are set to provide a warning for the most severe cases...
Cooperative behavior in decentralized mobile agents requires communication among them. However, such communication can also have negative consequences for a variety of reasons, and the benefits of communication can vary over the course of the agent team's task or mission. In this paper, we compare the benefits of communication over time for a team of mobile agents performing a general search-and-engage...
We propose a six degree-of-freedom multi-body approach for modeling and simulation of biologically-inspired (or Biomimetic) autonomous underwater vehicles (BAUVs), i.e., artificial fish. The proposed approach is based on considering the BAUV as comprised of multiple rigid bodies interlinked through joints; the external force and torque on each rigid body in the BAUV is expressed using quasi-steady...
In this contribution, a Hfrinfin-controller is devised for the tracking of a reference trajectory in a SISO-system. To this end, a Hfrinfin suboptimal set-point control concept for bilinear systems is adapted and generalized for tracking purposes resorting to the overall error dynamics of the respective time-varying system. The presented controller incorporates integral action on the angular shaft...
This paper proposes a new plant/controller design integration framework that seeks the best pair of the plant and the controller for the best possible closed-loop performance in Hscr2 control. The framework is further equipped with a symbolic-numeric hybrid optimization approach to effectively achieve the optimum. In the suggested approach, a recent algebraic tool called the Sum of Roots is firstly...
In this paper, a phenomenological model of clutch torque transmissibility is proposed. This model applies to clutch engagement during vehicle start-up in both manual and automated-manual configurations. The proposed model can be identified through on board measurements available in most production vehicles. The model is based on the identification of a nonlinear characteristic that relates the transmissibility...
In this paper we develop advanced control methods for routing individual vehicles which ensure automatic transportation of bags in a baggage handling system of an airport. In particular we consider distributed model predictive control and a distributed heuristic control approach. The baggage handling system performs efficiently if all the bags are transported to the corresponding end points within...
A neural networks based approach for the identification of the rate-dependent hysteresis in the piezoelectric actuators is proposed. In this method, a hysteresis operator dependent on the change-rate of the input is proposed to extract the change-tendency and rate-dependency of the dynamic hysteresis. With the introduction of the rate-dependent hysteresis operator into the input space, an expanded...
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