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In this paper, we analyse the two identical parallel processor makespan minimization problem with the learning effect, which is modelled by position dependent job/task processing times. We construct an exact pseudopolynomial time algorithm for the considered problem that takes into consideration the learning ability of the processors. Moreover, we analyse the efficiency of the exact algorithm dedicated...
In this paper, the possibility of the application of the Balance-Based Adaptive Control (B-BAC) methodology to control the second order system is discussed. Conventionally, the B-BAController is based on the simplified first order dynamical model of the process, which stands as the significant limitation when the real system is of the higher order. Due to the application of the suggested quasi-cascade...
This paper describes the control aspects and results of a student project called “MonoChair”. The goal was to have students walk through a complete control systems development cycle. The focus in this contribution is put on the design of a stabilizing linear controller, a sensitivity analysis in order to study the impact of parameter variations, and the design and test of an adaptive controller using...
In this paper, we develop a tube based model reference adaptive configuration for a class of nonlinear dynamic systems with actuator failure which not only guarantees closed loop stability, asymptotically exact tracking and robustness to a nonlinear perturbation, and to an external disturbance with unknown bounds, but also diminishes the control cost with respect to some criterion.
A digital controller for satellite medium power DC/DC converters is presented. The power converter composes of a digital compensator implemented in the FPGA, peripherals that interference the digital part with the analog ones and a power stage. The presented controller can be used in two topologies: buck and half-bridge. The mathematical models of the power stages, quantizers and the controller are...
The most common technique for satellite attitude control assumes the use of rotating mechanical parts on-board. Traditionally such a system consists of one to four Reaction Wheels or Control Moment Gyroscopes. Control of the satellite orientation can be done by acceleration of the proper wheel around its axis of rotation. The attitude of the satellite changes according to the conservation of angular...
Presented are results of simulations of B-dot detumbling for satellites with different types of non-symmetrical mass distributions. Results are next compared with the theoretical derivation of the problem made for the case of spherically symmetrical bodies.
This paper addresses a novel approach to Simultaneous Localization and Mapping problem called Unscented HybridSLAM. Analyzing loop closing as one of the most important aspects of SLAM is the major interest of this study. Closing a loop by an autonomous mobile robot can be tricky even in the presence of a correct data association in the process, especially, when the loop is considerably large. The...
In this paper, the main goal of project FREDE (FREon Decay Experiment) have been presented. is to study the disintegration phenomenon of chlorofluorocarbons (CFC's). As radiatively active gases present in the Troposphere and Stratosphere they influence the depletion of the Earth's ozone layer and the increase in the greenhouse effect. This experiment consisting of test samples reservoir exposed to...
In the paper a boundary value problem for a fractional differential equation is considered. A theorem on existence of solutions to the above problem is proved. The main tools in the proof are fractional embeddings theorem and a variational method.
The concepts of regular controllability and selective controllability of the h-difference linear control systems with two fractional orders are introduced. The necessary and sufficient conditions for each of considered types of controllability properties are given.
This paper presents a new concept of modeling of LTI SISO discrete-time fractional-order systems, in which the Laguerre filters are employed to model both 1) the Grünwald-Letnikov fractional difference and 2) a dynamics of the LTI SISO fractional-order system. Such a ‘double-Laguerre’ concept yields original accuracy and computational results at both modeling stages, illustrated with a series of simulation...
This paper deals with the robust control of time-delay non-integer order plants by means of standard noninteger order controllers. Precisely, a method for determining the parameter regions where a PIλDμ controller ensures a given modulus margin (inverse of the H∞ norm of the sensitivity function) is presented. This method, which is conceptually simple and intuitive, extends to the aforementioned general...
The minimum energy control problem for the fractional positive continuous-time linear systems is formulated and solved. Sufficient conditions for the existence of solution to the problem are established. A procedure for solving of the problem is proposed and illustrated by numerical examples.
Galileo will be Europe's own Global Navigation Satellite System (GNSS), which is aiming to provide highly accurate and guaranteed positioning services. Galileo E1 system has a code period of 4ms which is quadruple that of GPS C/A code. In other words, due to the large number of hypotheses in code phase at acquisition stage, a longer searching time or more hardware resource is required. It is difficult...
In this paper, the cascade control of the supply system for the heat exchanger is presented. The aim of the work is the construction of cascade control system, when the output for the inner loop is not measurable. This signal is reconstructed by using the state observer derived from the distributed parameter model of the heat transportation and its implementation is based on the orthogonal collocation...
Designing an algorithm which allows automated seeking of the best operating point of a biological system is a quite complex task. That task is the subject of research for i.a. metabolic engineering which deals with control related issues, in particular with modeling of a biological phenomena kinetics as well as monitoring the unstable states of biomass growth. In the paper a theoretical analysis is...
A method of irregular patterns learning and matching in an example computer vision system designed for eye tracking is presented. The main considered issue is the problem of patterns learning. In the presented solution it requires creation of a set of patterns with some kind of dynamic management. An adaptation of the set of patterns was achieved in that way that a new pattern may be added to the...
This paper studies the linearization and control design for a class of Affine Nonlinear Parameter Varying (ANPV) systems. In advance, a kind of Takagi-Sugeno (T-S) fuzzy modeling procedure with homogeneous consequent part based on the ANPV system is proposed to deal with the nonlinearity and the LPV T-S fuzzy system is obtained. Then, taking the LPV T-S fuzzy system as the control design model, the...
In this paper; three optimization algorithms are used to optimize the fuzzy control parameters of a novel structure two-wheeled robotic vehicle with a movable payload. The vehicle has five degrees of freedom and able to steer on irregular and inclined surfaces. Hybrid spiral dynamic bacterial chemotaxis (HSDBC), spiral dynamic algorithm (SDA) and bacterial forging algorithm (BFA) optimizations are...
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