Baseline in signals is a relatively complicated problem in analysis of signals obtained in various analytical techniques such as chromatography and spectroscopy. In this article there are presented results of tests on...
详细信息
Baseline in signals is a relatively complicated problem in analysis of signals obtained in various analytical techniques such as chromatography and spectroscopy. In this article there are presented results of tests on four algorithms for a baseline estimation in chromatographic signals. Two of them are based on a polynomial fitting in a region of detected peaks. Another two algorithms, i.e. assymetric least squares method and iterative polynomial fitting withthe automatic treshold, estimate the baseline under the whole signal and generally does not require peak detection. the tests of the algorithms are performed on both simulated and experimental signals.
A direct model reference adaptive controller for dissolved oxygen reference trajectory tracking in an aerobic reactor for nutrient removal at the activated sludge wastewater treatment plant is proposed and investigate...
详细信息
A direct model reference adaptive controller for dissolved oxygen reference trajectory tracking in an aerobic reactor for nutrient removal at the activated sludge wastewater treatment plant is proposed and investigated. the reference trajectory is prescribed on-line by an upper control layer of the plant overall control system. the controller design utilises a different time scales in the internal dissolved oxygen dynamic and disturbance inputs. the controller is validated by simulation using real data records.
this paper illustrates the application of point-parametric modeling for model predictive control applications in dynamic networks. the point-parametric modelling methodology is applicable to a variety of large scale c...
详细信息
this paper illustrates the application of point-parametric modeling for model predictive control applications in dynamic networks. the point-parametric modelling methodology is applicable to a variety of large scale complex systems such as drinking water distribution systems, power networks, transportation networks and telecommunication networks. Robust parameter estimation provided by point-parametric modelling technology is addressed. the models developed are suitable for model predictive controller design. A numerical example based on drinking water distribution system is used to illustrate the point-parametric modeling for water quality prediction.
In the paper a method of synthesis of a neural controller which goal is to reduce effects of coupling of the nonlinear multi-input multi-output (MIMO) plant inputs and outputs is presented. the designed neural control...
详细信息
ISBN:
(纸本)9781479987023
In the paper a method of synthesis of a neural controller which goal is to reduce effects of coupling of the nonlinear multi-input multi-output (MIMO) plant inputs and outputs is presented. the designed neural controller contains a set of neural nets that determine values of parameters of linear decoupling controllers calculated for the adopted nonlinear plant model at its operating points. A known dynamic decoupling technique is used to generate training and evaluation data for the synthetized neural nets. the resulting neural (gain-scheduling) controller varies its parameters depending on the current plant operating point.
Modelling of physical components such as spring-damper, mass or screw-nut mechanism gives opportunity to simulate actual behavior of a mechatronic system like a CNC feed drive module. Due to its complexity, it is cruc...
详细信息
ISBN:
(纸本)9781479987023
Modelling of physical components such as spring-damper, mass or screw-nut mechanism gives opportunity to simulate actual behavior of a mechatronic system like a CNC feed drive module. Due to its complexity, it is crucial to conduct proper identification and then estimation process regarding only those parameters, which have the largest impact on the developed model. It is important to create functional physical model, because in practical use only those can be exploited. In this paper, a nonlinear model of a feed drive system is presented in details. Author propose a simplification method of differential equations, which were exploited to develop the model to facilitate estimation process. Results of simulations of developed model are included to confirm the correctness of made assumptions.
In the paper an approach to parametric continuous-time input-output linear dynamic system identification based on a randomized search method is presented. During identification experiment the excitation signal is gene...
详细信息
In the paper an approach to parametric continuous-time input-output linear dynamic system identification based on a randomized search method is presented. During identification experiment the excitation signal is generated directly from D/A converter that is equipped only with zero-order or first-order hold filter - the corresponding low-pass analogue reconstruction filter is not used. In this experiment only samples of the system output signal are gathered. In the corresponding data acquisition system there is no analogue antialiasing filter. Samples of the system output signal are acquired with a deterministic constant or random sampling interval. Properties of the presented approach are illustrated by simulation experiments.
the adaptive control of an overhead crane is developed based on Generalized Predictive Control (GPC) technique. the one-step ahead predictive control scheme is proposed for reducing the residual and transient oscillat...
详细信息
the adaptive control of an overhead crane is developed based on Generalized Predictive Control (GPC) technique. the one-step ahead predictive control scheme is proposed for reducing the residual and transient oscillations of a payload suspended on a rope and transferred by a crane, with respect to the variation of rope length and mass of a payload. the recursive least square (RLS) algorithm is applied to real-time estimate parameters of discrete-time model of a crane dynamic system. Feasibility and applicability of the proposed control technique were confirmed during experiments carried out on the laboratory stand. the results of experiments are presented and compared with performances of the linear controllers-based scheme designed using pole placement method.
this paper describes a common issues in architecture of the variety kind of vision-based sway sensors dedicated for the anti-sway solution as a feedback in close-loop systems. However, in the statement the author'...
详细信息
this paper describes a common issues in architecture of the variety kind of vision-based sway sensors dedicated for the anti-sway solution as a feedback in close-loop systems. However, in the statement the author's attention was focused on the issue related with vision sensor architecture insensitiveness on actual exposure light conditions. the night vision functionality was obtained through use infrared radiation. Author main attention was focused on possibility of use IR as a solution for insufficient light condition and their usefulness in different non-contact vision-based sensor architecture. All obtained results and considerations were conducted on the base vision sway sensor integrated with infrared illuminator assembled on the physical scaled model of the overhead travelling crane with hosting capability of 150 kg.
Non-integer order filters allow much greater flexibility in shaping of frequency responses than classical methods. In this paper authors present the methodology of digital filter design using non-integer order filter ...
详细信息
Non-integer order filters allow much greater flexibility in shaping of frequency responses than classical methods. In this paper authors present the methodology of digital filter design using non-integer order filter as a prototype. Implementation on the embedded testbed was performed to validate the presented method. Experiments with measuring of frequency response show consistency of implementation with desired characteristics. the presented approach is promising and can be successfully used in multiple applications.
this paper deals with analysis of suboptimal dual controller design for linear discrete time stochastic system with uncertain parameters. the design of the dual controller is based on augmentation of the criterion wit...
详细信息
this paper deals with analysis of suboptimal dual controller design for linear discrete time stochastic system with uncertain parameters. the design of the dual controller is based on augmentation of the criterion with suitable measure of the parameters uncertainty in order to explicitly ensure the probing property of the control law. As the uncertainty measure the weighted prediction error of the augmented state is chosen. this approach provides very good quality of the resulting control compared to other explicit dual control method. the drawback of the method can be, however, seen in the lack of methodology for selection of the supplemental weighting matrix. the aim of this article is thus to provide insight into a way how to chose this supplemental weighting matrix with minimum necessary optional parameters.
暂无评论