This contribution is focused on computation of stability regions for Proportional-Integral-Derivative (PID) controllers. The area of possible placement of the controller parameters which guarantee feedback stabilizati...
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ISBN:
(纸本)9789604742769
This contribution is focused on computation of stability regions for Proportional-Integral-Derivative (PID) controllers. The area of possible placement of the controller parameters which guarantee feedback stabilization of a controlled plant is obtained via plotting the stability boundary locus. This approach is subsequently combined with the desired model method which is used for final controller design. The applicability of the technique is demonstrated on an example where a third order electronic laboratory model is successfully controlled.
This paper deals with design of multichannel measurement system for strain gauge sensor evaluation in laboratory of mechanical engineering. Device is based on 8-bit Freescale microcontroller MC9S08GB60 which is due it...
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ISBN:
(纸本)9781618040046
This paper deals with design of multichannel measurement system for strain gauge sensor evaluation in laboratory of mechanical engineering. Device is based on 8-bit Freescale microcontroller MC9S08GB60 which is due its properties intended for general purpose applications. Device implements modular hardware design enabling easy functionality expansion in future demands. This is fulfilled by dividing of the whole measurement system to main board and input / output eventually measurement modules. Main board of the device contains master microcontroller, USB communication interface, power supplies and interface for expansion cards. Modules for strain gauge sensor evaluation consist of amplifier with selectable gain followed by 4th order Bessel low-pass filter eliminating ripple in analog signal and finally 12-bit analog-to-digital converter connected via serial peripheral interface (SPI) and other control signals with main board. Communication with supervision system is provided by USB interface which is recognized as standard serial port in host operating system.
The main aim of this contribution is to introduce the fundamentals of the Fractional Order Calculus (FOC) and outline its possible application to analysis and synthesis of control systems. The basic theoretical concep...
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ISBN:
(纸本)9781618040046
The main aim of this contribution is to introduce the fundamentals of the Fractional Order Calculus (FOC) and outline its possible application to analysis and synthesis of control systems. The basic theoretical concepts of FOC are followed by techniques for potential fractional order systems description and stability investigation. Moreover, the paper offers the overview of the existing fractional order controllers and highlights the benefits of the fractional approach in comparison with the classical integer one.
This contribution is focused on comparison of two basic approaches to uncertainty modelling and corresponding robust stability analyses for a system with uncertain time-delay. A paper bleaching process, described both...
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ISBN:
(纸本)9781618040046
This contribution is focused on comparison of two basic approaches to uncertainty modelling and corresponding robust stability analyses for a system with uncertain time-delay. A paper bleaching process, described both as a system with parametric uncertainty and in the form of unstructured multiplicative uncertainty model, is considered as a testing plant. The robust stability of closed control loop with selected controller and appropriate uncertain model of controlled plant is verified and obtained results are compared.
This paper is focused on reference tracking and disturbance rejection for linear time-invariant time delay systems. The contribution is motivated by the fact that the task of reference tracking and disturbance rejecti...
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This paper is focused on reference tracking and disturbance rejection for linear time-invariant time delay systems. The contribution is motivated by the fact that the task of reference tracking and disturbance rejection for non-stepwise those external inputs in the feedback loop is often ignored in the literature. The presented approach is based on algebraic operations in a special ring RMS and on the divisibility condition in the ring. The general idea for a feedback loop with two controllers is introduced. The methodology is clarified and verified by a simulation example in the Matlab/Simulink environment.
Abstract Physiological control mechanisms are receiving an increasing amount of attention due to their primary role in homeostasis, while systems theory is becoming an indispensable tool for understanding the dynamic ...
Abstract Physiological control mechanisms are receiving an increasing amount of attention due to their primary role in homeostasis, while systems theory is becoming an indispensable tool for understanding the dynamic behaviors that emerge. In this context, a topic that has been intensively studied is the nervous control of the cardiovascular system on short term. This paper tries to develop a common framework for future efforts in modeling the nervous control of the cardiovascular system in orthostatic stress, through a systemic analyze of the roles and interactions of the regulatory mechanisms identified in the literature.
The main idea of this project is to simulate the thermal construction responses in dependence on changing boundary conditions. In order to predict environmental temperature precisely a model of one room has been devel...
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The main idea of this project is to simulate the thermal construction responses in dependence on changing boundary conditions. In order to predict environmental temperature precisely a model of one room has been developed and implemented in COMSOL Multiphysics. A finite element model was developed in 3D coordinates in order to achieve illustration of an air and an energy movement and to simulate the transient process in the walls. Notwithstanding, this model was not accurate enough for application in building conditions. Main goal of this paper is in updating current model to get results with sufficient accuracy. Temperature course of the model is analyzed and compared to the experimentally measured temperature data.
Abstract In this paper an anti-slip predictive controller is designed and implemented in order to control the rear wheels of a V-PRA (Variable Powered Rear Axle) vehicle. The control algorithm is EPSAC, a Model based ...
Abstract In this paper an anti-slip predictive controller is designed and implemented in order to control the rear wheels of a V-PRA (Variable Powered Rear Axle) vehicle. The control algorithm is EPSAC, a Model based Predictive control (MPC) strategy. It uses explicitly a model of the system for the prediction of the future system output, in order to calculate the optimal control input which will bring the system to a required setpoint. The main goals of this predictive controller were setpoint trajectory following, disturbance rejection and maintain overall the stability of the V-PRA vehicle. Although the process is non-linear, being influenced by several parameters, linear discrete-time ARX models could be obtained based on system linearization around an operating point. An initial SISO controller was developed and tested, based on a Simulink model of the process. The control performances were tested successfully in presence of all kind of disturbances, denoting a robust controller.
The paper deals with the infrared radiation source EK-8520, ability to measure using a thermocouple TP334 and temperature by thermal imager for calculating spectral range. It prepares the theoretical and practical bas...
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The paper deals with the infrared radiation source EK-8520, ability to measure using a thermocouple TP334 and temperature by thermal imager for calculating spectral range. It prepares the theoretical and practical bases for testing infrared radiation detectors for security technologies.
Time delay systems (TDS), called hereditary or anisochronic as well, can be frequently found in many engineering problems and they constitute a widespread family of industrial plants. Modelling, identification, stabil...
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Time delay systems (TDS), called hereditary or anisochronic as well, can be frequently found in many engineering problems and they constitute a widespread family of industrial plants. Modelling, identification, stability analysis, stabilization, control, etc. of TDS are challenging and fascinating tasks in modern systems and control theory as well as in academic and industrial applications. One of their possible linear representations in the form of the Laplace transform yields the transfer function expressed as a fraction of quasipolynomials, instead of polynomials, with delay (exponential) terms in denominators. In this contribution, detailed root location analysis of a characteristic retarded quasipolynomial of degree one is presented, which gives rise to the spectrum of a retarded TDS. The presented analysis represents also a powerful tool for controller tuning in pole-placement control algorithms for delayed systems. A simulation example clarifies the results obtained vie proven propositions, lemmas and theorems.
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