We define the notion of Dynamic Discrete-Event Systems, a class of time-varying systems, and present a simple approach to optimal control of such systems. More specifically, we use limited-lookahead online control and...
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We define the notion of Dynamic Discrete-Event Systems, a class of time-varying systems, and present a simple approach to optimal control of such systems. More specifically, we use limited-lookahead online control and an algorithm which tries to maximize the benefit of the executed sequences of events, while at the same time ensuring that unwanted (illegal) sequences are avoided. We use examples to illustrate the different types of problems that can arise if such control is used, for example, overspecialization and failure to take advantage of available resources. These issues are used to formulate a list of desirable properties for a new algorithm that optimizes the control of dynamic systems.
The paper deals with brief description of three modifications of the way of control of hot-water piping heat output at simultaneous operation of qualitative and also quantitative parts of control. The separate modific...
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The paper deals with brief description of three modifications of the way of control of hot-water piping heat output at simultaneous operation of qualitative and also quantitative parts of control. The separate modifications are as follows: 1. Qualitative – quantitative way of control of hot-water piping heat output using prediction of the course of daily heat supply diagram in district heating systems. 2. Adaptation of qualitative – quantitative way of heat supply control for the case of using part of the piping for heat accumulation. 3. Algorithm of qualitative – quantitative way of control of hot-water piping output with using hot-water boilers as heat sources. Modifications of the way of control are different due to possibility of implementation into specific conditions in separate localities of district heating systems.
The leather industry uses a by wastes of meat industry, and, as such, significantly reduces the environmental impact. It is therefore evident that term, waste“ is relative. It can be argued that if the “waste” gene...
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The leather industry uses a by wastes of meat industry, and, as such, significantly reduces the environmental impact. It is therefore evident that term, waste“ is relative. It can be argued that if the “waste” generated in one industry sector can successful be utilised as a raw material in another industry sector for the manufacture of goods, we need to rethink our philosophy on the use of resources. This paper describes a proposed comprehensive computer control and monitoring system for a recycling technological process of both liquid and solid wastes from the tanning industry. The chromium tannery wastes are potential dangerous for the environment. As an experimental laboratory model were built in the Department of Automatic control Faculty of Technology Tomas Bata University in Zlín an apparatus fully equipped with sensors and actuators. Monitoring and control system was tested on the real equipment.
This work presents a soccer robot for the FIRA MiroSot league based on a DSP design instead of the more common microcontroller design to provide more flexibility in the use of the robot. The robot's mechanical and...
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This work presents a soccer robot for the FIRA MiroSot league based on a DSP design instead of the more common microcontroller design to provide more flexibility in the use of the robot. The robot's mechanical and electronical design will be presented along with an overview on its control methods and software. Two additions to the robot – an on-board camera module and a 2.4 GHz radio module –will also be reviewed.
In order to suppress the Repeatable Run-Out (RRO) of a following control system in HDDs is quite effective to increase the disk density. Many approaches were presented in former literatures, e.g. by applying adaptive ...
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In order to suppress the Repeatable Run-Out (RRO) of a following control system in HDDs is quite effective to increase the disk density. Many approaches were presented in former literatures, e.g. by applying adaptive filters and/or repetitive controllers. These approaches, however, require the complicated design in structures and parameters, preventing the controller design from saving time and labor. This paper presents a novel algorithm to suppress the effects of RRO on following control performance. In the proposed algorithm, the FFT (Fast Fourier Transform) is applied to identify a frequency characteristic of RRO. Based on the identified characteristics, an inverse system in frequency domain can be achieved to reject the effect of RRO. Numerical simulations and experimental results show the effectiveness of the proposed control.
Practically, some intermediary realizations are used in order to simulate, numerically, dynamic systems. One of the most popular is the state-space realization. It reveals to be very useful to study the impact of Fini...
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Practically, some intermediary realizations are used in order to simulate, numerically, dynamic systems. One of the most popular is the state-space realization. It reveals to be very useful to study the impact of Finite Word Length implementation, especially in the case of embedded controller. Numerous works concerned the design of the “best” realization concerning parameterisation, numerical noise minimisation or saving computation. This paper points out however that a standard state-space realization is too basic to take into account some interesting realizations. On the contrary, it highlights that implicit state-space realizations allows a more direct link with the macroscopic computations to be performed. It is necessary to describe some popular algorithms simulating LTI systems. Moreover, such a representation has the important property to unify different ways of research considering differently the possibilities offered by using the shift, δ or γ operators.
The paper addresses development of control algorithms for two different autonomousaerial delivery systems. The first one is based on a solid circular parachute and the second one - on a ram-air parafoil. While the fir...
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The paper addresses development of control algorithms for two different autonomousaerial delivery systems. The first one is based on a solid circular parachute and the second one - on a ram-air parafoil. While the first, low-glide-ratio system is crucially dependent on the accuracy of the wind prediction, the second, high-glide-ratiosystem is capable of effectively rejecting moderate winds. This fundamental difference dictates different control laws described in this paper. The paper applies optimal control analysis to both systems and proceeds with thedevelopment of the practical guidance and control algorithms. Simulation results forboth systems as well as flight test results for the parachute-based system are included.
This paper discusses the nature of interactions between high-level intelligent agents and low-level control algorithms. control algorithms offer the promise of simplifying a system's dynamic behaviour as perceived...
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This paper discusses the nature of interactions between high-level intelligent agents and low-level control algorithms. control algorithms offer the promise of simplifying a system's dynamic behaviour as perceived by the controlling agent, thus considerably simplifying the agent's tasks of planning and execution. However, the coupled dynamics of such a hybrid system can be difficult to predict and may even lead to undesirable behaviour. This paper demonstrates that it is possible for a rational intelligent agent commanding a system with a well-designed control algorithm to cause catastrophic behaviours, and presents a framework for analysing the coupled dynamics of hybrid systems. A technique for alleviating these behaviours is suggested, using newly developed control algorithms applicable to a wide variety of autonomous systems of current interest. These controllers can also themselves be made adaptive, allowing for the possibility of 'distributed' or 'cooperative' learning and reasoning. As the control algorithm learns models of the physical system, this information can be passed back to the controlling agent, allowing it to alter its goals and strategies accordingly. A new architecture for hybrid systems encapsulating these ideas is then suggested.
We examine the ethical and social issues surrounding the design of human-computer interfaces that are designed for control of highly autonomous weapons systems. With the improvements of global positioning satellite co...
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We examine the ethical and social issues surrounding the design of human-computer interfaces that are designed for control of highly autonomous weapons systems. With the improvements of global positioning satellite communications and control algorithms, it is currently possible to launch weapons. These systems are highly autonomous in that they do not need constant human supervision and manual control for operation and indeed, only require human intervention when a change in a goal state is required. In the swarm concept, human decision makers are removed even further from the decision-making loop.
control of a coupled drives apparatus laboratory model as a two inputs - two outputs system is presented. One control algorithm based on polynomial theory and pole placement is proposed. A decoupling precompensator is...
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ISBN:
(纸本)0889863717
control of a coupled drives apparatus laboratory model as a two inputs - two outputs system is presented. One control algorithm based on polynomial theory and pole placement is proposed. A decoupling precompensator is used to suppress interactions between control loops. The algorithm in adaptive version is then used for control of the model. The results of the real-time experiments are also given.
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