检索结果-内蒙古大学图书馆

Targeted Processor Architectures for High-Performance controller Implementation

IFAC Proceedings Volumes 1997年第3期30卷 43-48页

作者： Mark Gooch Simon Jones Roger Goodall Department of Electronic & Electrical Engineering Loughborough University Loughborough Leicestershire. LE11 3TU. United Kingdom

The requirements for hardware implementation of complex linear time-invariant controllers are addressed. This includes the basic formulation of the equations and their associated numerical properties. Hardware architectures which are directly targeted to these formulations are designed, and their performance compared with a conventional digital signal processor for a relatively high-end controller task.

关键词： control algorithms Architectures Arithmetic and logic units control applications Hardware

来源：评论

学校读者我要写书评

暂无评论

MARCO: A European Project to Develop Tools for Conflict Detection and Resolution in Railway and Metro Application

引用

IFAC Proceedings Volumes 1997年第8期30卷 1133-1138页

作者： Freddy De Vilder Signalling Manager at NMBS (Belgian Railways) Dept 130.32 Galileïlaan 5 B 1210 Brussels Belgium

The main objective of the Multilevel Advanced Railways Conflict resolution and Operation control (MARCO) project is to find suitable algorithms to optimise train traffic when normal schedules are somehow disturbed. These algorithms are tested on several modelled rail and metro networks, undergoing the most frequently occurred disturbances of everyday life. A demonstrator verifies their applicability under the given circumstances.

关键词： Modelling Simulators Detection algorithms control algorithms Traffic control Train control

来源：评论

学校读者我要写书评

暂无评论

A Process Environment Toolbox for Matlab/Simulink

引用

IFAC Proceedings Volumes 1997年第12期30卷 53-58页

作者： A. Hofer H. Pristauz Institut für Regelungstechnik Technische Universität Graz Krenngasse 37 A-80l0 Graz Austria

The Process Environment Toolbox for MATLAB/SIMULINK has been created to make laboratory experiments with real time control algorithms very easy. The main goal was to augment MATLAB/SIMULINK in such a way that makes it possible to perform control system design and simulations and control experiments with real word plants within the same program. The application of the toolbox to the stabilization of an inverted pendulum by a special type of fuzzy controller is presented.

关键词： control algorithms fuzzy control computer controlled systems computer aided control system design stabilizing controllers

来源：评论

学校读者我要写书评

暂无评论

Modelling Ocular Accommodation Incorporating a Fuzzy Logic controller

引用

IFAC Proceedings Volumes 1997年第2期30卷 73-77页

作者： A.S. Eadie P. Carlin L.S. Gray Department of Physical Sciences Glasgow Caledonian University Glasgow G4 OBA Department of Vision Sciences Glasgow Caledonian University Glasgow G4 OBA

A control system model of ocular accommodation has been developed to include the effects of target proximity. The model includes the novel feature of a fuzzy logic controller to provide a simple yet realistic approach in dealing with non-optical stimuli such as proximity. The results of model simulations under open loop conditions compare favouraoly with previous published experimental results. In addition, closed loop model simulations are in agreement with experimental results.

关键词： Biomedical control control algorithms Fuzzy control Vision

来源：评论

学校读者我要写书评

暂无评论

Derivation of the Glover-Doyle algorithms for general H-infinity control problems

引用

AUTOMATICA 1996年第4期32卷 581-589页

作者： Hong, JL Teng, CC NATL CHIAO TUNG UNIV INST CONTROL ENGNHSINCHUTAIWAN

We show that the Glover-Doyle algorithm can be formulated simply by using the (J,J')-lossless factorization method and chain scattering matrix description. This algorithm was first stated by Glover and Doyle in 1988. Because the corresponding diagonal block of the (J,J')lossless matrix in the general 4-block H-infinity control problem of the Glover-Doyle algorithm is not square, a new type of chain scattering matrix description is developed. With this description in hand, we obtain two types of state-space solution, which are similar to each other. Thus a similarity transformation between these solutions in the 4-block H-infinity control problem can also be obtained. The main idea of the solution is illustrated by means of block diagrams.

关键词： H-infinity control control algorithms coprime factorization

来源：评论

学校读者我要写书评

暂无评论

Accommodation of springback error in channel forming using active binder force control: Numerical simulations and experiments

引用

JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME 1996年第3期118卷 426-435页

作者： Sunseri, M Cao, J Karafillis, AP Boyce, MC Department of Mechanical Engineering Massachusetts Institute of Technology Cambridge MA 02139-4307

Springback in a forming process is due to the elastic deformation of the part during unloading. This manufacturing defect can be accounted for through proper tooling design or through proper design and control of the magnitude and history of restraining force. Using finite element analysis of the process: (1) the effects of restraining force on the springback phenomena when stamping channels from aluminum sheet are investigated;(2) a strategy to control the binder force during the forming operation in order to reduce springback and simultaneously avoid tearing failure is described;and (3) a binder force control strategy which provides robustness in the presence of process parameter uncertainty is implemented. The process history and controller design using finite element analyses is then experimentally verified : excellent agreement between simulation and experiments is obtained. A binder force history, which leads to a significant reduction in the amount of springback incurred by the formed part without reaching critical stretching conditions, was proposed. Although an optimal forming history was found, in order to ensure that part shape error remained minimized even in the event of variations in processing parameters such as friction, a closed-loop control algorithm was developed whereby the binder force is altered during the process in order to provide a robust, repeatable stretching history. Experiments were performed using a double-action servo-controlled process and were found to produce the desired results demonstrating both the accuracy of the numerical simulation and the success of the proposed active-binding force control method to obtain net shape.

关键词： Errors Metal stamping Simulation control algorithms Uncertainty Force control Shapes Binders (Materials) Deformation Servomechanisms Tooling Robustness Computer simulation Friction Design Failure control equipment Aluminum Manufacturing Finite element analysis

来源：评论

学校读者我要写书评

暂无评论

Reduced algorithm set control

引用

control ENGINEERING PRACTICE 1996年第2期4卷 195-205页

作者： McCulloch, JG Process Systems Superintendent BP Chemicals Grangemouth Scotland UK

The computer industry has been revolutionised by the advent of the RISC processor, which employs a very simple instruction set. This paper proposes a similar approach to the algorithm set of distributed control systems called 'Reduced Algorithm Set control' or RASC. Current algorithm sets are complex to understand, difficult to develop and full of hidden problems, This increases the difficulties in implementing complex control strategies. RASC is a simple but robust standard algorithm set providing all the facilities required to configure even the most complex of control schemes. This paper defines the RASC algorithm set and describes some implementation examples.

关键词： control algorithms continuous control distributed computer control systems PID control process control robust control software reliability standards

来源：评论

学校读者我要写书评

暂无评论

A mathematical model of discrete manufacturing process control

引用

control ENGINEERING PRACTICE 1996年第9期4卷 1249-1260页

作者： Mikulczynski, T Samsonowicz, Z Institute of Mechanical Engineering and Automation of the Technical University of Wroclaw Wroclaw Poland

A synthesis, at an arbitrary level of sequential discrete manufacturing process control systems has been provided in this paper. New methods have been presented: the MTS and GRAFPOL syntheses of sequential control systems. The MTS (net transformation method) is a method of classical synthesis of sequential control systems. It allows for the design of classical contact-relay sequential systems. GRAFPOL is a method of system synthesis. It allows for the modelling of discrete processes and programming of PLCs (programmable logic controllers). It has been shown that a single universal algorithm of a discrete manufacturing process exists, represented by the operation net, or its equivalent the GRAFPOL-MS net (of Mikulczynski and Samsonowicz). The algorithm of the process is the basis for determining a universal control algorithm which represents an action net or its equivalent, the GRAFPOL-TMS net. The control algorithm may be used at an arbitrary level of the synthesis of sequential control systems.

关键词： manufacturing processes process control control algorithms programmable logic controllers programming languages

来源：评论

学校读者我要写书评

暂无评论

Smooth stabilization of nonlinear control systems

引用

AUTOMATICA 1996年第11期32卷 1609-1611页

作者： Schwartz, CA Yan, AG Department of Electrical Engineering University of Florida 405 CSE Bldg. 42 Gainesville FL 32611-6130 United States

This paper provides the framework for a general approach for constructing smooth stabilizing feedback for smooth nonlinear systems when it is possible to construct such a feedback. algorithms for determining the local smooth asymptotic stabilizability of two specific classes of smooth nonlinear control systems are developed. These two classes of systems are identified with systems whose linearizations possess either one zero eigenvalue or a pair of purely imaginary eigenvalues. The local stabilizability of any critical nonlinear system in either of these classes may be tested once the system's linearization is block diagonalized with respect to the critical and stable eigenvalues. Copyright (C) 1996 Elsevier Science Ltd.

关键词： nonlinear control systems control algorithms stabilization

来源：评论

学校读者我要写书评

暂无评论

Damage-mitigating control of a reusable rocket engine .1. Life prediction of the main thrust chamber wall

引用

JOURNAL OF DYNAMIC SYSTEMS MEASUREMENT AND control-TRANSACTIONS OF THE ASME 1996年第3期118卷 401-408页

作者： Dai, XW Ray, A Mechanical Engineering Department The Pennsylvania State University University Park PA 16802

The goal of damage-mitigating control in reusable rocket engines is to achieve high performance without overstraining the mechanical structures;and the major benefit is an increase in structural durability with no significant loss of performance. This sequence of papers in two parts investigates the feasibility of damage mitigating control of a reusable rocket engine similar to the Space Shuttle Main Engine (SSME). The challenge here is to characterize the thermo-mechanical behavior of the structural materials for damage prediction in conjunction with dynamic performance analysis of the thermo-fluid process in the rocket engine, and then utilize this information in a mathematically and computationally tractable form for synthesizing decision and control algorithms. This paper is the first part and investigates the damage phenomena in the coolant channel ligament of the main thrust chamber of a rocket engine that are characterized by progressive bulging-out and incremental thinning lending to eventual failure by tensile rupture. A creep damage model is analytically derived based on the theories of sandwich beam and viscoplasticity. The objective of this model is to generate a closed-form solution of the wall thin-out in real time where the ligament geometry is continuously updated to account for the resulting deformation. The creep damage model has been examined for both single-cycle and multi-cycle stress-strain behavior, and the results are in agreement with those obtained from the finite element analyses and experimental observation. Due to ifs computational efficiency, this damage/life prediction model is suitable for on-line applications of decision and control, and also permits parametric studies for off-line synthesis of damage mitigating control systems. The second part, which is a companion paper develops an optimal policy for damage mitigating control of the rocket engine.

关键词： control algorithms Rocket engines Viscoplasticity control systems Deformation Geometry Mechanical structures Space vehicles Rupture Durability Thermomechanics Thermofluids Creep Damage Stress Cycles Coolants Thrust Failure Engines Finite element analysis

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：