hygienic design of processing systems and auxiliary systems

... example of a CNC to which the concept of Soft-NC is applied The CNC shown in Fig 1.19 is designed based on the concept of modularization, standardization, and distributed processing and uses ... Direction of the CNC System 29 For the NC system design, the modularization of tasks and the system design such as the allocation of priority for each task, the selection of scheduling method and the ... synchronization and communication mechanism among tasks are required In this book, the architecture and design of the CNC system and the architecture and functions of the NCK, the PLC, and the MMI...

Ngày tải lên: 08/09/2013, 20:50

... application of MATLAB to the analysis and design of control systems Presentations are limited to linear, time-invariant continuous time systems Chapters and include a great number of worked examples and ... types of control systems: (a) Man-made control systems (b) Natural, including biological-control systems (c) Control systems whose components are both man-made and natural ANALYSIS AND DESIGN OF ... magnitude of the sensitivity-function is made arbitrarily small 1.8 CONTROL SYSTEM ANALYSIS AND DESIGN OBJECTIVES Control systems engineering consists of analysis and design of control systems...

Ngày tải lên: 01/01/2014, 18:43

... LPNI Systems 114 Design of Reference Tracking Controllers for LPNI Systems 134 Design of Disturbance Rejection Controllers for LPNI Systems 167 Performance Recovery in LPNI Systems 204 Proofs ... turns out, Na and Ns are functions of the standard deviations, σu and σy , of u and y, respectively, that is, ˆ ˆ ˆ ˆ Na = Na (σu ) and Ns = Ns (σy ) Therefore, we refer to the system of Figure 0.2 ... from the point of view of design; both wide and narrow sense design problems are considered (problems P2 and P3) Chapter addresses the issues of performance recovery (problems P4 and P5) Finally,...

Ngày tải lên: 23/03/2014, 15:20

... hardware and software tasks; (ii) techniques and overhead analysis for migration of hardware and software tasks between nodes in a network; and finally (iii) morphing of the implementation style of ... feature of adaptive and fault tolerant systems The basic factors of innovation of a ReCoNet stem from (i) dynamic rerouting, (ii) hardware and software task migration, (iii) hardware/software ... size of load to each of its neighbors The quality of such an algorithm is measured in terms of the number of iterations that are required in order to achieve a balanced state and in terms of amount...

Ngày tải lên: 22/06/2014, 22:20

... example of a CNC to which the concept of Soft-NC is applied The CNC shown in Fig 1.19 is designed based on the concept of modularization, standardization, and distributed processing and uses ... Direction of the CNC System 29 For the NC system design, the modularization of tasks and the system design such as the allocation of priority for each task, the selection of scheduling method and the ... synchronization and communication mechanism among tasks are required In this book, the architecture and design of the CNC system and the architecture and functions of the NCK, the PLC, and the MMI...

Ngày tải lên: 27/06/2014, 06:20

Ngày tải lên: 04/07/2014, 16:50

... ADCBI-type NCK – architecture, 211 address, 237 aging, 328 AGV, AIM, 404 and – AND, 260 and not – ANDN, 261 and stack – ANDS, 266 application layer, 275 approximation errors, 77 APT, 281 architecture ... control, 164 derivative controller, 164 derivative gain, 164 design of PC-NC and open CNC, 353 design of system kernel, 361 development of the machining cycle, 305 device manager, 323 digital differential ... function, 56 soft bus, 30, 416 soft PLC, 247–249 soft real-time system, 319 Soft-NC, 30, 248, 353, 355, 357, 359, 362–364, 366–369, 372–377, 388, 392, 393, 416 software model, 242 softwired NC,...

Ngày tải lên: 11/08/2014, 20:21

... composed of two parts with a total of 11 chapters: Part I is composed of Chapters 1–6 on the principle and design of CNC, and Part II is composed of an open-architectural soft CNC system Specifically, ... Principles and NCK Design of CNC Systems Introduction to NC Systems 1.1 Introduction 1.2 The History of NC and NC ... 10.3 Design of Soft-NC System 10.3.1 Design of Task Module 10.3.2 Design of the System Kernel ...

Ngày tải lên: 11/08/2014, 20:21

... example of a CNC to which the concept of Soft-NC is applied The CNC shown in Fig 1.19 is designed based on the concept of modularization, standardization, and distributed processing and uses ... synchronization and communication mechanism among tasks are required In this book, the architecture and design of the CNC system and the architecture and functions of the NCK, the PLC, and the MMI ... the functions of the modules into cyclic tasks and non-cyclic tasks and using real-time OS The design of the PLC and the MMI unit, real-time OS, operation of application modules, and system programming...

Ngày tải lên: 11/08/2014, 20:21

... system is the software module of the NCK unit that interprets the part program consisting of G&Mcode commands and related addresses such as S, T, and F The interpreter consists of a parser, an ... software are used in modern CNC systems The concept of the software interpolator originates from that of the hardware interpolator and the hardware interpolator is limited to control simple systems ... Q2=Q2 L Pulse to Y Fig 3.7 Software DDA interpolator ment of the X- and Y-axes, and the initial value of variables Q1 and Q2 is zero In Fig 3.7b, the initial values of variables are the same as...

Ngày tải lên: 11/08/2014, 20:21

... number of the pulses from rough interpolation and Acc/Dec control at time i tipo is the iteration time of rough interpolation and N is the ratio of the iteration time of rough interpolation and ... degree of the B-spline basis function, Pi denotes control point i, and wi stands for the ‘weight’ of Pi 3.5.2 NURBS Geometric Characteristics The characteristic of NURBS curves depends on that of ... space and if u is ui and multiplicity of knot ui is k, P(u) can be differentiated as many as p − k times • The movement of control point Pi or the change of weight wi affects the portion of the...

Ngày tải lên: 11/08/2014, 20:21

... result of X-axis interpolation and Acc/Dec control for two successive blocks In Fig 4.13, Block and Block are successive blocks and Fig 4.13a and Fig 4.13b show the interpolation result of Block and ... of various control modules that provide many functions Practically, however, the majority of CNC systems include control systems that consist of the interpolation module of the middle layer and ... Fig 4.18b, the lower of the two blocks’ speeds is defined as the speed at the corner For example, if the commanded feedrates of Block N1 and N2 are F1 and F2 , respectively, and F1 is higher than...

Ngày tải lên: 11/08/2014, 20:21

... mention execution algorithms and implementation by pseudo-code In this chapter, only the design of NCK will be described and the overall design of the CNC system where the PLC and MMI units are included ... pos command(n)=10.0-real(n)*0.02; /Generation of position/ /command for simulation/ pos command (n+100)=8.0+real(n)*0.02; end / Position control loop / begin (n=1, 300) command= pos command (n); ... gains by the estimation of the dead time and time constant from Eqs 5.19 and 5.20, an ultimate gain and frequency are necessary to use the equation of the response curve of the Ziegler–Nichols...

Ngày tải lên: 11/08/2014, 20:21

... values of the left operand and the middle operand and store the result to the right operand SUB 3, 1, Y3.1 When the input signal is ON, subtract the values of the left operand and the middle operand ... configuration and software of a Soft PLC, please read other references about Soft-NC and Open CNC systems 7.7 PLC Configuration Elements In this section, the configuration and execution structure of a PLC ... property of DOS or Windows OS can be overcome by various methods and the method of designing a soft PLC system will be described together with design of Soft-NC in the later in this textbook In Soft-NC,...

Ngày tải lên: 11/08/2014, 20:21

... consists of alphanumerical input buttons and hot keys for executing the functions of CNC 8.1.3 Area for MPG Handling This area consists of the MPG (Manual Pulse Generator), the MPG handle ON/OFF switch ... used on the shop floor and has a good effect on productivity In this text book, the design and development of Shopfloor Oriented Programming systems embedded in CNC systems and used on the shopfloor ... where cutting conditions and the characteristics of the CNC system are specified, and 4) the Auxiliary part where auxiliary data such as tool size, workpiece number, and so on is specified • EXAPT...

Ngày tải lên: 11/08/2014, 20:21

... kind of system call and usable hardware) The architecture of hardware (the number of CPUs and the way of connecting between modules) 315 316 CNC Architecture Design The architecture of the software ... reliability of the running tasks by preparing for occurrence of problems and removing them Real-time systems can be divided into two types: hard real-time systems and soft real-time systems In ... OS and hardware architecture for designing CNC systems will be described The system programming method under real-time OS, the basic structure of real-time OS, and the concept of resource handling...

Ngày tải lên: 11/08/2014, 20:21

... also called Soft-NC, and the functions of NC and PLC are designed as functional modules or software tasks in the multi -processing environment of a real-time OS Soft-NC has the aim of realizing ... mentioned, the software design of a CNC system must be done together with the design of the hardware and the operating system As the design of the software architecture belongs to the stage of developing ... kernel design, and communication among modules will be described in the case of Soft-NC design 10.2.1 CNC System Modeling To design the software architecture, system modeling of the processes and...

Ngày tải lên: 11/08/2014, 20:21

... only of stand-alone units but also FA systems Therefore, besides the development of special-purpose 392 10 Design of PC-NC and Open CNC systems by modularization of system components and standardization ... communication task of MMI is designed as application software based on Windows 95 Therefore, on the side of MMI, the communication task can be designed easily by 376 10 Design of PC-NC and Open CNC ... composed of main function, timer handlers for the tasks of NCK, event server and handler for handling the instruction from MMI, and ring buffers for transmitting the data between tasks Timer handler...

Ngày tải lên: 11/08/2014, 20:21

... goal of using STEP-NC and other standards to develop an open database of all the information necessary to design and manufacture a part While NIST understands the value of standards-based data exchange, ... machining systems are envisioned to know and communicate their capabilities and condition to monitor and optimize their operations autonomously, to assess the quality of their output and to learn and ... cancel command is called Table A.3 G-code grouping Group Command One-shot command Feed command Constant surface speed command Absolute/Incremental programming command Mirror image command Feed...

Ngày tải lên: 11/08/2014, 20:21

... effects of the uncertainties on the performance of these systems, and to analyze the stability and design controllers accordingly Many research efforts have been made to analyze and design systems ... analysis and control of systems with random parametric uncertainties The subsequent contents of this thesis are organized as follows: Chapters and study the stability analysis of systems with random ... of Systems with A Single Uncertain Parameter Chapter Stability Analysis of Systems with A Single Uncertain Parameter In this thesis, we study the stability analysis and controller design of systems...

Ngày tải lên: 10/09/2015, 09:25