design of control systems

... nature of the system’s components.Broadly speaking, there are three basic types of control systems: (a) Man-made control systems (b) Natural, including biological-control systems (c) Control systems ... variable of the plant under the control of the control system Controller The elements of an open-loop control system can usually be divided into two parts: controller and the controlled process The controller ... course in control systems for engineer-ing students of all disciplines.Chapter 1 presents a brief introduction to control systems The fundamental strategy ofcontrolling physical variables in systems

Ngày tải lên: 01/01/2014, 18:43

... 161 control – D, 164 control – derivative, 164 control – feedback, 179 control – feedforward, 171, 173–178, 182 control – PI, 164 control – point-to-point, 160, 161 control – position, 161 control ... deceleration, 107–114 derivative 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 ... digital control”, ASME Transactions, Journal of Dynamic Systems, Measurement and Control, Vol 109, pp 65–68, 1987 151 Toshiba, “Numerical Control Unit”, US patent 5994863, 1999 152 University of Utah

Ngày tải lên: 11/08/2014, 20:21

... interpreter consists of soft-a psoft-arser, soft-an executor, soft-a psoft-ath genersoft-ator, soft-a msoft-acro executor, soft-and soft-an error hsoft-andler Theparser consists of a lexical analyzer, ... implemented using software are used in modernCNC systems The concept of the software interpolator originates from that of thehardware interpolator and the hardware interpolator is limited to control simple ... the quality of the machined surface poor.Also in this case, because a lot of program blocks are required, the size of the partprogram is large Because the size of the internal memory of CNC system

Ngày tải lên: 11/08/2014, 20:21

... movement of control point P i or the change of weight w iaffects the portion of the curve where the parameter u ∈ [ui,ui +p+1] • By adjusting the weight, the control point, and the knot vector of a ... used in today’s CNC systems In modern CNC systems, a soft-ware DDA interpolator is used, where the algorithm of the hardware DDA interpo-lator is implemented in software A software interpolation ... is the number of the pulses from rough interpolation and Acc/Dec control at time i t ipo is the it-eration time of rough interpolation and N is the ratio of the itit-eration time of rough interpolation

Ngày tải lên: 11/08/2014, 20:21

... result of Acc/Dec control for Block 1 Pulse Time (d) The result of Acc/Dec control for Block 2 Pulse Acc/Dec control Acc/Dec control Fig 4.13 X-axis interpolation and Acc/Dec control control for two ... trolling axes Setting the block control mode is one of the G-code functions Forexample, in the G-code system of the FANUC controller, there are two kinds of pathcontrol mode; exact stop mode (G61) ... by Eq 4.75 Trang 15The speed profile of the acceleration interval of Block N1 can be obtained byEq 4.73 and Eq 4.55 The speed profile of the deceleration interval of Block N2can be obtained by

Ngày tải lên: 11/08/2014, 20:21

... as a combination of singlecontrollers such as a PI controller, PD controller as well as PID controller Actually,for position control of machine tool axes, a P controller or a PI controller having ... derivative of position overtime is sensitive to noise.Above, the effect of different types of gain on the PID controller is explained.Therefore, in practice, a variety of combinations of P control, I control, ... PID controller can be utilized as a P controller for only proportional (P)control actions, an I controller for only integral (I) control actions, and a D controllerfor only derivative (D) control

Ngày tải lên: 11/08/2014, 20:21

... property of DOS or Windows OS can be overcome by various methods and themethod of designing a soft PLC system will be described together with design ofSoft-NC in the later in this textbook In Soft-NC, ... from Soft NC, Soft NC andSoft PLC can be regarded as the same system Soft PLC which is made by a userinterface and the PLC kernel based on the IEC1131-3 can be regarded as partialsystems of Soft-NC ... processor and one piece of software that controls single operations A single configuration is formed, even in the case of large-sized PLC systems with multiple processors, a variety of sources (multiple

Ngày tải lên: 11/08/2014, 20:21

... and compatibility of PLC systems, hardware-based PLCsystems have come to be replaced by software-based PLC, the so-called Soft PLCsystem A Soft PLC system is regarded as a software-oriented PLC ... milling function can machine off-a milling feoff-ature on the end of cylinder Figure 8.6b shows how off-a turning moff-achinecan generate a groove on the surface of a cylinder To carry out the ... of the key applications in MMI In general, the machine tool operator spends a lot of time learning how to generate a part program So, from the MMI designer’s point of view, the MMI should bedesigned

Ngày tải lên: 11/08/2014, 20:21

... traditional examples of resource protection, airplane ticket reservation systems and bank accounting systems are often given Before a flight, the seats of an airplane are located in the memory of the ticket ... that the status of processes can be changed to a variety of states According to the process activity, a process in a real-time OS can be classified as being in one of six kinds of state Current ... execution of a task during execution In this case, since stopping a task can only be done by an interrupt, the design of the OS kernel is simple However, because the OS kernel cannot control the

Ngày tải lên: 11/08/2014, 20:21

... characteristic of a task, the architecture of the software should be de-signed In addition to designing the architecture of the software, the architecture ofhardware should be designed in parallel ... can be expected that a lot of time will be needed for perfect standardization 9.10 Hardware and Operating Systems In the case of the design of real-time systems, one of the key considerations ... functions of NC and PLC are designed as functional modules orsoftware tasks in the multi-processing environment of a real-time OS Soft-NC hasthe aim of realizing the PC-NC architecture using software

Ngày tải lên: 11/08/2014, 20:21

... application software On the side of NCK, the commu-nication task is designed as application software based on real-time OS The com-munication task of MMI is designed as application software based ... between the Acc/Dec control task and the fine interpolationtask is a good example of the use of the ring buffer Whenever the Acc/Dec controltask is carried out once, the Acc/Dec profile for one block ... instead ofthe ring buffer makes the execution speed of the task predictable, the usage of sharedmemory has a positive influence on the reliability of the implemented NCK module.After the position control

Ngày tải lên: 11/08/2014, 20:21

... shape of the raw workpiece, material of the workpiece, chuckingposition of the workpiece and so on In this example, the material of the workpiece is steel named ‘ST-50’ and the initial shape of ... OAC/ Soft-NCTechEtc CNCTechnology Depending on how STEP-NC is implemented on the CNC, there are three types of STEP-CNC: (1) conventional control, (2) new control, and (3) new intelligentcontrol, ... pling of a CAM System and CNC Controller This is depicted in Fig 11.26 in theform of a CAM client on the CNC Since the main requirement is to assure theusability of existing machine tools and controllers,

Ngày tải lên: 11/08/2014, 20:21

... Decoupling Control in Subsystem 2 119 4.5.3 Stability of Subsystem 3 120 Trang 64.5.4 Regulation of Subsystem 1 1224.5.5 Overall Controller Design 122 4.6 Controller Design with ... Representation of System and Reference Variable 124 4.6.2 Controller Design with Integral Action: Stochastic Control 126 4.6.3 Controller Design with Integral Action: Deterministic Control ... performance of these systems, and to analyze the stability and design controllersaccordingly Many research efforts have been made to analyze and design systems with ric uncertainties, from robust control

Ngày tải lên: 10/09/2015, 09:25

... 1ANALYSIS AND DESIGN OF FLEXIBLE SYSTEMSTO MANAGE DEMAND UNCERTAINTY AND SUPPLY DISRUPTIONS GEOFFREY BRYAN ANG CHUA NATIONAL UNIVERSITY OF SINGAPORE 2009 Trang 2ANALYSIS AND DESIGN OF FLEXIBLE SYSTEMSTO ... DISRUPTIONS GEOFFREY BRYAN ANG CHUA (M.Sci., University of the Philippines) A THESIS SUBMITTEDFOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF DECISION SCIENCESNATIONAL UNIVERSITY OF SINGAPORE ... concept of graphexpanders to provide a rigorous proof of the existence of a sparse partiallyflexible structure (not necessarily chaining) for a symmetrical system thataccrues most of the benefits of

Ngày tải lên: 14/09/2015, 08:39

... AISI 304 and EN 1.4301 are often regarded as identical, there may be small differences in the carbon content Trang 83 Design of piping systems The design of piping systems must ensure a good ... the design phase! Figure 1 Example of more elbows than necessary being used, which leads to increased costs During replacement of existing piping systems, the existing piping systems are often ... Limitations 5 1.2 Definition and use of guidelines 5 2 Choice of steel quality 5 2.1 Recommended material selection for the food industry 6 3 Design of piping systems 8 3.1 Drainability or not?

Ngày tải lên: 11/11/2016, 17:21

... Trang 1SPECIFICATION AND DESIGNOF EMBEDDED SYSTEMS by Daniel D Gajski Frank Vahid Sanjiv Narayan Jie Gong University of California at Irvine Department of Computer Science Irvine, CA 92715-3425 ... Behavioral synthesis Logic synthesis Software compilation Physical design Test generation Manufacturing Trang 6Introduction Design models and architectures System-design languages An example Translation ... 31Heterogeneous: Control/dataow graphdisableenable , enable / disable A1 A3/ enable A1,enable A2 Data flow graphs Control flow graph C Trang 32Control/dataow graphsMerits: correct the inability of DFG

Ngày tải lên: 19/06/2018, 14:33

... perspective of the ADRIATIC project for the design of reconfigurable systems-on-chip, as perceived in the course of theresearch during 2001 - 2004 The project provided: (a) a high-level hardware/software ... Level Design Methodology Design Flow for Reconfigurable Systems-on-Chip 87 KONSTANTINOSMASSELOS AND NIKOLAOSS VOROS 87 Trang 6OCAPI-XL Based Approach 133Part C Design Cases Prototyping of a HIPERLAN/2 ... hardware/software co-design and co-verification methodology and tools forreconfigurable systems-on-chip, supplemented with back-end design tools for the implementation of the reconfigurable logic blocks of the

Ngày tải lên: 20/03/2019, 14:44

... perspective of the ADRIATIC project for the design of reconfigurable systems-on-chip, as perceived in the course of theresearch during 2001 - 2004 The project provided: (a) a high-level hardware/software ... Level Design Methodology Design Flow for Reconfigurable Systems-on-Chip 87 KONSTANTINOSMASSELOS AND NIKOLAOSS VOROS 87 Trang 6OCAPI-XL Based Approach 133Part C Design Cases Prototyping of a HIPERLAN/2 ... hardware/software co-design and co-verification methodology and tools forreconfigurable systems-on-chip, supplemented with back-end design tools for the implementation of the reconfigurable logic blocks of the

Ngày tải lên: 19/04/2019, 14:02

... NotesFundamentals of Control Systems Instructor: Assoc Prof Dr Huynh Thai Hoang Department of Automatic Control Faculty of Electrical & Electronics Engineering Ho Chi Minh City University of Technology ... 2Chapter 9DESIGN OF DISCRETE CONTROL SYSTEMS Trang 3 IntroductionContent  Introduction  Discrete lead – lag compensator and PID controller  Design discrete systems in the Z domain  Design discrete ... Design discrete systems in the Z domain  Controllability and observability of discrete systems  Design state feedback controller using pole placement  Design state estimator  Design state estimator

Ngày tải lên: 10/02/2020, 01:18

... Linearization of LPNI Systems 20 3 Analysis of Reference Tracking in LPNI Systems 66 4 Analysis of Disturbance Rejection in LPNI Systems 114 5 Design of Reference Tracking Controllers for LPNI Systems ... Linearization of LPNI Systems 20 2.1 Stochastic Linearization of Open Loop Systems 20 2.1.1 Stochastic Linearization of Isolated Nonlinearities 20 2.1.2 Stochastic Linearization of Direct Paths of LPNI Systems ... arguments lead to a class of systems that we refer to as Linear Plant/Nonlinear Instrumentation (LPNI). The controllers in feedback systems are often designed to be linear. The main design techniques...

Ngày tải lên: 23/03/2014, 15:20