automatic gain control circuits theory and design

... sliding-mode control has been designed, in the section 4, we derive robust control scheme of L2 -gain and H2 measure Therefore, a composite control that is comprised of integral sliding-mode control and ... independence of the design functional requirements Minimization of the design information content 140 Recent Advances in Robust Control – Novel Approaches and Design Methods For control system design problems, ... Robust Control – Novel Approaches and Design Methods controller that makes impossible in selecting hardware and leads to premature failure of hardware The values for λ and? ? in Eq (17) and Eq

Ngày tải lên: 19/06/2014, 08:20

... means of the Lyapunov control theory( Khalil, 1996), take the control input as 0 (,) TT u g xtP y BP y =− =− (45) and (,) 0Qxt > and (,) 0 c Qxt> for all n xR∈ and all 0t ≥ is 00 ... feedback gain satisfying the relationship (37) and (49), GΔ is a switching gain of the state, 1 G is a feedback gain of the output feedback integral sliding surface, and 2 G is a switching gain, ... (Seraj and Tarokh, 197 7), (Freeman and Kokotovic, 199 5) and they are based on the choice of a 248 Recent Advances in Robust Control – Novel Approaches and Design

Ngày tải lên: 19/06/2014, 08:20

... 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 ... G&M-code interpreter, 62 gain – derivative, 164 gain – proportional, 163 gain – tuning, 166–168 gain – tuning automatic, 168, 169 gain – tuning Ziegler–Nichols, 167 Giddings and Lewis, 8 GPMC, 29 ... position, 161 control – tracking, 160, 161 control system – PID, 157 controller – derivative, 164 controller – feedback, 161 controller – P, 161 controller – PI, 161 controller – PID, 162 conversational

Ngày tải lên: 11/08/2014, 20:21

... rotating and mathematical calculations for acceleration control and interpolation of lines, circles and parabolae Therefore, the NCK unit has the task of being in charge of the servo and driving control ... logic controller is used to execute sequential control in a machine and an industry In the past, logic control was executed by using hardware that consisted of relays, counters, timers, and circuits ... machined The PLC (Programmable Logic Control) sequentially controls tool change, spindle speed, workpiece change, and in/out signal processing and plays the role of controlling the machine’s behavior

Ngày tải lên: 11/08/2014, 20:21

... of making the servo system stable and in- creasing the position control loop gain, it makes it possible to reduce the machining error and achieve high-speed and high-accuracy machining. Figure ... of G&M- code commands and related addresses such as S, T, and F. The interpreter consists of a parser, an executor, a path generator, a macro executor, and an error handler. The parser consists ... algorithm and Fig 3. 7a and Fig 3. 7b respectively show linear interpolation and circular interpolation In Fig 3. 7a, the variable L is a linear displacement and the variables A and B

Ngày tải lên: 11/08/2014, 20:21

... Linear-type Acc/Dec control, an Exponential-type Acc/Dec control and an S-shaped Acc/Dec control 4.2.2.1 Linear-type Acc/Dec Control The circuit for a Linear-type Acc/Dec control consists of ... programmed path and the path after Acc/Dec control In this section, the machining error for Linear Type Acc/Dec control, S-shape-type Acc/Dec control, and Exponential-type Acc/Dec control are discussed ... the Linear-type Acc/Dec control, the Exponential-type Acc/Dec control, and the Sshape Acc/Dec control However, as CPU performance has improved, the hardwaretype Acc/Dec control has been replaced

Ngày tải lên: 11/08/2014, 20:21

... interpolation and Acc/Dec control for two successive blocks. In Fig. 4.13, Block 1 and Block 2 are successive blocks and Fig. 4.13a and Fig. 4.13b show the interpolation result of Block 1 and Block ... 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 successive blocks. The time–pulse ... block as N1 and the next block as N2 We define that the start point and the end point of N1 are (XS1 ,YS1 , ZS1 ) and (XE1 ,YE1 , ZE1 ), respectively and the start point and the end

Ngày tải lên: 11/08/2014, 20:21

... the P controller, PID controller, fuzzy controller, feed-forward controller, predictive controller, and cross-coupling controller that have been intro- duced to support point-to-point control, ... point-to-point control, tracking control, and contour control. Compared with the P controller, feedback controllers such as the PID controller and the Fuzzy controller decrease the position errors ... single controllers 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 a small integral gain

Ngày tải lên: 11/08/2014, 20:21

... operand and the middle operand and store the result to the right operand DIV 4, 2, Y2.2 When the input signal is ON, divide the value of the left operand by the value of the middle operand ... easy and it is possible to in- crease the efficiency of programming using program modules. [...]... values of the left operand and the middle operand and store the result to the right operand ... the left operand to the left as many bits as given by the right operand ADD 1, 2, X1.7 When the input signal is ON, add the values of the left operand and the middle operand and store the

Ngày tải lên: 11/08/2014, 20:21

... saving, deleting, and changing part programs and PLC programs. 4. Alarm: This displays alarm and error messages from the machine, PLC, and MMC in the alarm window. It manages the history and displays ... for turning, milling, and die and. .. tool interference, overcut, undercut, and aircut, and determining the operation sequence that minimizes the cutting time and tool change 2 A unique ... pro- grams and managing part programs such as saving and deleting. 4. Tool Manager: This program is used for editing and managing the tool informa- tion, such as tool offset, tool life, and tool

Ngày tải lên: 11/08/2014, 20:21

... Sequence Control This module shows the specified operation cycles and enables an operator to modify and delete them while editing the operation cycle It also enables addition of new operation cycles and ... tool up to X = Q2x + k Calculate Q1 using line m and uncut shape between point A and B Calculate Q2 using line m and final shape between point A and B Q1 = Q0 no no m = bx yes All shape? yes Retraction ... requirements, a semaphore mechanism is used for synchronization of processes and controlling critical regions and a message queue and mail box are used for exchanging data between processes Clock Manager:

Ngày tải lên: 11/08/2014, 20:21

... methodologies and regular rules and depends on the system designer’s know-how... determined hardware architecture and operating system 10.3 Design of Soft-NC System 10.3.1 Design of ... a standard bus based on the common bus, being the standard VME bus, and is a master/slave type that consists of a main processor, controlling the whole system, and slave processors and ... processors, and the other is the standard bus type, where a computer unit with a heterogeneous local bus is connected to a standard bus (e.g., Multi-bus and VME bus). 9.10 Hardware and Operating

Ngày tải lên: 11/08/2014, 20:21

... Communication Between NCK and MMI Where the MMI and NCK/PLC modules operate on a single OS and single CPU, communication between MMI and NCK can be designed easily. However, in the case 10.3 Design of Soft-NC ... tasks of NCK, event server and handler for handling the instruction from MMI, and ring buffers for transmitting the data between tasks. Timer handler Event server Event handler Main Ring TimerG ... every specified time. The event handler is used for handling aperiodic events. Because the rough and fine interpolation tasks, Acc/Dec control task, and position control task are performed periodically,

Ngày tải lên: 11/08/2014, 20:21

... monitoring and automatic recovery, and machining status and result feedback. [...]... command 7 Tool radius compensation command 8 Spindle vibration detection command 9 Stroke limit input command 10 ... code command 11 Scaling command 12 Macro call command 13 Tool length compensation command 14 Work coordinate system selection command 15 Cutting mode command 16 Plane selection command 17 Polar ... STEP-CNC: (1) conventional control, (2) new control, and (3) new intelligent control, as shown in Fig. 11.23. Type 1 simply incorporates ISO 14649 in a conventional controller via post- processing.

Ngày tải lên: 11/08/2014, 20:21

... reader with a real and deep understanding of feedback and feedback. .. graduate and postgraduate students who are already familiar with electronic devices and circuits, and who want to ... and deep understanding of feedback and feedback amplifiers Whenever possible and without any loss of generality, a simple and intuitive approach will be used to derive simple and ... theory and feedback amplifiers, for his encouragement and inspiration in the development of this book We would like to thank our families and parents for their endless support and

Ngày tải lên: 24/08/2014, 17:47

... continuous aislación of simplifying has been omitted —if he were necessary Theory and Design of Electrical and Electronic Circuits _________________________________________________________________________________ ... other hand, according to the consideration of a coupling k~1 they are the dispersion inductances and magnetic L 1 ( 1 - k ) ~ 0 nM = L 1 k ~ L 1 Designe Be the effective data and line ... high and low frequencies for a rectangular excitement; that is to say, respectively, to the flanks and roofs of the pulses. For this reason we have the series of following equations of design...

Ngày tải lên: 23/10/2013, 16:15

... Bipolar transistor of junction (TBJ) Theory Design Fast design Unipolar transistor of junction (JFET) Theory Design Operational Amplifier of Voltage (AOV) Theory Design _________________________________________________________________________________ ... T A ) / θ JC Chap. 33 Control of Power (I Part) Chap. 34 Control of Power (II Part) Chap. 35 Introduction to the Theory of the Control Chap. 36 Discreet and Retained signals Chap. ... (TBJ) Theory Polarizing to the bases-emitter diode in direct and collector-bases on inverse, we have the model approximated for continuous. The static gains of current in common emitter and...

Ngày tải lên: 27/10/2013, 16:15

... smoothly curved surface. Many Conformal Array Antenna Theory and Design. By Lars Josefsson and Patrik Persson 1 â 2006 Institute of Electrical and Electronics Engineers, Inc. 1 INTRODUCTION c01.qxd ... theoretical methods for analysis and design, and include explicit formulas where applicable. From a practical point of view, mechanical aspects, beam-forming techniques, and packaging of conformal ... an understanding of the more advanced aspects. The first three chapters present an overview of conformal array principles and applications, including the theory for circular arrays and phase...

Ngày tải lên: 17/03/2014, 13:45

... criteria for hovercraft research, design and tests 10. Design methodology and performance estimation 10.1 Design methodology 10.2 Stability requirements and standards 10.3 Requirements for ... to the distinct differences for both hydrodynamics and structural design between PAR/WIG and ACV/SES craft, the theory and design of PAR/WIG are not discussed further in this ... Diesel engines 16.4 Gas turbines 16.5 General design requirements 16.6 Machinery space layout 16.7 Systems and controls 16.8 Operation and maintenance References Index 487 487 507 515 520 536 564 574 577 577 585 588 596 604 606 607 607 612 618 ...

Ngày tải lên: 22/03/2014, 13:20