process control of injection molding

Bơm ECD-V - P - Outline of Injection Timing Control

... result, the position of the roller relative to the cam plate is changed, which varies the timing of the start of injection. The control of injection timing when the timing control valve is ON ... to change the injection timing, the amount of fuel pressure added to the timer piston of the injection pump iscontrolled, and the position of the piston is varied. The movement of the timer piston ... explained below. The control when the timing control valve is switched between ON/OFF is explained in section 3-2 Timing Control Valve (TCV).22Basic Control Method for Injection Timing When...

Bơm ECD-V - P - Outline of Injection Volume Control

Danh mục: Cơ khí - Chế tạo máy

... chamber.11Outline of Injection Volume Control 22 Control of Fuel Injection Volume2-1 Controlling the Injection VolumeEnd of Injection Cam PlateSolenoidSpill ValveBegins to Lift(Start of Injection) ONOFFCam ... valve of the injection pump to control the injection volume. Fuel injection starts the moment the cam plate forces the plunger to begin lifting. In other words, the timing of thestart of injection ... injection is determined by the position of the cam plate. Fuel is increased or decreased by controlling the timing of the end of injection. The end of injection is the moment when the solenoid...

Analysis and control of nonlinear process systems

Danh mục: Điện - Điện tử

Tài liệu Application of Computers in Process Control pptx

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... 1 of 7 ECET- 462 Application of Computers in Process Control Purdue University, Calumet [LABORATORY 8] Tuning of a PID controller using Ziegler-Nichols Method Page 6 of ... use of PID controller using LabVIEW. 2) Finding the values of KP and TI and TD using Ziegler Nichols Method for Tuning the PID controller Software required: LabVIEW Background: PID controllers ... several PID controller modules. We shall use the Academic PID controller. The difference between different PID controllers is shown below: Page 2 of 7 Tuning of a PID controller...

fundamentals of industrial instrumentation and process control

Danh mục: Hóa học - Dầu khí

... process- control operation.1.3 Deﬁnitions of the Elements in a Control LoopFigure 1.4 breaks down the individual elements of the blocks in a process- control loop. The measuring element consists of ... The control element has an actuator, a power control circuit, and its own power supply. The controller has a processor with aIntroduction and Review 3Figure 1.2 Block diagram of a process control ... understanding of instrumentation and process control. Instrumentation and process control involve a wide range of technologies andsciences, and they are used in an unprecedented number of applications.Examples...

IEC 60534 6 1 industrial process control valves mounting details for attachment of positioners

Danh mục: Điện - Điện tử

... Industrial -process control – Safety of analyzerhouses.61297 (1995) Industrial -process control systems – Classification of adaptive controllers for the purpose of evaluation.61298-1 (1995) Process ... (1995).60770 (1984) Methods of evaluating the performance of transmitters for use in industrial -process control systems.60770-2 (1989) Transmitters for use in industrial -process control systems – Part ... INDUSTRIAL -PROCESS CONTROL VALVES Part 6: Mounting details for attachment of positioners to control valves –Section 1: Positioner mounting on linear actuators1 Scope and objectThis section of IEC...

IEC 60534 6 2 industrial process control valves mounting details for attachment of positioners

Danh mục: Điện - Điện tử

... IEC:2000 5 INDUSTRIAL -PROCESS CONTROL VALVES Part 6-2: Mounting details for attachment of positionersto control valves – Positioner mounting on rotary actuators1 ScopeThis part of IEC 60534 is ... INTERNATIONAL ELECTROTECHNICAL COMMISSIONINDUSTRIAL -PROCESS CONTROL VALVES –Part 6-2: Mounting details for attachment of positionersto control valves – Positioner mounting on rotary actuatorsFOREWORD1) ... to be in conformity with one of its standards.6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. The IEC shall...

fundamentals of semiconductor manufacturing and process control

Danh mục: Kinh tế vĩ mô

... topics are the subject of Chapters 9and 10. These topics include run-by-run control of unit processes and supervisory control of process sequences, as well as the diagnosis of process and equipmentmalfunctions.SUMMARYIn ... provide real-time control and analysis of fabrication equipment. These controllers consist of personal computers and theassociated control software dedicated to each individual piece of equipment. ... populated board for quality control Following attachment of the ICs, the output of the process is the fully intercon-nected and populated circuit board.The output of the process is a populated circuit...

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Essentials of Process Control phần 10 ppt

Danh mục: Kỹ năng nói tiếng Anh

... this process (with70 = K, = 1) with a proportional sampled-data controller and a sampling period of 0.5minutes, the controller gain that gives a phase margin of 45” is K, = 3.43. The controllergain ... PI controller.Use r/ values of 0.5 and 2 minutes.15.3.Make Nyquist plots for the process of Problem 15.1 and find the value of gain that givesthe following specifications:l Gain margin of ... (Al)?(d)Solve for the roots of the closedloop characteristic equation as functions of thegain K, of the 112 controller. ~mwrts IS: Stability Analysis of Satnpled~Data Systems533led06nm-i9)1X-ur10)ler*e-hehehe1)2)3)Using...

Essentials of Process Control phần 9 ppt

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... is defined below.A sequence of impulses z.$,comes out of the impulse sampler on the input of the process. Each of these impulses produces a response from the .process. Considerthe kth impulseL(TkT, ... diagram of this system isshown at the bottom of Fig. 14.2. The transfer function of the hold is H(,). The transferfunction of the computer controller is D&,.Figure 14.3 shows a digital control ... the continuous output of the plant y(,) isYk(t) = g(t-kT,)qkT,)(14.55)where yk([) = response of the process to the kth impulseg([) = unit impulse response of the process = 2-l [Gel]Figure...

Essentials of Process Control phần 8 ppsx

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... grounded in the essence of chemical process control will be capable of understanding the features of model predictive control should the need arise.The basic idea of MPC is to use a process model (either ... of zeros andthe number of poles of Fts,in the right half of the s plane.If the process is openloop stable, none of the transfer functions in &ts, has anypoles in the right half of ... .Multivariable ProcessesPerhaps the area of process control that has changed the most drastically in the lasttwo decades is multivariable control. This change was driven by the increasing oc-currence of...

Essentials of Process Control phần 7 pps

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... RESPONSE OF FEEDBACK CONTROLLERSBefore we give some examples of the design of feedback controllers in the frequencydomain, it would be wise to show what the common P, PI, and PID controllers ... Proportional controllerGain margin. Suppose we want to find the value of feedback controller gainK, that gives a gain margin GM = 2. We must find the value of & that makes theNyquist plot of G~(s)Gc(,s) ... value of K, when 1 GMcjw, ,Gc(io,, 1 = 1K2 = value of KC when IGM(iqjGC(iq)/ = 1K3 = value of KC when [G~~~~,,G~~~~,,~ = 1The system is closedloop stable for two ranges of feedback controller...

Essentials of Process Control phần 6 pps

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... important property of complex numbers. Themagnitude of the product of two complex numbers is the product of their magnitudes.The argument of the product of two complex numbers is the sum of their arguments. ... important point aboutthe control of openloop-unstable systems: The control of these systems becomesmore difficult as the order of the system is increased and as the magnitudes of thefirst-order lags ... structure is an alternative way of looking at controller design. Themodel of the process is clearly indicated in the block diagram. The tuning of theGIMC(~) controller reduces to selecting...

Essentials of Process Control phần 5 pps

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... the values of the controller parameters. We will show thatany real process can be made closedloop unstable by making the gain of the feedbackcontroller large enough. There are some processes ... yields7.4TRANSFER FUNCTIONSOur primary use of Laplace transformations in process control involves representingthe dynamics of the process in terms of “transfer functions.” These are output-input~~~relationships ... feedback controller transfer func-tion Gets), and sends out a controller output signal CO. The controller output signalchanges the position of a control valve, which changes the flow rate of the...