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 is controlled, 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). 2 2 Basic Control Method for Injection Timing When...
Ngày tải lên: 23/10/2012, 09:09
Bơm ECD-V - P - Outline of Injection Volume Control
... chamber. 1 1 Outline of Injection Volume Control 2 2 Control of Fuel Injection Volume 2-1 Controlling the Injection Volume End of Injection Cam Plate Solenoid Spill Valve Begins to Lift (Start of Injection) ON OFF Cam ... 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 the start 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...
Ngày tải lên: 23/10/2012, 09:09
Tài liệu Application of Computers in Process Control pptx
... 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 K P and T I and T D 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...
Ngày tải lên: 27/02/2014, 03:20
fundamentals of industrial instrumentation and process control
... process- control operation. 1.3 Definitions of the Elements in a Control Loop Figure 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 a Introduction and Review 3 Figure 1.2 Block diagram of a process control ... understanding of instrumentation and process control. Instrumentation and process control involve a wide range of technologies and sciences, and they are used in an unprecedented number of applications. Examples...
Ngày tải lên: 01/04/2014, 10:58
IEC 60534 6 1 industrial process control valves mounting details for attachment of positioners
... Industrial -process control – Safety of analyzer houses. 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 actuators 1 Scope and object This section of IEC...
Ngày tải lên: 04/04/2014, 11:29
IEC 60534 6 2 industrial process control valves mounting details for attachment of positioners
... IEC:2000 5 INDUSTRIAL -PROCESS CONTROL VALVES Part 6-2: Mounting details for attachment of positioners to control valves – Positioner mounting on rotary actuators 1 Scope This part of IEC 60534 is ... INTERNATIONAL ELECTROTECHNICAL COMMISSION INDUSTRIAL -PROCESS CONTROL VALVES – Part 6-2: Mounting details for attachment of positioners to control valves – Positioner mounting on rotary actuators FOREWORD 1) ... 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...
Ngày tải lên: 04/04/2014, 11:29
fundamentals of semiconductor manufacturing and process control
... topics are the subject of Chapters 9 and 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 equipment malfunctions. SUMMARY In ... provide real-time control and analysis of fabrication equipment. These controllers consist of personal computers and the associated 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...
Ngày tải lên: 03/07/2014, 16:09
Essentials of Process Control phần 10 ppt
... this process (with 70 = K, = 1) with a proportional sampled-data controller and a sampling period of 0.5 minutes, the controller gain that gives a phase margin of 45” is K, = 3.43. The controller gain ... 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 gives the following specifications: l Gain margin of ... (Al)? (d) Solve for the roots of the closedloop characteristic equation as functions of the gain K, of the 112 controller. ~mwrts IS: Stability Analysis of Satnpled~Data Systems 533 led 06 n m- i9) 1X- ur 10) ler *e- he he he 1) 2) 3) Using...
Ngày tải lên: 24/07/2014, 07:21
Essentials of Process Control phần 9 ppt
... 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. Consider the kth impulse L(TkT, ... diagram of this system is shown at the bottom of Fig. 14.2. The transfer function of the hold is H(,). The transfer function of the computer controller is D&,. Figure 14.3 shows a digital control ... the continuous output of the plant y(,) is Yk(t) = g(t-kT,)qkT,) (14.55) where yk([) = response of the process to the kth impulse g([) = unit impulse response of the process = 2-l [Gel] Figure...
Ngày tải lên: 24/07/2014, 07:21
Essentials of Process Control phần 8 ppsx
... 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 and the 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 any poles in the right half of ... . Multivariable Processes Perhaps the area of process control that has changed the most drastically in the last two decades is multivariable control. This change was driven by the increasing oc- currence of...
Ngày tải lên: 24/07/2014, 07:21
Essentials of Process Control phần 7 pps
... RESPONSE OF FEEDBACK CONTROLLERS Before we give some examples of the design of feedback controllers in the frequency domain, it would be wise to show what the common P, PI, and PID controllers ... Proportional controller Gain margin. Suppose we want to find the value of feedback controller gain K, that gives a gain margin GM = 2. We must find the value of & that makes the Nyquist plot of G~(s)Gc(,s) ... value of K, when 1 GMcjw, ,Gc(io,, 1 = 1 K2 = value of KC when IGM(iqjGC(iq)/ = 1 K3 = value of KC when [G~~~~,,G~~~~,,~ = 1 The system is closedloop stable for two ranges of feedback controller...
Ngày tải lên: 24/07/2014, 07:21
Essentials of Process Control phần 6 pps
... important property of complex numbers. The magnitude 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 about the control of openloop-unstable systems: The control of these systems becomes more difficult as the order of the system is increased and as the magnitudes of the first-order lags ... structure is an alternative way of looking at controller design. The model of the process is clearly indicated in the block diagram. The tuning of the GIMC(~) controller reduces to selecting...
Ngày tải lên: 24/07/2014, 07:21
Essentials of Process Control phần 5 pps
... the values of the controller parameters. We will show that any real process can be made closedloop unstable by making the gain of the feedback controller large enough. There are some processes ... yields 7.4 TRANSFER FUNCTIONS Our primary use of Laplace transformations in process control involves representing the 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 signal changes the position of a control valve, which changes the flow rate of the...
Ngày tải lên: 24/07/2014, 07:21
Báo cáo lâm nghiệp: "Online control of wood peeling process: Acoustical and vibratory measurements of lathe checks frequency" ppt
Ngày tải lên: 07/08/2014, 16:21
Research on customer service satisfaction of Husky injection molding company
Ngày tải lên: 24/11/2014, 01:39
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