humanmachine interface design for process control

... Chemistry of side reactions and by-products may also offer opportunities for increasing the inherent safety of a process For example, a process involv-ing a caustic hydrolysis step uses ethylene dichloride ... solution in sulfuric acid) for sulfona-tion reacsulfona-tions If a chemical process requires the concentrated form of a material, it may be feasible to store it as a more dilute form and concentrate ... risk of loss of containment of the hazardous materials being stored The process design engineers must question the need for all intermediate hazardous material storage, and minimize quantities

Ngày tải lên: 13/12/2013, 03:15

... Guidelines for Engineering Design for Process Safety CENTER FOR CHEMICAL PROCESS SAFETY of the AMERICAN INSTITUTE OF CHEMICAL ENGINEERS 345 ... Loss Containment for Different Process Equipment Table 4-2 Basic Considerations for All Fired Equipment Table 4-3 Process Vessels: Special Material Concerns Table 4-4 Checklist for Design and Operation ... were written for engineers on the design team, the process hazard analysis team, and the people who make the basic decisions on plant design Engineering design for process safety should be considered

Ngày tải lên: 13/12/2013, 03:15

... the usability process at the same time as the ect design process? proj-Starting the usability process at the same time as the project design gives you the ability to couch the design of not only ... development team before the design process starts If that’s not possible, get as much customer feedback as possible so you can approach designers with this feedback to better design other products. ... use of consistency and standards in the design of your interface do for its users? It helps ensure that the users can find the information they are looking for because it is always in the same place.

Ngày tải lên: 09/08/2014, 12:21

... Trang 1A user interface is well designed when the program model conforms to the user model That's it Almost all good user interface design comes down to bringing the program ... a lot of things, and it is the designers' responsibility to make these choices for them so that they don't have to It is the height of arrogance for a software designer to inflict a choice like ... that they can make an educated decision.) It has been said that design is the art of making choices When you design a trash can for the corner, you have to make choices between conflicting requirements

Ngày tải lên: 14/08/2014, 00:21

... buttons afford pushing. They look like they stick out and they look like the way to operate them is by clicking on them. Unfortunately, many Web sites these days (unaware of the value of affordances) ... unloved briefcase A metaphor badly chosen is worse than no metaphor at all. Unfortunately, desktop user interface designers feel that they're breaking some kind of law if they don't ... compensate for the bad metaphor by forcing you to read a screen full of instructions whenever you drag files into that dang doohickey. Guess what? Nobody reads instructions. My new Cuisinart food processor

Ngày tải lên: 14/08/2014, 00:21

... creative," but unfortunately, to make a user interface easy to use, you are going to have to channel your creativity into some other area. In most UI decisions, before you design anything from ... time and mine evangelizing it? Unhappily, there is a dark force out there that fights consistency. That force is the natural tendency of designers and programmers to be creative. I hate to be ... will be used to Ctrl+S for save; some of them will be used to Alt+F,S for save, and still others will be used to Alt,F,S (releasing the Alt key). Another group will look for the floppy disk icon

Ngày tải lên: 14/08/2014, 00:21

... about software for a while When you're designing for extremes with software, the three most important "extremes" to remember are: 1 Design for people who can't read 2 Design for people who ... conditions 1 Design for extremes so that your product can be used under extreme conditions, and 2 Design for extremes so that your product is more comfortable to use under normal conditions Designing ... possible This is a principle called design for extremes Don't design something that can only be read in daylight: design it to be read in dim light, too Don't design something that can only be

Ngày tải lên: 14/08/2014, 00:21

... couple of great books like Tog on Software Design (Addison-Wesley, 1995), which is a lot of fun and a great introduction to UI design, and Tog on Interface (Addison-Wesley, 1992) Tog invented ... mouse is controlled with the wrist and most of the fingers This is much like writing, and you probably developed very accurate motor skills for writing in elementary school But a trackball is controlled ... it's much harder to control a trackball to the same degree of accuracy as a mouse Most people find that they can control a mouse to within one or two pixels but can only control a trackball to

Ngày tải lên: 14/08/2014, 00:21

... Obviously, designing software for Pete is quite different from designing software for Patricia, who, in turn, is quite different from Mike, a sixteen-year-old who runs Linux at home, talks on IRC for ... 6Chapter 12: The Process of Designing a Product Overview We've talked about the principles of good design, but principles only give you a way to evaluate and improve an existing design So, how ... predesigned card from library 4 Send card: a Using email b By printing it out For lack of any better way of thinking about the problem, this might lead itself to a typical Macintosh user interface

Ngày tải lên: 14/08/2014, 00:21

... means which The general rule for how to use color was best stated by Web designer Diane Wilson: "Design in black and white Add color for emphasis, when your design is complete." Strange ... red, yellow, manila, and blue I decided to use one color for clients, one color for employees, one color for receipts, and the fourth color for everything else Outrageously sensible, right? No The ... being the best designs always seem to have the fewest buttons While those products were being created, it's pretty obvious that the designers kept thinking of ways to simplify the interface, not

Ngày tải lên: 14/08/2014, 00:21

... to wipe up the tea before it ruins another keyboard Frustrating, huh? Most designers of email-on-the-Web interfaces are aware of this time lag, and they've compensated for it by putting little ... out for when you design for the Web: time delay and the limitations of HTML On the Web, Nobody Knows You're on the Moon One of the biggest restrictions in designing for the Web is another time-travel ... soon as you're developing an application for the Web, as opposed to merely a newspaper or content-based site, things get really clunky HTML was designed for simple interactions "Show me this

Ngày tải lên: 14/08/2014, 00:21

... study to measure the performance of the new interface Also, user preferences were recorded through a post-task questionnaire The users performed more quickly on the interface design with the two ... elicit user preferences on interface design Regarding the correlation between performance and preference, Nielsen and Levy(1994), performed a meta-analysis that analyzed interface studies published ... photos into a repeated format when an export template is present? Q3: On average does the interface design with a photo tray preferred by users? Q4: On average does the interface design with an export

Ngày tải lên: 18/10/2022, 12:37

... FOPI CONTROLLERS FOR CASCADE CONTROL SYSTEM 140 5.3.1 FOPI Controller Design Procedure for General Process Models 140 5.3.2 Design of Secondary Controller 140 5.3.3 Design of Primary Controller ... 9 CHAPTER 1 DESIGN OF ADVANCED PID CONTROLLERS FOR TIME-DELAY PROCESSES 13 1.1 INTRODUCTION 13 1.2 GENERALIZED IMC APPROACH FOR PID CONTROLLER DESIGN 14 1.3 DESIGN OF PID CONTROLLER CASCADED ... NGUYEN LUAN VU PID CONTROLLER DESIGN FOR PROCESS WITH TIME DELAY Trang 2HO CHI MINH CITY UNIVERSITY OF TECHNOLOGY AND EDUCATION TRUONG NGUYEN LUAN VU PID CONTROLLER DESIGN FOR PROCESS WITH

Ngày tải lên: 22/11/2022, 23:04

... response for small exogenous signals (reference commands and disturbances) One way to design controllers for systems with bounded controls, would be to solve anoptimal control problem; for example, ... the reset-windup problem for MIMO systems In practice, the saturations are ignored in the first stage of the control design process, andthen the final controller is designed using ad-hoc modifications ... to design control systems withmultiple saturations for stable open loop plants The idea is to design a linear control systemignoring the saturations and when necessary to modify that linear control

Ngày tải lên: 18/02/2014, 10:20

... problem for this particular robot may be solved by applying the dierent control laws, as outlined above for dierent modes The conditions for exiting the modes have been dened as well For each ... here on is to transform the states into normal form via an appropriate dieo-morphism followed by feedback linearization of the nonlinearities and a standard linear control design We choose the ... 0 ¸ , A3= · A31A32 ¸ , B3= · 0 I ¸ (8) which can be controlled by applying the feedback ν = −K3x3 Note that this controller does perform any control on the wheel orientation In order not to remain

Ngày tải lên: 22/03/2014, 11:20

... of evaluating the performance of transmitters for use in industrial-process control systems Transmitters for use in industrial-process control systems – Part 2: Guidance for inspection and routine ... B), for distributed process control systems 60902 (1987) 60946 (1988) 60954 (1990) 60955 (1989) (continued) Not for Resale Process data highway, Type C (PROWAY C), for distributed process control ... measurement and control equipment in oxygen service Industrial-process measurement and control – Terms and definitions Binary direct voltage signals for process measurement and control systems Process

Ngày tải lên: 04/04/2014, 11:29

... COMMISSION–––––––––––– INDUSTRIAL-PROCESS CONTROL VALVES – Part 6-2: Mounting details for attachment of positioners to control valves – Positioner mounting on rotary actuators FOREWORD 1) The IEC (International ... positionneurs sur les actionneurs rotatifs Industrial-process control valves – Part 6-2: Mounting details for attachment of positioners to control valves – Positioner mounting on rotary actuators ... positionneurs sur les actionneurs rotatifs Industrial-process control valves – Part 6-2: Mounting details for attachment of positioners to control valves – Positioner mounting on rotary actuators

Ngày tải lên: 04/04/2014, 11:29

... software for a while. When you're designing for extremes with software, the three most important "extremes" to remember are: 1. Design for people who can't read. 2. Design for ... we think we're designing for users, but no matter how hard we try, we're designing for who we think the user is, and that means, sadly, that we're designing for ourselves. Until ... you its contents. 35 A user interface is well designed when the program model conforms to the user model. That's it. Almost all good user interface design comes down to bringing the...

Ngày tải lên: 20/03/2014, 15:41

... the measurement for controller FIC whose output regulates the material flow via control valve FCV. This is a simple cascade loop, the form of which is used very often in process control. Reset ... the measurement for controller LIC, which has a manual set point and whose output is the set point for flow controller FIC. Flow sensor/transmitter FT determines the flow in process fluid #2 ... instrumentation for process control 24 that when the output of AIC is still within the dosing range of valve ACV2, the three-way valve ACV3 is forced by AAL to recirculate the process fluid....

Ngày tải lên: 15/05/2014, 11:03