| |
| |
|
Home Improvement Information |
|
|
|
Getting the Power to Control
One of the advantages of using machines to control processes for you is that you can harness tremendous amounts of power and energy which humans do not possess. By a flick of a switch, huge sliding flood gates can move to allow large quantities of water to flow out of a dam. With just a slight twist on a handle, supertankers weighing hundreds of thousands of tons are able to turn because of the corresponding rotation of huge rudders. Similarly, processes operating valves can be remotely operated to control flow, temperatures, pressures and so on. All these final control elements - flood gates, rudder, valves - must be operated by actuators. The function of the actuator is to move to control elements in the processes. In order to move the actuator, there must be a medium for transmitting the required power or action. All the actuators are mechanical in nature. The common means of transmitting the power are: pneumatic (air), hydraulic (fluid), and electrical (motors). The actuators must be designed to work for that medium. There are several advantages and disadvantages for choosing a particular medium. For example, pneumatic actuators are particularly useful when the atmosphere contains flammable gases. By using pneumatic actuators, there is very little chance that a spark can be generated to cause a fire. However using air for actuating may be more expensive to install and to maintain. Using electrical motors to drive gearing may be an excellent choice when cost is a consideration. Electrical wires can be laid more easily and electrical systems are relatively clean. Use of hydraulics may be excellent where power and simplicity is important. Most of the actuators operate in a linear (straight line) manner. Hydraulic rams, and pneumatic diaphragms work in this manner. There are also some that are constructed to operate in a rotary manner. Electrical motors normally operate in a rotary manner. However if a linear motion is needed, this can be obtained by means of spur gears, rack and pinion arrangements, crank and other means. Actuators can provide the power to move final control elements, but do they know when to stop? A good control system will provide the sensing and feedback loop to tell the actuator when to stop its actions. Well folks, be in control! "Tap the Traditional Effective Information Source!" Magazines contain more information for you. Use them to as your tools! "Obtain QUALITY INFORMATION through these time-tested media!" Many years of working experience in Marine, Facilities, Construction has given the author material for writing e-books and articles related to engineering, and management. Subscribe to facworld ezineMore information at Marine Engineer and M & E Engineer
MORE RESOURCES:
Google News |
|
|
|
RELATED ARTICLES
Sump Pump Installation for Do-It-Yourselfers According to recent surveys, over 85% of all homes with basements will experience some form of wet basement problems in their lifetime. Installing a sump pump in the basement can be a great benefit, even if it's only to keep the water from getting deep or to act as a floor drain. Choosing The Right Window When you have reached the decision to purchase new windows for your home, be sure you choose the right windows to suit your needs. Determine the reason why you are replacing your windows. Bathroom Magic Believe it or not, the bathroom is one of the most magickal rooms in your house; Your make up box and medicine chest can be treasure chest of tools , the bathtub and shower are wonderful place to conduct cleansing and attraction rituals, and the toilet can be a handy mechanism for flushing away negativity.Here are some examples of positive magick that can be performed in your powder room. Installing a Bathroom Vanity and Countertop The installation of a new bathroom vanity and countertop can transform an outdated bathroom into a contemporary one. Installing a vanity and countertop is simple to do and can be purchased from any home improvement store for less than $500. Whats So Special About My Front Door? "The doors we open and close each day decide the lives we live."- Flora WhittemoreYour front door welcomes all to your home. Small Cabin Plans - Finding a Great Log Cabin Plan Online Small cabin plans - how do you find that special log cabin plan that is just right for you? Before the internet, you would buy some cabin plans books and look through the plans to see if any appealed to you. If you found one, you could order the log cabin plan you wanted by telephone or mail. Operation Closet When the wife comes to you one fine day and says, "dear, I think we need a new closet for the bedroom", the heart surges in joy. Immediate thoughts of grabbing the coat and rushing off on a mission to the nearest DIY center enters the mind before realization dawns that first must come a shower and then work. Modern Rugs The modern look is a highly admired form of interior design. The word Modern is a broad term that encompasses many different techniques and styles of design. Making the Most of a Small Bathroom In bathroom terms at least, bigger doesn't have to be better - It's all just a case of making the most of the modest proportions you're presented with! And what's more, designing a bathroom that's small on space usage but big on style and functionality should be a lot more fun.The Click Bathrooms guide to maximising a modest bathroom follows three simple principles?1 - Make it seem biggerA great way of tackling a bathroom with limited dimensions is by creating the illusion of space. Understanding Air Purifiers Purchasing an air purifier can be confusing, and you do get an awful lot of information thrown at you when you visit the different manufacturing websites, don't you? How can you tell what's what, and why do we need air filters anyway? And how do air purifiers work? Is the air really that bad? Haven't we been breathing the same air for thousands of years? Yes and no. First of all, we've been breathing the same air for thousands of years, but we live in a symbiotic relationship with the plants around us - that is, we rely on each other to survive. Portable Air Conditioners Ensure Economy And Convenience Small is beautiful and convenient and so is the portable air conditioner as it can be shifted from one place to the other very easily. Read on to find out all the other advantages. Heat Up the Hot Tub from 20,000 Feet Homeowners are getting high-tech when it comes to controlling the appliances in their homes, but they insist the control systems are reliable, convenient and easily understood. Technology isn't fun to use if you feel like you need a master's degree in engineering to make things work. The Best Time to Inspect Your Home! Home inspections conducted prior to a home being placed on the market is one of the wisest moves a seller can make. The initial response from sellers when approached with the idea of an inspection done as the home is about to be put up for sale is most always the same - "What?!"Let's review a few of the most common concerns about Pre-Listing Home Inspections. Tearing Down the House Last year, we bought this big ol' 1887 house. We are just now coming to grips with the magnitude of the "upgrades" planned. How to Replace the Rollers on Your Patio Sliding Glass Glass Door Hiring a professional to replace your rollers could cost you around $100 not including the cost of the replacement parts. Below are detailed steps containing all the information you will need to know to replace your patio sliding glass door rollers yourself. Are Showers Harmful to Your Health? The last thing you would think about when you are taking a nice, refreshing shower is, "Am I jeopardizing my health"?Chlorine is used by many municipalities to disinfect their water supply.Unfortunalely, according to many health experts, chlorine has been linked to breast, bladder and colon cancer. How I Got A Robot To Vacuum The House Like most people I really hated to vacuum the house. I thought anyone who enjoyed vacuuming was close to insanity. Marble Information Marble is any limestone or dolomite that can take a high polish and still be usable. Marble is generally formed from limestone undergoing metamorphism. Repairing a Hole in a Sheetrocked Wall It is quite simple to repair a hole in a Sheetrocked wall, however there are minor differences in methods of repair depending on how large the hole is.Small size holes (1/4" or smaller)With small holes, simply apply a little joint compound or wall putty with a small putty knife or trowel. Home Inspection Basics The Home InspectorWhen you think about it, it is a bit odd. A person hires a stranger to snoop around another stranger's house for a couple hours and report back.
|
| home | site map |
| © 2006 |
