As man learns to make machines that no longer rely on animal or human power Julian Draxler Jersey , he finds that he has to develop some means to manage and control them. Powerful machines let loosed by themselves will create havoc and destruction.

Control systems have been developed for machines or processes so as to reduce the chances of failure and to provide the required results.

Basically, there are open loop control systems and close loop control systems.

Open loop systems are those where the controller action is not related to the final result. This means that there is no feedback to the controller to adjust the control action. A simple example is when you fill up a tank using a garden hose. As long as the tap is opened, the water will flow. The height of the water in the tank will not make the tap close.

However, when you see the tank becoming full and decide to close the tap Juan Bernat Jersey , you are adding the element of feedback to the loop. It then becomes a closed loop. But it is a human controlled closed loop.

Closed loop systems use feedback from the final result to adjust the control action accordingly.

But how would you like to stand in one position, watch the process going on and operate valves, or switches according to the conditions you want? This is very tiring, isn't it?

Moreover Jese Jersey , human beings are prone to fatigue, boredom, and misjudgment. Manual control works very well only if the speed of the response is very slow, and the result is not very critical or important. Human controlled systems can become very unreliable.

Machines are made to replace humans in most control systems today.

The basic feature of any control system consists of 4 elements. These are the measuring element Giovani Lo Celso Jersey , the controlling element, the set value, and the correcting element.

The measuring element provides a means of detectionmeasurement of the conditions required. This is the "eyes" or "ears" (or other senses) of the system.

The controlling element is the place where all the decisions on what actions to take are being made. It can be considered the "brains" of the system. It must make decisions based on certain guidelines or values required. The set values are inputted into the system by humans.

The correcting element is where the correction to the process is done. It can be considered like the "hands" or "feet" of the system. It must take certain physical actions to bring the processes back to the set value.

Well folks, be in control!

BREAK FREE from computer dependence!

Why use computers when you can read magazines.

Avoid eye strain and fatigue.

Many years of working experience in Marine Gianluigi Buffon Jersey , Facilities, Construction has given the author material for writing e-books and articles related to engineering, and management. Subscribe to facworld ezine

More information at Marine Engineer and M & E Engineer >Common Chimney Repairs Needed in Homes
Posted by astepintime on October 23rd, 2019


Chimney repair provided by professional chimney sweep service is crucial for optimum performance and longevity of your chimney. Besides Garissone Innocent Jersey , it is crucial from safety point of view as well. Although this is obvious, yet many homeowners do not pay attention to their chimneys. Taking chimney repair for granted is never a good idea. In this post we will see commonly needed repairs for your home chimney.

1. Damaged Cap
Chimney cap is one of the most crucial parts of your chimney. If you ask any chimney service in Richmond, they will tell you how important it really is. It needs to be taken care of properly as ignoring the chimney cap can actually result in costlier repairs later which is desired by no home owner. A broken chimney cap will allow rain water, melting snow water Edinson Cavani Jersey , small animals, birds, and bats to enter which is very troubling. Besides, your chimney gets damaged which requires costly repairs.

2. Creosote
Creosote build-up is always on the cards Dani Alves Jersey , if you use your chimney. Burning wood at your fireplace is common during the winter season and so is the soot build-up. It should not be ignored. You should contact a chimney sweep service nearby to get that removed from time to time. Otherwise, it would cause inefficient wood burning which also puts your family safety at stake. You must be aware that most of the chimney fires are a result of creosote which has been there for a while.

3. Flue Cracking
The inner section of your chimney is called flue. It is apparent that it is prone to a number of issues. Professional chimney sweep service providers give this part of the chimney a lot of importance. If they spot any cracks near the flue, they will immediately tell you that there might be much more damage underneath. Flue inspection is one of the most important bits of the chimney inspection process.

4. Damaged Masonry
The masonry of your chimney must be inspected by a professional chimney services in Richmond before and after every winter. It is exposed to extreme heat and fumes and must not be left unattended.

5. Blockages
One of the major reasons behind blockages is creosote build-up. Besides, dead animals or nests made by them are the other reasons. Professional chimney sweep service providers inspect your chimney for any sort of blockages caused due to any of these reasons.

Hope you found the post useful. You must get your chimney inspected and repaired on a regular basis if you want it to function properly. For more information Colin Dagba Jersey , get in touch with us and we will be more than happy to answer your queries.

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