• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Open and Closed Loop Control System

Extracts from this document...

Introduction

Ricki Lambert Control Technology Assignment 1 Task 3 In this assignment I shall be looking at the differences between open loop control systems, closes loop control systems and also looking at and identifying the input, output and feedback gained. Open Loop Control System The open loop control system is the cheapest form of control system you can have, this is due to its simplicity. The open loop control system has absolutely no artificial intelligence or any form of sensor what so ever. This then means there is nothing controlling the inputs going in to the system, this then means that accuracy may be deficient and the system will not be working to its true efficiency. An example of this kind of system would be that for a microwave. When we turn a microwave on we select the power we want and the time limit we want and away it goes. The thing is, when it is powering itself up, how does it no if it's hitting the true temperature we wanted successfully? ...read more.

Middle

Action - This is the action of the computer or comparator altering settings There are two differing types of systems that can be used for control and they are Analogue or digital. The two shall be explained in greater detail below. Digital and Analogue Control Systems The digital control system is used in the form of a micro controller to control a computer system. A digital controller is usually cascaded with the plant in a feedback system. The rest of the system can either be digital or analog. Some examples of analog systems with a digital feedback controller are: * Aircraft * HVAC * Electric motors * PID controllers * Radar * Robotics * Typically, a digital controller requires: For mixed control types such as digital and analogue systems we need a process of conversion, for example digital to analogue converters (these are called DACS). The opposite can take place, by using an analogue to digital conversion process called ADC. All of these analogue control systems are embedded with micro controllers. ...read more.

Conclusion

Below is a list of the possible input devises we can have within a system or a circuit. * Geophone - Converts earth tremors in to electrical voltage * Geiger-Muller tube used for measuring radioactivity * Cathode ray tube (CRT) - converts electrical signals into visual form When the electrical charge is received it then needs to be converted in to the correct signal type using one of the transducers above, however for these signals to be used correctly we need to obtain the appropriate components. * Lamp - The input for a lamp is electricity and this is then output as a light source after being converted. This type of power source is used for many things * Speaker - Gathers electricity from the data source and then is output as a volume so people can hear it. This also has a large application/usage basis * Heat - The input again is electricity, this is then converted and output as heat. This is normally found on things like electric fires and car cigarette lighters * Motor - This is input of electricity and then is output as movement energy. This type of system is used within moving doors ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Computer Science section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Computer Science essays

  1. Peer reviewed

    information systems assignment 2

    4 star(s)

    is selected and will store the information a lot easier and can be easily viewed by any user. Ease of use Spreadsheets are very easy to user as it is a standard program which appears on all computers. No training is needed for the use of this program and a

  2. Control Unit, Memory Unit, and Arithmetic Logic Unit. The CPU or Central Processing ...

    c) Speakers. Used to output sound from a computer system. Examiner Notes There are many other peripheral devices and, as has been mentioned, a knowledge of some others will not come amiss, however that is enough to be able to answer questions in the exam.

  1. Free essay

    Hardware and Functions of a Micro Processor

    is similar to the AND gate in that it again has two input values. This time however if there is an input of 1 at least once then the output will be one. The only time the output will be zero is when both values are zero on input.

  2. White Soul System Designs - creating a computer system.

    Problems When a stock data form is filled in it can some times become a mess due to ad handwriting or coffee stains after a long days work. This may make it hard to read. Searching for a stock name If a customer wants to purchase a certain item of

  1. Different Control Sensors

    may be used for; * A fan that regulates heat at different speeds * A radio that needs to operate on different frequencies The most common type of rotary switch is the rotary light switch, and the way in which this works is pretty straight forward.

  2. Creating a computer system for Wooten Basset Rugby Club

    Fee Owed -The amount paid will be displayed from. TOURNAMENT holds data relating to tournaments the clubs plays in: <Tournament Code> - Unique code which identifies each tournament. Winner - Eventual winner of tournament. 1.5 Entity Relationship Diagram This diagram of how data will be kept in the new system.

  1. With diagrams compare and contrast the relative advantages and disadvantages of digital transmission over ...

    Computer information is stored digitally, whereas information transmitted over telephone lines is transmitted in the form of analogue waves. A modem converts between these two forms. The role of the modem to transmit and receive digital data over a communications line normally used for analogue signals.

  2. Machine Shack Management System.

    What do you expect from the new system? I hope the new system can really do most of the work I do so it makes my job easier. I would also like it to be able to manage the items I have in stock and let me know when

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work