Overall the survey shows that the application of electronics is happening in the industry suggests that the development of digital techniques happen very quickly. There are many reasons why this could happen, but only two reasons in this section are important. One is the reduction of the uncertainty, related information encoded digitally compared to the analog information.
For the record we are talking about is the uncertainty (uncertainty), open the accuracy (accuracy). If an analog system shows information, should be kept electronically influence of noise, distortion reinforcement amplifier, the loading effect, and other problems that are common in designing analog elektonika. In the digitally encoded signal, wherein, the cable carrier with a high level (1) or low (0), is not a problem to do with analogue processing.
Then there is no certainty that parcel in the representation of encoding digital information as it is unlikely the effect of false nature of the information. The second reason of the development of digital electronics is a growing desire in the use of digital computers in industrial processes. Digital computer, naturally, requires information that is encoded in digital format before the information is used.
Pengkodisi usage of digital signals would be the question of why computers are used widely in the industry. There are several reasons that can answer these questions, namely:
1. A computer can be used to control easily from a konrol systems with many variables.
2. Through computer programming, ketidaklinearan of a sensor output can be in linearkan.
3. Equation complicated control can diselesaiakan to determine the required control functions.
4. The computer has the ability to form small form complex digital processing circuits, as an integrated circuit (IC = integrated circuit).
Finally, the development of microprocessors has perfected a change in the form of digital process control system as the basis for control. With microprocessor (the base of the computer), the implementation of a computer as a basis for control systems have become more practical, and with it of course requires knowledge about digital signal conditioning. The technology reduces not only in physical size, but also the power consumption and the average failure occurs.
The use of digital techniques in control systems require variabe measurement and process control information that is encoded into digital form. Digital signal mempunyal two simple types of voltage levels inside a cable. We say that digital information has a high state (H or 1) and low (L or 0) on a cable carrying a digital signal. Before learning about digital signal processing, should we need to learn first about the concept of numbers and basic digital electronics first.
Definition
System: a combination of several components that work together and form a particular purpose.
Process (natural): a sequence of continuous operation or a sequence leh yangdicirikan development changes that occur slowly step by step in a relatively fixed and provide an outcome or end.
Process (artificially): surgery performed on an ongoing basis that Consist some controlled action or movement that sistematikdiarahkan on an outcome or end.
Plant: can be part of an equipment function together to form a particular operation.
Disorders: a signal that is likely to affect the (random) value of the output of a system: internal and external disturbances.
control system feedback (feedback control system): yangmempunyai control system feedback elements, whose function is to observe what happens to the output compared to the input (desired). Sometimes the control system can be divided into two classes. If the destination control system untukmempertahankan physical variables at some constant value in the presence of disturbances, called
regulator (automatic regulating system). An example is the temperature control system and others. The second type is
position control system or servo mechanism (servomechanism), a system which is used to control the position or movement of mechanical, seringkalidigunakan to describe the control system with the physical variables that must follow or track, in function of the desired time. An example is the movement of the robotic arm and others.
process control system (process control system): the control system commonly used in industry, such as to control the temperature, pressure, flow, liquid surface level and others.
open ring control system (open loop system): a control system where there is no element that happens to observed output compared to the input (desired), although the use of a controller (the controller) to obtain the desired response.
closed-loop control system (closed loop system): another name of the control system with feedback.