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- Supplementary Texts Types of control systems
| By subjecting air to very great pressure and cooling it is possible to transform it to the liquid state. – Подвергая воздух высокому давлению и охлаждению, возможно трансформировать его в жидкое состояние.
Supplementary Texts Types of control systems In practice, process control systems can be characterized as one or more of the following forms: - Discrete – Found in many manufacturing, motion and packaging applications. Robotic assembly, such as that found in automotive production, can be characterized as discrete process control. Most discrete manufacturing involves the production of discrete pieces of product, such as metal stamping. - Batch – Some applications require that specific quantities of raw materials be combined in specific ways for particular durations to produce an intermediate or end result. One example is the production of adhesives and glues, which normally require the mixing of raw materials in a heated vessel for a period of time to form a quantity of end product. Other important examples are the production of food, beverages and medicine. Batch processes are generally used to produce a relatively low to intermediate quantity of product per year (a few pounds to millions of pounds). - Continuous – Often, a physical system is represented through variables that are smooth and uninterrupted in time. The control of the water temperature in a heating jacket, for example, is an example of continuous process control. Some important continuous processes are the production of fuels, chemicals and plastics. Continuous processes in manufacturing are used to produce very large quantities of product per year (millions to billions of pounds). Applications having elements of discrete, batch and continuous process control are often called hybrid applications. Do the following tasks: - Translate the text and describe the forms of control systems. - Find some additional information. - Write down a summary of the text. жүктеу/скачать 464,87 Kb. Достарыңызбен бөлісу:
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