电气-201509课件7科技论文写作2控制系统单词.pptVIP

Vocabulary 7Process Control;Process Control;;The three basic operations that must be present in every control system are: 1) Measurement (M): Measuring the variable to be controlled is usually done by the combination of sensor and transmitter. 2) Decision (D): Based on the measurement, the controller must then decide what to do to maintain the variable at its desired value. 3) Action (A): As a result of the controller’s decision, the system must then take an action. This is usually accomplished by the final control element or actuator.; 2. n. 传感器 n. 变送器 n. 变换器 temperature sensor/transducer/transmitter thermal sensor temperature probe ***** thermocouple n. 热电偶 thermistor n. 热敏电阻 differential pressure level sensor Hall displacement transducer electromagnetic flow transmitter bellows pressure transducer target flow transmitter photoelectric tachometric/speed transducer ; 3. n. 控制器；调节器；控件 Controller：a mechanism that controls the operation of a machine temperature controller fuzzy controller 控制算法 self-adaptive control algorithm servo control algorithm group control algorithm proportional controller proportional-integral controller proportional-integral-derivative controller ; 4. n. 驱动器，执行机构 The common final control elements are control valves, electric motors, variable speed pumps and conveyors. electric/pneumatic actuator solenoid/ electromagnetic valve 5. 直接数字控制体系结构 In the completely centralized direct digital control (DDC) architecture, the complete control strategy was executed in a computer. Because all the functions were concentrated into a computer, the entire system with all of its loops would fail if there were even a single fault. It was not uncommon to have local pneumatic controllers existing in the field on standby, ready to be put in operation once the DDC failed. ;6.