The model parameters can be continuously identified based on the input and output data of the object, a process known

as online system identification. As the production process continues, the model becomes more and more accurate and

closer to reality through the online debate. Since the model is constantly being improved, it is clear that the control action

based on this model synthesis will also be constantly improved. In this sense, the control system has a certain adaptability.

For example, (Siemens 6ES7322-1BL00-0AA0 SIMATIC S7-300 Digital Output Module)when the system is designed,

the initial information on the characteristics of the object is lacking, so the system may not perform well

when it is first put into operation, but after a period of operation, through online identification and control,(B&R

X20CP1485-1 CPU I/O  Processor) the control system gradually adapts and eventually adjusts itself to a satisfactory

working state. For example, the characteristics of some control objects may change significantly during operation, but

through online identification and change of controller parameters, the system can also gradually adapt.

Conventional feedback control systems have a certain ability to suppress changes in the internal characteristics of the

system and the influence of external disturbances, but because the controller parameters are fixed, (Allen Bradley

1762-IQ16 MicroLogix Input Module)when the internal characteristics of the system change or the external disturbances

change by a large margin, the performance of the system （Siemens 6ES7321-1FH00-0AA0 Digital Input Module) often

decreases significantly, or even is unstable. Therefore, adaptive control is appropriate for systems with a wide range

of object characteristics or disturbance characteristics, while requiring frequent maintenance of high performance specifi-

cations. However, it should also be noted that adaptive control is much more complex and costly than conventional feed[-

back control, and is therefore only considered when the desired performance cannot be achieved with conventional feed-

back.

The interested persons of mentioned parts may relate with me, price liberally. --

Vivi (sh_plc@163.com).