Sampled data systems
Encyclopedia
A sampled-data system is a control system
where continuous-time plant (control theory)
is controlled with a digital device. Under periodic sampling, the sampled-data system is time-varying but also periodic, and thus it may be modeled by a simplified discrete-time system obtained by discretizing the plant. However, this discrete model does not capture the intersample behavior of the real system, which may be critical in a number of applications.
The analysis of sampled-data systems incorporating full time information leads to new challenging control problems with a rich mathematical structure. Many of these problems have been solved only very recently.
Control system
A control system is a device, or set of devices to manage, command, direct or regulate the behavior of other devices or system.There are two common classes of control systems, with many variations and combinations: logic or sequential controls, and feedback or linear controls...
where continuous-time plant (control theory)
Plant (control theory)
A plant in control theory is the combination of process and actuator....
is controlled with a digital device. Under periodic sampling, the sampled-data system is time-varying but also periodic, and thus it may be modeled by a simplified discrete-time system obtained by discretizing the plant. However, this discrete model does not capture the intersample behavior of the real system, which may be critical in a number of applications.
The analysis of sampled-data systems incorporating full time information leads to new challenging control problems with a rich mathematical structure. Many of these problems have been solved only very recently.
External links
- Digital controlDigital controlDigital control is a branch of control theory that uses digital computers to act as system controllers.Depending on the requirements, a digital control system can take the form of a microcontroller to an ASIC to a standard desktop computer....
- Sampling (signal processing)Sampling (signal processing)In signal processing, sampling is the reduction of a continuous signal to a discrete signal. A common example is the conversion of a sound wave to a sequence of samples ....
- Ideal samplerIdeal samplerIn signal processing, an ideal sampler is a theoretical operation whose input is a continuous signal and whose output is a sequence of instantaneous values of the signal at discrete moments of time, which is called a discrete signal....