Sampled data systems

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.

References

• Chen, Tongwen; Bruce Francis (1995). Optimal sampled -data control systems. London: Springer-Verlag. ISBN 3-540-19949-7. 
• Zhang, Xiaotian; Spencer, J. W. (2011). Linear Voltage Control Scheme with Duty-Ratio Feedforward for Digitally Controlled Parallel Inverters. IEEE Transactions on Power Electronics. ISSN 0885-8993. 

External links

• Digital control
• Sampling (signal processing)
• Ideal sampler