
528 Optimal Estimation of Dynamic Systems
8.4 Discrete-Time Control
The importance of discrete-time systems, described in §A.5, is well known with
the reliance on digital computers, which are used to process sampled-data systems
for estimation and control purposes. As discussed in §8.3, the Lagrange multiplier
approach with the use of Pontryagin-form necessary conditions is better suited for
modern-day problems. Hence, we only present this approach for the optimal con-
trol theory involving discrete-time systems. A more thorough treatise involving the
discrete-time Euler-Lagrange equations and associated transversality conditions can
be found in Refs. ...