Читать книгу Control Theory Applications for Dynamic Production Systems - Neil A. Duffie - Страница 38

1 1 The term “discrete-time” differentiates this type of model from discrete-event simulation models.

2 2 Here and in subsequent examples, well-known solutions for the differential equations obtained are not derived. The tools of control system engineering that are presented in subsequent chapters generally make it unnecessary in practice for production engineers to find such solutions.

3 3 It often is convenient to use relative change as a variable in dynamic models of the components of production systems.

4 4 Henceforth, staircase plots will be presented without explicitly denoting discrete values at times kT.

5 5 The reader is referred to the Bibliography and many other publications on nonlinear dynamics and nonlinear control theory for other approaches to modeling nonlinear behavior.

6 6 Other options include choosing to regulate a variable other than lead time (work in progress, due date deviation, etc.) and designing non-linear decision rules.