AImtract--Industrial plants which contain unilateral flow of material are considered. First, it is shown that such plants can be represented by finite-dimensional difference equations after sampling. Then, the design of discrete-time optimal control systems is studied based on the difference equatio
Optimal control of multivariable systems with pure time delays
β Scribed by M.A. Soliman; W.H. Ray
- Publisher
- Elsevier Science
- Year
- 1971
- Tongue
- English
- Weight
- 654 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0005-1098
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β¦ Synopsis
A neighboring optimal feedback control law for non-linear-systems having time delays may be applied to many systems including a non-isothermal continuous stirred tank reactor.
Summary--A brief review of the development of the theory and computational approaches for the optimal control of multivariable systems having pure time delays is given. Following this is a detailed discussion of the optimal feedback control of both linear and non-linear systems having pure time delays. A neighboring optimal feedback control scheme is developed for non-linear problems, and a chemical reactor control problem is worked to illustrate the performance of the controller.
Open loop control
The open loop control problem is to maximize the functional I=G(x(O))+ F(x(t), x(t-~l) .... x(t-~Zm), 0 u(t), n(t-flt) .... u(t-fl,))dt
(1) *
π SIMILAR VOLUMES
A multivariable version of the classical Smith predictor is applied to a double effect evaporator containing time delays in the control variables and some of the output variables. As in the classical approach, the multivariable Smith predictor eliminates time delays from the characteristic equation
## Abstract The suboptimal control policy obtained from series expansion of timeβdelay terms is useful when the delays are small. The second method involving direct search on the constant gain matrix is applicable even for large delays. Both of these proposed methods are computationally simple and