| 1. |
- Glad, Torkel, 1947-
(author)
-
Deadbeat Control for Nonlinear Systems
- 1988
-
In: Analysis and Control of Nonlinear Systems. - Amsterdam : North-Holland. - 0444704965
-
Book chapter (other academic/artistic)
|
|
| 2. |
|
|
| 3. |
- Glad, Torkel, 1947-
(author)
-
Differential Algebraic Modelling of Nonlinear Systems
- 1989
-
Reports (other academic/artistic)abstract
- This paper discusses how the concepts of differential algebra can be used in the modelling of physical systems. In particular it is shown that the concepts of ranking and characteristic set can be used to give a structure to the set of physical equations. The characteristic set makes it easy to find the number of inputs and the order of the system. The question of observability can also be investigated using the characteristic set. In particular one can see that the order of an input output differential equation will be the same as the system order if and only if all variables are observable from the output.
|
|
| 4. |
|
|
| 5. |
|
|
| 6. |
|
|
| 7. |
|
|
| 8. |
|
|
| 9. |
|
|
| 10. |
- Glad, Torkel, 1947-
(author)
-
Output Dead Beat Control for Nonlinear Systems with one Zero at Infinity
- 1986
-
Reports (other academic/artistic)abstract
- The problem of output dead-beat control, i.e. one-step zeroing of the output, is considered for nonlinear systems with discrete-time controllers. The nonlinear system is assumed to have one zero at infinity. Conditions for the existence of the dead-beat control for small sampling intervals are derived. The closed-loop system is shown to be stable in the sense that all states converge to the origin if the controlled system is minimum phase.
|
|
| 11. |
|
|
| 12. |
|
|
| 13. |
|
|
| 14. |
- Glad, Torkel, 1947-
(author)
-
Robustness of Nonlinear State Feedback : A Survey
- 1987
-
In: Automatica. - : Elsevier BV. - 0005-1098 .- 1873-2836. ; 23:4, s. 425-435
-
Journal article (peer-reviewed)abstract
- A survey of robustness of nonlinear state feedback is given. For series perturbations there are fairly complete results, showing that under mild restrictions an optimal controller can tolerate an infinite increase in gain. For gain reductions there are some results for systems linear in the control. In particular there is a 50% reduction tolerance if the control penalty is quadratic. Usually the optimal controller cannot be computed exactly. There are some results showing the effects of truncation on the robustness. Essentially robustness is maintained but in a reduced (computable) part of the state space.
|
|
| 15. |
|
|
| 16. |
- Glad, Torkel, 1947-
(author)
-
Stability of Nonlinear Systems with Observers
- 1987
-
In: Proceedings of the 1st International Conference on Industrial and Applied Mathematics. - Linköping : Linköping University. - 9780898712247
-
Conference paper (peer-reviewed)
|
|
