Authors:
Leonid Mirkin,
Volume: 1, Page 4584 Paper number 1598
Abstract:
In the paper the structure of the H^2 and H^(infinity) suboptimal controllers
is studied. In both cases the suboptimal controllers have the form
of the dead-time compensator reminiscent of that of the famous Smith
predictor. It is shown that unlike the H^2 case, the H^(infinity) dead-time
compensator takes into account the exogenous disturbance signal. Since
the disturbance is not measurable, the H^(infinity) dead-time compensator
``predicts'' it on the basis of the worst-case scenario.
Authors:
Nagato Ohse,
Takashi Yanagisawa,
Ryo Morita,
Volume: 1, Page 4588 Paper number 1578
Abstract:
This paper proposes an linear matrix inequality (LMI) approach to simultaneous
optimization design of structure and dynamic output feedback controller
under H-infinity constraint. First, a controlled object (plant) and
the closed-loop system are described by descriptor form. Secondly,
H-infinity constraint represented as a Riccati inequality is decoupled
into two low-order Riccati inequalities solved consecutively. Based
on the solutions of two inequalities, we can derive a controller and
structural parameters for H-infinity performance. The problem can be
reduced to convex optimization problem (COP) subject to inequality
constraints.
Authors:
Amol J. Sasane,
Ruth F. Curtain,
Volume: 1, Page 4594 Paper number 1467
Abstract:
The optimal Hankel norm approximation problem is solved for a class
of infinite-dimensional systems without assuming exponential stability.
Authors:
Mark E. Halpern,
Volume: 1, Page 4600 Paper number 1574
Abstract:
In this paper we investigate the exact solution, minimizing the l_(infinity)
norm of the regulated output for a fixed input in SISO discrete-time
feedback control systems. This is achieved by allowing non-zero steady
state value and parametrizing the output to have a rational transfer
function with chosen poles on the stability boundary. Alongside these
l_(infinity)-optimal solutions, we obtain solutions in l_1 with the
same order transfer functions and arbitrarily close l_(infinity) norms.
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