New Results on Linear Time Invariant and Parameter Varying Static Output Feedback

2008 ◽  
Vol 31 (5) ◽  
pp. 1230-1238 ◽  
Author(s):  
Ricardo S. Sanchez-Pena ◽  
Phalguna Kumar Rachinayani ◽  
Dario H. Baldelli
Keyword(s):  
Output Feedback ◽  
Linear Time ◽  
Static Output Feedback ◽  
Linear Time Invariant ◽  
Parameter Varying ◽  
Time Invariant ◽  
Static Output

scholarly journals Static output feedback stabilization of discrete time linear time invariant systems based on approximate dynamic programming

2020 ◽  
Vol 42 (16) ◽  
pp. 3168-3182
Author(s):  
Okan Demir ◽  
Hitay Özbay
Keyword(s):  
Discrete Time ◽  
Output Feedback ◽  
Linear Time ◽  
Feedback Stabilization ◽  
Mixed Integer ◽  
Static Output Feedback ◽  
Linear Time Invariant ◽  
Time Invariant ◽  
Time Linear ◽  
Static Output

This study proposes a method for the static output feedback (SOF) stabilization of discrete time linear time invariant (LTI) systems by using a low number of sensors. The problem is investigated in two parts. First, the optimal sensor placement is formulated as a quadratic mixed integer problem that minimizes the required input energy to steer the output to a desired value. Then, the SOF stabilization, which is one of the most fundamental problems in the control research, is investigated. The SOF gain is calculated as a projected solution of the Hamilton-Jacobi-Bellman (HJB) equation for discrete time LTI system. The proposed method is compared with several examples from the literature.

scholarly journals Eigenvalue Placement by Quantifier Elimination - the Static Output Feedback Problem

2020 ◽  
Vol 24 (3) ◽  
pp. 409-427
Author(s):  
Klaus Röbenack ◽  
Rick Voßwinkel
Keyword(s):  
Output Feedback ◽  
Linear Time ◽  
Quantifier Elimination ◽  
Static Output Feedback ◽  
Design Problems ◽  
Linear Time Invariant ◽  
Linear Time Invariant Systems ◽  
Active Research ◽  
Time Invariant ◽  
Static Output

This contribution deals with the static output feedback problem of linear time-invariant systems. This is still an area of active research, in contrast to the observer-based state feedback problem, which has been solved decades ago. We consider the formulation and solution of static output feedback design problems using quantifier elimination techniques. Stabilization as well as more specified eigenvalue placement scenarios are the focus of the paper.

Synthesis Of Robust Control Systems With Dynamic Actuators And Sensors Using A Static Output Feedback Method

2020 ◽  
Author(s):  
Bruno Sereni ◽  
Roberto K. H. Galv˜ao ◽  
Edvaldo Assun¸c˜ao ◽  
Marcelo C. M. Teixeira
Keyword(s):  
Output Feedback ◽  
Linear Time ◽  
Robust Stabilization ◽  
Linear Matrix ◽  
Static Output Feedback ◽  
Sensors And Actuators ◽  
Actuator Dynamics ◽  
Linear Time Invariant ◽  
Incomplete System ◽  
Static Output

In this paper, we propose a strategy for the robust stabilization of uncertain linear time-invariant(LTI) systems considering sensors and actuators whose dynamics cannot be neglected. The control problem isaddressed by defining an augmented system encompassing the plant, sensor and actuator dynamics. The centralidea of the proposed method lies in the fact that the actual plant states, measured by sensors, are not available forfeedback, and thus, the problem can be regarded as a static output feedback (SOF) control design. Then, SOFgain matrices are computed through a two-stage method, based on linear matrix inequalities (LMIs). Intendingto illustrate the efficacy and explore the main features of the proposed technique, some computational examplesare presented in an application of the method for the design of a robust controller for the classic benchmarkproblem of the two-mass-spring problem. The examples cover the case of asymptotic stabilization of known anduncertain system model, in addition to decay rate inclusion and incomplete system state information.

scholarly journals Stabilizability and Disturbance Rejection with State-Derivative Feedback

2010 ◽  
Vol 2010 ◽  
pp. 1-12 ◽  
Author(s):  
Manoel R. Moreira ◽  
Edson I. Mainardi Júnior ◽  
Talita T. Esteves ◽  
Marcelo C. M. Teixeira ◽  
Rodrigo Cardim ◽  
...  
Keyword(s):  
Control Systems ◽  
Output Feedback ◽  
Disturbance Rejection ◽  
Linear Time ◽  
State Space Model ◽  
The State ◽  
Analysis And Design ◽  
Linear Time Invariant ◽  
Time Invariant ◽  
Static Output

In some practical problems, for instance in the control of mechanical systems using accelerometers as sensors, it is easier to obtain the state-derivative signals than the state signals. This paper shows that (i) linear time-invariant plants given by the state-space model matrices{A,B,C,D}with output equal to the state-derivative vector are not observable and can not be stabilizable by using an output feedback ifdet⁡(A)=0and (ii) the rejection of a constant disturbance added to the input of the aforementioned plants, consideringdet⁡(A)≠0, and a static output feedback controller is not possible. The proposed results can be useful in the analysis and design of control systems with state-derivative feedback.

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