scholarly journals Hypersonic vehicle control law development using H infinity and mu-synthesis

1992 ◽  
Author(s):  
IRENE GREGORY ◽  
JOHN MCMINN ◽  
JOHN SHAUGHNESSY ◽  
RAJIV CHOWDHRY
Keyword(s):  
Vehicle Control ◽  
Hypersonic Vehicle ◽  
Control Law ◽  
H Infinity ◽  
Mu Synthesis

scholarly journals Low-Complexity Decentralized Active Damping of One-Dimensional Structures

2018 ◽  
Vol 2018 ◽  
pp. 1-9
Author(s):  
Petr Hušek ◽  
Filip Svoboda ◽  
Martin Hromčík ◽  
Zbyněk Šika
Keyword(s):  
Damping Ratio ◽  
Stability Margin ◽  
Low Complexity ◽  
Active Damping ◽  
Fine Tuning ◽  
Control Performance ◽  
Control Laws ◽  
H Infinity ◽  
One Dimensional ◽  
Mu Synthesis

In the paper, we propose distributed feedback control laws for active damping of one-dimensional mechanical structures equipped with dense arrays of force actuators and position and velocity sensors. We consider proportional position and velocity feedback from the neighboring nodes with symmetric gains. Achievable control performance with respect to stability margin and damping ratio is discussed. Compared to full-featured complex controllers obtained by modern design methods like LQG, H-infinity, or mu-synthesis, these simplistic controllers are more suitable for experimental fine tuning and are less case-dependent, and they shall be easier to implement on the target future smart-material platforms.

scholarly journals Control law design of hypersonic vehicles using the elastic surrogate model

2019 ◽  
Vol 39 (1) ◽  
pp. 216-229
Author(s):  
Yanbin Liu ◽  
Yanhui Tong ◽  
Feiteng Jin
Keyword(s):  
Surrogate Model ◽  
Parametric Model ◽  
Hypersonic Vehicle ◽  
System Stability ◽  
Control Law ◽  
Analysis Method ◽  
Elastic Mode ◽  
Panel Methods ◽  
Sensitivity Analysis Method ◽  
Elastic Modes

This paper presents a novel control design strategy for the hypersonic vehicle using the elastic surrogate model. First, the parametric model is established for the rigid mode of the hypersonic vehicle based on the engineering estimation and panel methods. Then, the beam surrogate model is applied to identify the elastic mode of the hypersonic vehicle, and the complete parametric model including the rigid and elastic modes is obtained accordingly. Afterward, the control-relevant model is acquired based on the Morris sensitivity analysis method. Furthermore, the control system using the surrogate model is proposed for the hypersonic vehicle to suppress elastic disturbances and maintain system stability. Finally, an illustrative example of the hypersonic vehicle is provided to verify the effectiveness of the presented methods.

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