Multiple input-multiple output adaptive feedback control strategies for the active headrest system: design and real-time implementation

2003 ◽  
Vol 17 (10) ◽  
pp. 785-800 ◽  
Author(s):  
Marek Pawelczyk
Keyword(s):  
Feedback Control ◽  
System Design ◽  
Real Time ◽  
Control Strategies ◽  
Multiple Input Multiple Output ◽  
Adaptive Feedback ◽  
Adaptive Feedback Control ◽  
Multiple Input ◽  
Input Multiple Output

Nondiagonal MIMO QFT Controller Design for Darwin-Type Spacecraft With Large Flimsy Appendages

2007 ◽  
Vol 130 (1) ◽  
Author(s):  
Mario Garcia-Sanz ◽  
Irene Eguinoa ◽  
Marta Barreras ◽  
Samir Bennani
Keyword(s):  
Disturbance Rejection ◽  
Controller Design ◽  
Control Strategies ◽  
Multiple Input Multiple Output ◽  
H Infinity ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Low Stiffness ◽  
Multiple Spacecraft ◽  
Mimo Model

This paper deals with the design of robust control strategies to govern the position and attitude of a Darwin-type spacecraft with large flexible appendages. The satellite is one of the flyers of a multiple spacecraft constellation for a future ESA mission. It presents a 6×6 high order multiple-input–multiple-output (MIMO) model with large uncertainty and loop interactions introduced by the flexible modes of the low-stiffness appendages. The scientific objectives of the satellite require very demanding control specifications for position and attitude accuracy, high disturbance rejection, loop-coupling attenuation, and low controller order. The paper demonstrates the feasibility of a sequential nondiagonal MIMO quantitative feedback theory (QFT) strategy controlling the Darwin spacecraft and compares the results with H-infinity and sequential diagonal MIMO QFT designs.

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