Industrial Servo Control Systems

2002 ◽  
Author(s):  
George W. Younkin
Keyword(s):  
Control Systems ◽  
Servo Control

Ferromagnetic Shape Memory Thin Film In-Plane Actuators: Assessment of Mechanical Output

2007 ◽  
Author(s):  
Vesselin Stoilov
Keyword(s):  
Thin Film ◽  
Shape Memory ◽  
Control Systems ◽  
Multiscale Model ◽  
Servo Control ◽  
Ferromagnetic Shape Memory Alloy ◽  
Shape Memory Actuators ◽  
Micro Actuators ◽  
Concurrent Simulation ◽  
Ferromagnetic Shape Memory

Ferromagnetic shape memory alloy micro actuators and motors are promising for applications in various servo control systems, with the potential to provide ultra(sub-nano)-precision positioning and compensation. This article shows that in an in-plane configuration, thin film ferromagnetic shape memory actuators open the possibility to reach more powerful actuators keeping the same geometric dimensions by simply stacking these films. The assessment of mechanical output for the FSMA thin film actuators have been done with a multiscale model, which allowed for concurrent simulation of the phenomena at atomic and mesoscale.

An Analysis Framework for Evaluating Dropout Compensation Strategies in Wireless Servo Systems

2008 ◽  
Vol 130 (3) ◽  
Author(s):  
Paul A. Kawka ◽  
Andrew G. Alleyne
Keyword(s):  
Control Systems ◽  
Servo Control ◽  
Linear Matrix ◽  
Analysis Method ◽  
Analysis Framework ◽  
Feedback Systems ◽  
Servo Systems ◽  
Specific Data ◽  
Simulation And Experiment ◽  
H2 Performance

This paper presents an approach for analyzing the performance of dropout compensation strategies for linear servo control systems operating over communication channels with losses. A loss of communication causes the normal control action to be replaced by an appropriately designed dropout compensation action. A linear matrix inequality based approach is given for examining H∞ and/or H2 performance of wireless feedback systems using dropout compensation where we assume a two-state Markov model for the communication network. To illustrate the analysis method, we introduce two specific data dropout compensation schemes: zero order hold and estimation. These two schemes are compared in simulation and experiment to validate the effectiveness of the performance analysis.

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