Multi-saturation anti-windup structure for satellite control

Future space missions demand high precision control in both angular and linear axes. Therefore propulsion systems providing effort in both axes with a high precision are needed. Microthrusters can satisfy these requirements. These actuators are usually subject to present an allocation problem. Moreover, because of this demand on high precision, the maximal propulsion capacity appears to be critically low, leading to a possible saturation of the actuators. A multi-saturation based model for a highly non-linear allocation function is presented. An anti-windup strategy dealing with the actuator saturation is proposed. Simulations consider a two satellites flight formation scenario. They show the improvement on performance and stability tolerance to off-nominal initial conditions. Simulations are based on a nominal model provided by Thales Alenia Space (TAS).

[1]  Matthew C. Turner,et al.  Antiwindup for stable linear systems with input saturation: an LMI-based synthesis , 2003, IEEE Trans. Autom. Control..

[2]  Wayne C. Durham.  Constrained Control Allocation , 1992 .

[3]  Matthew C. Turner,et al.  A tutorial on modern anti-windup design , 2009, 2009 European Control Conference (ECC).

[4]  C. Charbonnel,et al.  DARWIN Precursor Demonstration Mission: the ICC2 Study, from Gnc Design to Real-Time Test Bench Validation , 2006 .

[5]  Tingshu Hu,et al.  Control Systems with Actuator Saturation: Analysis and Design , 2001 .

[6]  Luca Zaccarian,et al.  An anti-windup strategy for active vibration isolation systems , 2006 .

[7]  Sophie Tarbouriech,et al.  Anti-windup Design for Satellite Control with Microthrusters , 2009 .

[8]  David G. Ward,et al.  An antiwindup approach to enlarging domain of attraction for linear systems subject to actuator saturation , 2002, IEEE Trans. Autom. Control..

[9]  Sophie Tarbouriech,et al.  Antiwindup design with guaranteed regions of stability: an LMI-based approach , 2005, IEEE Transactions on Automatic Control.

[10]  Sophie Tarbouriech,et al.  Optimization and implementation of dynamic anti-windup compensators with multiple saturations in flight control systems , 2009 .

[11]  A. Teel,et al.  Anti-windup for exponentially unstable linear systems with inputs limited in magnitude and rate , 2000, Proceedings of the 2000 American Control Conference. ACC (IEEE Cat. No.00CH36334).

[12]  S. Tarbouriech,et al.  Anti-windup design: an overview of some recent advances and open problems , 2009 .

[13]  Tingshu Hu,et al.  Control Systems with Actuator Saturation: Analysis and Design , 2001 .

[14]  Karolos M. Grigoriadis,et al.  Actuator saturation control , 2002 .

[15]  Guido Herrmann,et al.  Robust control applications , 2007, Annu. Rev. Control..

[16]  A. Teel.  Anti-windup for exponentially unstable linear systems , 1999 .