Acceleration feedback control (AFC) enhanced by disturbance observation and compensation (DOC) for high precision tracking in telescope systems

In this paper, a cascade acceleration feedback control (AFC) enhanced by a disturbance observation and compensation (DOC) method is proposed to improve the tracking precision of telescope systems. Telescope systems usually suffer some uncertain disturbances, such as wind load, nonlinear friction and other unknown disturbances. To ensure tracking precision, an acceleration feedback loop which can increase the stiffness of such a system is introduced. Moreover, to further improve the tracking precision, we introduce the DOC method which can accurately estimate the disturbance and compensate it. Furthermore, the analysis of tracking accuracy used by this method is proposed. Finally, a few comparative experimental results show that the proposed control method has excellent performance for reducing the tracking error of a telescope system.

[1]  P. G. Kryukov,et al.  High-resolution fiber-fed echelle spectrograph for the 6-m telescope. I. Optical scheme, arrangement, and control system , 2014 .

[2]  Murat Uysal,et al.  Survey on Free Space Optical Communication: A Communication Theory Perspective , 2014, IEEE Communications Surveys & Tutorials.

[3]  Heidar A. Malki,et al.  Control Systems Technology , 2001 .

[4]  Zenghui Wang,et al.  Practical Wind-Disturbance Rejection for Large Deep Space Observatory Antenna , 2014, IEEE Transactions on Control Systems Technology.

[5]  Peter Eisenträger,et al.  Design of the solar telescope GREGOR under dynamic wind loads , 2003, SPIE Optics + Photonics.

[6]  Lorenzo Fagiano,et al.  Comparing Internal Model Control and Sliding-Mode Approaches for Vehicle Yaw Control , 2009, IEEE Transactions on Intelligent Transportation Systems.

[7]  Alexander Koenig,et al.  Multisensor Contour Following With Vision, Force, and Acceleration Sensors for an Industrial Robot , 2013, IEEE Transactions on Instrumentation and Measurement.

[8]  Dongkyoung Chwa,et al.  Nonlinear longitudinal acceleration control of nonminimum phase missiles with actuator dynamics , 2014, IEEE Transactions on Aerospace and Electronic Systems.

[9]  Xiao-jun Jiang,et al.  A general observatory control software framework design for existing small and mid-size telescopes , 2015 .

[10]  S.K. Tso,et al.  Experimental study of contact transition control incorporating joint acceleration feedback , 2000 .

[11]  Z. Sodnik,et al.  Optical Intersatellite Communication , 2010, IEEE Journal of Selected Topics in Quantum Electronics.

[12]  Zongxia Jiao,et al.  Adaptive Robust Control of DC Motors With Extended State Observer , 2014, IEEE Transactions on Industrial Electronics.

[13]  Shuzhi Sam Ge,et al.  Vibration Control of a Nonuniform Wind Turbine Tower via Disturbance Observer , 2015, IEEE/ASME Transactions on Mechatronics.

[14]  Nicolas Gisin,et al.  Quantum communication technology , 2010, 1007.4128.

[15]  Colin D. Simpson,et al.  Industrial Electronics , 1936, Nature.

[16]  Carlos Canudas de Wit,et al.  A new model for control of systems with friction , 1995, IEEE Trans. Autom. Control..

[17]  Jeffrey K. Hollingsworth,et al.  Instrumentation and Measurement , 1998, 2022 International Symposium on Electronics and Telecommunications (ISETC).