A robust hybrid tracking controller for a nonlinear resonating fiber microscanner is developed and implemented to remove scan distortions—toroid and swirl. Using offline batch feedback, a nonlinear search, and simulated regulation, an adaptive controller iteratively finds system parameters that cause an online open-loop feedback linearized plant-inversion controller to robustly and accurately track a spiral scan with a high-speed flyback region. This offline adaptive feedback/online open-loop hybrid approach removes the need for miniature sensors and high-speed real-time controllers in situ.

1.
Seibel
,
E. J.
, and
Smithwick
,
Q. Y. J.
, 2002, “
Unique Features of Optical Scanning, Single Fiber Endoscopy
,”
Lasers Surg. Med.
0196-8092,
30
(
3
), pp.
177
183
.
2.
Seibel
,
E. J.
,
Johnston
,
R. S.
, and
Melville
,
C. D.
, 2006, “
A Full Color Scanning Fiber Endoscope
,”
Proc. SPIE
0277-786X,
6083
, pp.
9
16
.
3.
Smithwick
,
Q. Y. J.
,
Reinhall
,
P.
,
Vagners
,
J.
, and
Seibel
,
E. J.
, 2004, “
Nonlinear State Space Model of a Resonating Fiber: Theory and Experiment
,”
ASME J. Dyn. Syst., Meas., Control
0022-0434,
126
(
1
), pp.
88
101
.
4.
Smithwick
,
Q. Y. J.
,
Vagners
,
J.
,
Reinhall
,
P.
, and
Seibel
,
E. J.
, 2006, “
An Error Space Controller for a Resonating Fiber Scanner: Simulation and Implementation
,”
ASME J. Dyn. Syst., Meas., Control
0022-0434,
128
(
4
), pp.
899
913
.
5.
Crespo da Silva
,
M. R. M.
, and
Glynn
,
C. C.
, 1978, “
Nonlinear Flexural-Flexural Torsional Dynamics of Inextensional Beams I & II
,”
J. Struct. Mech
,
6
(
4
), pp.
437
461
.
6.
Slotine
,
J. J. E.
, and
Li
,
W. P.
, 1991,
Applied Nonlinear Control
,
Prentice-Hall
,
Englewood Cliffs, NJ
.
7.
Smithwick
,
Q. Y. J.
,
Seibel
,
E. J.
,
Reinhall
,
P.
, and
Vagners
,
J.
, 2001, “
Control Aspects of the Scanning Single Fiber Flexible Endoscope
,”
Proc. SPIE
0277-786X,
4253
, pp.
176
188
.
9.
Gorinevsky
,
D.
, 2002, “
Loop-Shaping for Iterative Control of Batch Processes
,”
IEEE Control Syst. Mag.
0272-1708,
22
(
6
), pp.
55
65
.
10.
Dennis
,
J.
, 1996,
Numerical Methods for Unconstrained Optimization and Nonlinear Equations
,
SIAM
,
Philadelphia, PA
.
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