Optical implementation of closed-loop controllers for mechatronic systems

Dan S. Necsulescu; Anurag Bhagia

doi:10.1117/12.467253

Abstract

The paper investigates the implementation of closed loop controllers of optomechatronic systems using optical components for signal transmission and control loop implementation. The system used for illustration is a DC position servomotor under state feedback control. The comparison is carried out between electric-electronic implementation and optical implementation for an environment with significant electromagnetic noise. For the optical implementation a photodiode is used for converting analog voltage output from position and velocity sensors into modulated 900 nm light, transmitted over a significant distance by a multi mode glass fiber (MMGF) to a controller implemented with a tunable optical amplifier. As an alternative, attenuators can also be used for controller implementation. The signal from controller is again transmitted 1550 nm MMGF to a photodetector that converts the signal into an analog voltage input to motor driver. Experimental results will illustrate the performance of the proposed optical implementation and advantages vs. electric- electronic implementation using a Lab View platform for data acquisition and display.

Citation Download Citation

Dan S. Necsulescu, Dan S. Necsulescu, Anurag Bhagia, Anurag Bhagia, } "Optical implementation of closed loop controllers for mechatronic systems", Proc. SPIE 4902, Optomechatronic Systems III, (18 October 2002); doi: 10.1117/12.467253; https://doi.org/10.1117/12.467253

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