Melchionni Dario, Magnani Alessandro, Pesatori Alessandro, Norgia Michele
Appl Opt. 2015 Nov 10;54(32):9637-43. doi: 10.1364/AO.54.009637.
The closed-loop technique has been demonstrated as a possible configuration to design a vibrometer based upon self-mixing interferometry. The electronic feedback loop allows a better linearity while extending the linearity range of a self-mixing interferometer. A deep analysis of the feedback loop is carried out in order to improve stability and performance through a digital approach. This work describes first the simulation of the closed-loop vibrometer, and then the performance obtained through its implementation on an FPGA based prototype.
闭环技术已被证明是一种基于自混合干涉测量法设计振动计的可能配置。电子反馈回路在扩展自混合干涉仪线性范围的同时，能实现更好的线性度。为了通过数字方法提高稳定性和性能，对反馈回路进行了深入分析。这项工作首先描述了闭环振动计的仿真，然后介绍了在基于现场可编程门阵列（FPGA）的原型上实现该振动计所获得的性能。
