Optimal order polynomial motion profile for high-precision flexible scanning platform

LI, Long-hui; ZHANG, Zhi-qi; Guo, Zhen; Luo, Yuanyuan; Zhou, Lianqun; Yao, Jia

doi:10.37188/ope.2021.0099

Cited by 1 publication

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“…The motion form of the moving mirror includes acceleration motion, uniform motion, and deceleration motion. Frequent high-acceleration mutations may cause shocks, which is not conducive to the precise control of the control object [46]. Therefore, in this paper, the seventh-order S-curve is proposed to make the acceleration curve smooth and continuous and reduce the mechanical shock caused by acceleration changes [47].…”

Section: Experimental Verificationmentioning

confidence: 99%

Design of an Optical Path Scanning Control System in a Portable Fourier Transform Spectrometer Based on Adaptive Feedforward–Nonlinear Proportional-Integral Cascade Composite Control

Zhi,

Huang,

Wen

et al. 2024

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In order to obtain highly accurate infrared spectra, the optical path scanning control system in a portable Fourier transform spectrometer (FTS) must be able to realize highly stable reciprocal scanning. To address the positional localization and speed fluctuation problems of optical path scanning control systems, an adaptive feedforward–nonlinear PI cascade composite control algorithm (AF-NLPI) is proposed. A physical model of an optical path scanning control system is established. Moreover, an adaptive feedforward compensator using a dynamic forgetting factor is proposed, and it was combined with a nonlinear PI cascade controller to form a composite controller. The control parameters were tuned using the atomic orbital search algorithm. Further, the simulation and experimental results demonstrate that the AF-NLPI can effectively improve the control accuracy and anti-interference ability of an optical path scanning control system in a portable FTS with high feasibility and practicality. By setting the scanning stroke of the system to 8 mm and scanning at 10 mm/s, the stability of the optical scanning speed reached 99.47% when controlled by the controller proposed in this paper, thus fulfilling the motion requirements for optical path scanning control systems.

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Section: Experimental Verificationmentioning

confidence: 99%