High-precision synchronization control of piezoelectric actuators for space-based fabry-perot spectrometer

MPB Communications Inc.加拿大气象局正在开发用于小型卫星的高分辨率法布里-珀罗成像光谱仪，以便为大气科学研究提供二维多光谱绘图。这种法布里-珀罗光谱仪技术也可以应用于各种地面和空间应用。MPBC的Fabry-Perot光谱仪采用一组压电致动器，通过选择纳米级特殊可调谐滤光器的差距间距，提供所需光信号透射率的光谱调谐。这允许波长扫描步长是软件可编程的，以满足各种光谱分辨率要求。压电驱动器是MPBC法布里-珀罗光谱仪的关键元件。然而，压电陶瓷驱动器固有的非线性，如迟滞、蠕变、动态效应、机械振动和温度变化引起的漂移，限制了其定位精度和响应速度，并限制了其应用，通过本合作项目，我们旨在推进压电驱动器动力学建模和控制系统设计的一些关键技术。这些进步将有望大大提高MPBC的2-D法布里-珀罗成像光谱仪的性能，并使其能够在未来的太空任务中应用。这个拟议的项目也将是完美的学术机构，因为它结合了工程与科学，并将作为一个优秀的平台，为加拿大培养高素质的人才。

MPB Communications Inc. (MPBC) is developing high-resolution Fabry-Perot imaging spectrometer for small satellite application to provide 2-D multispectral mappings for atmospheric science studies. This Fabry-Perot spectrometer technology can also be applied to diverse terrestrial and space applications. MPBC's Fabry-Perot spectrometer employs a set of piezoelectric actuators to provide spectral tuning of the desired optical signal transmittance by selecting the gap spacing of a special tunable optical filter at nanometer level. This allows the wavelength scan step size to be software programmable to meet various spectral resolution requirements. By tuning the optical filter, a multispectral or hyperspectral scan can be obtained.Piezoelectric actuators are the key elements for MPBC's Fabry-Perot spectrometer. However, the inherent nonlinearities such as hysteresis, creep, dynamic effect, drifts due to mechanical vibration and temperature change limit the positioning accuracy and response speed of a piezoelectric actuator, and its application.Through this collaborative project, we aim to advance some key technologies in dynamics modelling and control system design for piezoelectric actuators. These advancements will be expected to greatly improve the performance of MPBC's 2-D Fabry-Perot imaging spectrometer and enable its application in future space missions. This proposed project will also be perfect for the academic institution since it combines engineering with science, and will serve as an excellent platform for the training of highly qualified personnel for Canada.