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

MPB Communications Inc.(MpBC)正在开发用于小卫星应用的高分辨率法布里-珀罗成像光谱仪，为大气科学研究提供二维多光谱测绘。这种法布里-珀罗光谱仪技术还可以应用于各种地面和空间应用。MpBC的法布里-珀罗光谱仪采用一组压电致动器，通过选择纳米级特殊可调滤光器的间隙来提供所需光学信号透过率的光谱调谐。这使得波长扫描步长可以通过软件编程来满足各种光谱分辨率要求。通过调谐滤光片，可以实现多光谱或高光谱扫描。压电驱动器是MPBC法布里-珀罗光谱仪的关键元件。然而，由于固有的非线性，如迟滞、蠕变、动态效应、机械振动和温度变化引起的漂移等，限制了压电致动器的定位精度和响应速度，并限制了其应用。这些进展预计将极大地提高MPBC的二维法布里-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学术机构的完美选择，因为它将工程和科学结合在一起，并将成为加拿大培训高素质人才的极好平台。

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.