Reaction wheel Parameter Identification

Microsat Systems Canada Inc.（以下简称“MSCI”）是一家位于安大略省密西沙加的加拿大私人控股公司。在过去的二十年中，MSCI是加拿大世界知名的微型卫星制造商，在姿态控制系统（ACS）设计，ACS传感器和执行器方面拥有全球业绩。特别是MSCI的反作用轮——ACS执行器套件的关键部件——已经发射并在轨道上运行，积累了超过216年的飞行历史和580亿转无故障[1]。我们在约克大学的研究团队正提议扩展我们目前的ACS研究，以检查反应轮参数识别，并对MSCI的反应轮特别感兴趣。我们提出了一种新的方法来表征反作用轮的性能，并估计反作用轮转子的转动惯量，这是提供更高精度姿态控制的关键参数。拟议的研究直接支持MSCI目前改善制造和测试其反应轮的努力。我们的目标是提供可靠和具有成本效益的方法来更好地评估车轮的性能，并就制造此类商业产品节省成本的方法提供建议。虽然我们在开发先进的确定和控制算法方面取得了重大进展，这些算法旨在补偿姿态控制硬件中的不确定性，但在传感器和执行器建模方面仍然存在重大差距。例如，在小型航天器上，为了达到弧秒级的指向精度，仍然需要高保真的作动器模型和作动器参数估计。本研究的贡献在于为姿态作动器的建模提供了新颖可靠的方法。特别是，我们建议开发一种方法来模拟反作用轮，并估计其关键的不可测量参数。

Microsat Systems Canada Inc. (referred to as 'MSCI hereinafter) is a privately held Canadian corporation basedin Mississauga, Ontario. MSCI is a world-renowned premiere builder of microsatellites in Canada over the pasttwo decades with worldwide track record in attitude control system (ACS) design, ACS sensors and actuators.In particular, MSCI's reaction wheels - critical component in ACS actuator suite - have been launched and areoperational in orbit, with over 216 years of accumulated flight heritage and 58 billion revolutions withoutfailure [1]. Our research team at York University is proposing to extend our current ACS research to examinereaction wheel parameter identification with special interest in MSCI's reaction wheels. We propose to developa novel method to characterize the wheels' performance and estimate the moment of inertia of the reactionwheel's rotor, which is considered a key parameter in providing a higher accuracy attitude control. Theproposed research is in direct support of MSCI's current efforts to improve the manufacturing and testing theirreaction wheels. We aim to provide reliable and cost-effective means to better evaluate the wheels'performance and advice on cost-saving methods for manufacturing of such commercial products.While we have made significant progress towards developing advanced determination and control algorithmsdesigned to compensate for uncertainty in attitude control hardware, there still exist significant gap in sensorand actuator modeling. For example, there is still a great need for high-fidelity actuator model and estimationof actuator parameters to achieve arc-second level pointing accuracy on small spacecraft. The contribution ofthis study is in developing novel and reliable ways to model attitude actuator. In particular, we propose todevelop a methodology for modeling reaction wheels and estimate their key immeasurable parameters.