Impact of Including Electronics Design on Design of Intelligent Structures: Applications to Multifunctional Structures for Attitude Control (MSAC)
Impact of Including Electronics Design on Design of Intelligent Structures: Applications to Multifunctional Structures for Attitude Control (MSAC)
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DOI：
10.1115/smasis2020-2331
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发表时间：
2020-09
期刊：
影响因子：
--
通讯作者：
Vedant;James T. Allison
中科院分区：
文献类型：
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作者：
Vedant;James T. Allison
多功能姿态控制结构（MSAC）是一种新型的航天器姿态控制系统，它利用可展翼板作为多功能智能结构，实现精确指向和大回转的姿态控制。先前的研究介绍了MSAC的设计和操作概念，基于仿真的设计研究，以及简化原型的硬件在环（HIL）验证。在这篇文章中，我们扩大了设计研究的范围，包括个人顺应压电致动器和相关的电力电子。这一进步是迈向高保真MSAC系统操作的一步，并揭示了进一步增强性能的新设计见解。致动器的设计使用伪刚体动力学模型（PRBDM），并验证了稳态和阶跃响应对有限元分析。驱动电子模型由几个不同的拓扑结构组成，这些拓扑结构将用于评估给定机械和控制系统设计的系统性能。随后，高保真多物理场多体MSAC系统模型，验证符合致动器和驱动电子的基础上，开发支持实施MSAC控制协同设计优化研究。该模型将用于演示在最优控制协同设计域中包括电力电子设计的影响。不同的控制轨迹的转换率和振动抖动引入卫星进行比较。这项工作的结果将被用来实现闭环控制轨迹，具有最小的抖动引入，同时提供高的转换速率。
Multifunctional Structures for Attitude Control (MSAC) is a new spacecraft attitude control system that utilizes deployable panels as multifunctional intelligent structures to provide both fine pointing and large slew attitude control. Previous studies introduced MSAC design and operation concepts, simulation-based design studies, and Hardware-in-the-Loop (HIL) validation of a simplified prototype. In this article, we expand the scope of design studies to include individual compliant piezo-electric actuators and associated power electronics. This advance is a step toward high-fidelity MSAC system operation, and reveals new design insights for further performance enhancement. Actuators are designed using pseudo rigid body dynamic models (PRBDMs), and are validated for steady-state and step responses against Finite Element Analysis. The drive electronics model consists of a few distinct topologies that will be used to evaluate system performance for given mechanical and control system designs. Subsequently, a high-fidelity multiphysics multibody MSAC system model, based on the validated compliant actuators and drive electronics, is developed to support implementation of MSAC Control Co-design optimization studies. This model will be used to demonstrate the impact of including the power electronics design in the Optimal Control Co-Design domain. The different control trajectories are compared for slew rates and the vibrational jitter introduced to the satellite. The results from this work will be used to realize closed-loop control trajectories that have minimal jitter introduction while providing high slew rates.