过驱动航天器执行机构容错控制分配策略研究

项目名称： 过驱动航天器执行机构容错控制分配策略研究

项目编号： No.61304149

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 自动化技术、计算机技术

项目作者： 张爱华

作者单位： 渤海大学

项目金额： 24万元

中文摘要： 为保证航天器在轨运行的可靠性，执行机构常采用冗余配置方案。同时，容错控制技术也为延长航天器在轨运行寿命提供了保证。然而，实际系统故障种类繁多、故障的不确定性以及高可靠的容错控制方法成为制约该项技术发展应用的主要难点。本项目以过驱动航天器姿态控制系统为研究对象，对执行机构故障的自主诊断、容错控制进行基础科学研究。具体内容包括：考虑多目标、多约束的冗余执行机构控制分配新方法；基于半监督的执行机构自主故障诊断新策略；综合航天器执行机构故障种类及相关特性，充分考虑航天器执行机构姿态特性、模型不确定性的影响、外部干扰、内部扰动等问题，开展过驱动航天器执行机构容错控制分配新技术、新方法研究，同时，考虑星载能源控制分配的最优处理，分别采用智能控制与控制分配相结合的方法保障过驱动系统的稳定性。该容错控制研究的开展为进一步推动我国航天器姿态控制提供理论基础及技术支持。

中文关键词： 过驱动航天器；姿态控制；容错控制；控制分配；非线性控制

英文摘要： Redundancy configuration of the actuator is the normal scheme to gurantee the spacecraft attitude control system reliability. Moreover,fault tolerant control is another key supporting technologies of spacecraft control system, and provides the reliable technical support to spacecraft attitude control system by achieving fault diagnosis and tolerance. However, a wide range of fault diagnosis, uncertain faults and reliable fault tolerant control methods as the main constraints are the bottleneck to development of practical application. In this research, the over-actuated spacecraft is consided as the research object to carry through fundation scientific research of the actuator fault antonomous diagnosis and fault tolerance. More specifically, the research contents include: considering the multi-objective multi-constraint problem, investigating new control allocation scheme under redundant executing agency; Semi-supervised actuator antonomous fault diagnosis strategy is proposed; a novel autonomous fault tolertant control technique based on control allocation for over-activated spacecraft under actuator fault will be presented by integrating advanced control theory, in which the actuator dynamic characteristics and model uncertainties, will be taken into account. And also the control allocation of the spacecraft e

英文关键词： overactuated spacecraft；attitude control；fault tolerant control；control allocation；nonlinear control