论文标题
事件触发的间歇性绩效控制航天器态度重新定位
Event-Triggered Intermittent Prescribed Performance Control for Spacecraft Attitude Reorientation
论文作者
论文摘要
本文重点介绍了如何以确保性能来实现航天器态度控制的问题，同时显着降低了执行器的作用频率。规定的性能控制（PPC）方案通常用于保证绩效。但是，从连续系统的角度设计了常规的PPC控制器，这与实际航天器控制系统中的“离散”控制逻辑相矛盾，并且此问题限制了PPC方案在实际应用程序中的应用值。为了显着降低执行器的作用频率，同时仍保持所需的性能，为此问题提出了复合事件触发机制，关闭执行器并在适当条件下消除了不必要的控制输出。此外，提出的复合事件触发机制与规定的性能控制方案结合使用，构建了一个完整的控制器结构，以解决提出的问题。同时，特殊的性能函数旨在提供温和的过渡过程。基于建议的方案，特定的后替态控制器进一步开发为验证。最后，提出了数值仿真结果，以验证所提出的方案的有效性。
This paper focuses on the issue of how to realize spacecraft attitude control with guaranteed performance while conspicuously reducing the actuator acting frequency simultaneously. The prescribed performance control (PPC) scheme is often employed for the control with guaranteed performance. However, conventional PPC controllers are designed from the perspective of continuous system, which contradicts the "discrete" control logic in actual spacecraft control system, and such a problem limited the application value of PPC scheme in actual applications. In order to significantly lower the actuator acting frequency while still maintaining the desired performance, a composite event-trigger mechanism is proposed for this issue, turning off the actuator and eliminating unnecessary control output under appropriate conditions. Further, the proposed composite event-trigger mechanism is combined with a prescribed performance control scheme, constructing a complete controller structure for solving the presented issue. Meanwhile, a special performance function is designed to provide mild transition process. Based on the proposed scheme, a specific backstepping controller is further developed as a validation. Finally, numerical simulation results are presented to validate the effectiveness of the proposed scheme.
