论文标题
具有空间模型不匹配的封闭轨道反馈系统的性能
Performance of closed orbit feedback systems with spatial model mismatch
论文作者
论文摘要
用于全局轨道校正的封闭轨道反馈（COFB）系统依赖于轨道响应矩阵（ORM）的伪内。控制器中使用的模型ORM与实际机器ORM之间的不匹配可能会影响反馈系统的性能。在本文中，在模拟研究中考虑了此类模型不匹配的典型来源，例如加速度ORM变异，强度依赖性调动和β击败。研究了COFB系统操作的慢速和快速制度，研究了它们对性能和稳定利润率的影响。使用光谱半径稳定性条件，而不是较小的增益定理，以达到COFB稳定性的理论限制，并与GSI的SIS18进行了比较，并在凉爽的同步加速器（COZY）（forschungzentrumjülich（FZJ）中）进行了实验。
Closed orbit feedback (COFB) systems used for the global orbit correction rely on the pseudo-inversion of the orbit response matrix (ORM). A mismatch between the model ORM used in the controller and the actual machine ORM can affect the performance of the feedback system. In this paper, the typical sources of such model mismatch such as acceleration ramp ORM variation, intensity-dependent tune shift and beta beating are considered in simulation studies. Their effect on the performance and the stability margins are investigated for both the slow and fast regimes of a COFB system operation. The spectral radius stability condition is utilized instead of the small gain theorem to arrive at the theoretical limits of COFB stability and comparisons with simulations for SIS18 of GSI and experiments at the Cooler synchrotron (COSY) in the Forschungzentrum Jülich (FZJ) are also presented.
