论文部分内容阅读
对噪声主动控制系统的研究概况及其发展趋势作一综述。首先讨论了非因果ANC系统的研究情况，说明了非因果系统的研究是自适应ANC系统研究的基础。然后，从自适应控制的角度出发，讨论了前馈、反馈、复合结构等不同降噪结构各自的特点及优缺点。最后，着重介绍H∞鲁棒控制理论在ANC系统的运用。鲁棒控制系统在设计阶段，考虑了反馈通道对系统性能的影响，所以鲁棒非适应性ANC系统在满足闭环传递特性稳定的前提下，能够满足系统特性的指标。
The research overview of noise active control system and its development trend are reviewed. Firstly, the research on non-causal ANC system is discussed, and the research on non-causal system is the basis of adaptive ANC system. Then, from the perspective of adaptive control, the characteristics, advantages and disadvantages of different noise reduction structures such as feedforward, feedback and composite structures are discussed. Finally, the emphasis is put on the application of H∞ robust control theory in ANC system. Robust control system considers the influence of feedback channel on the system performance in the design stage. Therefore, the robust non-adaptive ANC system can meet the requirements of system characteristics under the premise of stable closed-loop transmission characteristics.