主被动混合虚拟声屏障研究

The existing research on virtual sound barriers has found out that although the virtual sound barrier can create a zone of quiet without blocking light and air, its applications are limited due to the limited effective frequency range. To increase the effective frequency range of a virtual sound barrier, many more sound sources have to be introduced into the system, which increases the complexity and cost of the virtual sound barrier significantly. A novel approach of using both active and passive approaches is proposed in this project to solve the problem, where the specially designed walls or passive partition panels are proposed to be used with the active sound sources in a virtual sound barrier to construct a special boundary and a hybrid virtual sound barrier so that the number of active sound sources to generate or control a special sound field inside the boundary can be reduced. The project will establish a model for hybrid virtual sound barriers, investigate the mechanism and explore the methods of combining the active and passive elements in the hybrid systems. In the mean time, aiming at practical applications, the decentralized architectures, the virtual sensing strategies, the adaptive active noise control algorithms that can minimize the acoustic energy density, and the algorithms for controlling nonperiodic noise or impulsive noise will also be investigated in this project so that a practical new technoledge that are useful in domestic, industry or military can be genearted from the project.

已有研究发现"虚拟声屏障"虽然能够在不阻挡光线和空气流通的前提下在噪声环境中建立一个安静区域，但有效频率范围较低，影响其获得广泛的应用。本项目针对中高频噪声的虚拟声屏障需要配置大量控制声源的问题，提出采用主被动结合的方法来提高现有虚拟声屏障的有效频率范围或者在相同频率下减少所需控制声源的个数，即通过将有源噪声控制的控制声源和若干无源声学隔板间隔布放，或者将控制声源放置在类似墙角的专门设计的声学结构中，主被动结合来达到减少控制声源个数的目的。本项目将建立主被动混合虚拟声屏障的声学模型，探讨其物理机理，研究主被动控制的结合方式；同时以推动虚拟声屏障应用为目标，研究非集中控制结构、虚拟传感器控制策略、最小化声能量密度的自适应有源噪声控制算法和针对非周期噪声或者脉冲声的控制算法，力争使本项目的研究结果形成一项国民经济和国防建设中切实有用的新技术。

本项目针对中高频噪声的虚拟声屏障需要配置大量的控制声源的问题，提出采用主被动结合的方法来提高现有虚拟声屏障的有效频率或者在相同频率下减少所需控制声源的个数，即通过将有源噪声控制的控制声源和若干无源声学隔板间隔布放，或者将控制声源放置在类似墙角的专门设计的声学结构中，主被动结合来达到减少控制声源个数的目的。本项目建立了主被动混合虚拟声屏障的声学模型，探讨了其物理机理，研究了主被动控制的结合方式；研究了非集中控制结构、虚拟传感器控制策略、和相关的控制算法。在国际期刊上发表相关论文30篇，积极参加国际交流，发表国际会议论文30篇，申请发明专利9项，获得授权6项，搭建演示系统2套，针对变压器噪声控制在现场搭建了演示系统，并进行了测试。本项目的系列研究成果有潜力在民用、工业和国防中得到广泛应用。