基于结构表面声压的自适应有源声吸收控制研究

研究了实际系统中有源声吸收自适应控制方案。首先提出三种控制准则：反射声功率最小、弹性板表面声压平方和最小及有限点声压平方和最小；然后根据求声功率的近场方法、求耦合声波／振动方程的声弹性理论及无约束最优化技术，推导了三种准则下声吸收的计算公式；最后通过仿真实例，研究了采用不同准则时，次级力源与监测传感器个数和位置对吸声效果的影响

Adaptive Active Control of Sound Absorption Based on the Sound Pressure on the Active Structure Surface

An adaptive control approach applied to practical active sound absorption systems is presented. Firstly,three kinds of control strategies i.e, minimization of the total reflected sound power, minimization of the squared sound pressures surface, minimization of squared sound pressure at discrete locations on the active structure surface are given. Then based on the near field approach, acoustoelastic theory and unconstrained optimization technique, formulae of calculating sound absorption are analytically derived. Finally, under three criteria effects of number and location of secondary force sources and monitoring sensors on sound absorption are investigated.