头部追踪分辨率对局部主动噪声控制头托系统稳定性和性能的影响
Chung Kwan Lai1, Jordan Cheer1, Chuang Shi1
1Institute of Sound and Vibration Research, University of Southampton, Southampton SO17 1BJ, United Kingdom.
The Journal of the Acoustical Society of America
|February 5, 2025
概括
活动噪音控制头靠的头跟踪通过动态更新系统模型来改善降噪. 然而,有限的跟踪分辨率可能会导致不稳定,特别是在更高的频率,影响性能.
科学领域:
- 声学 声学 在声学方面
- 控制系统工程 控制系统工程
- 信号处理 信号处理
背景情况:
- 主动噪声控制 (ANC) 头托使用植物模型来降低噪声.
- 头部运动引入模型不匹配,降低ANC性能.
- 头部跟踪通过启用动态模型更新来增强ANC.
研究的目的:
- 调查头部跟踪分辨率对ANC头靠稳定性和性能的影响.
- 分析跟踪精度与控制系统行为之间的关系.
- 确定翻译和旋转头部运动如何影响系统稳定性.
主要方法:
- 模拟了一个主动的头托系统与头部跟踪.
- 多种各样的头部跟踪分辨率,考虑到转移和旋转运动.
- 假设存在错误信号在用户的耳朵,以进行自适应控制.
主要成果:
- 有限的头部跟踪分辨率引入错误,影响稳定性和性能.
- 确定了控制器稳定性的频率上限.
- 这个频率限制受到跟踪分辨率,头部位置和运动类型的影响.
结论:
- 头部跟踪分辨率对于保持ANC头托的稳定性至关重要.
- 在跟踪准确性,系统复杂性和性能之间存在权衡.
- 了解这些因素对于设计强大的ANC头靠系统至关重要.
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