RII Track-4:@NASA: Wind-induced noise in the prospective seismic data measured in the Venusian surface environment

RII Track-4：@NASA：金星表面环境中测量的预期地震数据中的风致噪声

• 批准号: 2327422
• 负责人: Il Sang Ahn
• 金额: $ 30万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-01-15 至 2025-12-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2327422&HistoricalAwards=false
• 关键词: RII; Track; NASA; Wind; induced

During the past 60 years of the nation’s space exploration, landers successfully touched down on the Moon, Mars, asteroid 433 Eros, and the Churyumov–Gerasimenko comet to collect data about their environment, structure, and history. In the future, more landers will be sent to other planetary bodies including Venus and will find themselves in a more hostile environment. While scientists and engineers have vigorously developed technologies for the Venus landers that can survive at a temperature of 450°C, a pressure of 90 bar, and an atmosphere filled with reactive gases, we still face technical challenges such as noise contamination in sensor signals. In particular, wind-induced noise (wind blows on Mars and Venus) in seismic data from seismometers has been a major concern from early Martian missions, and a similar issue is expected to occur in future Venus lander missions. We need reliable noise-cancelling techniques to hear clear seismic signal of Venus, which is a goal of this research. The research is designed to investigate nonlinear dynamic features in media that have natural discontinuities (such as cracks and gaps) under combined wind and seismic vibrations. In the case of nonlinearity in the natural ground of Venus, it is anticipated that the two vibrations can be coupled. The coupling of wind and seismic vibrations can generate significant interaction, which will be observed as wind-induced noises. The primary objective of the research is to acquire high-quality experiment data that can be used as hard evidence of nonlinear dynamic features. In the study of nonlinear dynamics where prediction based on theories usually fails, experimental data that reveal such complex behavior are critically important. Research activities are organized to collect seismic signals from a heat-shielded broadband seismometer on the simulated environment of the Venusian surface in the Venusian atmosphere. The NASA Glenn Research Center (GRC), the host institution, is equipped with the Glenn Extreme Environments Rig, where the Venusian atmospheric conditions can be accurately simulated. GRC is the best place to conduct this research, as it requires high precision simulation and measurement.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

在美国太空探索的过去60年中，Landers成功访问了月球，火星，小行星433 Eros和Churyumov -Gerasimenko，收集了有关其环境，结构和历史的数据。将来，更多的着陆器将被送往包括金星在内的其他行星机构，并将发现自己处于更敌对的环境中。尽管科学家和工程师已经为可以在450°C的温度下生存，90 bar的压力以及充满反应性飞行的大气而大力开发了金星着陆器的技术，但我们仍然面临技术挑战，例如传感器信号中的噪声污染。特别是，来自地震仪的地震数据中的风诱导的噪音（对火星和金星的风吹响）一直是早期火星任务的主要问题，预计未来的维纳斯着陆器任务将发生类似的问题。我们需要可靠的降噪技术来听取金星的清晰地震信号，这是这项研究的目标。该研究旨在研究在风和地震振动中具有自然不连续性（例如裂纹和间隙）的媒体中的非线性动态特征。在金星的自然基础上非线性的情况下，可以预期这两种病毒可以耦合。风和地震振动的耦合会产生显着的相互作用，这将被视为风引起的噪音。该研究的主要目的是获取可用作非线性动态特征的硬证据的高质量实验数据。在基于理论的预测通常失败的非线性动力学的研究中，揭示这种复杂行为的实验数据至关重要。组织的研究活动是在金星大气中的金星表面模拟环境中从热屏宽带地震计中收集地震信号的。主机机构NASA Glenn Research Center（GRC）配备了Glenn Extreme Environments钻机，可以准确模拟Venusian大气条件。 GRC是进行这项研究的最佳场所，因为它需要高精度的模拟和测量。该奖项反映了NSF的法定任务，并通过使用基金会的知识分子优点和更广泛的影响评估标准来评估，被认为是珍贵的支持。