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首页> 外文会议>In: AIAA/CEAS Aeroacoustics Conference and Exhibit, 5th, Bellevue, WA, May 10-12, 1999, Collection of Technical Papers. Vol. 2 (A99-27801 06-71), Reston, VA, American Institute of Aeronautics and Astronautics, 1999 >Investigation of acoustic fields for the Cassini spacecraft - Reverberant versus launch environments
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Investigation of acoustic fields for the Cassini spacecraft - Reverberant versus launch environments

机译：卡西尼号航天器的声场研究-混响与发射环境

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The characterization and understanding of the acoustic field within a launch vehicle's payload fairing (PLF) is critical to the qualification of a spacecraft and ultimately to the success of its mission. ^Acoustic measurements taken recently for the Cassini mission have allowed unique opportunities to advance the aerospace industry's knowledge in this field. ^Prior to its launch, the expected liftoff acoustic environment of the spacecraft was investigated in a full-scale acoustic test of a Titan IV PLF and Cassini simulator in a reverberant test chamber. ^A major goal of this acoustic ground test was to quantify and verify the noise reduction performance of special barrier blankets that were designed especially to reduce the Cassini acoustic environment. ^This paper describes both the ground test and flight measurements and compares the Cassini acoustic environment measured during launch with that measured earlier in the ground test. ^Special emphasis is given to the noise reduction performance of the barrier blankets and to the acoustic coherence measured within the PLF. ^(Author)
机译：运载火箭的有效载荷整流罩（PLF）中的声场的表征和理解对于航天器的鉴定以及最终对其飞行任务的成功至关重要。 ^最近为执行卡西尼号任务而进行的声学测量为提高航空航天业在该领域的知识提供了独特的机会。 ^发射前，在回响测试室内对Titan IV PLF和卡西尼模拟器进行了全面的声学测试，研究了航天器的预期升空声学环境。 ^此声学地面测试的主要目标是量化和验证专门设计用于减少卡西尼号声学环境的特殊阻隔毯的降噪性能。 ^本文同时描述了地面测试和飞行测量，并比较了发射期间测得的卡西尼号声环境与地面测试中较早时测得的声环境。 ^特别强调了隔离毯的降噪性能以及PLF内测得的声学相干性。 ^（作者）

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