Positive deviation control method for reverberation room flat and straight acoustic spectrum

A control method and positive deviation technology, applied in the direction of electrical components, etc., can solve problems such as poor coupling efficiency

Inactive Publication Date: 2012-12-12
SHANGHAI INST OF SATELLITE EQUIP
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  • Abstract
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Problems solved by technology

Coupling is very inefficient and the function of the horn is to maximize that efficiency

Method used

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  • Positive deviation control method for reverberation room flat and straight acoustic spectrum
  • Positive deviation control method for reverberation room flat and straight acoustic spectrum
  • Positive deviation control method for reverberation room flat and straight acoustic spectrum

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Embodiment Construction

[0040] The embodiments of the present invention are described in detail below: the present embodiment is implemented under the premise of the technical solution of the present invention, and detailed implementation and specific operation process are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0041] This embodiment includes the following steps:

[0042] The first step is to analyze the sound spectrum control conditions stipulated in the test program to determine whether it belongs to the category of flat spectrum;

[0043] The second step, if it belongs to, during the system debugging before the test, use the "positive deviation" control method to increase the nominal value of the sound spectrum condition specified in the test program;

[0044] The third step is to reduce the upper and lower tolerances without changing the controlled sound pressure level range;

[0045] The fourth step is to use the hi...

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Abstract

The invention discloses a positive deviation control method for reverberation room flat and straight acoustic spectrum. The method comprises the following steps that 1, the acoustic spectrum control condition specified by a testing schedule is analyzed, and whether the acoustic spectrum control condition specified by the testing schedule belongs to the first type nor not is judged; 2, if the acoustic spectrum control condition specified by the testing schedule belongs to the first type, during the system debugging before the test, the positive deviation control method is adopted for improving the nominal value of the acoustic spectrum control condition specified by a testing schedule; 3, the upper and lower allowed difference is reduced, and the controlled sound pressure level is not changed; 4, air supply pressure is provided by using a high-frequency electric appliance transducer, in addition, the deviation value is continuously modified, and until the empty room debugging, the sound pressure level of the high-frequency section is more than 2dB higher than the control lower line. The method provided by the invention has the advantages that under the condition that the existing configuration of hardware including a laboratory electric transducer, a loudspeaker, a control system and the like is not changed, the satisfactory test results are obtained at lower cost, supplementary checking on satellite high-frequency band applicability through supplementary operation of other tests or the test invalidity caused by ground checking insufficiency are avoided, and the normal appearance of a satellite is ensured.

Description

technical field [0001] The invention relates to the technical field of noise testing of high-orbit satellites, in particular to a positive deviation control method for a flat sound spectrum in a reverberation room. Background technique [0002] During the development, launch and entry into the predetermined space orbit and other life profiles and mission profiles, the satellite mainly experiences three environmental profiles: the ground environment, the launch environment and the space environment. In order to test the environmental adaptability, performance matching, electromagnetic compatibility and reliability of the satellite integrating mechanics, electricity, heat and magnetism, simulation tests should be carried out on the environment experienced by the above three environmental profiles to verify that the satellite can withstand the external environment The adequacy of capability is also to verify whether the reliability design margin is sufficient and reliable, so a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R29/00
Inventor 张利徐俊高英朱国君
Owner SHANGHAI INST OF SATELLITE EQUIP
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