The trim balance system can adjust the navigation attitude of unmanned underwater vehicles,en-suring safe and reliable navigation.Based on the existing research,this paper designed and built a test bench,and conducted tests from three aspects:the pressure characteristics of the trim balance system pipeline,the pipeline wrapping material,and the installation of an accumulator in the pipeline.The test data shows that the maximum fluc-tuation of pipeline pressure is approximately linearly related to the initial value of water regulating pressure,with a water hammer impact pressure fluctuation time of about 0.2 seconds;the wrapping of damping materials on the pipe-line and the installation of an accumulator can effectively suppress pipeline vibration.The two suppression methods can reduce the pressure amplitude by up to 32.8%.
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