Experimental vs Simulation Study Analysis on Active Noise Control System Using Distance Variations at 2000 rpm Engine Speed

The Active Noise Control System is carried out by measuring variations in the measuring distance. The method used in the research used the spherical method. The aim of the research is to obtain noise reduction that propagates in the circle. The Active Noise Control device used functions to reduce noise from noise sources. This tool is a self-designed device consisting of 6 units which function to produce sound to counteract noise originating from the source. The source of noise in this research is the USU Generation III NVC Unmanned Aircraft with a 2-stroke engine with the DLE Gas Engine-30 series which is placed in a spherical flashlight position. Tests to obtain data were carried out experimentally and by simulation with the aim of obtaining reductions based on variations in measuring distance and were only measured at 2000 rpm. The measurement settings for the experimental technique are by determining the position of the noise suppressor (loudspeaker) and sound sensor (microphone). The loudspeaker is placed on a spherical X, Y, Z axis which is placed at a distance of 1.25 m from the USU Generation III NVC Unmanned Aircraft engine, the position of the microphone is at a 45° inclination between each axis and a distance of 0.75 m from the position of the aircraft engine. Measurements were carried out on the X+, The 1-x Series Active Noise Control Device works to reduce noise. The reduction results achieved in the comparison of experimental tests vs simulation results were based on variations in measuring distance at 2000 rpm and the value obtained was a comparison of the error value at the highest value = 0.94 and the lowest value = 0.79. So from the comparison of these error values it can be concluded that a maximum reduction in simulation results was obtained.