Abstract
According to structural characteristics and measurement needs of tip clearance of turbine engine and other rotating blade device, a leaves lattice model with vector characteristics is established. Based on measurement principle of the capacitive displacement sensor, the tip clearance measurement model is established. The spatial filtering effect and the impact of the tip clearance measurement results caused by blade thickness, sensing zone size, blade rotation speed and signal sampling rate is analyzed. The research results show that there is a minimum requirement about sensing zone size, blade rotation speed and signal sampling rate under the condition of certain blade thickness. The conclusion provides an important theoretical basis for the design of the tip clearance measurement system.
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