Abstract
This paper presents an improved two-point real-time measuring method for radial micro-displacement measurement on a high-speed smart boring bar, which is applied for high-precision boring of non-cylindrical pinholes on pistons. The two-point measuring scheme consists of two orthogonal displacement sensors and an angle encoder. This method is compared with existing two-point measuring method in mathematical model and calculation process, and results show that the improved method is more simple and efficient. Error analysis and simulations are performed, and experimental results indicate that the improved two-point measuring algorithm has a better real-time performance and ensures the measuring accuracy, which meets the radial micro-displacement real-time closed-loop feedback control requirements for the smart boring bar in high-speed rotation.
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