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Lu, Y, Zhang, S, Hu, W, Qiu, Z, Qiu, Z and Qiu, Y (2024) Distance Measurement and Error Compensation of High-Speed Coaxial Rotor Blades Based on Coded Ultrasonic Ranging. Micromachines, 16 (1). pp. 1-21. ISSN 2072-666X
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Distance Measurement and Error Compensation of High Speed Coaxial Rotor Blades Based on Coded Ultrasonic Ranging.pdf - Published Version Available under License Creative Commons Attribution. Download (6MB) | Preview |
Abstract
Coaxial rotor helicopters have many advantages and have a wide range of civilian and military applications; however, there is a risk of blade collision between the upper and lower rotor blades, and the challenge still exists in balancing rotor parameters and flight control. In this paper, a blade tip distance measurement method based on coded ultrasonic ranging and phase triggering is proposed to tackle this measurement environment and expand the application of ultrasonic ranging in high-speed dynamic measurement. The time of flight (Tof) of coded ultrasonic ranging is calculated by the amplitude threshold improvement method and cross-correlation method, and the sound velocity is compensated by a proposed multi-factor compensation method. The static distance error of coded ranging with different codes are all within ±0.5 mm in the range of 10–1000 mm. The measurement error characteristics under different trigger phases and different rotational speeds are studied, and the error model is fitted by the back-propagation neural network method. After compensation, the vertical distance measurement errors are within ±2 mm in the range of 100–1000 mm under the condition that the rotational speed of the blade is up to 1020 RPM. It also provides a potential solution for other high-speed measurement problems.
| Item Type: | Article |
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| Uncontrolled Keywords: | Bioengineering; 7 Affordable and Clean Energy; 1007 Nanotechnology |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Engineering |
| Publisher: | MDPI AG |
| SWORD Depositor: | A Symplectic |
| Date Deposited: | 08 Jan 2025 15:32 |
| Last Modified: | 08 Jan 2025 15:45 |
| DOI or ID number: | 10.3390/mi16010061 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/25210 |
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