Distance Measurement and Error Compensation of High-Speed Coaxial Rotor Blades Based on Coded Ultrasonic Ranging
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 ti...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-12-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/16/1/61 |
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| author | Yaohuan Lu Shan Zhang Wenchuan Hu Zhen Qiu Zurong Qiu Yongqiang Qiu |
| author_facet | Yaohuan Lu Shan Zhang Wenchuan Hu Zhen Qiu Zurong Qiu Yongqiang Qiu |
| author_sort | Yaohuan Lu |
| collection | DOAJ |
| description | 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 (<i>Tof</i>) 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. |
| format | Article |
| id | doaj-art-d955f94a5aa64768ae2316b7a823f945 |
| institution | Kabale University |
| issn | 2072-666X |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
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| series | Micromachines |
| spelling | doaj-art-d955f94a5aa64768ae2316b7a823f9452025-01-24T13:41:59ZengMDPI AGMicromachines2072-666X2024-12-011616110.3390/mi16010061Distance Measurement and Error Compensation of High-Speed Coaxial Rotor Blades Based on Coded Ultrasonic RangingYaohuan Lu0Shan Zhang1Wenchuan Hu2Zhen Qiu3Zurong Qiu4Yongqiang Qiu5State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, ChinaState Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, ChinaCollege of Mechanical Engineering, Tianjin University of Technology and Education, Tianjin 300355, ChinaSchool of Engineering, University of Bolton, Bolton BL3 5AB, UKState Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, ChinaSchool of Engineering, Liverpool John Moores University, Liverpool L3 3AF, UKCoaxial 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 (<i>Tof</i>) 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.https://www.mdpi.com/2072-666X/16/1/61blade tip distancecoded ultrasonic rangingdynamic measurementerror compensation |
| spellingShingle | Yaohuan Lu Shan Zhang Wenchuan Hu Zhen Qiu Zurong Qiu Yongqiang Qiu Distance Measurement and Error Compensation of High-Speed Coaxial Rotor Blades Based on Coded Ultrasonic Ranging Micromachines blade tip distance coded ultrasonic ranging dynamic measurement error compensation |
| title | Distance Measurement and Error Compensation of High-Speed Coaxial Rotor Blades Based on Coded Ultrasonic Ranging |
| title_full | Distance Measurement and Error Compensation of High-Speed Coaxial Rotor Blades Based on Coded Ultrasonic Ranging |
| title_fullStr | Distance Measurement and Error Compensation of High-Speed Coaxial Rotor Blades Based on Coded Ultrasonic Ranging |
| title_full_unstemmed | Distance Measurement and Error Compensation of High-Speed Coaxial Rotor Blades Based on Coded Ultrasonic Ranging |
| title_short | Distance Measurement and Error Compensation of High-Speed Coaxial Rotor Blades Based on Coded Ultrasonic Ranging |
| title_sort | distance measurement and error compensation of high speed coaxial rotor blades based on coded ultrasonic ranging |
| topic | blade tip distance coded ultrasonic ranging dynamic measurement error compensation |
| url | https://www.mdpi.com/2072-666X/16/1/61 |
| work_keys_str_mv | AT yaohuanlu distancemeasurementanderrorcompensationofhighspeedcoaxialrotorbladesbasedoncodedultrasonicranging AT shanzhang distancemeasurementanderrorcompensationofhighspeedcoaxialrotorbladesbasedoncodedultrasonicranging AT wenchuanhu distancemeasurementanderrorcompensationofhighspeedcoaxialrotorbladesbasedoncodedultrasonicranging AT zhenqiu distancemeasurementanderrorcompensationofhighspeedcoaxialrotorbladesbasedoncodedultrasonicranging AT zurongqiu distancemeasurementanderrorcompensationofhighspeedcoaxialrotorbladesbasedoncodedultrasonicranging AT yongqiangqiu distancemeasurementanderrorcompensationofhighspeedcoaxialrotorbladesbasedoncodedultrasonicranging |