High Precision Robust Automatic Alignment Method for Rotating Shaft

Luo, Jun; Wang, Zhiqian; Shen, Chengde; Liu, Shaojin; Zheng, Wen

doi:10.1007/s12647-016-0178-0

Cited by 2 publications

(4 citation statements)

References 18 publications

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“…In practice, we usually align this angle to a very small value. The details of shaft misalignment angle calculation and alignment process refer to [ 35 ].…”

Section: Estimate Azimuth Uncertaintymentioning

confidence: 99%

“…In order to achieve high precision azimuth result, it is essential to measure the shaft misalignment angle η between the practical shaft OR 1 and the vertical shaft OR, and to adjust the practical shaft to a vertical state. The shaft misalignment angle measurement procedure includes two steps using the inclinometer in our system [ 35 ]. Firstly, the inclinometer outputs are obtained at position 1, and

indicate the inclinometer X+ axis and the Y+ axis outputs respectively.…”

Section: Implementation Of a High Precision Robust Gyro North Findmentioning

confidence: 99%

“…The resolution of the inclinometer in our experiment is 0.0005

(NS-5/P2), and the standard deviation of the shaft alignment angle reaches at 0.001

. Using the approaches in [ 35 ], a shaft alignment precision of 0.003

is achieved.…”

Section: Implementation Of a High Precision Robust Gyro North Findmentioning

confidence: 99%

See 2 more Smart Citations

Modeling and Implementation of Multi-Position Non-Continuous Rotation Gyroscope North Finder

Luo

Wang

Shen

et al. 2016

Sensors

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Even when the Global Positioning System (GPS) signal is blocked, a rate gyroscope (gyro) north finder is capable of providing the required azimuth reference information to a certain extent. In order to measure the azimuth between the observer and the north direction very accurately, we propose a multi-position non-continuous rotation gyro north finding scheme. Our new generalized mathematical model analyzes the elements that affect the azimuth measurement precision and can thus provide high precision azimuth reference information. Based on the gyro’s principle of detecting a projection of the earth rotation rate on its sensitive axis and the proposed north finding scheme, we are able to deduct an accurate mathematical model of the gyro outputs against azimuth with the gyro and shaft misalignments. Combining the gyro outputs model and the theory of propagation of uncertainty, some approaches to optimize north finding are provided, including reducing the gyro bias error, constraining the gyro random error, increasing the number of rotation points, improving rotation angle measurement precision, decreasing the gyro and the shaft misalignment angles. According them, a north finder setup is built and the azimuth uncertainty of 18” is obtained. This paper provides systematic theory for analyzing the details of the gyro north finder scheme from simulation to implementation. The proposed theory can guide both applied researchers in academia and advanced practitioners in industry for designing high precision robust north finder based on different types of rate gyroscopes.

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“…In practice, we usually align this angle to a very small value. The details of shaft misalignment angle calculation and alignment process refer to [ 35 ].…”

Section: Estimate Azimuth Uncertaintymentioning

confidence: 99%

indicate the inclinometer X+ axis and the Y+ axis outputs respectively.…”

Section: Implementation Of a High Precision Robust Gyro North Findmentioning

confidence: 99%

See 1 more Smart Citation

Modeling and Implementation of Multi-Position Non-Continuous Rotation Gyroscope North Finder

Luo

Wang

Shen

et al. 2016

Sensors

Self Cite

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“…The alignment procedure is a basic step in the proper performance of many systems (Fu et al 2020, Luo et al 2016, Liu et al 2018, Wu et al 2011. The north alignment plays a crucial role in the operation of many applications such as positioners, antenna pedestals (Debruin 2008), rotating systems, etc.…”

Section: Introductionmentioning

confidence: 99%

North alignment of multi-rotating systems using a known fixed point

Yadegar

Karami

2022

Eng. Res. Express

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This article deals with multi-rotating systems cooperation and their measurements exchange. We investigate the geographic north alignment in rotating systems such as antenna pedestals, positioners, etcEach system contains some angular position sensors that make measurements based on their local zero angles. These measurements cannot be used by other systems. Therefore, the alignment of these rotating systems with respect to the common angle is necessary, such that all measurements are made based on this common angle. In this paper, we introduce a method for the north alignment considering a known fixed point. For this purpose, we propose an efficient approach for finding the angle between the north direction and the zero angle of these systems. Both the spherical and ellipsoidal Earth models are considered. The results accuracy is also analyzed and the effect of each rotation axis not being perpendicular to the Earth surface is investigated. The proposed approach is shown to be extremely accurate while being simple. Finally, the significance of the proposed approach is validated through several experiments.

show abstract

High Precision Robust Automatic Alignment Method for Rotating Shaft

Cited by 2 publications

References 18 publications

Modeling and Implementation of Multi-Position Non-Continuous Rotation Gyroscope North Finder

Modeling and Implementation of Multi-Position Non-Continuous Rotation Gyroscope North Finder

North alignment of multi-rotating systems using a known fixed point

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