Correlation of coordinate transformation parameters

Du, Lan; Zhang, Hanwei; Zhou, Qingyong; Wang, Ruopu

doi:10.3724/sp.j.1246.2012.00034

Cited by 7 publications

(4 citation statements)

References 3 publications

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“…Coordinate transformation decoupling is achieved by introducing virtual power or voltage and frequency, but the output power is still coupled due to small work angle constraints [5]. The article is based on the overall adjustment of the four parameters of the plane coordinate transformation of the inverse solution plane of the common point position [6]. The pathological method matrix may occur due to the dimensional problem, so the generation mechanism of pathology is analyzed, and the solution parameters are decoupled by the center of gravity transformation of the original point [6].…”

Section: Classification Of Power Decouplingmentioning

confidence: 99%

“…The article is based on the overall adjustment of the four parameters of the plane coordinate transformation of the inverse solution plane of the common point position [6]. The pathological method matrix may occur due to the dimensional problem, so the generation mechanism of pathology is analyzed, and the solution parameters are decoupled by the center of gravity transformation of the original point [6]. The feed-forward compensation decoupling algorithm eliminates the coupling by introducing feed-forward compensation by the relative gain method, but only in the quasi-steady-state model.…”

Section: Classification Of Power Decouplingmentioning

confidence: 99%

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The Scope of Application of Power Decoupling Technology and Its Evolution

Zhang

2024

HSET

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As energy consumption worldwide continues to escalate, the gap between energy supply and demand is becoming alarmingly evident. This disparity, combined with the mounting environmental threats impacting production and human existence, intensifies the energy challenges our nation confronts. At the heart of addressing these issues is the imperative to maximize energy efficiency. Within the realm of power electronics, the topic of power decoupling has emerged as a pivotal area of research. This paper delves into the application of power decoupling in power electronics, offering a comprehensive analysis of its characteristics and applicability. Tracing its evolutionary trajectory, the paper systematically explores the historical progression of power decoupling technology. It further segments the technology, elucidating its merits, limitations, and mechanisms for enhancement. By aggregating data, the study categorizes various inverters and contrasts their roles in the domain of power decoupling. Subsequently, the discourse distinguishes between active and reactive power decoupling, providing prevalent examples of the former. The paper concludes by affirming the trajectory of power decoupling towards increased cleanliness and efficiency. The emphasis on high-precision and high-efficiency apparatuses heralds the anticipated future direction of this field.

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Section: Classification Of Power Decouplingmentioning

confidence: 99%

Section: Classification Of Power Decouplingmentioning

confidence: 99%

The Scope of Application of Power Decoupling Technology and Its Evolution

Zhang

2024

HSET

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“…The other way is the 'RS' permutation in which S is applied before R, favoured by Andrei (2006) and Fan (2009). The SR affine transformation formula is as follows:…”

Section: Coordinate Frame (Cf) Rotationsmentioning

confidence: 99%

Derivation of 9-parameter affine 3D geodetic datum transformations

Ruffhead

2022

Survey Review

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This paper proposes a new method of deriving 9-parameter affine 3D datum transformations by ordinary least-squares. Unlike previous methods, it covers all versions of the transformation. Initially, an 'average' scale factor is computed by distance analysis. Removing the scaling effect, the 'RIGOPT' subroutine is applied to optimise the rigid transformation that consists of 3 translations and 3 rotations. Using an equivalent-enlargement hypothesis, the number of scale factors is increased to 3 by a short series of single-search-direction optimisations. The minimisation of residuals is verified by enclosing-interval analysis. The case studies cover datasets in Western Australia, Great Britain and Sweden.

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“…where ( , , ) represent the common point coordinates used in transformation, ( , , ) represent the centroid of the common point coordinates, and ( ̅ , ̅ , ̅) represent the deviation amounts from the centroid (Gullu et al 2003, Lan et al 2012. If the Eq.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Comparative Analysis of Least-squares Approaches for 3D Datum Transformation in Western Turkey

Güllü¹,

Yılmaz²,

Baybura³

2017

AKU-J. Sci. Eng.

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In Turkey, the national reference frame was changed for geodetic applications in parallel with the increasing use of Global Navigation Satellite System technology. Due to the reference frame change, the three-dimensional (3D) datum transformation has become compulsory between ED50 and WGS84. Several 3D datum transformation algorithms have been developed for geodetic applications. The wellknown technique is the Least-Squares (LS) method. In this study, alternative 3D datum transformation approaches (including the Total Least-Squares (TLS) and the Weighted TLS (WTLS) methods) were compared with the LS method over a test area. The results showed that the WTLS transformed 3D coordinates with better accuracy than the LS and TLS methods. Türkiye'nin Batısında 3B Datum Dönüşümü için En Küçük Kareler Yaklaşımlarının Karşılaştırma Analizi Anahtar kelimeler 3B datum dönüşümü; En küçük kareler (EKK); Toplam en küçük kareler (TEKK); Ağırlıklı toplam en küçük kareler (ATEKK). Özet Türkiye'de, Global Uydu Konumlama Sistemi teknolojisinin artan kullanımına paralel olarak, ulusal referans sistemi değiştirilmiştir. Referans sistemi değişikliğine bağlı olarak, ED50 ile WGS84 arasında üçboyutlu (3B) datum dönüşümü zorunlu hale gelmiştir. Jeodezik uygulamalar için çeşitli 3B datum dönüşüm algoritmaları geliştirilmiştir. En iyi bilinen teknik En-Küçük Kareler (EKK) dır. Bu çalışmada alternatif (Toplam En-Küçük Kareler (TEKK) yi ve ağırlıklı TEKK (ATEKK) yi içeren) 3B datum dönüşüm yaklaşımları bir test alanında EKK yöntemiyle karşılaştırılmıştır. Sonuçlar ATEKK nin 3B koordinatları EKK ve TEKK yöntemlerinden daha doğru dönüştürdüğünü göstermiştir.

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Correlation of coordinate transformation parameters

Cited by 7 publications

References 3 publications

The Scope of Application of Power Decoupling Technology and Its Evolution

The Scope of Application of Power Decoupling Technology and Its Evolution

Derivation of 9-parameter affine 3D geodetic datum transformations

Comparative Analysis of Least-squares Approaches for 3D Datum Transformation in Western Turkey

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