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関連する概念動画

Active Filters01:25

Active Filters

924
Active filters are electronic circuits that use operational amplifiers (op-amps), resistors, and capacitors to filter out unwanted frequency components from a signal. A first-order low-pass active filter is designed to pass signals with a frequency lower than a certain cutoff frequency and attenuate frequencies higher than that cutoff frequency. The transfer function for a first-order low-pass active filter is:
924
Linear Approximation in Frequency Domain01:26

Linear Approximation in Frequency Domain

131
Linear systems are characterized by two main properties: superposition and homogeneity. Superposition allows the response to multiple inputs to be the sum of the responses to each individual input. Homogeneity ensures that scaling an input by a scalar results in the response being scaled by the same scalar.
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear....
131
Aliasing01:18

Aliasing

224
Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original...
224
Passive Filters01:27

Passive Filters

606
Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources.
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
606
Reconstruction of Signal using Interpolation01:10

Reconstruction of Signal using Interpolation

335
Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next...
335
Phase-lead and Phase-lag Controllers01:22

Phase-lead and Phase-lag Controllers

224
Understanding the working function of different types of controllers can be illustrated with practical analogies, such as adjusting a stereo's volume equalizer. Cranking up the bass involves a phase-lead controller, which functions as a high-pass filter, while increasing the treble uses a phase-lag controller, which acts as a low-pass filter. PD controllers, similar to high-pass filters, enhance the system's response to high-frequency components. PI controllers, akin to low-pass...
224

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Updated: Sep 9, 2025

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
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Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

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転送アライナメントのためのフージーロジックベースの適応フィルタリング

Zhaohui Gao1, Jiahui Yang2, Chengfan Gu3

  • 1School of Electronic Engineering, Xi'an Shiyou University, Xi'an 710065, China.

Sensors (Basel, Switzerland)
|August 28, 2025
PubMed
まとめ
この要約は機械生成です。

この研究では,ストラップダウン慣性ナビゲーションシステム (SINS) の転送アライナメントの精度を改善するために,フージーロジック適応フィルターを導入します. この新しい方法は,システムモデルのエラーを効果的に管理することで,SINS状態の推定を強化し,18%以上の精度を達成します.

キーワード:
アダプティブ・ロバストフィルタリング曖昧な論理理論ストラップダウン慣性ナビゲーショントランスファー・アラインメント

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Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator
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Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator
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科学分野:

  • ナビゲーションシステム
  • 制御理論
  • シグナル処理

背景:

  • ストラップダウン慣性ナビゲーションシステム (SINS) は,機内戦術車両の正確な転送配列を必要とします.
  • カルマンフィルターのシステムモデルエラーは,SINS状態推定精度を低下させる.

研究 の 目的:

  • 曖昧な論理に基づいた適応フィルタリング方法をSINS転送アライナメントに開発する.
  • システムモデルのエラーがSINS状態推定に与える影響を軽減する.

主な方法:

  • 曖昧な論理に基づいた適応フィルタリングアプローチを SINS 転送アライナメントのために設計した.
  • カルマンフィルターフレームワークに残留値を含む状態と測定エラーモデルを埋め込みます.
  • システム測定を推定し,残留を最小限に抑えることで状態コヴァリアンスを予測するために,フージルルを使用した.

主要な成果:

  • 提案された方法は,SINS転送アライナメントにおけるシステムモデルのエラーを効果的に処理します.
  • ベンチマーク方法と比較して少なくとも18.83%高い精度を達成しました.
  • シミュレーションと実験で 方法の性能が確認されました

結論:

  • 曖昧なロジック・アダプティブ・フィルターは,SINSの転送アライナメントの精度を大幅に改善します.
  • このアプローチは,空中戦術車両のナビゲーションに 堅固な解決策を提供します.
  • この方法は,モデルの不確実性を管理する上で優れたパフォーマンスを示しています.