Results 51 to 60 of about 2,370 (218)

Century‐long trends in plant diversity of temperate mountain vegetation are modulated along elevation gradient

Journal of Ecology, Volume 114, Issue 3, March 2026.
Resurvey studies in mountain forests of the Tatra Mountains (Central Europe) show that plant diversity has increased over the past century, particularly at lower elevations. These shifts were associated more with increased nitrogen deposition and reduced grazing pressure than with direct climate warming.
Kacper Foremnik, Radim Hédl, Antoni Zięba, Jerzy Szwagrzyk, Bartłomiej Surmacz, Remigiusz Pielech   +5 more
wiley   +1 more source

ITS ON RAILWAY

Acta Polytechnica CTU Proceedings, 2017
Development of technology management and security, transmission and information systems allows the concept of process management and security of railways and organizing the operation of a new, as yet non-phase in a non-traditional way.
Martin Leso
doaj   +1 more source

Phase‐Advanced ADRC: Precision Missile Attitude Control via Delay Compensation

IET Control Theory &Applications, Volume 20, Issue 1, January/December 2026.
This paper proposes measurement delay compensated phase‐leading linear active disturbance rejection control (MPLADRC) with a novel observer (MPLESO) integrating synchronized input filtering and phase‐lead compensation. This framework eliminates temporal signal mismatch and phase lag in missile attitude control, achieving zero steady‐state error for ...
Minghao Liao, Shurong Li
wiley   +1 more source

Damping Compensation for Active Vibration Isolation System With Active Disturbance Rejection Control

IET Electric Power Applications, Volume 20, Issue 1, January/December 2026.
The analysis of classic active disturbance rejection control (ADRC) for active vibration isolation systems (AVIS) with electromagnetic actuators demonstrates that directly applying ADRC to these systems has some shortcomings. To overcome the limitations of classic ADRC in AVIS with electromagnetic actuators, damping compensation is proposed to enhance ...
Cuicui Huang, Zikang Li, Chunhui Dai, Zhiqiang Long   +3 more
wiley   +1 more source

Sliding‐Mode Control of Electromagnetic Suspension Systems Considering Disturbance Compensation

IET Intelligent Transport Systems, Volume 20, Issue 1, January/December 2026.
This study proposes an integrated control strategy for magnetic levitation systems, combining a cascaded linear extended state observer with an improved sliding‐mode control. This method accurately estimates and compensates for disturbances, significantly enhancing suspension stability and rejection capability.
Hailin Hu, Qiang Luo, Tao Gao, Yan Huang, Rencai Wu   +4 more
wiley   +1 more source

Coordinated control of active disturbance rejection and grid voltage feedforward for grid‐connected inverters

IET Power Electronics, Volume 19, Issue 1, January/December 2026.
This paper introduces the research on the inductance‐capacitor‐capacitor‐inductance grid‐connected inverter using active disturbance rejection and grid voltage feedforward coordinated control technology. The pade approximation is performed on the inductance‐capacitor‐capacitor‐inductance filter to derive the first‐order discretization mathematical ...
Guang‐Xin Zhong, Zhiteng Wang, Jiahua Zhou, Jian Li, Qingyu Su   +4 more
wiley   +1 more source

A DC Bias Suppression Sensorless Control for SPMSM Based on Extended State Observer with Improved Position Estimation Accuracy

Energies
In sensorless control systems of permanent magnet synchronous motors (PMSMs), the traditional linear extended state observer (LESO) is preferred due to its simplicity and ease of implementation.
Jinpu Lin, Manfeng Dou, Haiyun Jia, Shuhao Yan, Mengxi Dang, Dongdong Zhao, Zhiguang Hua   +6 more
doaj   +1 more source

Linear Active Disturbance Rejection Control for DC Bus Voltage of Permanent Magnet Synchronous Generator Based on Total Disturbance Differential

Energies, 2019
The wind power grid-connected inverter system has nonlinear, strong coupling, and is susceptible to grid voltage fluctuations and nonlinear load effects.
Xuesong Zhou, Mao Liu, Youjie Ma, Bao Yang, Faqing Zhao   +4 more
doaj   +1 more source

An Adaptive Pitch Control Strategy for Wind Turbines Using PIO‐Optimized Parallel Observation Deviation‐Coupled Linear Active Disturbance Rejection Control

IET Power Electronics, Volume 19, Issue 1, January/December 2026.
This study proposes a parallel observation deviation‐coupled linear active disturbance rejection control (PODC‐LADRC) strategy optimized by a pigeon‐inspired optimization algorithm to mitigate asymmetric aerodynamic loads in large‐scale wind turbines. By utilizing a decoupled observation architecture, the proposed method reconstructs total disturbances
Chaoqun Xiang, Kongyi Wei, Hongwen Liu, Ruirui Zhou, Jingming Li   +4 more
wiley   +1 more source

Overvoltage Suppression Strategy for HPFC Based on Bandwidth Adaptive LADRC and Improved Reactive Power Control

IET Renewable Power Generation, Volume 20, Issue 1, January/December 2026.
Overvoltage occurs in Hybrid Power Flow Controllers (HPFC) under specific fault conditions. This paper proposes a linear Active Disturbance Rejection (LADRC) strategy integrating reactive power adaptive regulation and bandwidth parameter adaptive adjustment to suppress whole‐process overvoltage in HPFC.
Jianhui Meng, Xincheng Yuan, Peng Wu, Penghui Zhao, Yan Xu, Dajiang Wang   +5 more
wiley   +1 more source