Results 61 to 70 of about 471,914 (344)

Advances in Solid‐Phase Processing Techniques: Innovations, Applications, and Future Perspectives

Advanced Materials Technologies, EarlyView.
Based on practical manufacturing challenges, this review examines advanced solid‐phase processing techniques that overcome the inherent limitations of conventional melting‐based and traditional solid‐phase manufacturing, enabling the production of higher‐performance components at reduced cost through process innovation and improved supply‐chain ...
Tianhao Wang
wiley   +1 more source

Advanced Governor for Hydroelectric Turbines 1

IFAC Proceedings Volumes, 1992
Abstract This paper deals with a prototype of a speed and power control system for an hydroelectric power unit. Its structure and basic features are described. Main characteristics are the controller adaptative parameter algorithm with preprogrammed gains, the functions incorporated in sensors and actuators like autocalibration and self-diagnosis.
J. Riera, R. Cardoner
openaire   +1 more source

Transducers Across Scales and Frequencies: A System‐Level Framework for Multiphysics Integration and Co‐Design

Advanced Materials Technologies, EarlyView.
Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu, Mengyao Xiao, Zhouli Sui, Yinpeng Wang, Daoye Zheng, Yuxin Liu, Luwei Wang, Huajun Liu, Chengkuo Lee   +8 more
wiley   +1 more source

Research on optimization of hydraulic turbine governor based on PSO algorithm

IOP Conference Series: Earth and Environment, 2018
Due to the complex structure of the turbine control system, poor dynamic performance and difficult stability, the conventional PID tuning method widely used in the turbine governor is becoming increasingly difficult to meet the actual control ...
X. P. Jiang, H. Zhu, W. Wang, Z. W. Wang, Y. Y. Luo   +4 more
semanticscholar   +1 more source

Quantitative Control Approach for Wind Turbine Generators to Provide Fast Frequency Response with Guarantee of Rotor Security

, 2017
Wind generation is expected to reach substantially higher levels of penetration in the near future. With the converter interface, the rotor inertia of doubly-fed induction generator (DFIG) based wind turbine generator is effectively decoupled from the ...
Tomsovic, Kevin, Wang, Siqi
core   +1 more source

Additively Manufactured Porous Ceramics as Tunable Dielectrics for Passive Temperature Sensing

Advanced Materials Technologies, EarlyView.
Porous ceramic lattices, 3D‐printed from a multicomponent oxide ink, are integrated with LC resonators for passive wireless temperature sensing. By tuning porosity, the dielectric properties and RF response are engineered to produce distinct resonant frequency shifts with temperature. The results establish a structure‐driven approach to customizing the
Sogol Heidarishahrivar, Aminul Islam, Chang Woo Gal, Insup Kim, Yeong‐Jin Choi, Woo Soo Kim   +5 more
wiley   +1 more source

Small-Signal Stability and Dynamic Behaviors of a Hydropower Plant With an Upstream Surge Tank Using Different PID Parameters

IEEE Access, 2021
This paper used the state space method to establish a stability analysis model of a hydroturbine governing system (HTGS) coupled with a water diversion system.
Gaohui Li, Jian Zhang, Xumin Wu, Xiaodong Yu   +3 more
doaj   +1 more source

Experimental Implementation of Hydraulic Turbine Dynamics and a Fractional Order Speed Governor Controller on a Small-Scale Power System

IEEE Access
In this paper, the practical application of automatic control techniques is performed to enhance the performance of the isochronous speed regulator of hydraulic turbines, thus making the electrical power system more efficient.
Claudia Sabrina Monteiro Da Silva, Nei Junior Farias Da Silva, Florindo A. C. Ayres Júnior, Renan L. P. de Medeiros, L. E. Silva, Vicente Ferreira de Lucena   +5 more
semanticscholar   +1 more source

Sensor-based optimized control of the full load instability in large hydraulic turbines [PDF]

, 2018
Hydropower plants are of paramount importance for the integration of intermittent renewable energy sources in the power grid. In order to match the energy generated and consumed, Large hydraulic turbines have to work under off-design conditions, which ...
Egusquiza Estévez, Eduard, Egusquiza Montagut, Mònica, Presas Batlló, Alexandre, Valentín Ruiz, David, Valero Ferrando, Ma. del Carmen   +4 more
core   +2 more sources

Waveguide Photoactuators: Materials, Fabrication, and Applications

Advanced Robotics Research, EarlyView.
Waveguide photoactuators convert guided light into mechanical motion. Their tethered‐flexible design enables minimally invasive surgery and confined‐space robotics. This review aims to guide materials selection, device design, and system integration, accelerating the transition of waveguide photoactuators from laboratory prototypes to versatile ...
Minjie Xi, Hemin Pan, Yang Zong, Yongfeng Mei, Jizhai Cui   +4 more
wiley   +1 more source