Results 31 to 40 of about 2,887,363 (295)
Polarization–Insensitive Angularly Stable Compact Triple Band Stop Frequency Selective Surface for Shielding Electromagnetic Radiations [PDF]
Radioengineering, 2023 A compact single-layer, polarization-insensitive, and angularly stable frequency selective surface (FSS) based multi-stop band filter is reported for shielding three useful frequency bands covering 1.82–2.86 GHz Industrial, scientific, and medical (ISM),
J. Acharjee +3 more
doaj
Nanoradian angular stabilization of x-ray optical components [PDF]
Review of Scientific Instruments, 2010 An x-ray free-electron laser oscillator (XFELO) has been recently proposed [K. Kim et al., Phys. Rev. Lett. 100, 244802 (2008)]. Angular orientation and position in space of Bragg mirrors of the XFELO optical cavity must be continuously adjusted to compensate for the instabilities and maximize the output intensity. An angular stability of about 10 nrad
Stoupin, Stanislav +5 more
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FPGA based angular stabilization of a quadcopter
MACRo 2015, 2017 Abstract This paper presents an FPGA based method for stabilization of a quadcopter around the principal axes pitch, roll, and yaw using IMU sensors for angular estimation and the PID algorithm for control. The goal was to solve the problem in hardware level providing a fast method for stabilization. Using an FPGA circuit parallel with a
Szabolcs Hajdú +2 more
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IEEE Access, 2021 A single metal layer, multifunctional frequency selective surface with a very simple pattern of the unit cell, containing a U-shaped metal resonator on FR4 substrate, and working in the low GHz frequency range is proposed.
Andrei-Marius Silaghi +2 more
doaj +1 more source
A Broadband Ultra-Thin Polarization Rotator Using Periodically Loaded Parallel Strip-Lines
IEEE Access, 2021 A polarization rotator based on loaded parallel strip-lines is theoretically and experimentally investigated. The unit cells are short-stub loaded parallel strip-lines. The arrays on the front and back layers are rotated by 90° to each other.
Xiaoming Liu +5 more
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Nonlinear control with distributed delay for angular stabilization of a rigid body
Vestnik of Saint Petersburg University. Mathematics. Mechanics. Astronomy, 2022 The problem of angular stabilization of a rigid body with an arbitrary triaxial ellipsoid of inertia is solved. The control strategy is based on the type of PID controller, in which, instead of the classical integral term, a more flexible control option is used, which assumes the presence of a distributed delay (integral term) in the control torque. In
Aleksandrov, A. Yu., Tikhonov, A. A.
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A novel continuously variable angular vertical comb-drive with application in scanning micromirror [PDF]
, 2013 An angular vertical comb-drive (AVC) with electrically controllable initial comb-offset is presented in the context of a single crystalline silicon scanning micromirror.
Lì, Lì L. +3 more
core +4 more sources
Temperature stabilization of the angular velocity measuring device
IOP Conference Series: Materials Science and Engineering, 2021 Abstract The article examines the possibility of using an active two-circuit thermal control system to reduce the influence of temperature disturbances on the components of the angular velocity measuring device. Special attention is devoted to the problem of temperature stabilization in fiber-optic gyroscopes mounted in the measuring ...
A V Golikov +3 more
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On Exponential Stabilization of $N$-Level Quantum Angular Momentum Systems [PDF]
SIAM Journal on Control and Optimization, 2019 In this paper, we consider the feedback stabilization problem for $N$-level quantum angular momentum systems undergoing continuous-time measurements. By using stochastic and geometric control tools, we provide sufficient conditions on the feedback control law ensuring almost sure exponential convergence to a predetermined eigenstate of the measurement ...
Liang, Weichao +2 more
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Angular needle tracker and stabilizer for image-guided interventions
Minimally Invasive Therapy & Allied Technologies, 2020 Minimally invasive image-guided interventions have changed the face of procedural medicine. For these procedures, safety and efficacy depend on precise needle placement. Needle targeting devices help improve the accuracy of needle placement, but their use has not seen broad penetration.
Zhao, Z +5 more
openaire +3 more sources