Results 71 to 80 of about 142,102 (297)

A fault estimation and fault–tolerant control based sliding mode observer for LPV descriptor systems with time delay

open access: yesInternational Journal of Applied Mathematics and Computer Science, 2021
This paper considers the problem of fault-tolerant control (FTC) and fault reconstruction of actuator faults for linear parameter varying (LPV) descriptor systems with time delay.
Hamdi Habib   +3 more
doaj   +1 more source

Single reflector interference spectrometer and drive system therefor [PDF]

open access: yes, 1974
In a Fourier interference spectrometer of the doublepass retroreflector type, a single mirror is employed in the path of both split beams of an incoming ray to cause them to double back through separate retroreflectors. Changes in optical path length are
Schindler, R. A.
core   +1 more source

Digital Actuation Control of Soft Robotic Origami With Self‐Folding Liquid Crystal Elastomer Hinges

open access: yesAdvanced Functional Materials, EarlyView.
Self‐folding soft‐rigid hybrid robotic origami is enabled by liquid crystal elastomer actuators with embedded Joule heating and closed‐loop digital control. Digitally addressable hinges provide reversible and programmable transitions between distinct folded states while maintaining actuation performance at high cycle counts (over 1500).
David C. Bershadsky   +3 more
wiley   +1 more source

Dynamic analysis and vibration control of a multi-body system using MSC Adams

open access: yesLatin American Journal of Solids and Structures
In this paper, modelling and simulation of a multi-body system for its vibration control using sensors and actuators is presented. The model developed on MSC ADAMS consists of six legs connecting moving and base plates using spherical joints with axial ...
M. Naushad Alam   +2 more
doaj   +1 more source

Multi-Fidelity Design Optimisation of a Solenoid-Driven Linear Compressor

open access: yesActuators, 2020
Improved management and impermeability of refrigerants is a leading solution to reverse global warming. Therefore, crank-driven reciprocating refrigerator compressors are gradually replaced by more efficient, oil-free and hermetic linear compressors ...
Jarl Beckers   +5 more
doaj   +1 more source

The linear boom actuator designed for the Galileo spacecraft [PDF]

open access: yes, 1983
Because the linear boom actuator is to be used on a flight spacecraft, as opposed to a ground based application, there is a comprehensive set of requirements. First, of course, the actuator must be capable of positioning and holding the load.
Koch, E. F.
core   +1 more source

Meta‐Rod Mechanical Metamaterials With Programmable Reconfiguration

open access: yesAdvanced Functional Materials, EarlyView.
Existing mechanical metamaterials achieve programmable large deformations in planar square or cubic configurations, restricted by required complex boundary conditions. This research proposes a 1D metamaterial, Meta‐rod, with linear, bending, twisting, area, and volume deformation modes.
Atharva Pande, Lyes Kadem, Hang Xu
wiley   +1 more source

The Linear and Nonlinear Electro-Mechanical Fin Actuator

open access: yesAl-Khawarizmi Engineering Journal, 2018
Electromechanical actuators are used in a wide variety of aerospace applications such as missiles, aircrafts and spy-fly etc. In this work a linear and nonlinear fin actuator mathematical model has been developed and its response is investigated by ...
Shaimaa A. Mahdi, Zeina A. Abdul Redha
doaj  

Superconducting linear actuator [PDF]

open access: yes
Special actuators are needed to control the orientation of large structures in space-based precision pointing systems. Electromagnetic actuators that presently exist are too large in size and their bandwidth is too low.
Hockney, Richard, Johnson, Bruce
core   +1 more source

Actuators for smart applications [PDF]

open access: yes, 2010
Actuator manufacturers are developing promising technologies\ud which meet high requirements in performance, weight and\ud power consumption. Conventionally, actuators are characterized\ud by their displacement and load performance.
Akkerman, Remko   +3 more
core   +2 more sources

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