Results 61 to 70 of about 525,947 (205)
IEEE Access, 2020 This paper presents a nonlinear error feedback controller for a pneumatic soft bionic fin based on an extended state observer. Manufacturing process is shown for a bionic stingray with the pneumatic soft bionic fin. A test experiment is carried out for a
Haiyan Cheng +4 more
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Natural turbulence electrical power generator [PDF]
, 1980 An energy conversion apparatus is disclosed in which a stator, fixed to a watertight housing, is coupled to a rotor by a helical spring which suspends the rotor from the housing. Natural turbulence of a fluid, such as water or air, causes acceleration of
Grana, D. C., Wilem, R. T.
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FrictionIn modern high-tech industries, such as aerospace, nuclear energy, and electric power, there is increasing demand for materials with high-temperature adaptability and superior lubrication properties.
Haolin Li +5 more
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The influence of temperature on ultrasonic signals in online measurement of oil film thickness
FrictionUltrasonic reflection provides a real-time way to monitor oil film thickness in a running machine with a nondestructive advantage. However, the influence mechanism of temperature on reference signals has not been clarified thus far, which hinders the ...
Yaping Jia +6 more
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Upstream-radiated rotor–stator interaction noise in mean swirling flow [PDF]
, 2005 A major component of the noise in modern aeroengines is rotor–stator interaction noise generated when the wake from the rotating fan impinges on a stator row downstream.
Cooper, A. J., Peake, N.
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LubricantsCarbon quantum dots (CQDs) have already demonstrated their utility as lubricant additives, and non-contact temperature sensing based on CQDs offers considerable potential for condition monitoring in mechanical, electrical, and other fields, as well as ...
Jiannan Sun +5 more
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Inverse Rate-Dependent Rayleigh Model Based Feedforward Control for Piezoelectric-Driven Mechanism
IEEE Access, 2020 In this article, a novel feedforward control method is proposed to control the hysteretic nonlinearity and resonance in piezoelectric-driven mechanism.
Meng Zhang, Zhigang Liu, Yu Zhu
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Machines, 2017 The essence of the machining process is the interaction that occurs between machine tools and a workpiece under certain conditions of cutting parameters.
Hongrui Cao, Denghui Li, Yiting Yue
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Measured and calculated characteristics of wind turbine noise [PDF]
, 1981 The results of an analytical and experimental investigation of wind turbine noise are presented. Noise calculations indicate that for configurations with the rotor downwind of the support tower, the primary source of noise is the rapid change in rotor ...
Greene, G. C.
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A New Actuator Surface Model with Improved Wake Model for CFD Simulations of Rotorcraft [PDF]
, 2017 Simulations of rotorcraft operating in unsteady flow-fields, manoeuvring flight, or with complex rotor configurations pose a significant challenge to current simulation methods.
Barakos, Geogre +3 more
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