Results 101 to 110 of about 168 (145)

Maintenance and inspection as risk factors in helicopter accidents: Analysis and recommendations. [PDF]

PLoS One, 2019
Saleh JH, Tikayat Ray A, Zhang KS, Churchwell JS.   +3 more
europepmc   +1 more source

Effects of Material Selection on the Remanufacturability of a Swashplate in an Axial Piston Pump

Journal of Advanced Manufacturing and Processing
ABSTRACT A swashplate is a critical component in an axial piston pump for motion transformation that undergoes cyclic loading. Traditionally, swashplates are not designed to have multiple lives of operation. According to industry experts, a remanufacturability analysis of swashplates suggests that the scrap rate is high.
Elçin Gunay
exaly   +3 more sources

Transient start-up of an electric swashplate refrigeration compressor

Applied Thermal Engineering, 2021
Abstract The design of compact, high performance electric swashplate refrigeration compressors demands a clear understanding of different physical phenomena and their interactions taking place inside the compressor. The dynamic characteristics of the compressor are associated with the start-up transients of the swash-plate mechanism and the time ...
Peter Woodfield, Dzung Dao
exaly   +3 more sources

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Calibration of Swashplate for a Helicopter with Vision Based Measurements

2012 International Conference on Connected Vehicles and Expo (ICCVE), 2012
In an eCCPM helicopter, at least three servos have their movement combined together to control the swashplate. All of these servos are small in size and driven by pulse width modulated (PWM) signals. In the model to control a miniature unmanned helicopter, the swashplate is a very important module.
Jianguo Yao
exaly   +3 more sources

B208 Numerical Simulation of A Slipper Model for Swashplate Type Axial Piston Pumps and Motors : Effects of Swashplate Vibration

The Proceedings of the Symposium on the Motion and Vibration Control, 2015
Toshiharu Kazama
exaly   +2 more sources

Real gas model for an electric swashplate refrigeration compressor

International Journal of Refrigeration, 2020
Abstract A real-gas, restricted-flow valve model is compared with an ideal-gas, ideal-valve model for a 10-cylinder swashplate refrigeration compressor. Real gas properties of R134a are evaluated using the NIST standard reference database. A minor-loss discharge-coefficient approach is used to model the refrigerant flow rate through reed valves while
Peter Woodfield, Dzung Dao
exaly   +3 more sources

Design and Experimental Validation of a Tandem Helicopter Based on Electronic Swashplate

Lecture Notes in Electrical Engineering, 2022
Weiping Zhang, Chaofeng Wu
exaly   +2 more sources

Fatigue Life Improvement of the Roller Swashplate Bearing of an Axial Swashplate Type Piston Pump

ASME/BATH 2014 Symposium on Fluid Power and Motion Control, 2014
The roller swashplate bearing in hydraulic piston pumps is very unique in applications of roller element bearings. The main advantages of this type of bearings are low friction, very small difference between start torque and steady state torque, and no additional pressure source is required for their functioning.
Hongliu Du, David J. Carlson
openaire   +1 more source

Torque on the Swashplate of an Axial Piston Pump

Journal of Dynamic Systems, Measurement, and Control, 1985
As part of a study involving methods of control of an axial piston pump, it is required to obtain linear or linearized equations of motion of the system’s states. The torque imposed on the plate by the pumping action of the pistons is the most important term in the equation of motion of the swashplate.
G. Zeiger, A. Akers
openaire   +1 more source

Calculating Method for the Leakage between Slipper and Swashplate in Spherical Swashplate Type Axial Piston Pump with Conical Cylinder

Advanced Materials Research, 2013
This paper takes the piston that has tapered rotor spherical axial swashplate as the research object, aiming to develop research of calculation of slipping shoe and the swashplate of the lubrication circular leakage. First , analyzing the structure of piston pump that is characterized by slipping shoe static pressure lubrication, Based on the continuum
Yong Qin Chen, Yang Shun Wang
openaire   +1 more source