Design and Development of Light Weight Flexible Power Transmission Shaft for High Speed Fighter Aircraft Application

2005 ◽  
Author(s):  
S Jothi ◽  
V Balamurugan ◽  
S Ganesan
Keyword(s):  
High Speed ◽  
Power Transmission ◽  
Light Weight ◽  
Design And Development ◽  
Fighter Aircraft ◽  
Transmission Shaft ◽  
Aircraft Application

scholarly journals Balancing of a Power-Transmission Shaft With the Application of Axial Torque

1980 ◽  
Author(s):  
E. S. Zorzi ◽  
D. Flemming
Keyword(s):  
High Speed ◽  
Power Transmission ◽  
Weighted Least Squares ◽  
Experimental Results ◽  
Influence Coefficient ◽  
Influence Coefficients ◽  
Transmission Shaft ◽  
Good Comparison ◽  
M 12 ◽  
Least Squares Approach

Evaluation of power transmission shafting for high-speed balancing has shown that when axial torque is applied, the imbalance response is altered. An increase in synchronous excitation always occurs if the axial torque level is altered from the value used during balancing; this was the case even when the shaft was balanced with torque applied. The twisting of the long slender shaft produces a change in the imbalance distribution sufficient to disrupt the balanced state. This paper presents a review of the analytic development of a weighted least squares approach to influence coefficient balancing and a review of experimental results. The analytic approach takes advantage of the fact that the past testing has shown that the influence coefficients are not significantly affected by the application of axial torque. The 3.60-m (12-ft) long aluminum shaft, 7.62 cm (3 in.) in diameter was run through the first flexural critical speed at torque levels ranging from zero-torque to 903.8 N-M (8000 lb-in.) in 112.9 N-M (1000 lb-in.) increments. Good comparison was achieved between predicted and experimental results.

Influence of Applied Misalignment on the Balanced High Speed Flexible Coupling of Fighter Aircraft

2014 ◽  
Vol 592-594 ◽  
pp. 1084-1088 ◽  
Author(s):  
S. Nagesh ◽  
A.M. Junaid Basha ◽  
G. Thakur Dinesh Singh
Keyword(s):  
High Speed ◽  
Aircraft Engine ◽  
Light Weight ◽  
Fighter Aircraft ◽  
Flexible Coupling ◽  
Flexible Plates ◽  
Exciting Forces ◽  
Reaction Forces ◽  
Differential Thermal Expansion ◽  
Gear Box

The fighter aircraft transmission system consists of a light weight, High Speed Flexible Coupling (HSFC), used to transmit power from engine gear box to accessory gear box at speed ranging from 10,000 to 18,000 rpm. The HSFC accommodates larger parallel and axial misalignment resulting from differential thermal expansion of the aircraft engine and mounting arrangement. As the HSFC operates at higher rotational speeds close to critical velocities, it is important to analyze, the unbalance exciting forces considering the misalignment. In the present work, prediction of critical speed by camp bell diagram and unbalance response of the HSFC has been carried out using FEA. An experimental investigation also been carried out to study the influence of applied misalignment on a bi-plane dynamically balanced HSFC. The study shows that lower reaction forces are transmitted to HSFC end supports with the applied misalignments, as they are accommodated by the elastic material flexure of flexible plates.

scholarly journals Design and Development of a High Speed Sorting System Based on Machine Vision Guiding

2012 ◽  
Vol 25 ◽  
pp. 1955-1965 ◽  
Author(s):  
Wenchang Zhang ◽  
Jiangping Mei ◽  
Yabin Ding
Keyword(s):  
Machine Vision ◽  
High Speed ◽  
Design And Development ◽  
Sorting System

scholarly journals A High-Speed, Light-Weight Scalar Magnetometer Bird for km Scale UAV Magnetic Surveying: On Sensor Choice, Bird Design, and Quality of Output Data

2021 ◽  
Vol 13 (4) ◽  
pp. 649
Author(s):  
Arne Døssing ◽  
Eduardo Lima Simoes da Silva ◽  
Guillaume Martelet ◽  
Thorkild Maack Rasmussen ◽  
Eric Gloaguen ◽  
...  
Keyword(s):  
High Speed ◽  
Large Scale ◽  
Signal To Noise Ratio ◽  
Regional Scale ◽  
Weather Conditions ◽  
Light Weight ◽  
Output Data ◽  
Efficient Manner ◽  
Flexible System ◽  
Scalar Data

Magnetic surveying is a widely used and cost-efficient remote sensing method for the detection of subsurface structures at all scales. Traditionally, magnetic surveying has been conducted as ground or airborne surveys, which are cheap and provide large-scale consistent data coverage, respectively. However, ground surveys are often incomplete and slow, whereas airborne surveys suffer from being inflexible, expensive and characterized by a reduced signal-to-noise ratio, due to increased sensor-to-source distance. With the rise of reliable and affordable survey-grade Unmanned Aerial Vehicles (UAVs), and the developments of light-weight magnetometers, the shortcomings of traditional magnetic surveying systems may be bypassed by a carefully designed UAV-borne magnetometer system. Here, we present a study on the development and testing of a light-weight scalar field UAV-integrated magnetometer bird system (the CMAGTRES-S100). The idea behind the CMAGTRES-S100 is the need for a high-speed and flexible system that is easily transported in the field without a car, deployable in most terrain and weather conditions, and provides high-quality scalar data in an operationally efficient manner and at ranges comparable to sub-regional scale helicopter-borne magnetic surveys. We discuss various steps in the development, including (i) choice of sensor based on sensor specifications and sensor stability tests, (ii) design considerations of the bird, (iii) operational efficiency and flexibility and (iv) output data quality. The current CMAGTRES-S100 system weighs ∼5.9 kg (including the UAV) and has an optimal surveying speed of 50 km/h. The system was tested along a complex coastal setting in Brittany, France, targeting mafic dykes and fault contacts with magnetite infill and magnetite nuggets (skarns). A 2.0 × 0.3 km area was mapped with a 10 m line-spacing by four sub-surveys (due to regulatory restrictions). The sub-surveys were completed in 3.5 h, including >2 h for remobilisation and the safety clearance of the area. A noise-level of ±0.02 nT was obtained and several of the key geological structures were mapped by the system.

Vibration-Based Early Crack Diagnosis With Machine Learning for Spur Gears

2020 ◽  
Author(s):  
Fatih Karpat ◽  
Ahmet Emir Dirik ◽  
Onur Can Kalay ◽  
Oğuz Doğan ◽  
Burak Korcuklu
Keyword(s):  
Machine Learning ◽  
Fault Diagnosis ◽  
High Speed ◽  
Crack Detection ◽  
Power Transmission ◽  
Calculated Data ◽  
Design Parameters ◽  
Tooth Stiffness ◽  
Vibration Responses ◽  
Root Crack

Abstract Gear mechanisms are one of the most significant components of the power transmission systems. Due to increasing emphasis on the high-speed, longer working life, high torques, etc. cracks may be observed on the gear surface. Recently, Machine Learning (ML) algorithms have started to be used frequently in fault diagnosis with developing technology. The aim of this study is to determine the gear root crack and its degree with vibration-based diagnostics approach using ML algorithms. To perform early crack detection, the single tooth stiffness and the mesh stiffness calculated via ANSYS for both healthy and faulty (25-50-75-100%) teeth. The calculated data transferred to the 6-DOF dynamic model of a one-stage gearbox, and vibration responses was collected. The data gathered for healthy and faulty cases were evaluated for the feature extraction with five statistical indicators. Besides, white Gaussian noise was added to the data obtained from the 6-DOF model, and it was aimed at early fault diagnosis and condition monitoring with ML algorithms. In this study, the gear root crack and its degree analyzed for both healthy and four different crack sizes (25%-50%-75%-100%) for the gear crack detection. Thereby, a method was presented for early fault diagnosis without the need for a big experimental dataset. The proposed vibration-based approach can eliminate the high test rig construction costs and can potentially be used for the evaluation of different working conditions and gear design parameters. Therefore, catastrophic failures can be prevented, and maintenance costs can be optimized by early crack detection.

scholarly journals Design and Development of Transmission and Braking Systems in Go-kart

2021 ◽  
Vol 9 (VI) ◽  
pp. 2876-2888
Author(s):  
Hamida Shakil Jamadar
Keyword(s):  
Small Scale ◽  
Design And Development ◽  
Transmit Power ◽  
Motor Sport ◽  
Transmission Shaft ◽  
Important System

We have completed this paper as per rulebook of kart racing competition. It involves 5 different departments which are Transmission, Roll cage, Brake, Steering, Wiring. This karting has no suspension and differential. It is generally recognized as small scale or economic way of motor sport. Transmission is the most important system in any vehicle. In go kart, there is no differential therefore we have to transmit power directly to shaft. Braking is a system which is used to stop transmitting power at instant. This involves stopping revolving transmission shaft by applying force on pedal.

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