Your Selections

Unmanned aerial vehicles
Show Only

Collections

File Formats

Content Types

Dates

Sectors

Topics

Authors

Publishers

Affiliations

Committees

Events

Magazine

Series

 

Analysis and Aerodynamic Stability on Design of Low cost and Economical Monocopter

UG Scholar-Harshil BHANDARI
  • Technical Paper
  • 2019-28-2523
To be published on 2019-11-21 by SAE International in United States
Most recent or all developments in the field of small UAV’s seem to use Quadcopters. It’s a valued commenting that a quadcopter is a smaller amount stable than a similar regular chopper and is additionally less economical. A Quadcopter UAV’s with four propellers is always a major concern to the society when brings to its stability as its major factor. To design and analyze the use of one propeller monocopter is the main objective of this paper. Wacky Whirler technology used here to demonstrate the passage of the monocopter. It is a single propeller powered with a coreless motor which is a modern enhancement in the UAV. It is based on the All Rotating monocopter theory. In the proposed system, controller based on IOT can be used which will be helpful in monitoring and processing the microdrone status. These forms of style have several potential applications in surveillance and agriculture; there are several eventualities wherever it's tempting for the stable UAV to be able to travel safely to long distances and hover for extended periods of time.
 

The Szorenyi Three-Chamber Rotary Engine concept

Partner Rotary Engine Development Agency-Peter King
  • Technical Paper
  • 2019-24-0168
To be published on 2019-09-09 by SAE International in United States
Currently automotive engines are reciprocating or Wankel rotary engine types. Reciprocating engines are bulky, heavy and complex, mainly due to the intake and exhaust valves and their associated cam-­‐train. Wankel engines are rev limited due to the large eccentric load on the crankshaft, and have poor sealing of the apex seals leading to poor economy and undesirable emission gases. The Rotary Engine Development Agency (REDA) has designed a three­‐chamber rotary internal combustion engine concept using its patented Szorenyi Curve. It is an evolution of the four chamber engine design which was the subject of SAE Technical Paper 2017-­‐01-­‐2413 and SAE publication ‘So You Want to Design Engines: UAV Propulsion Systems’. This paper on the three­‐chamber engine concept includes an analysis of the major issues affecting the Wankel engine. The Wankel engine’s geometry results in excessive crankshaft deflection (due to the centrifugal force of the rotor which is eccentric to the crankshaft) and this limits its revs. However, the analysis in the paper reveals that the revs cannot be increased by increasing the diameter of the…
 
new

Microturbine Propulsion for UAVs

Aerospace & Defense Technology: August 2019

  • Magazine Article
  • 19AERP08_03
Published 2019-08-01 by SAE International in United States

Seventy years ago, military aviation moved from reciprocating engines to vastly more reliable turbo jets and turboprops. Shortly after, the commercial air transport industry followed suit, enabling modern air transport. Today, virtually all large aircraft rely on turbine propulsion, yet small aircraft, both manned and unmanned, have not exploited the advantages of turbines for propulsion.

Annotation icon
 

UAV Icing: Ice Accretion Experiments and Validation

Norwegian University of Science and Technology (NTNU)-Richard Hann
Published 2019-06-10 by SAE International in United States
Atmospheric icing is a key challenge to the operational envelope of medium-sized fixed-wing UAVs. Today, several numeric icing codes exist, that all have been developed for general aviation applications. UAVs with wingspans of several meters typically operate at Reynolds numbers an order of magnitude lower than commercial and military aircraft. Therefore, the question arises to what extent the existing codes can be applied for low-Reynolds UAV applications to predict ice accretion. This paper describes an experimental campaign at the Cranfield icing wind tunnel on a RG-15 and a NREL S826 airfoil at low velocities (25-40m/s). Three meteorological icing conditions have been selected to represent the main ice typologies: rime, glaze, and mixed ice. Each case has been run at least twice in order to assess the repeatability of the experiments. Manual ice shape tracings have been taken at three spanwise locations for each icing case. The liquid water content calibration was performed according to ARP5905 using the icing blade method. The tests have initially shown significantly higher water contents than anticipated, which could be traced…
Datasets icon
Annotation icon
 

JAUS Autonomous Capabilities Service Set

AS-4JAUS Joint Architecture for Unmanned Systems Committee
  • Aerospace Standard
  • AS8024
  • Current
Published 2019-06-10 by SAE International in United States
This document defines a set of standard application layer interfaces called JAUS Autonomous Capabilities Services. JAUS Services provide the means for software entities in an unmanned system or system of unmanned systems to communicate and coordinate their activities. The Autonomous Behaviors Services represent the platform-independent capabilities commonly found in platforms across domains, including air, maritime, and ground. At present five (5) services are defined in this document. These services are: Comms Lost Policy Manager: Detect and recover from loss of communications with a control station Retrotraverse: Return along a path previously traveled Self-Righting: Attempt to recover from a tip over condition Cost Map 2D: Provides information about the current operating environment of the platform Path Reporter: Provides information about the previous or future planned path of the platform
Datasets icon
Annotation icon
 

ONR Short Pulse Research, Evaluation and non-SWaP Demonstration for C-sUAV Study

  • Magazine Article
  • TBMG-34529
Published 2019-06-01 by Tech Briefs Media Group in United States

The OSPRES (ONR Short Pulse Research, Evaluation and non-SWaP) program performed fundamental work in the areas of Silicon (Si) and Gallium Nitride (GaN) based photoconductive switch development, measurement of HPM waveform dependent effects on small unmanned aerial vehicle (sUAV), adaptive design of experiments, noise injection, RF coupling to sUAV's, minimally dispersive wave theory, and positive feedback non-linear transmission line (NLTL) development.

 

ONR Short Pulse Research, Evaluation and non-SWaP Demonstration for C-sUAV Study

Aerospace & Defense Technology: June 2019

  • Magazine Article
  • 19AERP06_09
Published 2019-06-01 by SAE International in United States

Research project is designed to map small unmanned aerial vehicle (sUAV) effects space, empirically and by simulation, as a function of high power microwave (HPM) waveform to develop effective countermeasures.

The OSPRES (ONR Short Pulse Research, Evaluation and non-SWaP) program performed fundamental work in the areas of Silicon (Si) and Gallium Nitride (GaN) based photoconductive switch development, measurement of HPM waveform dependent effects on small unmanned aerial vehicle (sUAV), adaptive design of experiments, noise injection, RF coupling to sUAV's, minimally dispersive wave theory, and positive feedback non-linear transmission line (NLTL) development.

Annotation icon
 

Counter-Drone Technology

  • Magazine Article
  • TBMG-34537
Published 2019-06-01 by Tech Briefs Media Group in United States

Citadel Defense San Diego, CA 760-224-3393

 

Landing Gear Structural Health Monitoring

A-5 Aerospace Landing Gear Systems Committee
  • Aerospace Standard
  • AIR6168A
  • Current
Published 2019-05-23 by SAE International in United States
This SAE Aerospace Information Report (AIR) discusses past and present approaches for monitoring the landing gear structure and shock absorber (servicing), opportunities for corrosion detection, methods for transient overload detection, techniques for measuring the forces seen by the landing gear structure, and methods for determining the fatigue state of the landing gear structure. Landing gear tire condition and tire pressure monitoring are detailed in ARP6225, AIR4830, and ARP6137, respectively. Aircraft Brake Temperature Monitoring Systems (BTMS) are detailed in AS1145.
Datasets icon
Annotation icon
 

Interface Standard, Airborne EO/IR Systems, Data

AS-1C Avionic Subsystems Committee
  • Aerospace Standard
  • AS6135A
  • Current
Published 2019-05-14 by SAE International in United States
This standard defines the data interfaces between a host aircraft (“platform”) and an Electro-Optic/Infrared (EO/IR) sensor. These data interfaces cover various types of data including: imagery, metadata, command, status, and responses (CSR), geospatial postion, time, test and maintenance, and hand-controller. This standard does not cover mechanical or electrical interfaces.
Datasets icon
Annotation icon