scholarly journals Project of high altitude balloon launched micro glider: Aircraft design, control and flight test

2020 ◽  
Vol 12 ◽  
pp. 175682932097995
Author(s):  
Zhengyu Qu ◽  
Cuichun Li ◽  
Yong Hao ◽  
Feng Yan ◽  
Yanchu Yang
Keyword(s):  
High Altitude ◽  
System Design ◽  
Target Position ◽  
Aircraft Design ◽  
Flight Test ◽  
Roll Angle ◽  
Guidance System ◽  
Circuit Board ◽  
Wind Condition ◽  
Flight Tests

This paper presents the design details and flight tests validation of printed circuit board fabricated micro gliders. The purpose of the micro glider is to be launched from a super pressure balloon at high altitude, glide to the target position to collect data and upload data to the staying balloon. The mission demand requires the micro glider to finish precise landing with small size and low fabrication cost. To complete this concept, we designed a PCB fabricated aircraft with limited sensors including GPS and IMU. The first part of the article describes the aerodynamic design methods. The second part introduced the control and guidance system design by controlling the roll angle and flight path angle to complete the precise landing. In the simulation results presented in the third part, launch with no wind condition shows desirable precise landing ability. As a contrast, wind direction and magnitude have significant effects on the guidance ability and accuracy. In the last part, two real flight tests conducted in Inner Mongolia of China are described to compare the flight performance with the current aerodynamics and control system design. Returned data indicated the micro gliders could successfully fly at high altitude. The control algorithm can compute the command roll angle only with GPS and IMU, but some design details still need to be improved to achieve precise landing ability.

scholarly journals Preliminary flight test correlations of the X-HALE aeroelastic experiment

2015 ◽  
Vol 119 (1217) ◽  
pp. 855-870 ◽  
Author(s):  
J. R. Jones ◽  
C. E. S. Cesnik
Keyword(s):  
High Altitude ◽  
Risk Reduction ◽  
Flight Test ◽  
Nonlinear Behaviour ◽  
Geometrically Nonlinear ◽  
University Of Michigan ◽  
Flight Tests ◽  
Remotely Piloted Aircraft ◽  
Long Endurance ◽  
The Way

AbstractAn experimental, remotely-piloted aircraft has been designed and fabricated at University of Michigan that is aeroelastically representative of very flexible aircraft. Known as X-HALE, this Experimental High-Altitude Long-Endurance aircraft exhibits geometrically nonlinear behaviour and displays specific aeroelastic characteristics designed into the experiment. This paper presents the data from the initial flight tests of the lightly instrumented X-HALE Risk Reduction Vehicle that confirm the expected aeroelastic characteristics. This opens the way for future flight tests with a fully-instrumented platform which will provide data to support validation of coupled, nonlinear aeroelastic/flight dynamic codes.

High Altitude Balloon Flight Test of the GRAD Experiment

1990 ◽  
Author(s):  
Robert J. Hicks ◽  
David H. Jenkins
Keyword(s):  
High Altitude ◽  
Flight Test ◽  
Balloon Flight

High altitude aircraft flight tests

1996 ◽  
Author(s):  
Henry Helmken ◽  
Peter Emmons ◽  
David Homeyer
Keyword(s):  
High Altitude ◽  
Flight Tests ◽  
Aircraft Flight

scholarly journals Sensitivity Analysis and Flight Tests Results for a Vertical Cold Launch Missile System

Aerospace ◽  
2020 ◽  
Vol 7 (12) ◽  
pp. 168
Author(s):  
Robert Głębocki ◽  
Mariusz Jacewicz
Keyword(s):  
Vision System ◽  
Flight Test ◽  
Measurement Unit ◽  
Flight Tests ◽  
Test Range ◽  
Roll Rate ◽  
Six Degree Of Freedom ◽  
Main Engine ◽  
Missile Test ◽  
Missile System

In vertical cold launch the missile starts without the function of the main engine. Over the launcher, the attitude of the missile is controlled by a set of lateral thrusters. However, a quick turn might be disturbed by various uncertainties. This study discusses the problem of the influences of disturbances and the repeatability of lateral thrusters’ ignition on the pitch maneuver quality. The generic 152.4 mm projectile equipped in small, solid propellant lateral thrusters was used as a test platform. A six degree of freedom mathematical model was developed to execute the Monte-Carlo simulations of the launch phase and to prepare the flight test campaign. The parametric analysis was performed to investigate the influence of system uncertainties on quick turn repeatability. A series of ground laboratory trials was accomplished. Thirteen flight tests were completed on the missile test range. The flight parameters were measured using an onboard inertial measurement unit and a ground vision system. It was experimentally proved that the cold vertical launch maneuver could be realized properly with at least two lateral motors. It was found that the initial roll rate of the projectile and the lateral thrusters ‘igniters’ uncertainties could affect the pitch angle achieved and must be minimized to reduce the projectile dispersion.

scholarly journals UAS as flexible and innovative test platform for aircraft configuration and systems testing

2018 ◽  
Vol 233 ◽  
pp. 00001
Author(s):  
Dominique Paul Bergmann ◽  
Jan Denzel ◽  
Andreas Strohmayer
Keyword(s):  
Financial Risk ◽  
New Technologies ◽  
Aircraft Design ◽  
Flight Test ◽  
Scale Model ◽  
Efficient Test ◽  
Consumption Reduction ◽  
Test Platform ◽  
Cost Efficient ◽  
Configuration Changes

Today new technologies are available, which can be decisive for the success of future aircraft design. However, the gap between conventional designs and new visions often comes with a high financial risk. This complicates the integration of innovations significantly. The “Flightpath 2050 Europe’s Vision for Aviation” asks for new aircraft concepts and configurations to meet future requirements such as emission (CO2, NOx), noise and fuel consumption reduction. Scaled UAS are one way for getting new configurations and technologies into flight test while reducing the risk of exploding costs. UAS are cost-efficient test platform systems for two main tasks of future aircraft tests: Testing new configurations and advancing new aircraft systems and technologies from upstream research to TRL5-6. UAS can represent a connection between innovative research and flight demonstration. This paper focuses on the UAS as an innovative test platform and a tool for feasibility demonstration as well as its impact on new technologies and the implementation of innovative concepts. An example of a UAS test platform is given in the paper based on a 33,3% scale model of the e-Genius. It is developed as flying wind tunnel in order to better understand the effects of configuration changes on flight performance.

Flight test of fault-tolerant flight control system using simple adaptive control with PID controller

2018 ◽  
Vol 90 (1) ◽  
pp. 210-218 ◽  
Author(s):  
Hidenobu Matsuki ◽  
Taishi Nishiyama ◽  
Yuya Omori ◽  
Shinji Suzuki ◽  
Kazuya Masui ◽  
...  
Keyword(s):  
Adaptive Control ◽  
Flight Control ◽  
Pid Controller ◽  
Control Method ◽  
Fault Tolerant ◽  
Flight Test ◽  
Static Stability ◽  
Flight Tests ◽  
Content Type ◽  
Sudden Reduction

Purpose This paper aims to demonstrate the effectiveness of a fault-tolerant flight control method by using simple adaptive control (SAC) with PID controller. Design/methodology/approach Numerical simulations and flight tests are executed for pitch angle and roll angle control of research aircraft MuPAL-α under the following fault cases: sudden reduction in aileron effectiveness, sudden reduction in elevator effectiveness and loss of longitudinal static stability. Findings The simulations and flight tests reveal the effectiveness of the proposed SAC with PID controller as a fault-tolerant flight controller. Practical implications This research includes implications for the development of vehicles’ robustness. Originality/value This study proposes novel SAC-based flight controller and actually demonstrates the effectiveness by flight test.

High Altitude Airship Flight Control System Design and Simulation

2011 ◽  
Vol 128-129 ◽  
pp. 142-145
Author(s):  
Yong Hua Fan ◽  
Xin Li ◽  
Yun Feng Yu
Keyword(s):  
Control System ◽  
High Altitude ◽  
System Design ◽  
Flight Control ◽  
Control System Design ◽  
Flight Control System ◽  
Compound Control ◽  
Control Scheme ◽  
Self Tuning

The high altitude airship can not have desired performance to control the altitude rapidly and accurately when the elevator or ancillary air bursa charge or deflation is used only, because the elevator has little efficiency when the velocity is low and auxiliary air bursas charge or deflation control is very slow. It is present a method to design flight control system for a high altitude airship using auxiliary air bursas charge or deflation and elevator combination control. This combination control scheme is that the ancillary air bursa and elevator are also used to control the airship attitude to get large raise velocity and the ancillary air bursa control is used to adjust the airship altitude for suspension. In this paper, a high altitude airship model with compound control of elevator and ancillary air bursa charge and deflation is given firstly. Then the combination controller is designed by using fuzzy self-tuning control. Finally, it has been proved by simulation that the flight control system has desirable performance and the compound control scheme is feasible.

A review of supersonic business jet design Issues

2007 ◽  
Vol 111 (1126) ◽  
pp. 761-776 ◽  
Author(s):  
H. Smith
Keyword(s):  
Global Economy ◽  
Aircraft Design ◽  
Flight Test ◽  
Specific Aspect ◽  
Air Travel ◽  
Sonic Boom ◽  
Enabling Technologies ◽  
Business Jet ◽  
Depth Analysis ◽  
Theoretical And Numerical Analysis

Abstract Key issues relating to the Supersonic Business Jet (SBJ) concept are reviewed with the intent to assess the readiness of enabling technologies and hence the concept itself. The multidisciplinary nature of aircraft design precludes an in-depth analysis of each specific aspect, which could individually be the subject of a separate discipline review, hence an overview is presented. The review looks at the market, environmental issues, with particular reference to the sonic boom phenomenon & solutions, technological issues, including prediction methods, flight testing, systems, certification and interested aerospace companies and design organisations. It is apparent that the need to reduce the sonic boom signature is vital if the vehicle is to be permitted to operate over land and hence be economically viable. It is clear that sonic boom acceptability requirements must be set if resources are to be effectively focused and designs are to converge. Despite this challenge, considerable investment is aimed at de-risking many of the enabling technologies and raising readiness levels. Many technologies are moving beyond theoretical and numerical analysis into the experimental and flight test domains. Collaboration between the civil and military sectors is increasing. Clearly, supersonic air travel is not an efficient means of personal conveyance; however, concerns for the environment are difficult to balance against the ‘value of time’ benefits offered by the SBJ concept. Air travel, of which this is a specialised form, is important to the global economy. Continued effort in the areas of human factors, customer demand and certification & requirements would be beneficial.

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