Joint Motion Control and Control Allocation Design for UAS Flight Control Systems

2011 ◽  
Author(s):  
Tristan Perez ◽  
Alejandro Donaire ◽  
Pierre De Lamberterie ◽  
Brendan Williams
Keyword(s):  
Control Systems ◽  
Motion Control ◽  
Flight Control ◽  
Control Allocation ◽  
Joint Motion ◽  
And Control

Airworthiness aspects of new technologies: Interaction between aircraft structural dynamics and control systems

1998 ◽  
Vol 212 (5) ◽  
pp. 309-317 ◽  
Author(s):  
M Hockenhull
Keyword(s):  
Control Systems ◽  
Structural Dynamics ◽  
Flight Control ◽  
Closed Loop ◽  
New Technologies ◽  
Loop Control ◽  
Transport Aircraft ◽  
Control Load ◽  
Dynamics And Control ◽  
And Control

The application of electrical flight control systems to civil transport aircraft has directed attention to the need for improved airworthiness regulation. In this paper, the scope and interpretation of a new FAR/JAR Part 25 regulation in preparation is discussed, applicable to aircraft that have closed-loop control systems for flight control, load alleviation or stability augmentation, and have the potential to interact with the aircraft's structural dynamics.

scholarly journals Two Reconfigurable Flight-Control Design Methods: Robust Servomechanism and Control Allocation

2001 ◽  
Vol 24 (3) ◽  
pp. 482-493 ◽  
Author(s):  
John J. Burken ◽  
Ping Lu ◽  
Zhenglu Wu ◽  
Cathy Bahm
Keyword(s):  
Flight Control ◽  
Control Design ◽  
Design Methods ◽  
Control Allocation ◽  
And Control

scholarly journals THE POSSIBILITIES OF CHOSEN APPLICATIONS OF CONTROL AND NAVIGATION SYSTEMS IN GENERAL AVIATION AIRCRAFT AND UNMANNED AIR VEHICLES

Aviation ◽  
2007 ◽  
Vol 11 (2) ◽  
pp. 23-30 ◽  
Author(s):  
Jan Gruszecki ◽  
Andrzej Tomczyk ◽  
Boguslaw Dołega ◽  
Tomasz Rogalski ◽  
Pawel Rzucidło
Keyword(s):  
Control Systems ◽  
Flight Control ◽  
Mechanical Engineering ◽  
General Aviation ◽  
Parameter Measurement ◽  
Navigation Systems ◽  
Technology Research ◽  
University Of Technology ◽  
And Control ◽  
Air Vehicles

The development of informatics and sensor techniques has extended the possibilities of flight parameter measurement. It allows for extensive modification of control and navigation systems in air vehicles. This advance can also be noticed in the research of the Department of Avionics and Control at the Faculty of Mechanical Engineering and Aeronautics, Rzeszow University of Technology. Research in the area of digital flight control systems was initiated at the Department of Avionics and Control over twenty years ago.

Artificial Hair Sensors: Electro-Mechanical Characterization

2014 ◽  
Author(s):  
David M. Phillips ◽  
Keith A. Slinker ◽  
Cody W. Ray ◽  
Benjamin J. Hagen ◽  
Jeffery W. Baur ◽  
...  
Keyword(s):  
Control Systems ◽  
Flight Control ◽  
Mechanical Characterization ◽  
Glass Fibers ◽  
Fused Silica ◽  
Control Algorithms ◽  
Resistance Change ◽  
Micron Diameter ◽  
And Control ◽  
Hair Sensors

Performance demands of future unmanned air vehicles will require rapid autonomous responses to changes in environment. Towards this goal, we expect that the next generation flight control systems will include advanced sensors beyond the contemporary array. One promising scenario correlates measurements of flow footprints over aircraft surfaces with aerodynamic data to aid navigation and feedback control algorithms. As a sensor for this concept, we construct artificial hair sensors (AHSs) based on glass microfibers enveloped in an annular, radially-aligned piezoresistive carbon nanotube (CNT) forest to measure air flow in boundary layers. This study includes an analysis of the sensitivity based on laboratory scale electromechanical testing. The sensors in this work utilize nine micron diameter S2 glass fibers as the sensing mechanism for coupling to boundary layer air flows. The annular CNT forest resides in a fused silica microcapillary with electrodes at the entrance. The sensor electrical transduction mechanism relies on the resistance change of the CNT forest due to changes in both the bulk and contact resistance as a function of mechanical loading on the fiber. For the electromechanical analysis, the sensors are controllably loaded to measure both the force and moment acting at the base of the hair and the resulting deflection of the CNT forest inside of the microcapillary is measured to estimate the stress on the forest and the pressure between the forest and the electrode. The electrical responses of the sensors are compared to the mechanical state of the CNT forest. This work represents the development of a characterization tool to better understand and control the response of CNT based AHSs.

scholarly journals Human Simulated Intelligent Control with Double-Direction Dead-Zone Compensation for Joint Motion Control of a Large-Sized Boom System

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Rongsheng Liu ◽  
Yingjie Gao ◽  
Yulin Yang ◽  
Yanlong Liu
Keyword(s):  
Motion Control ◽  
Intelligent Control ◽  
Dead Zone ◽  
Control Mode ◽  
Joint Motion ◽  
Compensation Scheme ◽  
Negative Effects ◽  
Proportional Valve ◽  
Control Scheme ◽  
And Control

Joint motion control of a 52-meter-long five-boom system driven by proportional hydraulic system is developed. It has been considered difficult due to strong nonlinearities and parametric uncertainties, the effect of which increases with the size of booms. A human simulated intelligent control scheme is developed to improve control performance by modifying control mode and control parameters. In addition, considering the negative effects caused by frequent and redundant reverse actions of the proportional valve, a double-direction compensation scheme is proposed to deal with the dead-zone nonlinearity of proportional valve. Sinusoidal motions are implemented on a real boom system. The results indicate that HSIC controller can improve control accuracy, and dead-zone nonlinearity is effectively compensated by proposed compensation scheme without introducing frequent reverse actions of proportional valve.

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