Sheharyar Malik, Luca Riccobene, Sergio Ricci, Daniele Monti

DOI Number: N/A

Conference number: IFASD-2017-122

This paper presents the numerical and experimental research activity aiming at the implementation of a Buffet Load Mitigation System (BLMS). Motivated by the advantages associated with the multi surface control, movable leading and trailing edges are actively controlled through static output feedback suboptimal controller. Scaled wing model of X-DIA was analyzed numerically for structural, aerodynamic and aeroelastic analysis by using MSC/NASTRAN. State space realization was completed by in-house built aeroelastic software MASSA founded on MATLAB. Deterministic and probabilistic optimization algorithms optimized the suboptimal controller. Levenberg-Marquardt algorithm founded on second order quadratic formulation ousted further candidates for its robustness and efficiency. Hankel singular values (HSV) validated the sensor/actuator configuration on the wing, precedingly configured on the principle of Identical location of Actuator and Sensor (ILAF) law. HSV defined the unified theme in comparative study of the wing. Application of notch filters on the output feedback and uncertainties were incorporated in the model by built-in MATLAB functions. Robustness of the BLMS under uncertainties was experimentally realized by changing sensitivity of accelerometers and incorporating efficiency factor with the output of PID2. Numerical analyses predicted good performance for wind tunnel experiments. Airbrake installed upstream of the wing replicated the buffet loads in the wind tunnel test section. Considerable attenuation was demonstrated for wing first bending and torsion modes by the active control systems. Power spectral estimates and densities and frequency response are presented to highlight the achieved results.

Read the full paper here

In Categories: 1. IFASD 2017, 1.Events, Active Control and Adaptive Structures
Email
Print
LinkedIn
The paper above was part of  proceedings of a CEAS event and as such the author has signed a publication agreement to have their paper published in the repository. In the case this paper is found somewhere else CEAS always links to the other source.  CEAS takes great care in making the correct content available to the reader. If any mistakes are found  in the listings please contact us directly at papers@aerospacerepository.org and we will correct the listing promptly.  CEAS cannot be held liable either for mistakes in editorial or technical aspects, nor for omissions, nor for the correctness of the content. In particular, CEAS does not guarantee completeness or correctness of information contained in external websites which can be accessed via links from CEAS’s websites. Despite accurate research on the content of such linked external websites, CEAS cannot be held liable for their content. Only the content providers of such external sites are liable for their content. Should you notice any mistake in technical or editorial aspects of the CEAS site, please do not hesitate to inform us.