Helicopter Flight Dynamics Using Linear and Nonlinear Analyses
This paper compares measures derived from linear power spectral analysis and nonlinear chaotic analysis of helicopter vibratory data obtained during different flight tests. In particular, the strange attractor behavior of the trajectory of reconstructed state vectors in phase space was examined and quantified using the correlation dimension, which provides a fractal dimension measure in regards to the number of active degrees of freedom of helicopter vibration. We have examined the helicopter vibratory data collected from a well tuned fourblade servo-flap rotor system conducting hover, low-speed, and cruising-speed forward flights. In this paper, we examined servoflap mid-span bending and rotor blade flat-wise bending. The results have shown that during helicopter hover, vibratory data of servo-flap bending and rotor flat-wise bending are more random than chaotic. On the other hand, the complexity (fractal dimension) of vibratory data increase when the helicopter switched from the minimum forward speed flight to cruisingspeed forward flight.
Servo-flap helicopter flight vibration power spectrum correlation dimension
Taikang Ning John F.Wei Rong-Huei Chen Chia-Wei Huang Ting-Yu Ho
Department of Engineering, Trinity College, Hartford, Connecticut, USA Department of Electrical Engi Department of Mechanical Engineering, Central Connecticut State University, New Britain, USA Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan
国际会议
2010 IEEE 10th International Conference on Signal Processing(第十届信号处理国际会议 ICSP 2010)
北京
英文
9-12
2010-08-24（万方平台首次上网日期，不代表论文的发表时间）