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http://dx.doi.org/10.5139/JKSAS.2017.45.10.863

Accelerometer Signal Processing for a Helicopter Active Vibration Control System  

Kim, Do-Hyung (Korea Aerospace Research Institute)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.45, no.10, 2017 , pp. 863-871 More about this Journal
Abstract
LMS (least mean square) algorithm widely used in the AVCS (active vibration control system) of helicopters calculates control input using the forward path transfer function and error signal. If the error signal is sinusoidal, it can be represented as the combination of cosine and sine functions with frequency and phase synchronized with the reference signal. The control input also has the same frequency, therefore control algorithm can be simply implemented if the cosine and the sine amplitudes of the control input are calculated and the frequency and phase of the reference signal are used. Calculation of the control input is implemented as simple matrix operation and the change of the control command is slower than the frequency of the error signal, consequently control algorithm can be operated at lower frequency. The signal processing algorithm extracting cosine and sine components of the error signals are modeled using Simulink and PIL (processor-in-the-loop) mode simulation was executed for real-time performance evaluation.
Keywords
Active Vibration Control System; Least-Mean-Square; Signal Processing; Processor In the Loop; Execution Timing Analysis;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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