The measurement and control of helicopter blade modal response using blade-mounted accelerometersThe measurement of helicopter blade flapping, bending, and lag modal acceleration and displacement response using blade-mounted accelerometers is described. It is shown that knowledge of the blade mode shapes is sufficient to permit separation of the modal contributions to the accelerometer signals using matrix inversion. The application of the Mckillip (1985) filter to the identification of modal rate response is described. Finally, the design of flapping, bending, and lag mode controllers utilizing the conventional mesh plate is presented. The measurement technique is illustrated using flight test results obtained using a Black Hawk helicopter.
Document ID
19890035935
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Ham, Norman D. (MIT Cambridge, MA, United States)
Balough, Dwight L. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Talbot, Peter D. (NASA Ames Research Center Moffett Field, CA, United States)