VERFAHREN UND GERÄT ZUR SCHWINGUNGSVERMINDERUNG EINES ROTORS UND DER ZUGEHÖRIGEN ANLAGE ÜBER DEM VOLLEN VERWENDUNGSBEREICH

• Main Authors: VENTRES, CHARLES, S., CAMBRIDGE, MA 02139, US, FLOYD, MERVYN, D., NASHUA, NH 03602, US, DIMARCO, WILLIAM, J., PORTSMOUTH, RI 02871, US, HAYDEN, RICHARD, E., SUDBURY, MA 01776, US
• Format: Patent
• Language: German
• Published: 13.07.1995
• Edition: 6
• Subjects: AEROPLANES; AIRCRAFT; AVIATION; BLASTING; CONTROLLING; COSMONAUTICS; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HELICOPTERS; LIGHTING; MEANS FOR DAMPING VIBRATION; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PHYSICS; REGULATING; SHOCK-ABSORBERS; SPRINGS; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES; THERMAL INSULATION IN GENERAL; TRANSPORTING; WEAPONS

Disclosed is a system and method for minimizing vibration over the full operating range of a rotor of an apparatus. The system includes a transducer or an array of transducers for resolving up to six degrees of freedom of motion of a rotor support structure. In one embodiment the transducer is a six degree of freedom accelerometer located near the center of gravity of the structure. In addition to the motion transducer, a shaft position reference sensor is connected to the shaft of the rotor and/or rotor support structure. A signal processor that receives signals from the transducer and the shaft position reference sensor produces Fourier coefficients of motion occurring in each degree of freedom. The system utilizes analytical models or empirically derived data to describe the Fourier coefficients of acceleration (or strain) resulting from each of the available rotor adjustments. The system and method also utilizes an analytical or computational optimization scheme which computes the best combination of rotor adjustments to meet criteria specified by the user. This best combination is used to designate the appropriate adjustments.