# US 2013/0240302 A1 · Method And System For Active Noise Or Vibration Control Of Systems > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0240302 A1 - Document ID: US20130240302A1 - Status: Published application - Kind: A1 - Application number: 13/990,117 - Filed: 2010-11-30 - Published: 2013-09-19 - Earliest claimed: 2010-11-30 - Assignees: Otis Elevator Company - Inventors: Arthur Blanc; Vladimir Blasko - Web page: https://patentgrep.com/patent/US20130240302A1 ## CPC - B66B 1/30: effective on driving gear {, e.g. acting on power electronics, on inverter or rectifier controlled motor} - B66B 7/00: Other common features of elevators - G01H 1/12: of longitudinal or not specified vibrations - G01H 3/00: Measuring {characteristics of} vibrations by using a detector in a fluid (G01H7/00, G01H9/00, G01H11/00 take precedence) - B66B: ELEVATORS; ESCALATORS OR MOVING WALKWAYS ({apparatus for raising or lowering persons on theatrical stages or the like A63J5/12} ; funicular railbound systems with rigid ground-supported tracks and cable traction, e.g. cliff railways, B61B9/00; arrangements of ammunition handlers in vessels B63G3/00; hoists, lifts, or conveyors for loading or unloading in general B65G; braking or detent devices controlling normal movements of winding drums or barrels B66D; ship-lifting devices E02C; garages for many vehicles with mechanical means for lifting vehicles E04H6/12; hoists for feeding ammunition or projectiles to launching apparatus or to loading mechanisms F41A9/00) - G01H: MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES ## Abstract A system for active control of noise and/or vibration includes an electric machine; at least one sensor for sensing at least one of noise and vibration in the machine and generating at least one of an audio signal representing noise and a vibration signal representing vibration; a controller obtaining at least one of the noise signal and the vibration signal, the controller generating control signals to reduce at least one of noise and vibration in the machine; and power electronics receiving the control signals and generating drive signals for the machine. ## Claims ### Claim 1 A system for active control of noise and/or vibration, comprising: an electric machine; at least one sensor for sensing at least one of noise and vibration in the machine and generating at least one of an audio signal representing noise and a vibration signal representing vibration; a controller obtaining at least one of the noise signal and the vibration signal, the controller generating control signals to reduce at least one of noise and vibration in the machine; and power electronics receiving the control signals and generating drive signals for the machine. ### Claim 2 (depends on 1) The system of claim 1 wherein: the machine is part of an elevator system and includes a motor and a traction sheave, the drive signals applied to the motor reduce noise or vibration in the machine. ### Claim 3 (depends on 1) The system of claim 1 wherein: the at least one sensor generating the noise signal is an audio sensor. ### Claim 4 (depends on 1) The system of claim 1 wherein: the at least one sensor generating the vibration signal is an accelerometer. ### Claim 5 (depends on 1) The system of claim 1 wherein: the at least one sensor generating the vibration signal is mounted to a bedplate of the machine. ### Claim 6 (depends on 1) The system of claim 1 wherein: the controller obtains a speed value indicative of a speed of the machine, the controller generating the control signals in response to the speed value and at least one of the noise signal and the vibration signal. ### Claim 7 (depends on 6) The system of claim 6 wherein: the controller obtains the speed value internally. ### Claim 8 (depends on 6) The system of claim 6 wherein: the controller obtains the speed value from an encoder in the machine. ### Claim 9 (depends on 6) The system of claim 6 wherein: the controller generates control signals to reduce at least one of noise and vibration in the machine in response to the audio signal, vibration signal and speed value. ### Claim 10 (depends on 1) The system of claim 1 wherein: the control signals include an operational component for imparting motion to the machine and a correction component to reduce at least one of noise and vibration in the machine. ### Claim 11 A method for active control of noise and/or vibration in a system, the method comprising: sensing at least one of noise and vibration at an electric machine to generate at least one of a noise signal and a vibration signal; generating control signals to reduce at least one of noise and vibration in the machine in response to at least one of the noise signal and the vibration signal; and generating drive signals for the machine in response to the control signals. ### Claim 12 (depends on 11) The method of claim 11 further comprising: applying the drive signals to a motor in the machine to reduce at least one of noise and vibration in the machine. ### Claim 13 (depends on 11) The method of claim 11 wherein: sensing vibration is performed at a bedplate of the machine. ### Claim 14 (depends on 11) The method of claim 11 further comprising: obtaining a speed value indicative of a speed of the machine, the generating the control signals to reduce at least one of noise and vibration in the machine is performed in response to the speed value and at least one of the noise signal and the vibration signal. ### Claim 15 (depends on 14) The method of claim 14 wherein: obtaining the speed signal is performed internally by a controller. ### Claim 16 (depends on 14) The method of claim 14 wherein: obtaining the speed signal is performed in response to an encoder in the machine. ### Claim 17 (depends on 14) The method of claim 14 wherein: generating control signals is performed in response to the audio signal, vibration signal and speed value. ### Claim 18 (depends on 11) The method of claim 11 wherein: the control signals include an operational component for imparting motion to the machine and a correction component to reduce at least one of noise and vibration in the machine. ### Claim 19 (depends on 11) The method of claim 11 wherein: the sensing step senses a machine of an elevator system that imparts motion to an elevator car.