Abstract: Structural health monitoring and protection systems and methods are provided. System and methods utilize structural information and/or enhanced built in testing capabilities for detecting failure modes that may cause damage to a structure. Systems and methods herein may protect a structure by mitigating one or more incorrect forces. The structure may be an aircraft, a rotary wing aircraft, or any other physical structure subject to vibrations and receptive to canceling of those vibrations.

Abstract: Devices, systems, and related methods for balancing two or more pieces of independently rotating (e.g., not synchrophased) machinery are provided. In some aspects, the devices, systems, and methods can provide improved balancing techniques and can include providing a controller configured to simultaneously measure/receive vibration data and control balancers, one balancer at a time. In some aspects, the controller can calculate a beating cycle or a beating period using vibration data received from multiple rotating machines. In some aspects, a balance correction command can be derived in part from either one of: (a) an interpolation of an average vibration of the first rotating machine from a complex vibration of the multiple rotating machines or (b) an average vibration derived from one or more rules applied based upon the duration of the beating period or the beating cycle.

Abstract: Structural health monitoring and protection systems and methods are provided. System and methods utilize structural information and/or enhanced built in testing capabilities for detecting failure modes that may cause damage to a structure. Systems and methods herein may protect a structure by mitigating one or more incorrect forces. The structure may be an aircraft, a rotary wing aircraft, or any other physical structure subject to vibrations and receptive to canceling of those vibrations.

Abstract: Active vibration control systems (100) and methods are provided herein. Systems (100) are expandable and include a plurality of vibration control devices (110) and at least a first controller (102) digitally linked with a second controller (104) via an interface (108). The first and the second controllers exchange information for generation of a force control command (FCC) either the first or second controller. The FCC is then executed at a first vibration control device (110) of the plurality of vibration control devices (FG) for providing active vibration control within a vehicle. A method of providing vibration control in a vehicle includes providing a plurality of active vibration control devices (100) and providing at least a first controller (102) digitally linked with a second controller (104). The method further includes generating a FCC using information exchanged between the first and the second controllers.

Abstract: Active vibration control systems (100) and methods are provided herein. Systems (100) are expandable and include a plurality of vibration control devices (110) and at least a first controller (102) digitally linked with a second controller (104) via an interface (108). The first and the second controllers exchange information for generation of a force control command (FCC) either the first or second controller. The FCC is then executed at a first vibration control device (110) of the plurality of vibration control devices (FG) for providing active vibration control within a vehicle. A method of providing vibration control in a vehicle includes providing a plurality of active vibration control devices (100) and providing at least a first controller (102) digitally linked with a second controller (104). The method further includes generating a FCC using information exchanged between the first and the second controllers.

Abstract: Devices, systems, and related methods for balancing two or more pieces of independently rotating (e.g., not synchrophased) machinery are provided. In some aspects, the devices, systems, and methods can provide improved balancing techniques and can include providing a controller configured to simultaneously measure/receive vibration data and control balancers, one balancer at a time. In some aspects, the controller can calculate a beating cycle or a beating period using vibration data received from multiple rotating machines. In some aspects, a balance correction command can be derived in part from either one of: (a) an interpolation of an average vibration of the first rotating machine from a complex vibration of the multiple rotating machines or (b) an average vibration derived from one or more rules applied based upon the duration of the beating period or the beating cycle.

Abstract: Coherence optimization is provided in an active adaptive control system. The adaptive control model (16) has a model input (18) receiving a reference signal (8) from a reference input transducer (4), an error input (20) receiving an error signal (14) from an error transducer (10), and a model output (22) outputting a correction signal (24) to an output transducer (26) to introduce a control signal matching the system input signal (6) to minimize the error at the error input. Coherence in the system is determined, and a coherence filter (27; 28; 29) is provided according to the determined coherence. Preferably, one or more of the error signal (14), reference signal (8) and correction signal (24) is coherence filtered.