Abstract:
A method and computer program product are provided for controlling the actuators of an aerodynamic vehicle to affect a desired change in the time rate of change of the system state vector. The method initially determines the differences between anticipated changes in the states of the aerodynamic vehicle based upon the current condition of each actuator, and desired state changes. The differences between the anticipated and desired state changes may be weighted based upon a predetermined criteria, such as the importance of the respective states and/or the weight to be attributed to outliers. The differences between the anticipated and desired state changes are converted to the corresponding rates of change of the actuators. These changes in the actuators may be limited to within predefined bounds. Control signals are then issued to the actuators to affect the desired change in the time rate of change of the system state vector.
Abstract:
A method and computer program product are provided for estimating the states of a dynamic system based upon a combination of first and second feedback signals. The first feedback signal is based upon anticipated state changes and is typically represented by a state propagation model. The second feedback signal is based upon the difference between the anticipated and actual measurements of the sensors. This difference may be weighted based upon a predetermined criteria, such as the credibility of the actual measurements and/or the degree to which outlying sensor measurements are to be discounted. The weighted difference is converted into a corresponding change in the state estimates. At least one feedback signal may then be modified to define its relative contribution to the state estimates. The first and second feedback signals are thereafter combined to produce the state estimates, subject generally to limitations upon the permissible changes in the state estimates.
Abstract:
Methods and computer program products are provided for controlling a plurality of control effectors of an aerodynamic vehicle based upon the mode shape direction of one or more structural modes excited by actuation of the control effectors. For example, control of the actuation of the control effectors may be provided to emphasize actuation of those control effectors that affect a structural mode having a mode shape direction that is substantially orthogonal to the mode shape of the structural mode. By affecting a structural mode in such a manner that the mode shape direction is substantially orthogonal to the mode shape of the structural mode, control structure interaction (CSI) is avoided without having to design a stiffer aerodynamic vehicle and without having to filter the sensor input and/or the actuator commands, unless it is otherwise desirable to do so.
Abstract:
An air vehicle assembly and a corresponding method for launching an air vehicle assembly are provided, along with corresponding control systems and methods. The air vehicle assembly may include a plurality of air vehicles releasably joined to one another during a portion of the flight, such as during take-off and landing. By being releasably joined to one another, such as during take-off and landing, the air vehicles can rely upon and assist one another during the vertical take-off and landing while being designed to have a greater range and higher endurance following the transition to forward flight, either while remaining coupled to or following separation from the other air vehicles. By taking into account the states of the other air vehicles, the control system and method also permit the air vehicles of an air vehicle assembly to collaborate.
Abstract:
A flashing beacon may include a signal unit, a control unit associated with the signal unit, a solar panel or collector, and an activation device that may all be mounted or otherwise positioned on a post of a roadway sign. Light units associated with the signal unit may be programmed to flash on and off in a unique wig-wag pattern. Further, a light bar may also be used with the beacon to generate an intense flash of light soon after activation of the beacon as an additional means of grabbing the attention of the operator of a vehicle.
Abstract:
The system and method described herein may activate an automatic provisioning system within customer premise equipment via a digital subscriber line, cable modem, or other residential hub or gateway interface and access a remote directory service to locate appropriate addressing and other information to initialize the customer premise equipment. The gateway interface may automatically update a configuration, heal bugs, and perform other maintenance and tasks to manage the customer premise equipment. Multiple gateway interfaces or products or services associated therewith may be configured at one premise and version control may be maintained to ensure compatibility.
Abstract:
A flashing beacon may include a signal unit, a control unit associated with the signal unit, a solar panel or collector, and an activation device that may all be mounted or otherwise positioned on a post of a roadway sign. Light units associated with the signal unit may be programmed to flash on and off in a unique wig-wag pattern. Further, a light bar may also be used with the beacon to generate an intense flash of light soon after activation of the beacon as an additional means of grabbing the attention of the operator of a vehicle.
Abstract:
Disclosed are improved optical detection systems and methods comprising interferometric detection systems, methods for determining a characteristic property of a fluid, methods for calculating a shift between at least two signals, computer program products encoded in a computer readable medium, and computational systems. Also disclosed are label-free, free-solution, and/or real-time measurements of characteristic properties and/or chemical events using the disclosed techniques. Also disclosed are various biosensor applications of the disclosed techniques. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.
Abstract:
A residential HVAC system includes a heat pump having a compressor arranged to heat a domestic hot water vessel and to heat or cool a storage vessel which is connected to a heat exchanger within the residence. Temperature sensors are provided at critical locations throughout the system and current and voltage sensors are coupled to the power lines feeding the residence. A microprocessor controls the operation of the compressor and other components of the heat pump system in response to measured tempertures, in response to the level of energy supplied to the residence and in response to the existence of on- or off-peak time intervals to operate the compressor and/or resistive heating elements to condition the hot water and storage vessels for subsequent use and to control an interior fan to condition the space. Operation of the compressor is controlled during on-peak intervals as a function of the resident's life style as reflected in power usage and requested comfort level.
Abstract:
A distress light and signal system including a light adapted to be anchored in the ground in proximity to a road passing by a house. The light includes a switch for selectively actuating the light in an emergency from within the house and is powered by a solar collector and a rechargeable battery. Information is retained at a location remote from the house including directions for use by a person responding to the emergency. The system includes immediate retrieval of the information upon notification of the existence of an emergency at the house. With these features, a person responding to an emergency may reach the house rapidly by visually locating the light upon reaching the vicinity of the house.