摘要:
A control system for a tethered aerostat is provided, where up to two rotational and at least one translational degree of freedom are controlled to setpoints through the variation of tether lengths by an actuator system. The term tether includes a single tether, a tether group or a sub section of tether controlled by an individual actuator. Accurate rotational and translational control is essential for the successful operation of an aerostat under several applications, including surveillance, weather monitoring, and power generation. For a given use case, the controller can be constructed and arranged to manage the tradeoff between several key performance characteristics, such as transient performance, steady-state pointing accuracy, tether tension regulation, and power generation.
摘要:
Embodiments disclosed herein enable routine autonomous execution of at least some major phases of aerostat operation in response to commands from human or automated external operators, a built-in decision-making capacity, or both. Various embodiments combine one or more actively controlled tethers, aerodynamic aerostat control surfaces, mechanical assistive devices (e.g., jointed arms attached to a ground station), and/or active propulsors attached to the aerostat to govern aerostat behavior during launch, flight, and landing phases of operation. Some embodiments enable automatic autonomous performance of all phases of routine post-commissioning aerostat operation, including launch, flight, and landing, without any routine need for availability of a human crew.
摘要:
A control system for a tethered aerostat is provided, where at least one rotational and at least one translational degree of freedom are controlled to setpoints through the variation of tether lengths by an actuator system. The term tether includes a single tether, a tether group or a sub section of tether controlled by an individual actuator. Accurate rotational and translational control is essential for the successful operation of an aerostat under several applications, including surveillance, weather monitoring, communications, and power generation. For a given use case, the controller can be constructed and arranged to manage the tradeoff between several key performance characteristics, such as transient performance, steady-state pointing accuracy, tether tension regulation, and power generation.
摘要:
According to at least one aspect, a large area wireless communication station is provided. The wireless communication station may provide mobile communication signals at distances up to (100) kilometers from the location of the station. The wireless communication station may include a plurality of antennas that are co-located and configured to each provide coverage to a portion of a coverage area and in sum to provide coverage to the entirety of the coverage area, a plurality of transmitters communicatively coupled to the plurality of antennas and configured to communicate with an external system, and a signal routing system configured to dynamically direct a radio frequency signal from any one or more of the plurality of transmitters to any one or more of the plurality of antennas.
摘要:
The invention provides an improved aerostat system including an aerostat, multiple tether groups and a base station. Spatially distinct tether groups allow for improved stability and controllability over a wide range of wind conditions. Independent actuation of the tether groups allows for control of the aerostat pitch and roll angle. A rotating platform including rails to rest the aerostat allows docking without auxiliary tethers, minimizing or eliminating the ground crew required to dock traditional aerostat systems. An optional controller allows remote or autonomous operation of the aerostat system. The invention is intended to extend the flight envelope in which aerostat systems can safely operate.
摘要:
A control system for a tethered aerostat is provided, where at least one rotational and at least one translational degree of freedom are controlled to setpoints through the variation of tether lengths by an actuator system. The term tether includes a single tether, a tether group or a sub section of tether controlled by an individual actuator. Accurate rotational and translational control is essential for the successful operation of an aerostat under several applications, including surveillance, weather monitoring, communications, and power generation. For a given use case, the controller can be constructed and arranged to manage the tradeoff between several key performance characteristics, such as transient performance, steady-state pointing accuracy, tether tension regulation, and power generation.
摘要:
A wind-based power generating system provides a wind energy converter for converting wind energy into another form of energy using a lighter-than-air craft configured to produce a positive net lift. The net lift includes both a net aerodynamic lift and a net buoyant lift. A tethering mechanism is configured to restrain the lighter-than-air craft with respect to the ground. The lighter-than-air craft defines an interior volume for containing a lighter-than-air gas, and the lighter-than-air craft has a fore section and an aft section. The tethering system has at least one attachment point on the fore section of the lighter-than-air craft and at least one attachment point on the aft section of the lighter-than-air craft. The lighter-than-air craft provides a stable aerodynamic moment with respect to a yaw axis about a center-of-mass of the lighter-than-air craft. The craft can be formed in a variety of aerodynamic profiles/shapes.
摘要:
This invention provides a configuration of suspension lines, anchored with respect to an inner surface of an LTA structure, and which provide reactive forces between an LTA structure and its payload so as to constrain the translational and rotational motion of the payload to be nearly rigid with respect to the LTA structure. Illustratively, the configuration constrains the motion of the payload with respect to the LTA structure along all six degrees of freedom: e.g. horizontal, vertical and longitudinal translation and rotation about the longitudinal, horizontal and vertical axes.