5 results about "Free flight" patented technology

This invention belongs to the field of hydraulic system technology and discloses an AI-based online monitoring method for external leakage in aircraft hydraulic systems. It aims to solve the technical problems of poor real-time performance, high false alarm rate, and difficulty in adapting to dynamic operating conditions in existing monitoring methods. The aircraft hydraulic system is the power source for critical functions such as door opening and closing, landing gear retraction and extension, braking, and control surface actuation. External leakage can easily lead to serious safety accidents. Existing monitoring methods have obvious defects, insufficient generalization ability, and inadequate real-time performance. The steps of this method are as follows: First, select multiple leak-free flight parameter data, extract multi-dimensional parameters such as pressure and temperature, and construct a feature vector set after preprocessing; second, based on AI algorithms, construct and train a fuel tank oil volume prediction model under leak-free operating conditions; third, input real-time collected multi-dimensional time-series data into the model and output the predicted oil volume value; finally, compare the predicted value with the measured value from the level sensor, determine the leakage status, sensor failure, or model deviation through the volume difference, and realize online model updates. This invention integrates multi-dimensional parameter features, improves the accuracy of leak identification and anti-interference ability, can output monitoring results in real time and provide early warning of leakage, enhances the robustness of hydraulic system leak monitoring, reduces operation and maintenance costs, and can provide technical support for early warning of leaks in aircraft hydraulic systems, thus having significant engineering application value.

The application relates to the technical field of airspace management, and provides a low-altitude airspace fine management method and system based on a four-dimensional airspace grid. According to a low-altitude airspace geographical boundary and a height level, three-dimensional space grid units are divided and a time dimension attribute is associated to form a four-dimensional airspace grid structure; candidate flight trajectories are generated in the structure; a conflict grid set is determined through traversal and matching; a grid unit sequence is adjusted in a conflict resolution search space, and a conflict-free flight path is generated; the grid units corresponding to the path are marked as occupied and are bound with aircraft identifiers, fine low-altitude airspace resource management is realized, and flight safety and airspace use efficiency are improved.

The present application relates to the artificial driving high bionic bird flapping wing vehicle, the vehicle is the ancient flapping wing machine and the combination of other power including but not limited to modern engine or motor, according to the various actions of the driver control from the ground take-off, air flight and landing to the ground, realize artificial driving free flight, the vehicle has the streamlined shell of bird, adjustable head and tail, the wings of bird wing on both sides of the body, cockpit and the accompanying landing driving part under the fuselage, the vehicle drives the wings on both sides of the fuselage to produce flying power by the power system, and freely flies by artificial control, can be used as low-altitude traffic transport and tourism tool.

This invention discloses a tethered unmanned aerial vehicle (UAV) airport system and its control method that automatically switches between tethered and free flight. The system includes an airport housing, an automatic cable reel assembly, an automatic cable disconnection and docking assembly, and an adaptable UAV. The airport housing integrates an automatic hatch, a liftable platform, a storage cavity, and charging and vehicle-mounted power supply interfaces. Both the hatch and platform are driven by stepper motors. The docking assembly is located inside the platform's conical cylinder, and the UAV has a pairing and locking mechanism and deformable landing gear, adaptable to fixed-point docking and ground landing. The system is linked by a PLC to various modules and the UAV flight controller, supporting vehicle-mounted manual / automatic control. The winch is powered by 400-900V DC output via AC-DC, and the onboard DC-DC converter provides battery charging. The PLC adjusts the cable reel speed based on tension sensor signals to stabilize tension. This invention significantly improves the scenario adaptability and operational efficiency of tethered UAV systems, meeting the engineering application requirements of various low-altitude operation scenarios.

Embodiments of the present disclosure provide a UAV path planning method based on an improved BIT* algorithm, applied to the technical field of UAV navigation and path planning. The method comprises receiving a starting point and an ending point of a current UAV, static constraint information, and dynamic state information of other UAVs in the airspace; fusing the static constraint information and the dynamic state information of the other UAVs to construct a unified three-dimensional space-time cost map; based on the starting point and the ending point of the current UAV, an improved BIT* algorithm is used to search for a path on the three-dimensional space-time cost map to generate an initial planning path of the current UAV; based on the dynamic state information of the other UAVs, future trajectories of the other UAVs are predicted, and based on the trajectories, space-time conflict detection is performed on the initial planning path; if potential conflict is detected, a cooperative conflict resolution operation is performed to generate a conflict-free flight path. In this way, the UAV can achieve efficient, safe and smooth flight in a complex dynamic multi-constraint environment.