5results about How to "Good followability" patented technology

An image display device and a method for manufacturing the image display device are provided, which improve the tracking accuracy of an optical laminate relative to a three-dimensional curved surface. The image display device according to an embodiment of the present invention includes a transparent member, an optical laminate, and an image display panel. The transparent member has a three-dimensional curved surface. The optical laminate is attached to the three-dimensional curved surface. The image display panel is located on the opposite side of the three-dimensional curved surface relative to the optical laminate. The optical laminate includes a first adhesive layer, a polarizer, and a second adhesive layer. The first adhesive layer is in contact with the three-dimensional curved surface. The second adhesive layer is in contact with the image display panel. The image display device satisfies the following formula (1). R 2 ×(d1+d2) / 1000>310···(1)(In formula (1), R represents the radius of curvature of the three-dimensional surface [mm], d1 represents the thickness of the first adhesive layer [μm], and d2 represents the thickness of the second adhesive layer [μm]. )

This invention discloses a group train tracking operation optimization method considering communication delay, comprising the following steps: establishing a heavy-haul railway train group with a "leader-follower" topology; constructing a multi-objective optimization model based on vehicle characteristic constraints, speed limits, and safety distance constraints; generating random communication delays in the model, calculating the time steps corresponding to the delays, and having the following train make control decisions based on the state information of the preceding train at the previous time step; and solving for the running speed of the following train in the multi-objective optimization model using a particle swarm optimization algorithm. This group train tracking operation optimization method effectively solves the problems of uncertainty and dynamic response lag caused by communication delays during the tracking operation of heavy-haul railway train groups. It can not only significantly reduce tracking errors between trains and improve speed synchronization, but also effectively reduce distance fluctuations during acceleration and deceleration phases, ensuring stable train spacing.

The utility model discloses a kind of torsional center of mass stick for seat safety belt fixing point test, it is related to automobile seat safety belt fixing point test technical field, including rubber stick body, the metal stick body connected with rubber stick body both ends, metal stick body is equipped with the fixed block for connecting seat, the connecting hole for connecting loading equipment;A kind of torsional center of mass stick for seat safety belt fixing point test of the utility model, precise transmission of test load and backrest deformation self-adaptation are realized by metal and rubber composite structure, backrest deformation followability is strong, compared with rigid center of mass stick, the interference effect of rigid center of mass stick to seat structure is eliminated, prevent center of mass stick from falling off in test process, improve test efficiency and accuracy.

This invention relates to an automatic landing method and system for unmanned aerial vehicles (UAVs). The method includes: acquiring and calculating the position of the UAV based on real-time visible light images and real-time infrared images to obtain a first calculated position and a second calculated position; fusing the ranging distance, the first calculated position, and the second calculated position according to a fusion strategy to obtain a fused position of the UAV, thereby guiding the UAV to land in a target area. The fusion strategy includes: when both the first and second calculated positions are obtained simultaneously, using either the first calculated position or the second calculated position as the fused position based on the error between the first calculated position and the ranging distance; when the real-time visible light images and real-time infrared images are incomplete, and the ranging distance of the UAV is less than a second preset value, using either the first calculated angle or the second calculated angle, along with the ranging distance, as the fused position. The method of this invention can improve the positioning and recognition accuracy and reliability during the UAV landing process.