Abstract: An SMA wire driving device, a closed-loop control method thereof and an electronic device are provided, which relates to the technical field of actuators. The SMA wire driving device includes a stationary part, a movable part being movable relative to the stationary part, and an SMA wire configured to drive the movable part to move relative to the stationary part, where a sampling resistor is connected in series with the SMA wire. By the SMA wire driving device, a displacement of the movable part relative to the stationary part can be detected by acquiring a voltage of the sampling resistor connected in series with the SMA wire. Based on the SMA wire driving device, a closed-loop control method is further provided, which has a small computation amount, so that the SMA wire can be rapidly controlled, improving driving effect of the SMA wire driving device.

Abstract: An SMA wire driving device, a closed-loop control method thereof and an electronic device are provided, which relates to the technical field of actuators. The SMA wire driving device includes a stationary part, a movable part being movable relative to the stationary part, and an SMA wire configured to drive the movable part to move relative to the stationary part, where a sampling resistor is connected in series with the SMA wire. By the SMA wire driving device, a displacement of the movable part relative to the stationary part can be detected by acquiring a voltage of the sampling resistor connected in series with the SMA wire. Based on the SMA wire driving device, a closed-loop control method is further provided, which has a small computation amount, so that the SMA wire can be rapidly controlled, improving driving effect of the SMA wire driving device.

Abstract: A lens module and an electronic device are provided. The lens module includes: a bearing portion; and at least two groups of SMA actuating structures, and each group is connected to the same side portion or different side portions of the bearing portion, and includes: a driven member fixedly provided at a side portion of the bearing portion; a first contact plate, two ends of a first SMA wire are each electrically connected to the first contact plate, and a middle portion of the first SMA wire is in contact with the driven member; and a second contact plate, two ends of a second SMA wire are each electrically connected to the second contact plate, and a middle portion of the second SMA wire is in contact with the driven member; the driven member is movably mounted between angles formed by the first SMA wire and the second SMA wire being bent.

Abstract: The invention discloses an ionospheric delay correction method for LEO satellite augmented navigation systems for GNSS. According to the method, GNSS satellite navigation signals received by LEO GNSS receiver loads are used for providing ionospheric information for navigation augmentation for earth surface users. In the method, as a set of mobile navigation augmentation reference stations, LEO satellites continuously observe the global ionosphere to generate ionospheric delay correction information, and the ionospheric delay correction information is sent to the earth surface users to obtain augmented navigation performance.

Abstract: The invention discloses an ionospheric delay correction method for LEO satellite augmented navigation systems for GNSS. According to the method, GNSS satellite navigation signals received by LEO GNSS receiver loads are used for providing ionospheric information for navigation augmentation for earth surface users. In the method, as a set of mobile navigation augmentation reference stations, LEO satellites continuously observe the global ionosphere to generate ionospheric delay correction information, and the ionospheric delay correction information is sent to the earth surface users to obtain augmented navigation performance.