Abstract: A non-sensor type closed-loop stabilization control algorithm comprises the following steps: 1, reading all voltages Vk?1 and currents Ik?1 for driving a multi-axis stabilization motor; 2, calculating and outputting all coil resistances Rk?1 in the multi-axis stabilization motor; 3, reading all the coil resistances, voltages and currents in the steps 1 and 2, and calculating and outputting counter electromotive force Ek?1 of all the coils in the multi-axis stabilization motor; 4, reading an stabilization compensation angle ?k, each coil resistance and the counter electromotive force, and calculating and outputting a closed-loop stabilization control Fk; and 5, then waiting for a time step k=k+1, and repeating the steps in the steps 1 to 4. It aims to add a closed-loop control element to a motor without a sensor to achieve an excellent stabilization effect and to reduce the risk of image blurring caused by resonance.

Abstract: A circuit board having multiple degrees of freedom, comprises a flat board and a conductive and flexible unit disposed on the flat board. The conductive and flexible unit comprises: an inner support plate, an outer support plate, and at least one flexible connector; a hollow portion is provided on the outer support plate; the inner support plate and the flexible connector are disposed in the hollow portion; the inner and the outer support plates are connected by the flexible connector; the flexible connector comprises an outer connecting portion, an inner connecting portion corresponding to the outer connecting portion, and an extension located between the outer connecting portion and the inner connecting portion. The circuit board has a simple and compact structure; the production efficiency is high; costs are low; a multi-axis flexible anti-shaking effect can be achieved without folding a flexible structure; the resilience performance is good.

Abstract: A spring system, comprising at least three springs. The centerlines of the at least three springs are not in the same plane, and the centerlines of the springs all pass through the same rotation center. A lens anti-shaking device using the spring system, comprising: a fixing assembly comprising a housing, a positioning base, and a magnet group, the positioning base being disposed on the housing, and the magnet group being disposed on the positioning base; and a movable assembly comprising a coil group, a lens, a lens carrier, an image sensor, and a circuit board, the lens carrier being mounted on the positioning base by means of the spring system, the lens being mounted on the lens carrier, the circuit board being mounted on the positioning base, and the image sensor being disposed on the circuit board.