Fine positioning method of submerged gate underwater driving device

According to the fine positioning method of the submerged gate underwater driving device, a submerged gate comprises a movable gate flap and a flow gate, and the positioning method comprises the following steps that S1, the radius of a cylinder body of the underwater driving device is estimated according to the width B, the height H and the borne water pressure of an overflowing hole opening of the flow gate; according to the radius of the cylinder body, determining the minimum safety distance r that the underwater driving device does not collide with the runner gate and the movable gate flap in the operation process; s2, determining the maximum force arm value Lmax for driving the movable valve clack to move according to the minimum safe distance r value; s3, determining a pulling and pushing force ratio coefficient zeta of the underwater driving device; s4, positioning and determining a rotating hinge point of the underwater driving device; s5, determining the working stroke of the underwater driving device