The application of the dynamic positioning system, the working principle of the dynamic positioning

1. Dynamic positioning system (dynamic positioning system) is a closed-loop control system, which uses thrusters to provide environmental forces that resist wind, waves, currents and other acts on the ship, so that the ship can be kept in the required position on the sea level as much as possible, and its positioning cost will not increase with the increase of water depth, and the operation is also more convenient.

2. The dynamic positioning system is first applied in marine drilling ships, platform support ships, submersible support ships, pipeline and cable laying ships, scientific research ships, deep-sea lifesaving ships, etc., and its main principle is to use the computer to collect the environmental parameters (wind, waves, currents), and automatically calculate according to the position provided by the position reference system to control the thrust of each thruster, so that the ship can keep the heading direction and the position of the ship "not moving".

1. Dynamic positioning system (dynamic positioning system) is a closed-loop control system, which uses thrusters to provide environmental forces that resist wind, waves, currents and other acts on the ship, so that the ship can be kept in the required position on the sea level as much as possible, and its positioning cost will not increase with the increase of water depth, and the operation is also more convenient.

2. The dynamic positioning system is first applied in marine drilling ships, platform support ships, submersible support ships, pipeline and cable laying ships, scientific research ships, deep-sea lifesaving ships, etc., and its main principle is to use the calculation of the Jichang hail machine to collect the environmental parameters (wind, waves, current), according to the position provided by the position reference system, automatically calculate, control the thrust of each thruster, so that the ship can maintain the heading direction and the ship's fast round position.

Dynamic positioning system (dynamic positioning system) is a closed-loop control system, which uses a thruster to provide resistance to wind, waves, currents and other environmental forces acting on the ship, so that the ship can be kept in the required position at sea level as much as possible, and its positioning cost will not increase with the increase of water depth, and the operation is also more convenient.

Dynamic positioning is a positioning method that can automatically maintain a floating device at sea without anchoring. The use of dynamic positioning of the offshore floating device, in the offshore drilling operation does not need to anchor, which not only reduces the complex anchoring process, but also the working water depth is not limited by the length of the anchorage, and can even work at a depth greater than 1000 meters.

Dynamic positioning is a positioning method for offshore engineering ships, which first uses sonar to determine the position of the ship, and then uses the automatic control system on the ship to issue instructions to control the lateral thrusters installed in the bow and stern of the ship to fix the ship position.

The advantage of the dynamic Qingli fixed search and slow anterior method is that it is not limited by water depth and is suitable for use in deep-water areas.

When dynamic positioning, it is transmitted by computer, and it only takes a few minutes to park the ship under navigation in a predetermined position. After the system is turned on, instruments such as position sensor, heading sensor, attitude sensor, wind sensor, ocean current sensor begin to measure data in real time, and these data information are transmitted to the computer in time, and the computer then compares it with the stored predetermined berthing position data, finds out the difference, and then sends a command to each thruster, adjusts its thrust, implements the difference correction, until it reaches the predetermined position, stops. The system applies advanced technologies such as differential global positioning system, digital filtering technology, and optimal control software, so that its positioning accuracy is within a few meters, reaching the advanced level in the world today.

The system can be applied not only for docking positioning, but also for ship-to-ship distance fixing. According to experts, when the sea supply ship carries out the replenishment work during the journey, it needs to be safe and reliable to maintain the distance control, and the system makes the sea sports supply no longer become a difficult action through the automatic and precise control of the ship's thrusters. In addition, the system is also used for submarine cable laying, maintenance, rock dumping, sand mining and dredging, crane ship operations, shuttle tankers, diving, ROV, marine salvage and lifesaving, and deep-sea oil extraction and other marine operations platform positioning.

The dynamic positioning system is composed of a ship position display, an electronic computer control mechanism and a thruster. When working, the electronic computer can automatically send out a control signal at any time according to the position value measured by the ship position instrument, and change the running direction, speed or screw moment of the blade of the thruster to adjust the ship position. Some dynamic positioning systems can also send signals in advance to offset the impact of wind according to changes in wind power.