Chapter 919: Inertial Navigation Technology

Of course, this construction was also won.
In January 1960, the First Machinery Department held a meeting on the "031" boat. The originally planned shipyard has not yet formed a production capacity and does not have the conditions to start construction in the short term. The meeting suggested that Huating Jiangnan Shipyard should undertake the construction. However, the shipyard was unable to undertake the construction of the "033" boat.
Under this circumstance, the leaders of the Bincheng Shipyard who participated in the meeting took the initiative to invite Ying and offered to undertake the construction task of the "031" boat. After repeated investigations, it was found that there was no problem, and the task was assigned to the Bincheng Shipyard.
On March 3, 1960, the "031\" boat began to stake out drawings; on April 1, 1960, the construction start order for the construction of the "031" submarine was officially issued, and the fortification number in the factory was "C-601\".
In May, in order to improve the professional technical level of construction personnel, the shipyard held professional training courses on machining, welding, heat treatment, installation, commissioning, and testing of special instruments and equipment, focusing on the AK-ships shipped from Xiongguo. 25, AK-27 steel plate processing, welding and the use of stainless steel welding wire, etc. organize workers to conduct practical technical training, and invite Xiong Guo experts to give lectures and transfer experience according to work types and majors.
Originally, there was a lot of fanfare and preparations for a big fight. As a result, the two countries feuded, Xiong State withdrew the experts, and the follow-up materials were not transported.
Under these circumstances, the Bincheng Shipyard carried forward the spirit of fighting, and after exploration, finally completed the trial production of the first submarine. Originally, it was originally planned to build 2 ships in the first batch of imitations, and then arranged to build 4 ships during the "2nd Five-Year Plan" period and 36 ships during the "Three Five-Year Plan" period. However, due to technical limitations and the fact that the supporting submarine-launched ballistic missiles had not yet been developed at that time, no subsequent boats were built and only one was built.
This submarine, with a displacement of more than 3,000 tons, belongs to the category of large submarines. The 033 at the same time has a displacement of less than 2,000 tons.
At the same time, its advanced point is that it is a ballistic missile submarine. The submarine designed by Xiong Guo is equipped with three SS-N-4 submarine-launched ballistic missile launchers. The missile is 9.5 meters long, has a projectile diameter of 880 mm, and a range of 350 kilometers. Although the performance is not good, it is after all A submarine capable of launching ballistic missiles.
Although after service, the submarine can only be used for training for a long time because there is no matching missile.
At the same time, as Han State is preparing to start developing the first generation of submarine-launched ballistic missiles, a large number of joint training and launch tests of underwater missile systems are required, and the boat itself has the ability to launch ballistic missiles, so it decided to use the 031 boat as the test. It is used to cooperate with the various preliminary launch tests of the Han's first domestically produced submarine ballistic missile that is planned to be developed.
In this case, the 031 submarine began to modify.
In the first step, the three Soviet-made CM-60 water missile launchers on the boat were replaced by two domestically designed "Julang-1" missile underwater launchers.
The core of the new launching device is the missile ejection device that pushes the missile out of the tube and shoots out of the water. It surpasses the technical level of the first-generation compressed air ejection device and gas ejection device of the submarine-to-surface missile. The gas-steam ejection device has a simple system structure, small missile launch overload, and large ejection thrust, which has the world's first-class technical level.
Later, in order to improve the missile launch capability under high sea conditions, the boat was subsequently modified for a second time. After this modification, the ship number was changed to the expedition 200 submarine.
However, the test firing of missiles is a very complicated process. Every time you come back, you have to make improvements. This time, when you return to the shipyard, there may be some items that need to be improved.
Ordinarily, this is the top secret in the country, but Qin Guan's level has been reached, and with Qin Guan's participation, maybe it can solve these problems?
"Mr Qin, we still have a long way to go before we can complete the experiment. Now, we have conducted enough experiments on underwater launches, and we have accumulated a lot of experience. There is no problem with making the missiles out of the water successfully. However, the positioning of the submarine is still a big problem."
If you want the missile to hit the target accurately, you must have an advanced positioning system.
The launch of ballistic missiles is a complicated process. Factors such as the location of the missile when it is launched, the location of the target, and the rotation of the earth are all taken into account. Then the computer calculates the trajectory, when the engine shuts down, and when it reenters the atmosphere.
If this is not accurate enough, the missile will pass and the error may be several kilometers.
On land, the location of the launch site is determined. Even if it is a mobile launch, a certain launch site is found in advance, and the coordinates are known.
But the sea is different.
The submarine is sailing in the sea and launches missiles as needed at any time. If you can't know your position accurately, the aim of shooting the missile is not high enough.
Qin Guan also frowned: "Yes, let us solve this problem. We use our own methods to obtain some advanced technologies from the world, and then hand them to our technical experts, hoping to develop lasers as soon as possible. Here comes the top."
The development of high technology is not easy. Up to now, some technologies in Han have not caught up. Inertial guidance system is one aspect.
In addition to submarines, fighters and missiles all require this advanced technology.
Inertial navigation system, a navigation parameter calculation system using gyroscope and accelerometer as sensitive devices. The system establishes a navigation coordinate system according to the output of the gyroscope, and calculates the speed and position of the carrier in the navigation coordinate system according to the output of the accelerometer.
Among them, the top is of great importance, and the smaller the resistance the top receives, the better.
The original ball-bearing gyroscope has a drift rate of (l-2)°/h. This accuracy is very poor. The original V-2 rocket is this kind of guidance system, with a range of only a few hundred kilometers, and the error may be There are more than ten kilometers.
After that, the air-floating, liquid-floating and maglev gyroscopes developed by overcoming the inertial instrument support technology can achieve an accuracy of 0.001°/h.
At the current level of Han, the liquid-floating gyro and the Long March series of rockets are used. This product is used. Although the accuracy is not low, the accumulated error is still considerable. If the submarine is patrolling underwater half Months, it will not be able to meet the needs of missile launch.
This time, they went out for half a month, and then came back to re-adjust the top, and they were also discussing a solution.
What is the way? Of course it is a laser gyroscope.
In 1960, the laser gyroscope was successfully developed for the first time. In the Western world, this type of gyroscope is widely used for inertial navigation. Western fighter aircraft, missiles, etc., all use this type of gyroscope.
However, Han has no technical reserves.
How to do? Of course I found it from the weapon material cemetery! This difficulty is not only for submarines, missiles, airplanes, etc., all have requirements. Qin Guan has made up his mind to find the information and hand it to Professor Lin, the leader of the navigation system research in Han, and then need processing equipment. Look for it yourself from the machine tool cemetery. In short, this technical problem must be solved!
"If time is too late, we can also import advanced Western laser gyroscopes through certain channels and install them on our submarines to meet our needs first." Qin Guan added.
After all, the underwater launch experiment is being intensively prepared, and you may not be able to wait for your own research. It is not difficult to import a finished product from the Western market.