The application of virtual reality in military affairs
virtual reality has long become a stage for war experience. War plans are based on virtual reality technology, through the use of simulators to train soldiers to fly aircraft or use weapons. Even ordinary people can play highly realistic business games, such as call of duty (or full spectrum warrior (indulge in their fighting dreams. In addition to high-tech war exercises, immersive virtual reality technology and computer-based simulation are used in military applications, from more realistic training methods to improving the design and efficiency of complex military systems.
the reason why the military is more and more interested in virtual reality technology can be attributed to a simple reason from an engineering point of view, that is, cost and security. The other side's design The cost of testing is lower - for example, for weapon systems and maintenance platforms, there is no need to build physical prototypes and transport them abroad to test whether they can operate well on the battlefield. When developing key equipment, feedback information can be collected at the early stage of development, which can avoid fatal design defects being found near the stage of production, so key equipment can be developed and put into use in the battlefield faster. In addition, by displaying and testing the conceptual design in the virtual environment, military engineers and government project contractors can conduct in-depth research on design problems, which is not limited by cost and time as the traditional iterative design processThe safety consideration of C6 cave of the virtual reality application center is also another motivation for the rapid application of virtual reality technology. Field training is not only costly, but also a threat to soldiers' lives and the environment. The new generation of soldiers grew up in the era of video games and Internet. Most of them trained from a comfortable digital experience, as if they were participating in actual combat training and face-to-face review
to some extent, virtual reality has been popularized in military (and commercial) because this technology can finally be realized at an acceptable cost. A few years ago, virtual reality can only be realized through complex equipment, including expensive supercomputers, wall mounted displays and advanced accessories, which means that it can only be used in research institutions, high-end military operations or enterprises with large technology budgets. However, with the wide application of these devices, meaningful virtual reality experience can now be realized through desktop PC equipped with head display, 3D glasses and some other common accessories. Its cost is reasonable, only tens of thousands of dollars, not millions of dollars
maintain 3D images of the platform. By using 3D visualization instead of physical prototype, the military has saved several years in the establishment time of maintenance warehouse
"nowadays, the cost of realizing virtual reality is very low. You don't have to spend 500000 dollars to test whether you can make a profit. If necessary, you can spend only 25000 dollars to test and view the results." Mark Bryden, an associate professor of mechanical engineering at lowa State University, said that the virtual reality application center was established at the University. The center is engaged in research related to virtual reality and visualization technology, and has signed contracts with the military and enterprises
the virtual reality application center (VRAC) has actually studied the prospects of military virtual reality systems for several years. The initial project uses visualization to reproduce the battle scene, so that commanders can directly experience the reasons for taking special decisions, and they can make more effective summary and analysis of tactical strategies. VRAC's visualization ability, virtual image technology and large model technology are also used by the military for virtual prototyping applications to speed up the design of key aircraft and other armaments
another ongoing project is to establish a virtual reality control room to realize the operation of Military Unmanned Aerial Vehicles (UAVs). According to James Oliver, Professor of Mechanical Engineering Department of Iowa State University and director of VRAC, this site is a reinforced, hexagonal virtual reality field, which is unique in that it has reached the highest resolution in the world - up to 100million pixels. VRAC has established the first C6. In 2005, VRAC was authorized by the air force to undertake the construction of a multi-mode interface, using virtual reality technology for key commands and control operations. The idea is to simulate and display the flight of unmanned aerial vehicles in the surrounding airspace and terrain, and the airspace and terrain information is obtained through instruments and cameras. The interface is more interactive and direct, allowing a single operator to control multiple unmanned aerial vehicles
the unmanned aerial vehicle displayed through C6 before the 2007 upgrade
is still continuing to study the application of virtual reality technology in battlefield command and control. In the past, commanders made strategies on the sand table, and it may take weeks to see whether the strategies are effective. The current basic command operation scheme is a large control center with multiple information displays. In addition to the obvious high-tech features, Oliver pointed out that these systems are quite confidential. "It has many information displays, but different information has different sources. The information is usually numbers, 2-D maps and (vertical and horizontal) coordinates." He said. "The main idea is to integrate all kinds of information to avoid confusion and help decision makers understand what may happen."
virtual reality technology VR helps treat soldiers' traumatic stress syndrome PTSD
when it comes to the various applications of virtual reality technology, scientists at the Institute of innovative technology at California State University have developed virtual reality based devices to help soldiers returning from the battlefield overcome post-traumatic stress syndrome
according to skip Albert Rizzo, a ICT research expert and scientist on connective tissue inflammation and one of the developers of the simulation program, the scene of the Iraqi battlefield is simulated by using the helmet mounted display connected to the desktop (), which reproduces the image, sound and even smell of the battlefield, so that soldiers can experience and face everything they have experienced in the environment monitored by doctors. "With this form of 'soft loading', they returned to the battlefield in Iraq - which is the advantage of simulation technology." Rizzo said. "In the virtual reality environment, we can bring them back to that world and reduce the burden of talk therapy."
the virtual Iraq scene puts patients in three scenarios: driving a Humvee military SUV in the desert, in a middle east city or in a small village. The patients are integrated into the environment, and the doctors use the mouse to increase the virtual experience of the comparative experiment of melamine plastic tableware jointly carried out by Zhuhai municipal consumer committee and Macao consumer committee according to the reaction of the patients. "This is not automatic and autonomous treatment, but a tool for trained doctors to improve treatment." Rizzo explained
at present, the system is used in about 20 places in the United States, and each equipment assembly costs about 8000 dollars
in the research of VRAC, Professor Bryd's team combined simulation physics and virtual reality technology to simplify the design process. In the normal development process, the design scheme is tested by analysts through simulations such as computational fluid dynamics (CFD) or finite element analysis (FEA) - this process usually takes several weeks and is not related to subsequent design changes. Through these means, we can establish physical prototypes, optimize the design according to their performance, and carry out more FEA, CFD and other analysis work. "The combination of simulation and immersive virtual reality environment greatly speeds up the design process, not to mention that it can also make non simulation experts understand the model quickly." Bryden said
Jim Oliver of the virtual reality application center
although Deere & Co. (not a military customer, they also test the research of VRAC from BIW to assembly and then to parts. CFD simulation shows that in the immersive virtual reality environment can help them design a more efficient cotton picker. This picker can pick a large number of cotton faster without increasing engine power. "Through immersive 3-D display, you can clarify problems faster and incorporate shareholders into the decision-making process," said Jerry R. Duncan, director of R & D outreach at Deere University. "They can understand the research results rather than simply being told that they should do so."The virtual reality based simulation and training system of General Dynamics enables engineers and military personnel to test the appearance, feel and function of the design before the equipment is put into production Like the military, Deere is also optimistic about the role of virtual reality technology in product design, so they have invested millions of dollars in this technology. Because there is no need to establish a physical prototype, enterprises can evaluate the prototype by using virtual reality technology, so as to study various design schemes, Duncan said. Deere recently used this technology to evaluate how to change the placement of the fuel tank in a tractor. The result is that the operator only needs to click a button to analyze multiple schemes, and different shareholders can quickly reach an agreement on the next step. "In a few minutes, we can browse the performance of six or more physical prototypes." Duncan said. "Although we didn't make a decision that day, it also saved several weeks of time? It can be said that we saved hundreds of thousands of dollars that day."
in addition to being able to play a role in the preliminary design, virtual reality technology can also be used as a better training method for complex systems, such as general dynamics C4 systems, which uses virtual reality equipment to help soldiers test new equipment, such as Land Warrior systems, which brings soldiers into the battlefield network. Virtual reality technology can help soldiers conduct exercises and better prepare for physical fitness tests. Commanders can also observe soldiers' use of new equipment. "When soldiers participate in the test, they can get data from the system, such as the location of the installation problems of their hydraulic universal material testing machine and the direction of weapons - everything that happens is recorded," said Ralph Whitney, coach of training and simulation system of General Dynamics C4 systems. General Dynamics C4 systems has developed a series of communication application systems for military virtual reality technology
instant feedback is more critical for military applications. In Research Development Engineering Command (rdecom), the application of virtual reality is only a part of Six Sigma inspection. This system mainly provides soldiers on the battlefield with a faster maintenance platform. Traditionally, rdecom takes nearly six years to get a satisfactory battlefield maintenance platform. Now, with the help of simple product development process, virtual prototyping and new rapid user requirements collection method, the team can reduce the cycle to two years
"in military applications, time is everything. The enemy is shooting at you, so you must solve the problem immediately, not six months later." Joe kleiss, head of Marine Corps' special project team at rdecom, said
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