Computers are classified according to the form of data processing and can be divided into: 1. Digital computers. A typical digital electronic computer consists of a central processing unit, a computer storage system and a computer input and output system; 2. Analog computers, which use a A computer that uses continuously changing analog quantities as the object of operation; 3. A hybrid computer is a computer that combines analog and digital computers.
#The operating environment of this article: Windows 7 system, Dell G3 computer.
There are many ways to classify computers. According to the form of data processed, they can be divided into digital machines, analog machines and hybrid machines.
Digital computer
Digital electronic computer, referred to as digital computer. The information transmitted, stored and calculated inside is all numbers expressed in the form of electromagnetic signals. A typical digital electronic computer consists of a central processing unit, a computer storage system, and a computer input/output system.
The internal processing of digital electronic computers is an electrical signal called a symbol signal or a digital signal. Its main feature is "discrete", and there cannot be a third symbol between two adjacent symbols. Due to this difference in signal processing, its composition and performance are superior to analog electronic computers.
Simulator
An analog computer is a computer that uses a continuously changing analog quantity as the object of operation based on the principle of similarity. Analog computers use electronic circuits as their basic computing components. It consists of computing components, control components, question setting boards, input and output devices, etc. The concept of simulation is included in the solution using the principle of similarity, so it is called an analog computer. It is based on parallel computing and has fast calculation speed. It appropriately combines arithmetic units with fixed functions, so the program is relatively simple, but the flexibility of problem-solving is relatively poor.
Hybrid machine
Hybrid computer is a computer system that combines analog computers and digital computers for system simulation. Hybrid computers emerged in the 1970s. At that time, digital computers operated serially, with limited operating speed but high precision; analog computers operated in parallel, with high operating speed but low precision. Combining the two can complement each other's strengths, so hybrid computers are mainly suitable for simulations of complex systems that strictly require real-time performance. For example, in missile system simulation, the continuously changing attitude dynamics model is implemented by an analog computer, while navigation and orbit calculations are implemented by a digital computer.
Features:
The connection system is sometimes combined with an analog computer and is called a hybrid analog computer. In addition to the computing components of a general analog computer, it also adds logic components (such as AND gates) , OR gate, NOT gate, flip-flop, register, counter), as well as high-speed digital-to-analog converter and high-speed analog-to-digital converter, etc. Their outputs and inputs are connected to an additional digital programming board. With the continuous development of electronic technology, hybrid computers are mainly used in real-time complex large systems such as aerospace and missile systems.
Hybrid computers have the characteristics of both digital computers and analog computers: fast computing speed, high calculation accuracy, strong logic and storage capabilities, large storage capacity and strong simulation capabilities.
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