Hybrid computer is a computer system that combines analog computer with digital computer and applies it to system simulation. It is mainly suitable for the simulation of some complex systems with strict real-time requirements. For example, in missile system simulation, the continuously changing attitude dynamic model is realized by analog computer, while navigation and orbit calculation are realized by digital computer.
混合计算机是把模拟计算机与数字计算机联合在一起应用于系统仿真的计算机系统。混合计算机出现于 20 世纪 70 年代。那时，数字计算机是串行操作的，运算速度受到限制，但运算精度很高；而模拟计算机是并行操作的，运算速度很高，但精度较低。把两者结合起来可以互相取长补短，因此混合计算机主要适用于一些严格要求实时性的复杂系统的仿真。例如在导弹系统仿真中，连续变化的姿态动力学模型由模拟计算机来实现，而导航和轨道计算则由数字计算机来实现。
Hybrid computer is a computer system that combines analog computer with digital computer and applies it to system simulation. Hybrid computers appeared in the 1970s. At that time, the digital computer was serial operation, the operation speed was limited, but the calculation accuracy was high; while the analog computer was parallel operation, the operation speed was very high, but the accuracy was low. Therefore, the hybrid computer is mainly suitable for the simulation of some complex systems with strict real-time requirements. For example, in missile system simulation, the continuously changing attitude dynamic model is realized by analog computer, while navigation and orbit calculation are realized by digital computer.
混合计算机 【hybrid computer】可以进行数字信息和模拟物理量处理的计算机系统。混合计算机通过数模转换器和模数转换器将数字计算机和模拟计算机连接在一起。
Hybrid computer is a computer system that can process digital information and analog physical quantities. The hybrid computer connects the digital computer and the analog computer through a / D converter and a / D converter.
Connecting system is sometimes combined with analog computer, which is called hybrid analog computer. It has not only the operation components of general analog computer, but also logic components (such as and gate, or gate, not gate, trigger, register, counter), high-speed digital to analog converter and high-speed analog-to-digital converter. Their outputs and inputs are connected to an additional digital layout board. With the continuous development of electronic technology, hybrid computers are mainly used in aerospace, missile systems and other real-time complex systems.
Hybrid computer has the characteristics of both digital computer and analog computer: fast operation speed, high calculation accuracy, strong logic and storage capacity, large storage capacity and strong simulation ability.
When operating on a hybrid computer, the analog variables from the analog computer are converted into digital variables through an analog-to-digital converter and transmitted to the digital computer. At the same time, the digital variables from the digital computer are converted into analog signals through a digital to analog converter and transmitted to the analog computer. In addition to the conversion and transmission of computational variables, there are also the transmission of logic signals and control signals. The synchronization of digital and analog operations on a computer. The digital computer exchanges information with the analog computer and corrects the data once every frame operation is completed. In the time interval (frame) between the two information exchanges, the calculation results of the previous frame of the two computers are used as the initial value for operation. This interval is called frame synchronization time. For the design of hybrid program, users are required to consider the allocation of models on different computers, the choice of frame synchronization time and the understanding of the hardware characteristics of the connecting system.
The modern hybrid computer has developed into a hybrid multiprocessor system with the ability to automatically arrange simulation programs. It consists of a supercomputer, one or two peripheral array processors, and several analog processors with automatic programming capabilities. Among all kinds of processors, a hybrid intelligent interface is used to complete the conversion and transmission of data and control signals. This system has strong real-time simulation ability, but it is expensive.