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In this paper the logical structure of contactless telemechanical system for distributed objects is discussed. A simple method of variable system structure for transmitting and receiving telemechanical information is adopted. The idea is that the information oc-curred in every controlled point (station) and the information of some of those objects,which frequently change their states, are transmitted continually and cyclically, while for other objects their information is transmitted only after any change in...

In this paper the logical structure of contactless telemechanical system for distributed objects is discussed. A simple method of variable system structure for transmitting and receiving telemechanical information is adopted. The idea is that the information oc-curred in every controlled point (station) and the information of some of those objects,which frequently change their states, are transmitted continually and cyclically, while for other objects their information is transmitted only after any change in their states. Thus,the speed of operation will be increased, and also the error probability of system syn-chronization will be decreased. For the realization of the variable logical system struc-ture, several blocks are used repetitively. For example, two commutators and one sim-ple logical unit are used to construct a simple automatic sequential encoder, and at the same time, the two commutators are used also to operate as a matrix commutator for receiving telesignalling information etc. Therefore the system is comparatively simplified and attains a higher degree of "minimization".

本文研究了无触点集中-分散目标远动系统的逻辑结构.文中提出了采用简单的系统变结构来发送和接收信息的逻辑结构方式.对被控制点及一部分比较重要或变化比较频繁的被控制目标的信息,保留了循环传送,而对大部分变化比较慢的被控制目标则采用目标有变化时才传送信号的方式,这样就提高了系统的平均动作速度,同时也减小系统的失步概率.文中采用环节的复合利用及简化的逻辑单元线路来实现这种系统的逻辑结构.例如用两个分配器和一个简单的逻辑单元“和”线路组成了很简化的选点自动程序编码器,同时这两个分配器又复合利用兼组成目标信号接收矩阵式分配器等,因而可以使得这种系统同时又具有较高的极简化度.

Extending the logical capabilities of the analogue computer and increasing the accuracy and speed of solving problems on the analogue computer result in its improved performance and thus may widen its field of application. Building the "Tsinghua 556" is an effort in the above-mentioned directions. This paper gives an account of certain result of this work.

扩大电子模拟计算机的逻辑职能,提高其运算精度和速度,从而,进一步改善其性能,进一步扩大其用途,这是当前研制电子模拟计算机的重要课题。清华556型自动搜索式非线性电子模拟计算机的研制,正是力图解决上述问题的初步尝试。本文介绍研制 中在这方面工作的初步成果。

In this paper three problems in the nonlinear automatic control systems are analyzed. In the first problem, the monofrequency forced oscillation in the symmetrical non-linear systems is investigated. By using a nomograph (fig. 2) the amplitude A_B and thefrequency Ω_B. of the forced oscillation at the end of the nonlinear element can be easilyobtained. A stability criterion of the forced oscillation based on the logarithmic charac-teristics is also given. In the second problem, we discuss the effects (error,...

In this paper three problems in the nonlinear automatic control systems are analyzed. In the first problem, the monofrequency forced oscillation in the symmetrical non-linear systems is investigated. By using a nomograph (fig. 2) the amplitude A_B and thefrequency Ω_B. of the forced oscillation at the end of the nonlinear element can be easilyobtained. A stability criterion of the forced oscillation based on the logarithmic charac-teristics is also given. In the second problem, we discuss the effects (error, stability, etc.) of the sinusoidalsignal on the slow changing signal in the symmetrical nonlinear control systems. In the third problem, the amplitude B and the frequency Ω_B of the forced oscillationfor smoothing the nonlinear characteristics of the nonlinear element are determined inorder to obtain a system with good dynamic characteristics.

本文讨论了下列三个问题的对数分析方法: 在第一个问题中,讨论了非线性自动控制系统单频强迫振荡的对数分析方法,给出了一个可以简化求解强迫振荡参数A_B 和φ的算图(图2)以及一个分析单频强迫振荡稳定性的对数稳定判据。在第二个问题中,讨论了如何确定正弦信号对缓变信号在对称非线性系统中通行时所带来的影响,其中包括误差、稳定性等问题。在第三个问题中,讨论了如何确定强迫振荡的振幅B和频率Ω_B以及辗平非线性元件的非线性特性,从而提高系统的动态性能。

 
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