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Research on dynamic stabilityrotational speed range of rolling projectiles with different characteristics

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Journal of Beijing Institute of Technology 2014年第3期23卷 285-291页

作者：王亚飞于剑桥苏晓龙王林林 Key Laboratory of Dynamics and Control of Flight Vehicle Ministry of EducationSchool of Aerospace EngineeringBeijing Institute of Technology

Traditional dynamic stability analyses of the rolling projectiles are mainly based on solving the systems＇ transfer functions or angular motion＇ s homogeneous equations to obtain their charac- teristic roots. The solving processes of these methods are complex and lacking further analysis of the results. To solve this problem, routh stability criterion is introduced to determine the stability of rolling missiles based on the transfer function model, and an important advantage of this method is that it is unnecessary to solve the system＇ s characteristic equation. Rotational speed ranges satisfy- ing the dynamic stability of rolling projectiles with four different characteristics are acquired, and the correctness of analysis results is verified by computing the system＇ s root locus. The analysis results show that the relation between stability and rotational speed for static stable missiles is opposite to that for spin-stabilized projectiles, and the relative size of gyroscopic effect and Magnus effect has an extremely important influence on the trend of the stability of the system with increasing rotational speed.

关键词： rolling projectiles dynamic stability rotational speed boundary routh criterion

A robust test of uncertain linear systems

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控制理论与应用（英文版） 2009年第3期7卷 277-280页

作者： Yogesh V. HOTE D. Roy CHOUDHURY J. R. P. GUPTA Department of Instrumentation and Control Engineering Delhi University Department of Computer Engineering I. P. University

In this paper, it is shown that for low-order uncertain systems, there is no need to calculate all the minimum and maximum values of the coefficients for a perturbed system which is expressed in terms of polynomials and hence no need to formulate and test all the four Kharitonov＇s polynomials. Furthermore, for higher-order systems such as n ≥ 5, the usual four Kharitonov＇s polynomials need not be tested initially for sufficient condition of perturbed systems; rather, the necessary condition can be checked before going for sufficient condition. In order to show the effectiveness of the proposed method, numerical examples are shown and computational efficiency is highlighted.

关键词： Kharitonov's theorem Robust stability routh criterion

The Stability Analysis of Multimedia Playout Synchronization Using Buffer Level Control

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The Journal of China Universities of Posts and Telecommunications 2004年第3期11卷 84-86页

作者： CHENBin ZHUXiang-Hua BeijingUniversityofPostsandTelecommunications Beijing100876P.RChina

From the viewpoint of Cybernetics, multimedia playout synchronization system is a closed loop control system. The paper analyses the stability of a typical buffer-oriented playout synchronization model~ [1] with routh criterion. The sufficient and necessary condition of system stability is obtained. The restriction relationship between two important system parameters: synchronization adaptation phase L and smoothing factor а is also given.

关键词： multimedia synchronization stability routh criterion

Controller Reconfiguration Design Based on Stability Analysis

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Controller Reconfiguration Design Based on Stability Analysi...