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yangxiao55新蟲 (小有名氣)
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多時滯線性系統(tǒng)仿真 已有2人參與
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我最近完成一多時滯線性系統(tǒng)仿真程序: http://www.mathworks.cn/matlabce ... -time-delay-systems 程序說明: In our book [1], we some stability test theorems for linear time-delay system. To verify our stability test theorems and others' stability test algorithms [2], we provide this simulation program of time-delay systems. You can use the program, to find that the results of [2] are incorrecct. The following example is taken from the case 1 of [2], where [2] claimed to found a stable region for the time-delay system of case 1,however, the simulation shows that the the time-delay system of case 1 is unstable, dx(t)/dt=Ax(t)+B1x(t-t1)+B2x(t-t2)+B3x(t-t1)+B4x(t-t4) with delay parameters: t1=.4;t2=.5; t3=.169;t4=0.26. Thus, the main results of [2] are incorrect. [1] Yang Xiao, Yingkang Zhang, Multidimensional Signal Processing and Multidimensional Systems, Publishing House of Electronics Industry, Beijing, 2011. [2] Rifat Sipahi and Ismail Ilker Delice, Advanced Clustering With Frequency Sweeping Methodology for the Stability Analysis of Multiple Time-Delay Systems,IEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. 56, NO. 2, 2011, pp.467-472. [ Last edited by yangxiao55 on 2012-8-25 at 10:00 ] |
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新蟲 (小有名氣)

木蟲 (正式寫手)
銅蟲 (小有名氣)

新蟲 (小有名氣)
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1. 我設(shè)計的程序可以驗證文獻[2]的主要結(jié)果是錯的. 而文獻[2]發(fā)表在頂級期刊:IEEE TRANSACTIONS ON AUTOMATIC CONTROL上. [2] Rifat Sipahi and Ismail Ilker Delice, Advanced Clustering With Frequency Sweeping Methodology for the Stability Analysis of Multiple Time-Delay Systems,IEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. 56, NO. 2, 2011, pp.467-472. 文獻[2]宣稱可以給出多時滯系統(tǒng)的穩(wěn)定邊界,但是本程序發(fā)現(xiàn)在其宣稱的穩(wěn)定邊界內(nèi)的系統(tǒng)確實不穩(wěn)定的. 2. 文獻[1]中的有關(guān)穩(wěn)定性檢驗為多時滯系統(tǒng)穩(wěn)定的充分條件, 尚不能確定多時滯系統(tǒng)的穩(wěn)定邊界. 3. 多時滯系統(tǒng)的穩(wěn)定邊界的確定需要給出多時滯系統(tǒng)穩(wěn)定的充要條件,目前基于LMI的多時滯系統(tǒng)穩(wěn)定條件均無法得到多時滯系統(tǒng)的穩(wěn)定邊界. 4. 文獻[2]的問題在于其主要結(jié)果不是多時滯系統(tǒng)穩(wěn)定的充要條件, 因此才會出現(xiàn)將不穩(wěn)定的系統(tǒng)歸入穩(wěn)定集合的情況. 5. 目前, 多時滯系統(tǒng)穩(wěn)定性方面的許多發(fā)表論文, 并不進行系統(tǒng)仿真,讀者難以確定其結(jié)果在實際應(yīng)用中是否正確. |

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