【摘要】：為了提高協(xié)調(diào)系統(tǒng)運(yùn)行的穩(wěn)定性及控制效果,針對(duì)車流隨機(jī)特性,采用理論分析和仿真計(jì)算相結(jié)合的方式,探討車流速度波動(dòng)和車流到達(dá)率波動(dòng)2個(gè)因素對(duì)協(xié)調(diào)系統(tǒng)控制效果的影響機(jī)理。理論分析中,將變動(dòng)的車流速度轉(zhuǎn)化為區(qū)間數(shù)形式,根據(jù)單向協(xié)調(diào)相位差求取公式,得到理想相位差的變動(dòng)區(qū)間;根據(jù)相位清空可靠度計(jì)算公式,得到車流到達(dá)率波動(dòng)與最佳周期、協(xié)調(diào)相位綠燈時(shí)間、車均延誤時(shí)間、最大排隊(duì)長(zhǎng)度等的解析關(guān)系,并進(jìn)一步借助雙向協(xié)調(diào)系統(tǒng)中求取相位差的數(shù)解法,得到關(guān)于車流到達(dá)率波動(dòng)方差的相位綠時(shí)差。仿真分析中,利用MATLAB與VISSIM搭建仿真平臺(tái),選取2個(gè)幾何線形規(guī)則的信號(hào)交叉口,制定模擬協(xié)調(diào)控制方案,選取僅改變車流速度、僅改變車流到達(dá)率、同時(shí)改變車流速度和到達(dá)率這3種情況進(jìn)行仿真,以車均停車時(shí)間、平均排隊(duì)長(zhǎng)度、車均停車次數(shù)、車均延誤時(shí)間為指標(biāo),評(píng)價(jià)其對(duì)協(xié)調(diào)系統(tǒng)控制效果的影響。研究結(jié)果表明:車流速度波動(dòng)方差、車流到達(dá)率波動(dòng)方差與控制效果均呈正相關(guān)關(guān)系,車流速度波動(dòng)的影響大于車流到達(dá)率波動(dòng)的影響,兩者同時(shí)波動(dòng)時(shí)不是簡(jiǎn)單的疊加關(guān)系,而是相互抵消影響,其控制效果介于2種情況之間;僅車流到達(dá)率波動(dòng)的情況下,協(xié)調(diào)相位雙側(cè)車流到達(dá)率波動(dòng)時(shí),控制效果優(yōu)于單側(cè)車流到達(dá)率波動(dòng);車流處于自由流與擁擠流之間切換狀態(tài)時(shí),控制效果優(yōu)于擁擠流狀態(tài),劣于自由流狀態(tài)。
[Abstract]:In order to improve the stability and control effect of the coordinated system, according to the random characteristics of the vehicle flow, the combination of theoretical analysis and simulation calculation is adopted. The influence mechanism of two factors on the control effect of the coordinated system is discussed, that is, the fluctuation of the vehicle flow velocity and the fluctuation of the arrival rate of the vehicle flow. In theoretical analysis, the variable velocity of vehicle flow is transformed into the form of interval number, the formula is obtained according to the phase difference of unidirectional coordination, the variable interval of ideal phase difference is obtained, and the formula of reliability of phase emptying is calculated. The analytical relationships between the fluctuation of the arrival rate and the optimal period, the coordinated phase green time, the average delay time, the maximum queue length, etc., are obtained, and the numerical solution of the phase difference in the bidirectional coordination system is obtained. The phase green time difference about the variance of arrival rate fluctuation is obtained. In the simulation analysis, MATLAB and VISSIM are used to build the simulation platform, two signal intersections with geometric linear rules are selected, and the simulation coordinated control scheme is formulated, and only the speed of the vehicle flow and the arrival rate of the traffic flow are changed. At the same time, the vehicle flow speed and arrival rate are changed to simulate. The average stop time, the average queue length, the average stop times and the average delay time of the vehicle are taken as the indexes to evaluate its influence on the control effect of the coordination system. The results show that the variance of vehicle flow velocity fluctuation, the variance of vehicle flow arrival rate fluctuation and the control effect are all positive correlation, and the influence of vehicle flow velocity fluctuation is greater than that of vehicle flow arrival rate fluctuation, and it is not a simple superposition relation when they fluctuate at the same time. The control effect is between the two conditions, and the control effect is better than that of the one-sided vehicle flow when the arrival rate fluctuation of the two sides of the vehicle flow is coordinated with the fluctuation of the arrival rate of the two sides of the vehicle flow only in the case of the fluctuation of the arrival rate of the vehicle flow. When the traffic flow is in the state of switching between the free flow and the crowded flow, the control effect is better than that of the crowded flow and is inferior to the free flow.
【作者單位】： 長(zhǎng)安大學(xué)公路學(xué)院;江西農(nóng)業(yè)大學(xué)園林與藝術(shù)學(xué)院;鹽城工學(xué)院土木工程學(xué)院;江蘇建筑職業(yè)技術(shù)學(xué)院建筑工程管理學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51408049) 徐州市社會(huì)科學(xué)研究項(xiàng)目(17XSS-049)
【分類號(hào)】：U491.54
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本文編號(hào)：2162708