Flow-based scats control scheme running cycle automatic diagnosis method and system

Abstract

The invention discloses a method for automatically diagnosing the operation cycle of a SCATS control scheme based on flow. The method comprises the following steps: 1) obtaining effective historical multi-day SCATS traffic parameters and control scheme data of an intersection, dividing the traffic parameters and the control scheme data according to a certain time interval, and obtaining all historical flow and maximum and minimum control scheme cycle data in the time interval; 2) judging whether the operation cycle of a historical control scheme of the intersection is self-adaptive or not; 3)for intersections with self-adaptive cycles, calculating a mapping function of the flow and the cycle, finding out flow specific flow quantile values and mapping the flow specific flow quantile values to a maximum cycle and a minimum cycle respectively, and constructing a class activation function for mapping fluctuating flow to the cycle; and 4) for intersections with cycles incapable of being self-adapted, giving a judgment result of cycle abnormal locking; and for intersections with self-adaptive cycles, calculating the current time flow to obtain a cycle theoretical value, and diagnosingthe rationality of the actual cycle according to the theoretical value. The invention also includes a system for carrying out the method.

Description

technical field [0001] The invention relates to a diagnosis method and system of a Sydney self-adaptive traffic control system SCATS control scheme. Background technique [0002] The transportation system is an important infrastructure that guarantees human production, life and economic development. With the development of the times and the advancement of science and technology, the contradiction between supply and demand of transportation is becoming more and more serious. As a new type of traffic control service system, Intelligent Transport System (ITS) provides a new way to solve urban traffic problems. The intelligent traffic signal control system is one of the most basic components of the intelligent traffic system, and there are many kinds of relatively complete traffic signal control systems. The Sydney Coordinated Adaptive Traffic System (SCATS), developed by the Roads and Traffic Authority (RTA) of New South Wales, Australia, is one of the more advanced urban traf...

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