무인 경량전철 가용도 산정 및 검증에 관한 연구

A Study on the Estimation and Verification of the Availability of the Unmanned Light Railway

Abstract

Unattended Train operation(UTO) requires higher safety target than other systems, since all train operations are automatic. The system provider to deliver without accident or failure, and the operator to transport passengers without accident by putting all trains supplied, including them, into service. Safety rates without such failures can be represented as indicators of RAMS, among which availability is continuously controllable to achieve the target, with a clear target. Availability is often required by the licensee from the initial stage of the project to demonstrate that the request for proposal (RFP) is usually specified and to maintain separate availability targets at the operational stage. In particular, unlike unmanned operation light rail in complex systems, simple formulas are often presented to facilitate verification at each stage. This paper presents this method of usability calculation in an integrated manner at all levels and analyzes the existing usability values to ensure reliability of the availability formula for integrated use in unmanned light rail systems.

Fig. 1. General availability calculation.

Fig. 2. Suggestions for system availability calculations.

Fig. 3. Overview of shuttle tain routes.

Fig. 4. Normal operation mode of shuttle train.

Fig. 5. Proposal of MTBF and availability by 3rd shuttle train.

Fig. 6. 120-Days cumulative availability on operational routes.

Table 1. Application examples of availability by route

Table 2. Application examples of availability by route

Table 3. Quantitative availability requirements

Table 4. Availability target value (construction company)

Table 5. Comparison of availability against train failures(1)

Table 6. Comparison of availability against train failures(2)