Fault Risk Assessment of Underwater Vehicle Steering System Based on Virtual Prototyping and Monte Carlo Simulation

Abstract

Assessing the risks of steering system faults in underwater vehicles is a human-machine-environment (HME) systematic safety field that studies faults in the steering system itself, the driver's human reliability (HR) and various environmental conditions. This paper proposed a fault risk assessment method for an underwater vehicle steering system based on virtual prototyping and Monte Carlo simulation. A virtual steering system prototype was established and validated to rectify a lack of historic fault data. Fault injection and simulation were conducted to acquire fault simulation data. A Monte Carlo simulation was adopted that integrated randomness due to the human operator and environment.Randomness and uncertainty of the human, machine and environment were integrated in the method to obtain a probabilistic risk indicator. To verify the proposed method, a case of stuck rudder fault (SRF) risk assessment was studied. This method may provide a novel solution for fault risk assessment of a vehicle or other general HME system.

Distribution Characteristics and Control Factors of Hydrogen Sulfide in Xishan Coal Mine of Southern Margin of Junggar Basin in China

“…The environment of deep confined water in this regional is closed well. In the reductive environment, under the effect of sulfate reducing bacteria and thermodynamic factors, H 2 S is likely to come into being if it experiences the effect of Bacterial Sulfate Reduction (BSR) or Thermochemical Sulfate Reduction (TSR) (Smith and Philips 1990, Manzano et al 1997, Mingju et al 2012, Machel 2001, Cross et al 2004, He et al 2016, Gao et al 2017, Li et al 2018, Estrada et al 2018, Ahamed et al 2017, Poppenga and Worstell 2016. Its possible reaction formula is shown in formula (1) to formula (4).…”