Ascending elevator accidents: give the miner a brake

Barkand, T.D.

doi:10.1109/28.137463

Cited by 8 publications

(2 citation statements)

References 1 publication

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“…In all the accidents, those resulted in serious injuries or fatalities get special attention. These accidents occurred on elevators as a result of electrical, mechanical, and structural failures [1].…”

Section: Introductionmentioning

confidence: 99%

Study on automatic diagnostic of elevator brake coil wearing

Guo

Fan

2014

The 26th Chinese Control and Decision Conference (2014 CCDC)

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The wearing state of the elevator brake coil influences the normal work of the elevator, thus is vital for the safety maintenance of the elevator. This paper introduced an automatic diagnostic method of the coil wearing state through measuring the acceleration curve of the running coil. By applying the algorithm in the real-time inspecting system, the hidden danger of the brake system can be discovered in time and thus avoid the according accidents.

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Section: Introductionmentioning

confidence: 99%

Study on automatic diagnostic of elevator brake coil wearing

Guo

Fan

2014

The 26th Chinese Control and Decision Conference (2014 CCDC)

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“…The ultimate objective of protecting occupants from surviving the casualties and severe injuries during ultra-high speed vertical crashes is essential in elevator emergency events. Shock absorbers (SAs) as the last stage of elevator safety device for life salvation are usually installed in the shaft pit and act as a buffer to avoid rigid impact when the elevator car surpasses the terminal landing due to wire rope breakage, insufficient brake force, and control system failure, etc (Barkand, 1992; Kwon et al, 2019). Currently, the oleo-pneumatic shock absorbers (OPSAs) are widely used to generate hydraulic resistance by squeezing fluid flow through the restricted orifice gap (Lee and Kim, 2010).…”

Section: Introductionmentioning

confidence: 99%

Optimal control for soft-landing in elevator emergency crash using multiple magnetorheological shock absorbers

Zheng

Zhao

Wang

et al. 2022

Journal of Intelligent Material Systems and Structures

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Protecting the occupants from surviving the casualties and severe injuries in elevator emergency crashes is always essential. This paper aims to explore the feasibility of using multiple magnetorheological shock absorbers (M-MRSAs) to attain the soft landing of a full-load elevator under impact velocities ranging up to 32 m/s. The resistance forces of MRSA with a bi-fold structure are predicted by evaluating the pressure drops using a nonlinear Bingham-plastic model considering the effects of minor loss. The optimal control for an M-MRSAs system achieving robustness concerning different mass loadings and impact velocities is investigated by formulating a multi-objective problem to minimize the induced peak acceleration with constrained time duration. The results demonstrate that the self-adapting MR yield force provides a smooth operation by minimizing the cycles of re-crash and rebound without incurring an end-stop impact. Furthermore, a plateau behavior of acceleration-displacement profiles is realized to effectively reduce the load transmission from overshoot accelerating force to the protected occupants and eliminate the injury risk.

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Mining Equipment Safety

2010

Springer Series in Reliability Engineering

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Ascending elevator accidents: give the miner a brake

Cited by 8 publications

References 1 publication

Study on automatic diagnostic of elevator brake coil wearing

Study on automatic diagnostic of elevator brake coil wearing

Optimal control for soft-landing in elevator emergency crash using multiple magnetorheological shock absorbers

Mining Equipment Safety

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