Calculating the Brake-Application Time of AEB System by Considering Maximum Deceleration Rate during a Primary Accident in Penang's Urban Road

Authors

  • M.F.H. Rani
  • S. Abu Bakar Motorsports Technology Research Unit (MoTECH), Universiti Malaysia Perlis, Pauh Putra Campus, 02600 Arau, Perlis, Malaysia
  • M.S.M. Hashim
  • A. Harun
  • Z.M. Razlan
  • W.K. Wan
  • I. Zunaidi
  • I. Ibrahim
  • M. Afendi
  • N.E. Efi
  • M. Dalib
  • S.S. Mat Rudin

DOI:

https://doi.org/10.56381/jsaem.v3i3.130

Keywords:

Autonomous Emergency Braking (AEB), Time-to-Collision (TTC), brake-application time, road accident, deceleration rate

Abstract

An experimental study of the brake-application time of Autonomous Emergency Braking (AEB) system considering the primary accident in an urban area was proposed. Since the functionality of the brake-application time is varied between manufacturers and models, the brake-application time of AEB system must be verified based on driving behaviour in Malaysia. A primary accident was simulated to acquire vehicle deceleration rate in real condition by driving an ego vehicle at a different set of vehicle speeds. The study is focussed on the urban roads in the north region of West Malaysia, i.e. Penang. As a benchmark in this study, the brake-application time (2.6 s) introduced by Mercedes-Benz in the PRE-SAFE® Brakes technology was referred. A new braking permission time was proposed by calculating a minimum deceleration distance and Time-to-Collison (TTC) confirmation time required to brake based on maximum deceleration when a primary accident was simulated. It was found that the brake-application time recommended for the AEB system, specifically AEB City conveys the real driving condition of Penang when a primary accident happens in the urban area. To have a smooth braking and an optimum braking performance during a primary accident, the Forward Collision Warning (FCW) should be activated at TTC ≤ 4.6 s. The partial braking (PB) should be activated automatically when the TTC is approximately 2.9 s. While the automated full braking (FB) phase should begin when the TTC reaches 1.1 s.

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Published

04/29/2021

How to Cite

[1]
M. Rani, “Calculating the Brake-Application Time of AEB System by Considering Maximum Deceleration Rate during a Primary Accident in Penang’s Urban Road”, JSAEM, vol. 3, no. 3, pp. 320–332, Apr. 2021.

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Section

Original Articles