Comparison of braking performance between mechanical and dynamic braking for Electric Powered Wheelchair

1st International Postgraduate Conference on Mechanical Engineering

工业技术（总论）;机械制造

Asyrafs, S.M.^1^2 ; Heerwan, P.M.^1^2 ; Izhar, I.M.^1^2 ; Zulhilmi, I.M.^1^2 ; Sollehudin, I.M.^1^2

Automotive Engineering Centre (AEC), Universiti Malaysia Pahang, Pekan, Pahang

26600, Malaysia^1

Faculty of Mechanical Engineering, Universiti Malaysia Pahang, Pekan, Pahang

26600, Malaysia^2

关键词: Braking system;    Braking torque;    Dynamic braking;    Electric powered wheelchairs;    Electric transportation;    Mechanical and electrical;    Safety features;    Stopping distance;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/469/1/012104/pdf
DOI  :  10.1088/1757-899X/469/1/012104

学科分类：工业工程学

来源: IOP

【 摘 要 】

Braking is the necessary system need to install as the safety feature for the moving transportation. Using the mechanical braking only as primary braking system in Electric Transportation (ET) is insufficient due to some issues such as low strength users hand gripping and abruptly tire locking during braking especially on wet surface condition. In this paper, the performance between mechanical and electrical braking which is by using dynamic braking concept is proposed to enhance the braking performance of Electric Powered Wheelchair (EPW). The experiments were conducted during descending on the slope under wet and dry pavements. From the results of slip ratio, the slipping time between mechanical and dynamic braking in dry pavement is recorded 0.9 seconds and 0.7 seconds respectively. Meanwhile, it is observed that tire is fully locked-up for mechanical braking under the wet surface. However, by using the dynamic braking, the wheel does not lock-up and the slipping time was recorded 1.4 seconds. It can be considered that, mechanical and dynamic braking give their own merit. The high braking torque from mechanical braking is suitable to use under the dry pavement for the short stopping distance. The other sides, braking under the wet pavement, dynamic braking is more efficient compare to the mechanical braking in term of short slipping time and does not cause tire to lock-up while braking.