Optimization of Speed Control Hump Profiles

Başlamışlı, S. Çağlar; Ünlüsoy, Y. Samim

doi:10.1061/(asce)te.1943-5436.0000002

Cited by 16 publications

(8 citation statements)

References 5 publications

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“…Speed bump is used to keep uniform and low speed on residential zones or to reduce speed at specific locations [11]. Speed bump brings security, but vehicle vibration is increased and ride comfort becomes worse at the same time [12,13].…”

Section: Resultsmentioning

confidence: 99%

“…International Standard Organization (ISO) has proposed the mechanical model of supine patient, and provided the condition and method for applications [10]. Moreover, excitations caused by speed bump would aggravate the pain of patient and reduce the operational efficiency of driver [11][12][13][14], so a speed pump model should be built. To the best of our knowledge, there are no studies on ride comfort of ambulance under speed bump considering both supine patient and driver.…”

Section: Introductionmentioning

confidence: 99%

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Multi‐objective optimization of ambulance ride comfort under speed bump

Guo

Wang

et al. 2019

IEEJ Transactions Elec Engng

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Ambulance ride comfort not only impacts health of patients, but influences handling capability of drivers. Previous studies on ambulance ride comfort mainly focused on analysis and optimization of ride comfort of supine patients, but ride comfort of drivers was ignored. For solving this problem, a 10°‐of‐freedom (DOF) vibration model of ambulance was established, and a supine patient on stretcher and a driver on seat were included in the model. The excitations on front and rear wheel were proposed according to speed bump, which have a great impact on occupants. The objective function and design variables of multi‐objective optimization were determined, and the parameters of design variables were solved by using Elitist Nondominated Sorting Genetic Algorithm (NSGA‐II). Based on the parameters before and after optimization, ride comfort of supine patient and driver was analyzed. The results show that ride comfort of supine patient and driver in ambulance under speed bump was improved 20% and 7%, respectively, and ride comfort of supine patient and driver in ambulance under random road was increased by 9% after optimization. Multi‐objective optimization of ambulance ride comfort under speed bump can improve ride comfort of supine patient and driver, and has a good optimal effect. © 2019 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multi‐objective optimization of ambulance ride comfort under speed bump

Guo

Wang

et al. 2019

IEEJ Transactions Elec Engng

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“…Vehicle body bounce and pitching motion are considered as the effective source of discomfort due to the resulting longitudinal acceleration [14], [15]. Accordingly, classical half vehicle model with a 4-DOF which combine both of the vehicle body pitch and the bounce motions are considered in this study [14] as seen in Fig. 2.…”

Section: Vehicle Modelmentioning

confidence: 99%

“…Figure 2. Half vehicle model [14], [15] Table I shows the vehicle specifications of a medium size passenger car which was adopted from ref. [14] to be used in the analysis.…”

Section: Vehicle Modelmentioning

confidence: 99%

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Passive Suspension System Optimization Using PSO to Enhance Ride Comfort when Crossing Different Types of Speed Control Profiles

Elsawaf¹,

Vampola²

2015

JTLE

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The vehicle suspension system design plays an important role in the ride comfort of the passengers. In this study, the optimum design for a passive suspension system of a passenger vehicle is investigated to enhance the ride comfort for the passenger when crossing different types of speed control profiles (SCPs) while the allowable speed limit is not violated. The vehicle-passenger system is represented as a mathematical model consists of 4 degrees of freedom (4-DOF). The optimization problem aims to minimize the root mean square (RMS) of the passenger vertical acceleration subject to constraints on the maximum passenger vertical acceleration, the suspension travel, the static deflection, and the natural frequencies of both the bounce and the bitch movements. The optimization design parameters are the front suspension stiffness, the front dynamic coefficient, the rear suspension stiffness and the rear dynamic coefficient. This optimization problem is solved using the particle swarm optimization technique (PSO). Seven different speed control profiles are considered in this study to simulate and assess the vehicle performance. According to the simulation results, the optimized passive suspension system with PSO has superior performance compared with the classical passive suspension system. Index Terms-passive suspension optimization, 4-DOFvehicle model, speed control, ride comfort, PSO His interested research areas are structural optimization, dynamic systems response, vibration control, thermal stresses suppression, modeling and identification of non-linear systems, smart materials application, and optimization of mechanical systems. Prof. Tomáš Vampola obtained his M.Sc in applied mechanics from the CTU in Prague. After his graduate studies he worked in the Car Research Institut in Prague, where developed the computational effective algorithm for FE method for large structure. This was followed by a move to the CTU in

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