Papers by Keyword: Vehicle Vibration

Abstract: Two conceptual designs of energy regenerative suspension have been developed using commercial computer aided design (CAD) software. The designs are based on the available conventional suspension. They consist of basic magnet and coil for electrical energy regeneration and additional components for magnet support and coil winding circular holder. The selection of the design is based on weighted matrix which consists of reliability, cost, time consumption and weight. The score of the matrix is formulated based on relative weighted factor among the selections. All designs are fabricated using selected and available materials. The actual cost, time consumption and weight of the suspensions are compared with the theoretical weighted scores. Standard processes of cuttings, fittings and welding are performed in fabrication. Suitable magnet design is attached on the suspensions. The other moving part of the suspensions is attached by coil and coil holder. The suspensions are tested with various strokes and frequencies for feasibility studies and energy regeneration capability using suspension test rig. The evaluation of the suspensions is performed based on actual experimental results of voltage and power regenerated.

Abstract: Abstract: Automotive vibration characteristic analysis is of great significance, the vibration influence of ride comfort, the working efficiency and good health.Therefore, measures should be taken to reduce the vibration of the vehicle and keep the working environment of comfort, to ensure the driving personnel under the condition of the motion of the complex and manipulated with good psychological state and accurate sensitive reaction.

Abstract: E-ACE (acrylic elastomer) is a kind of material so far in electro-active polymer (EAP) in the most excellent performance. Based on the analysis of the basic principle of the E-ACE power generation, the feasibility is studied on E-ACE power generation principle to achieve energy recovery and damping. Design a model damping device of vehicle for energy recovery based on E-ACE. Through analysis, when the system vibrates near the resonance frequency, deformation of spring is greater, E-ACE materials to move up and down reach the larger amplitude, and the more energy it produces. To analysis the system about harmonic response by ANSYS software, get the relationship between spring stiffness K, damping coefficient C and external incentive, then analysis the resonance frequency of the system. The simulation results verify the feasibility of the design scheme. Results show that E-ACE has excellent performance in the automobile vibration energy recovery and vibration. E-ACE will have broad application prospects.

Abstract: It is well fact known that automobiles are inefficient, wasting over 74% of energy stored in fuel as a heat. One important loss is the dissipation of vibration energy by shock absorbers in the vehicle suspension under the excitation of road irregularity and vehicle acceleration or deceleration. In this paper we design, characterize and test a regenerative electromagnetic shock absorber which can effectively recover the vibration from the road irregularity. Regeneration energy is main purpose of the design without omit vehicle comfort and handling. The dynamic model of the entire system of the electromagnetic shock absorber was proposed and described. The performance of the electric shock absorber obtained from simulations was compared toward the experiment results. Refers to the simulation, a quarter car will be able to harvest 45 Watt average power while passing C class roads with 50 km/h vehicle speed. A peak power of 45 Watt and average power of 11.43 Watt are attained from the prototype when oscillating speed of bench test at 0.1 m/s, the RMS value of suspension velocity when vehicle pass C class road with speed 50 km/h.

Abstract: In this paper, the random vibration theory is employed to research on the dynamic performance of suspension system of new energy vehicle. Based an efficient sensitivity analysis method, vehicle ride comfort and maneuverability have been investigated by suspension parameters optimization. The pseudo-excitation method has been used to analysis the dynamic responses and sensitivity, the computation performance and adaptability have been investigated by using numerical examples. Hence a convenient and accurate computation method for new energy vehicle optimization design is demonstrated and some useful conclusions are drawn.

Abstract: As one of the main reason of fatigue failure, vibration has received more attention in reliability and comfort research on vehicles. The shock from bumpy roads has a great impact to the fatigue of vehicle parts and components. The method of survey user conditions is described for the road test in the article, and three accelerating data of X, Y, Z directions of a vehicle left shaft position have been obtained with the typical user condition. Through studied the data, we have obtained the load spectrum and the power spectral density data of one car. The obtained quantitative results from the analysis can be used for evaluating the comfort of using vehicle.