Investigation of Forced Frequency in a Commercial Vehicle Suspension System

Vehicle suspension plays a vital role in maintaining the center of gravity to achieve perfect balancing of the vehicle to provide the comfortable ride. While designing the suspension system of automobile, vibration is the main aspect to be considered. This paper aims to analyze the automobile front and rear suspension for a four wheeler using analytical and numerical approach. Existing details of the suspension is collected using the concept of reverse engineering. Natural and forced frequency of the front and rear suspension system is calculated theoretically based on the collected data's. The natural frequency and forced frequency is numerically computed for front and rear suspension. The amplitude of vibration is reduced by replacing the spring material and its forced frequency is reduced by 1.18 % and 1.56 % for front and rear suspension system respectively. This result reveals that low carbon steel has ability to reduce the forcing frequency and can produce comfort ride.

A Comparative Study On McPherson Strut Suspension System And Double Wishbone Suspension System

Now a days, the two most commonly used suspension system in automobiles are the McPherson Strut uspension System and Double Wishbone Suspension System. A vehicle is provided with the suspension system in order to provide a comfortable ride to the passengers and to avoid additional stresses in the vehicle frame. This paper contains the comparative study between McPherson Strut Suspension System and Double Wishbone Suspension System. The comparison is obtained by considering various parameters like Basic differences of the system their Geometry, Kinematic Analysis, ANSYS Simulation which includes structural analysis with static and dynamic loading, Graphical representation of Wheel position vs Camber.

Calculation of the speed of movement on the side track for flat grades of switches

There is a need to speed up the design and implementation of switches on the operated railway network, which can significantly increase the allowed speed of trains, especially on the side track. One of the starting points in the design of switches for high speeds is to provide passengers with a comfortable ride when the train is moving on a side track by limiting the values of the so-called centrifugal acceleration and the increment (change) of the centrifugal acceleration per unit of time (second). If it is necessary to implement the speed of movement on the switch to the side track over 50 km/h, the main factor in determining the radius of the transfer curve under the conditions of driving comfort is to limit the amount of increment (change) of the centrifugal acceleration per unit of time (second). Based on this, when designing switches for high speeds, it is advisable to use curves of variable radius as a translation curve.

An Air Suspension System With Adjustable Height, Damping and Stiffness Using No Viscous Dampers

Air suspension is gaining more and more popularity with both the auto industry and drivers. Traditionally the height adjustability aspect of air suspension systems has been their main attracting attribute. More recently, resolving the classic conflict of combining comfortable ride with sport handling in a single suspension setup has become the main attraction of air suspension. An air suspension system has been developed which in addition to height adjustment, can adjust its damping and stiffness in real time with using neither viscous dampers nor any additional actuators. This is done by real-time adjustment air flow to and from the air springs using proportional valves. Measured relative displacement and acceleration as well as estimated velocity of the sprung mass with respect to unspring mass at each corner are fedback, thru their corresponding gains, to create the control signal that adjusts the proportional valve with the goal of controlling the height, stiffness, and damping at that corner. In a numerical study followed by laboratory testing, the effectiveness of the proposed air suspension system in terms of its ability to vary the damping and stiffness as well as the height of the suspension system is demonstrated.

Design and Analysis of IR based Upper Dipper Light Control for Vehicles

The number of vehicles on our roads increases day by day, technology has evolved, but the safety factor must always be taken into account. Now, the vehicles are one day equipped with many security features. One of the main safety features that must be installed is the automatic control of the top bucket of the projector. This function can be used mainly during the night. The eyes of the human being are very sensitive to light, and when the eyes suddenly come into contact with the light after sunset, the cornea in the eye contracts, i. The view is empty and takes some time to restore sight. Many times, when suddenly the vehicle comes forward with the headlight in top mode, the situation blinds the driver's eyes. During this period, the vehicle covers a certain distance, in which case accidents may occur. It is lucky if the person walks quietly in this situation. To overcome this manual immersion problem, an automatic mechanism has automatically immersed the headlight when a situation occurs. This can reduce the number of accidents during the night and allow a comfortable ride. The operating principle, the mode of operation and the design of the PCB are briefly discussed in this paper.

Sign Detection Vision Based Mobile Robot Platform

<p>Vision system applied in electrical power generated mobile robot to provide a comfortable ride while providing comfort to tourist to interact with visitors. The camera is placed in front of the mobile robot to snap the images along in pathways. The system can recognized the sign which are right, left and up by using Harris corner algorithms and will be display in Graphical User Interface (GUI). A sign can be determined from the vertex coordinates according to the degree to distinguish the direction of the sign. The system will be tested in term of percentage of success in Harris point detection and availability to detect sign with different range. The result show the even though not all Harris point in an image can be detected but most of the images possible to recognise it sign direction.</p>

PUBLIC TRANSPORT IMAGE POSITIONING USING MULTIDIMENSIONAL SCALING AND CORRESPONDENCE ANALYSIS

There is still a great demand for public transportation in Malaysia and express buses are no exception. In order to stay competitive, bus companies must position their image and provide a better service for their customers. This study is intended to identify the position of express buses based on customers’ satisfaction towards the service quality by using Multidimensional Scaling (MDS) and Correspondence Analysis (CA). It is also intended to identify the presence or availability of the services/features/appearances provided by the bus company. Data were collected from 142 passengers using convenience sampling at an undisclosed Express Bus Terminal in Klang Valley. The bus companies included in this study were SExpress, KTB, MExpress, MahExpress, DExpress and CExpress. Multidimensional scaling was used to compare the position of the express buses based on the customers’ satisfaction towards the service quality while correspondence analysis was used to investigate the presence or availability of the services/features/appearances provided by the bus company. Results of the analysis show that KTB has the best performance in terms of its responsiveness and assurance in the service quality whereas SExpress has strong association with empathy service quality. MahExpress performed comparatively well on the tangible service quality. MahExpress is associated with “on board entertainment” and “comfortable ride” whereas MExpress is associated with “more leg space in the bus”. SExpress and KTB are highly competitive because passengers in the cluster perceived similar services/features regarding “driver informs passengers when the bus arrives at respective bus stations” and “bus has comfortable seats”. In conclusion, both methods have created perceptual maps that illustrate the product positions and their attributes which is important to facilitate marketing of the products and services.