Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 29 for “"ride comfort"”.
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Characterization of whole-body vibration for monorail passenger ride comfort
… while maintaining its original landscape. Ride comfort is the basic requirement for every passenger in all kind of public transports. In monorail, vibration is considered as major factor of discomfort, it transmitted to human body, which contribute many health issues. The aim of this study …
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The effect of wing flexibility on ride comfort in formation flight
The paper addresses the issue of passenger ride comfort during formation flight. The study focuses on the vibration attenuation that occurs due to the aeroelastic effect, more particularly, on the influences these effects have on the magnitude of the fuselage accelerations. No distinction is made …
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Tyre Inflation Pressure control to improve vehicle ride comfort on rough roads
… pressure has an influence on tyre enveloping and ride comfort. To take advantage of the influence of tyre pressure on ride comfort, a pressure controlled tyre was developed to vary the tyre pressure, thus varying the tyre characteristics as the road conditions change to improve ride comfort. …
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Preview based Semi-Active Suspension Control
While semi-active suspensions help improve the ride comfort and road holding capacity of the vehicle, they tend to be reactive in nature and thus leave a lot of room for improvement. Incorporating road preview data allows these suspensions to become more proactive rather than reactive and helps …
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Modeling, Development and Experimental Validation of different Control Strategies for a Double-Damper Semi-Active Suspension System
… directly related to the subjective qualities of ride comfort that the passengers perceive. A vehicle suspension works by insulating the driver and the passengers from the irregularities of the road. Moreover, a suspension is required to ensure the tires properly contact the surface for adequate …
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Development of a Multi-Body Nonlinear Model for a Seat-Occupant System
… of today's cars, which directly affects ride comfort experienced by occupants. Currently, the process of ride comfort evaluation is subjective. Alternatively, the ride comfort can be evaluated by a series of objective metrics in the dynamic response of the occupant. From previous studies …
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Analysis And Modeling Of The Eds Maglev System Based On The Halbach Permanent Magnet Array
… a control mechanism is needed for stability and ride comfort control. The six degree of freedom (DOF) dynamics, and the vehicle's mass center offset effects on those dynamics were investigated with multiple passive and active magnetic forces. The results indicated that the vehicle's mass center …
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Neural network identification of quarter-car passive and active suspension systems
… feedback controllers to optimize the passenger ride comfort, road handling and car controlling. Linear stochastic optimal control will be employed to design an active controller in vehicle active suspension model. The active suspension model will be simulated and compared with the car's passive …
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Control and simulation of an active suspension system
… for the particular test rig in terms of ride comfort and handling. It has been shown that the MIMO PID performs the best. The effects of the nonlinearity and limited bandwidth of actuators were also investigated in the nonlinear model, which resulted in a novel explanation for the …
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A Structured Approach to Defining Active Suspension Requirements
… technologies are well known for improving ride comfort and handling of ground vehicles relative to passive suspensions. They are ideally suited for mitigating single-event road obstacles. The work presented in this thesis aims to develop a structured approach for finding the peak force and …
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An analytical study of ride and handling performance of an interconnected vehicle suspension
… involves a difficult compromise among the ride, handling and directional control performance characteristics. While a soft suspension is desired to enhance ride quality, hard suspension springs are required to achieve good handling and directional control performance. Auxiliary roll …
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Design, Modeling and Control of Vibration Systems with Electromagnetic Energy Harvesters and their Application to Vehicle Suspensions
… energy harvester can possibly improve ride comfort of vehicles over conventional oil dampers and simultaneously harvest the associated vibration energy.
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Modal Analysis of a Discrete Tire Model and Tire Dynamic Response Rolling Over Short Wavelength Road Profiles
… models to tune the suspension system for optimal ride comfort. An in-plane rigid–elastic-coupled tire model was used to examine the 200 DOF finite difference method (FDM) modal analysis accuracy under non-ground contact and non-rotating conditions. The discrete in-plane rigid–elastic-coupled tire …
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Effect of Control Techniques on the Performance of Semiactive Dampers
… of this model has a direct bearing on the ride comfort and vehicle handling, when the single suspension is interpreted as a partial model of a vehicle. The dynamic results obtained when using two alternative semiactive control methods are compared to the results obtained when using the more …
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Human Perception of Transient Longitudinal Vehicle Motion
Human perception of discomfort during transient longitudinal motion of a vehicle is little understood. Optimizing vehicle motion to maximize occupant comfort is of great interest to vehicle manufacturers. The imminent wide-scale deployment of autonomous control has further increased the attention …
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Effects of Frame Design and Cab Suspension on the Ride Quality of Heavy Trucks
… trucks were investigated to see their effects on ride comfort. Four trucks were used in this study, each with a different frame: a factory low frame, a lightweight low frame, a factory high frame, and a lightweight high frame. There were two different frame heights and three thicknesses. Two …
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The design and performance of non-linear vibration isolating materials.
… and fluidic damping, required to enhance the ride comfort provided by a particular seat system. At higher vibration amplitudes experimental determinations show that the cushion foam behaves in a non-linear manner with strain dependent properties and several degrees of freedom. Above a certain …
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Control of Vibration Systems with Mechanical Motion Rectifier and their Applications to Vehicle Suspension and Ocean Energy Harvester
… gearbox can be effective in improving vehicle ride comfort by 29.2% compared to that of the traditional hydraulic suspension. In the ocean wave energy converter, the controlled MMR WEC with simple latching control can improve the power generation by 57% compared to the passive MMR WEC. Besides, …
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Active suspension co-design for lateral stability of rail vehicles
… suspensions to improve stability, ride comfort and ride quality at high speeds. The dynamic performance of such mechatronically-controlled suspension systems is related closely to the congruence of the design of passive elements in conjunction with the chosen control system …
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