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 27 for “"Active Suspensions"”.
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Theory and simulations of confined active suspensions
The modeling of active suspensions, or suspensions of self-propelling particles such as swimming microorganisms remains a great challenge despite their ubiquity in biological systems. The long-ranged fluid-mediated interactions between suspended particles in the low-Reynolds-number regime are known …
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The effect of coupling in automotive active suspensions
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1985.
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Analysis and Simulation of Kinetic Model for Active Suspensions
… we study the recently proposed kinetic model for active suspensions, where the active particles are assumed to be rigid rod and are driven in the suspension either by their own biological/chemical forces or external electric/magnetic fields. We first study the stability of the isotropic suspension …
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Control law designs for active suspensions in automotive vehicles
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1988.
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The design of semi-active suspensions for automotive vehicles
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1989.
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Multi-Scale Probing of Colloidal Sedimentation Dynamics in Active Suspensions
… the sedimentation of passive particles within active fluids. Lastly, I explored the interactions between particles and bacteria in the presence of gravity, uncovering that bacterial-induced convective motions reduce the convective transport of colloidal particles. By increasing bacterial …
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Analysis and Development of Control Methodologies for Semi-active Suspensions
Semi-active suspensions have drawn particular attention due to their superior performance over the other types of suspensions. One of their advantages is that their damping coefficient can be controlled without the need for any external source of power. In this study, a handful of control …
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The influence of finite bandwidth actuators on rail vehicle active suspensions
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1982.
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Performance of pneumatic active suspensions subject to impulsive and random disturbances
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1984.
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Three-dimensional kinetic simulations of active suspensions: effect of chemotaxis and steric interaction
… effects of chemotaxis and steric interactions in active suspensions are analyzed by extending the kinetic model proposed by Saintillan and Shelley [1, 2]. In this model, a conservation equation for the active particle configuration is coupled to the Stokes equation for the flow arising from the …
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A Structured Approach to Defining Active Suspension Requirements
Active suspension 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 …
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Impacts of managed realignment on low-lying coasts
… on the design of advanced suspension systems (active and semi-active) using time-domain optimal control methods. This work has been strongly motivated by the need to develop an approach to active and semi-active suspensions which was ready to be applied directly in a prototype vehicle, and …
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Active Suspension Design Requirements for Compliant Boundary Condition Road Disturbances
… on the operating conditions of a vehicle. Active suspensions are far more effective over a variety of different road conditions compared to passive suspension systems. This is because of their ability to store and dissipate energy at different rates. Additionally, they can even provide …
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An Advanced Controller for a Semi-active Wheelchair Suspension
<p>An Advanced Controller for a Semi-Active Wheelchair Suspension was designed, built and tested. The suspension consisted of a Goodyear 1S3-011 air spring, IQ Valves high speed proportional solenoid valve, and a custom made accumulator. Several controller designs specific to semi-active …
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Investigation of viscosity effects on bacteria collective motion using particle image velocimetry
… the swimming patterns that result from injecting active suspensions of bacteria with fluids of different viscosity are investigated.
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Semi-active damping of heavy vehicles.
This thesis is concerned with the use of semi-active suspensions in heavy vehicles to improve ride and reduce road damage. An introduction into the subject is given in chapter 1 and a review of the relevant literature is presented at the beginning of each main chapter. The development and modelling …
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An Invertible Open-Loop Nonlinear Dynamic Temperature Dependent MR Damper Model
… damper is a commonly used component in semi-active suspensions that achieves a high force capacity and better performance than a passive system, without the added expense and power draw of a fully active system, all while maintaining failsafe performance. To fully exploit the capabilities of …
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Controle inteligente de vibrações utilizando amortecedor magneto reológico
… and structures subject to seismic earthquakes; active or semi-active suspensions in the automotive industry, as well as clutch and brake systems; and in the biomechanics area with intelligent protheses and haptic interfaces wich simulate the tactile sensing. MR dampers feature several desirable …
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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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Energy Harvesting Hydraulically Interconnected Shock Absorber: Modeling, Simulation and Prototype Validation
… interconnected suspension. While certain active or semi-active suspension technologies enable the shock absorbers to compensate for the effects of the road disturbances using external power input, hydraulic linked suspension is still passive and lacks adaptivity. In order to adjust the …
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