08-16-2017, 10:37 PM
smart shock absorber automobile pdf
Abstract
Engineers have created a "smart" shock absorber that can quickly change its cushioning characteristics without input from an electronic controller. The new shock absorber provides a softer ride over bumpy surfaces with with greater control of the vehicle during hard cornering.The new shock absorber is purely mechanical. It eliminates the need for automakers to embark on costly development programs and write specialized algorithms. It can be used on any size vehicle, from the smallest compact to a full-size truck, which is Known as the Monroe Reflex shock absorber. The new shock absorber is fast-acting valve.The Impact Sensor allows the Reflex to behave like a conventional shock absorber. The valve provides additional flow to dampen the impact. Three main parts of the Impact Sensor are a powder metal element; a spring; and a valve body. The powder metal element acts as a mass that bears against the spring. The mass and the spring move together When the vehicle drives along a smooth road. The shock absorber IS enabling the new cars in Pakistan to strike a balance between control and cushioning.Smart Shock Absorbers are a vital part of the vehicle suspension ,which keep your wheels in contact with the ground at all times by absorbing the energy from the coil spring. If you find that your car is not handling then you could have a shock absorber problem. Smart Shock absorbers are vital components of a car together with dampeners, struts and springs they deliver a smooth ride. Shock absorbers do eventually wear out and should be replaced by high quality shock absorbers.The shock absorber can be diverted to its power train to increase battery life. An active mechanical and electronic system optimizes the damping and provide a smoother ride than conventional shocks while generating electricity to recharge the batteries or operate electrical equipment. It has been attempted to generate electricity with the help of the shockers used in the cars for sale in Pakistan. A regenerative shock absorber converts parasitic intermittent linear motion and vibration into useful energy.The electricity generated by the shock absorber can be diverted to its power train to increase battery life When used in an electric vehicle or hybrid electric vehicle. The electricity can be used to power accessories such as air conditioning In non-electric vehicles. Several different systems have been developed which are still in stages of development and not installed on production vehicles.In this work, we develop novel control algorithms suitable for the smart shock absorber (SSA) component of the intelligent vehicle and bridge system (IVBS).
The SSA control serves two IVBS purposes:
1) working as the vehicle suspension to increase driver comfort and controllability when the vehicle is on the pavement, and
2) reducing the vibration of highway bridges and thus prolonging bridge life. We propose and discuss in this paper algorithms targeted at the first purpose. Based on the application of active noise control techniques to an active suspension system, we introduce the clipped active noise control (clipped ANC) algorithm. The main advantage of this algorithm is that because it is adaptive, it can effectively balance the comfort and controllability. A simplified control algorithm based on the clipped ANC is also proposed to reduce the implementation cost. The simplified algorithm has no requirements for system modeling, so it substantially reduces the implementation cost. The effectiveness of our proposed algorithm is indicated by analyses, simulations and laboratory testing.