الفهرس 
Introduction and Review of LiteratureOnly 14 pages are availabe for public view
 |  | from | 222 |  |  |
| | | from | 222 | | |
Abstract
In this investigation, theoretical prediction results supported by an experimental verification of the performance properties for suspension systems components have been obtained. A mathematical model describing the features of switchable damper and continuously variable damper suspension systems when it is subjected to a realistic road roughness input is set up. Linear optimal control theory is used to derive the control loops. The control gains emerge from minimising the performance index that contains the main performance parameters. A university test rig was built up, and is designed to allow a force to be applied to one end of an suspension system component by a hydraulic actuator with the other end is fixed. The system operates under displacement control (Proportional-Integral-Derivative-Controller) with load cell measurement. The test rig and the measuring facilities are available to investigate any suspension system component characteristic over a wider range of the actuator input e.g. sine wave, square, triangle, random input, step input ... etc .. The time response during switching is also studied. The quarter car test rig was based mainly on and is parameter values considered in the mathematical model used in the theoretical analysis. The process of experimental testing, automatic control theory, road profile simulation, signals processing and conditioning are utilised. Parameters are namely ride comfort, dynamic tyre load and suspension working space which have been predicted theoretical and then been experimentally. Comparisons between either theoretical or experimental results for switchable damper and continuous variable damper suspension systems have been carried out, and the performance capability of the switchable damper and continuous variable damper suspension systems are discussed. Conclusions are drawn, with the potential for future research work in this area is considered.