بناء جهاز اختبار مقعد السائق مع دراسة محاكاة للتحكم التربيعي الخطي

Construction of Driver’s Seat Test Rig with Simulation Study of Linear Quadratic Control

There is an increasing concern to enhance the heavy-duty vehicle driver’s seat suspension system to reduce the vibration transmitted to the driver’s body. These vibrations are caused by the road condition and affect the driver’s efficiency, performance, and health. Establishing and developing a driver’s seat suspension system has been vital in the last years, which has great attention from researchers and companies to gain more ride comfort and ride safety.
Hence, this thesis has designed and built up a passive test rig seat by creating and assembling the parts with adopted some globally applicable models. An analysis of a passive seat suspension system was carried out. A comparison between the simulation and experimental results was achieved to check the validation of the test rig. It was found that the driver’s seat test rig manufactured is active, suitable, and low cost.
To complete a full picture of the seat test rig, it is suggested to study and analysis an active seat system through designing a Linear Quadratic Regulator LQR controller and see whether how much the enhancement in the ride comfortably and road handling happen via reducing the vertical vibration transmitted to the seat pan through dropping the vertical seat pan acceleration. MATLAB/Simulink environments chosen for simulation works to check the performance of LQR controller design. Analysis of the driver’s seat test rig model with a two degree of freedom was performed. The simulation results show that the LQR controller is robust, suitable, and has a better potential to reduce the vertical acceleration by an approximated range of 83% and achieve ride comfort, with low cost for this system; by means of considering an optimal value for control input weight matrix R and state weight matrix Q, they affected the control action. LQR controller within considering the control cost.