This paper presents pith plane dynamic model of a cargo truck. Numerical simulations for determination of a pitch angle and deflection in front and rear suspension under braking on railway crossing are conducted. | Reducing pitch angle and suspension jounces of a truck when braking on railway crossing by control of semi-active suspension International Journal of Mechanical Engineering and Technology IJMET Volume 10 Issue 03 March 2019 pp. 1584 1592 Article ID IJMET_10_03_159 Available online at http ijmet JType IJMET amp VType 10 amp IType 3 ISSN Print 0976-6340 and ISSN Online 0976-6359 IAEME Publication Scopus Indexed REDUCING PITCH ANGLE AND SUSPENSION JOUNCES OF A TRUCK WHEN BRAKING ON RAILWAY CROSSING BY CONTROL OF SEMI- ACTIVE SUSPENSION N. L. Pavlov Department of Combustion Engines Automobile Engineering and Transport Faculty of Transport Technical University of Sofia 8 Kliment Ohridski Blvd. 1000 Sofia Bulgaria ABSTRACT This paper presents pith plane dynamic model of a cargo truck. Numerical simulations for determination of a pitch angle and deflection in front and rear suspension under braking on railway crossing are conducted. The change of the braking force is presented by trapezoidal form similar to the theoretical law of variation of braking deceleration in the braking diagram of road vehicles. For the railway crossing profile trapezoidal function is used too. The numerical simulations are carried out in program field of MATLAB. After conducting tests for determination of a braking dynamics and braking properties of a truck in road conditions the pith plane model is validated. Possibilities for pitch angle and suspension jounces reduction are given. A fifth wheel assembly displacement sensors and data acquisition system are used in the road tests. Key words Dynamic model truck simulation and road test Cite this Article N. L. Pavlov Reducing Pitch Angle and Suspension Jounces of a Truck When Braking on Railway Crossing by Control of Semi-Active Suspension International Journal of Mechanical Engineering and Technology 10 3 2019 pp. 1584 1592. http IJMET JType IJMET amp VType 10 amp IType 3 1. INTRODUCTION Road .
