Dynamic Stability of Off-Road Vehicles
摘要
The determination of dynamic stability is based on results obtained from static measurements and static models, with the displacement of the COG being the crucial parameter. Prior to conducting the main experiment, the test ground must be carefully inspected, and basic parameters such as slope angle, path dimensions, and soil humidity must be evaluated. For a more accurate description of future experiments, the type and condition of ground vegetation should also be identified. Before testing begins, several preparatory steps must be completed on the vehicle. Sensors should be mounted in the plane of the COG to simplify the formulation of motion equations. All sensors and measuring devices must be installed in the laboratory and inspected to ensure conformity with the experimental design plan. An appropriate stochastic process methodology should be developed and verified for accuracy. The equations of motion must then be formulated using filtered excitation functions as inputs. A solid mathematical foundation must be established for solving the system of differential equations describing the vehicle’s motion. These equations are based on the principles of applied mechanics governing the three-dimensional motion of a rigid body. The complete mathematical model—including data filtering techniques, numerical calculations, and result evaluation—should be integrated into a dedicated computer program written in an appropriate programming language (e.g., VC++, VC#, or VB). Once all preparatory procedures meet the specified requirements, the experimental process can be initiated, conducted, and evaluated. Upon completion, the simulation phase should also be finalized and analysed.