Abstract
The purpose of the article is to present a point of view on determining the mass moment of inertia coefficient of a tracked vehicle. This coefficient is very useful to be able to estimate the performance of a tracked vehicle, including slips in the converter. Determining vehicle acceleration plays an important role in assessing vehicle mobility. Additionally, during the transition from the Hydroconverter to the hydro-clutch regime, these estimations become quite difficult due to the complexity of the propulsion aggregate (engine and hydrodynamic transmission) and rolling equipment. The algorithm for determining performance is focused on estimating acceleration performance. To validate the proposed model, tests were performed to determine the equivalent reduced moments of inertia at the drive wheel (gravitational method) and the main components (three-wire pendulum method). The dynamic performances determined during the starting process are necessary for the validation of the general model for simulating the longitudinal dynamics of the vehicle. Finally, the differential and algebraic equations of the virtual model approximate more accurately the actual process of the operation of the vehicle. The virtual model, through the data obtained from the simulation process, allows for the determination, indirectly, of the variation of the mass moment of inertia coefficient and its expression of approximation.
Highlights
The acceleration resistance generated by the inertial forces during the starting process of the vehicle depends on its weight and on the rotating masses, from the traction engine elements to the vehicle tracks [1]
Obtain of the of of the inertia masses, distinct methods were used: indirect, based on the signalsbased generated from the coefficient of three inertia masses, three distinct methods were used: indirect, on the signals interrogation of the virtual model; direct, which takes over the data resulting from the gravitational generated from the interrogation of the virtual model; direct, which takes over the data resulting from and pendulum tests; empirical, which is an analytical–experimental thethree-wire gravitational and three-wire pendulum tests; empirical, which is method
The results obtained by the computer-assisted gravitational method are more accurate than those obtained by the classical gravitational method
Summary
The acceleration resistance generated by the inertial forces during the starting process of the vehicle depends on its weight and on the rotating masses, from the traction engine elements to the vehicle tracks [1]. According to the relation of the moments of inertia δ [-] [2], the resistance generated by the inertia of the rotating elements depends on the mass and on their radius. The mobility and stability of a vehicle on wheels or tracks are influenced by the moment of inertia [7] and by the place (on the ground) where gravity acts [8,9].
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