## 3 Materials and Methods  
### Proposal of Measurement Methodology  
As can be seen from the review of the literature, for many calculations in the field of vehicle dynamics, as well as loads and other objects, it is necessary to know the exact position of their center of gravity. At the same time, currently, the position of the center of gravity is either estimated with large deviations and simplifications or is determined experimentally with expensive devices and equipment. In the next part of this article, a significantly innovative methodology for finding the center of gravity will therefore be presented. To calculate the position of the center of gravity in the horizontal direction, it is necessary to know as precisely as possible the wheelbase of the axles and the instantaneous weights falling on the axles of the vehicle. The wheelbase, i.e., the distance between the centers of the wheels of two adjacent axles, can be determined from the technical documentation of a specific vehicle or by measuring with ordinary length scales. The instantaneous weight falling on the individual axles of the vehicle--or in the case of the need to calculate the position of the center of gravity in the horizontal transverse direction, the instantaneous weight falling on the individual sides of the vehicle--is determined by weighing. Common axle car weight scales have insufficient measurement accuracy--of around 5 kg--and special laboratory scales with higher measurement accuracy are financially very demanding. For the methodology presented in this article, it is suggested to use a pallet truck with a scale. The pallet truck with scale is a scale with a weighing division of 0.5 kg. Pallet trucks with scales used in logistics and in stores are regularly calibrated and their measurement accuracy verified. The procedure for determining the position of the vehicle's center of gravity in the horizontal direction is as follows:  
1. Ensuring that vehicle tanks--fuel tank, washer fluid tank, etc.--are either full or empty. Ensuring that any cargo in the vehicle cannot move freely. \begin{table}
\begin{tabular}{c c} \hline \hline
**Author and Year** & **Research Focus** \\ \hline \hline
1.1 & Use of the Monte Carlo method and using known vehicle parameters. Neglecting the impact of suspension, damping, and tire characteristics on the change in the center of gravity’s height. \\
2.2 & Estimation of the center of gravity’s height based on data obtained from displacement and velocity sensors. Such estimations have mean absolute errors of 14.2\% and 5.0\% of the state amplitude, respectively. \\
3.3 & Identification of a specific vehicle model by sensors and subsequent assignment of the center of gravity’s position from a database, regardless of the actual vehicle load. \\
4.4 & Estimation of the center of gravity’s position based on data obtained from specialized sensors in the tires, with errors exceeding 30\%. \\
5.5 & Experimental measurements based on the vehicle’s moments of inertia. The equipment is very money-demanding with deviations exceeding 20\%. \\
6.5 & Experimental measurements using readily available tools and aids. \\ \hline \hline
1.2 & \\ \end{tabular}
\end{table} 
Table 1: Literature review. 2. Ensuring correct tire pressure. The correct tire pressure is prescribed by the manufacturer. 3. Determination of the wheelbase value from the vehicle's technical documentation or by measuring the distance between the wheel centers of adjacent axles. 4. Selection of suitable pallets, prisms, beams, grates, or thick boards strong enough to support the weight of the vehicle. 5. Check the weighing accuracy of the pallet truck with a scale. Verification of the calibration sheet of the pallet truck with a scale and other technical documentation. Checking the accuracy of weighing using weights with a known weight. Instead of a pallet truck with a scale, pallet scales can also be used if they have a weighing division of 0.5 kg or less. 6.