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In this paper, the vertical dynamic characteristics of unmanned ground vehicle (UGV) with rocker suspension are studied. A mathematical model is established to investigate the vertical dynamic characteristics of three-axle UGV with rocker suspension. This mathematical model is validated by the multi-body dynamics software Adams. The pitch angle acceleration of vehicle is selected as the evaluation...
Terrestrial laser scanning (TLS) can acquire high-precision point cloud data within a short time span and it has received a lot of attention in the study of forest structures. In this study the height and diameter at breast height (DBH) of larches are estimated based on TLS data and then the larch allometric model is used to estimate the above-ground biomass (AGB) of single tree in plots located at...
Filling depressions is a commonly used preprocessing step for the automatic extraction of drainage networks from raster digital elevation models (DEMs). The Priority-Flood algorithm is the fastest depression-filling algorithm for floating-point DEMs. Most of the variants of the Priority-Flood algorithm processes disjoint depressions using one single priority queue, without taking advantage of the...
A novel heading predictive control model for autonomous ground vehicles is proposed in the present paper. The developed approach includes a nonlinear vehicle dynamic model which takes the actual tire side — slip characteristics into account and a new predictive function obtained from the stationary solution of the 2DOF vehicle dynamic model. The effectiveness of the new heading predictive control...
The node localization process of the traditional DV-Hop scheme is sensitive to the heterogeneity of network topology, and the robustness of the scheme is poor while the network topology is diversiform due to random node deployment. Aiming at such a problem, an improvement strategy is put forward, and different treatment algorithms are introduced in the distance estimation step and the position calculation...
With the development of microprocessors, voltage regulator module (VRM) is required to have many strict and challenging specifications. Its main topology and control scheme must follow the fast-developing trend. Two-stage VRM can solve issues such as the increasing input voltage, improving power and quickly dynamic response. It is easy to achieve the goal of high frequency, current division and high...
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