A two-layer fuzzy logic controller has been designed for 2-D autonomous navigation of a skid steering vehicle in an obstacle filled environment. The first layer of the fuzzy controller provides a model for multiple sonar sensor input fusion and it is composed of four individual controllers, each calculating a collision possibility in front, back, left and right directions of movement. The secon...

This study considers the utilization of bitumen modified with molten polyethylene terephthalate (PET) waste bottles as an alternative binder in paving blocks. PET was used at 2, 4, 6, 8, and 10% to modify production Compressive strength test skid resistance were conducted on block samples evaluate their mechanical properties, while water absorption Cantabro abrasion tests carried out ascertain ...

Designing controllers for skid-steered wheeled robots is complex due to the interaction of tires with ground and wheel slip skid-steer driving mechanism, leading nonlinear dynamics. Due recent success reinforcement learning algorithms mobile robot control, Deep Deterministic Policy Gradients (DDPG) was successfully implemented an algorithm designed continuous control problems. The dynamics vehi...

In 1953, drivers in the United States became involved in 31,450 fatal and 1,302,000 non-fatal accidents. Many of these accidents were primarily the fault of the drivers involved, but a great number might have been minimized or prevented by safer highways. Although many factors are involved in the building of safety into highways, one of the more important items is the resistance of pavement sur...

Integrating robots in complex everyday environments requires a multitude of problems to be solved. One crucial feature among those is equip with mechanism for teaching them new task an easy and natural way. When tasks that involve sequences different skills, varying order number these it desirable only demonstrate full executions instead all individual skills. For this purpose, we propose novel...

Texture is required on road pavements for safe vehicle braking and manoeuvres. This paper provides a unique analysis of long-term texture obtained using traffic speed condition survey (TRACS) data from 14 sites, located along north to south transect spanning the longest highway in UK. A total 19 years sensor measured depth (SMTD) have been analyzed spatial filtering techniques compared with met...

Abstract In ice and snow weather, the surface texture characteristics of asphalt pavement change, which will significantly affect skid resistance performance pavement. this study, five mixture types AC-5, AC-13, AC-16, SMA-13, SMA-16 were prepared under three conditions original state, snow. paper, a 2D-wavelet transform approach is proposed to characterize micro macro The Normalized Energy (NE...