According to the self-excitation doubly salient retarder’s braking torque equation and dynamic equation, its braking torque model and the vehicle’s dynamics model can be built using Matlab/Simulink. The simulation results show that the relationship of automobile braking torque, excitation current and retarder speed, and that the variation of vehicle deceleration rate. This method can optimize t...

Sediment erosion not only reduces efficiency and life of hydropower turbines but also causes problems in operation and maintenance. Several factors are responsible for this erosion in hydro turbine components. This paper presents the sediment erosion types in hydraulic turbines and their components based upon an extensive literature review and the field observation at Cahua hydropower plant, Pe...

As part of ongoing research, a wheelchair dynamometer has been designed and built. This device is complex test stand, enabling research on the operation wheelchairs, taking into account number biomechanical factors in laboratory conditions. Based review available literature, braking system was constructed as drive system. resulted design issue concerning optimal selection electromechanical comb...

In a naturalistic study of teenage drivers (N = 42) hard braking events of ≤-0.45 g were assessed over the first 6 months of licensure. A total of 1,721 hard braking events were recorded. The video footage of a sample (816) of these events was examined to evaluate validity and reasons for hard braking. Of these, 788 (96.6%) were estimated valid, of which 79.1% were due to driver misjudgment, 10...

This paper presents results from a series of evolutionary robotics simulations that were designed to investigate the informational basis of visually-guided braking. Evolutionary robotics techniques were used to develop models of visuallyguided braking behavior in humans to aid in resolving existing questions in the literature. Based on a well-used experimental paradigm from psychology, model ag...

It is desirable for driving support systems to improve the safety of driver vehicle systems, and at the same time to have a performance that does not make individual drivers feel uncomfortable. Since human beings have various control characteristics, any system that supports driving under fixed conditions without taking such characteristics into consideration cannot be a driving support system ...

In this paper, an antilock–antiskid braking system controller, which has been designed for stability enhancement of vehicles during braking and turning, is presented. Using available signals, a novel structure is proposed for vehicle stability improvement for critical driving conditions such as braking on slippery or μ-split road surfaces. In conventional vehicles, undesired lane changes may oc...

Train braking is a very complex process, specific to rail vehicles and of great importance by the essential contribution on the safety of the traffic. This complexity results from the fact that during braking occur numerous phenomena of different kinds mechanical, thermal, pneumatic, electrical, etc. The actions of these processes take place in various points of the vehicles and act on differen...

This paper presents recent results of on-going research to build new maps of driver performance in car-following situations. The novel performance map is comprised of four driving states: low risk, conflict, near crash, and crash imminent – which correspond to advisory warning, crash imminent warning, and crash mitigation countermeasures. The paper addresses two questions dealing with the appro...