TAILIEUCHUNG - Intelligent Vehicle Technology And Trends Episode 2 Part 6

Tham khảo tài liệu 'intelligent vehicle technology and trends episode 2 part 6', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 282 IVs as Human-Centered Systems In normal highway driving drivers tend to focus on the lane they are traveling in and on any vehicle just ahead of them to maintain proper lane position and headway. In effect this leads to a narrowing of the field of vision and also accelerates rates of physical and mental fatigue. The HIDS was designed to free up drivers attention so that they can monitor the road scene more comprehensively at the same time reducing fatigue. The premise is that vigilance is increased by giving the driver assistance in monotonous driving tasks. A key principle implemented in the HIDS is that the system actively monitors driver steering inputs and will only continue operating if the driver is actively engaged in parallel with the system inputs. Algorithms monitor steering wheel torque applied by the driver and calculate the total torque needed to maintain the lane. If the driver does not provide enough torque to reach a reference point or if the driver has not provided a steering input over a certain period of time the assistance temporarily stops and the driver is alerted to perform an operation which causes him or her to reengage. This process is illustrated in Figure . Honda engineers tested the system on motorways by asking test subjects to drive maintaining a fixed headway to the vehicle ahead and maintain the vehicle within the lane at a fixed speed of 100 kph. To test the premise that HIDS would allow better visual scanning of the road environment the driver s eye movement eye angle and angular speed was monitored. The results shown in Figure show that horizontal scanning doubled and vertical scanning increased as well. With regard to eye angular speed eye movements during conventional driving were slower compared to those when using HIDS. Researchers concluded that there is a reduction in the amount of time the eye movement is fixed while using HIDS . the eyes are more agile . Again this supports the thesis of improved .

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