Abstract
With recent advances in technologies such as those of semiconductors and actuators, easy-to-control compact actuators have been actively applied in various fields such as factory automation and precision machining. In the automobile industry, major manufacturers and venture companies are also concentrating on electric vehicle development. Ultra-compact mobility vehicles, which exhibit an excellent environmental performance and are highly convenient for short-distance movement, are becoming popular. However, owing to cabin space limitations, it is difficult to mount systems such as power steering for assisting steering operations, and such systems are currently not installed in most ultra-compact mobility vehicles. Our research group focused on a steer-by-wire system that does not require a physical connection between the steering wheel and the wheels. Using this system, the steering wheel can be installed without any constraints, and the cabin layout can be easily changed. The reaction torque applied to the steering wheel can be expected to provide an optimum steering feel to each driver by controlling the reaction-force-generating actuator output. Drivers with different heights and arm lengths were then grouped, and arm model calculation and electromyogram measurements obtained during steering operations were used to examine the muscle burden experienced during driving owing to differences in the drivers’ physiques.
Highlights
Nowadays, the demand for new transportation machines for a super-aged society has increased, and the use of ultra-compact mobility is actively promoted in Japan
Calculation of the dynamics concerning the effect of reducing the upper arm burden of drivers and calculation of the dynamics concerning the effect of reducing the upper arm burden of drivers with different physiques on using an ultra-compact mobility vehicle equipped with a steer-by-wire with different physiques on using an ultra-compact mobility vehicle equipped with a steer-by-wire system
In the steering operation of the arm, it was shown that the anterior deltoid of the pushing side side arm was the most active muscle when performing the steering operation in the same seat arm was the most active muscle when performing the steering operation in the same seat position
Summary
The demand for new transportation machines for a super-aged society has increased, and the use of ultra-compact mobility is actively promoted in Japan. An ultra-compact mobility vehicle is a compact electric vehicle for one to two people. An ultra-compact mobility vehicle is smaller than a. K-car, and it has a small turning radius so that it is easy to obtain short-distance movement in crowded city centers. It meets the demands of car sharing and living traffic in mountainous areas, etc. It is considered to be a suitable vehicle for supporting the life autonomy of isolated elderly people who face restrictions when making trips out of their homes.
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