Abstract
Starting from the case of the electric wheelchair driving on bumpy roads, the mathematical model of the electric wheelchair in this driving state is established, and the vibration generated when the wheel contacts the ground is used as the external excitation to study the linear and nonlinear driving of the electric wheelchair. The relationship between the driving speed and the acceleration of gravity, the longitudinal displacement and the amplitude of the road in this state was analyzed, and the dynamic characteristics of the electric wheelchair in the process of driving on the bumpy road were analyzed. The study found that the vibration frequency and amplitude of electric wheelchair increase with the increase of the driving speed when driving on bumpy roads. Taking the driving speed of 3.3ms-1 and 3.7ms-1 as examples, it shows that the electric wheelchair drives on the bumpy road. The nonlinear vibration that occurs on the wheelchair is highly sensitive to parameters (driving speed), and changes in the driving speed can cause discontinuous vibration responses, leading to the tipping of the electric wheelchair.
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