Abstract
In emergency transportation, a patient receives the lateral acceleration when an ambulance turns a corner. Such acceleration causes the feeling of discomfort or carsickness. We make the actively-controlled bed for an ambulance which reduces the patient's discomfort by rotating the bed. The bed is actuated by a DC servo motor. The desired angle of the bed is calculated in real time from the lateral acceleration of an ambulance. The purpose of this paper is to examine the effect of the rolling-typed actively-controlled bed in terms of the subjectivity of ride comfort. In experiment, the subjects evaluate a degree of the ride comfort on a scale of five for every second. Compared to the fixed bed, the ride quality improves when the bed is actively controlled.
