Abstract
Not only the driving and operating speed of agricultural tractors but also the ratio of transport is increasing constantly. Because of that, higher driving safety and improved driving comfort are required. To achieve this, the tractor chassis suspension has to be adapted. Based on a tractor with conventional rigid axles, a new hydro-pneumatic chassis suspension for front and rear axle, including a set of sensors, hydraulic actuators and an electronic real-time controller, was developed. The used semi-active control algorithm of the damping ratio is based on the continuous Skyhook theory. Consequently, the chassis suspension can be adjusted to any kind of road and speed to achieve an improved driveability.
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