Abstract
This paper describes active suspension with active roll for four-wheel vehicle (bus) by means of an in-series pump actuator with doubled hydropneumatic springs. It also gives full control law with no sky-craping. Lateral stiffness and solid axle geometry in the mechanical model are not neglected. Responses to lateral input as well as responses to statistical unevennesses show considerable improvement of passengers comfort and safety when cornering.
Highlights
A mathematical description of a model of active roll vehicle suspension is made in steady state of the harmonic input in symbolic form
The active suspension on the rear axle consists of the sensors of the displacement wheel-body marked by fz, producing the mean value of the front and rear displacements, and of the sensor of the vertical acceleration, marked by 1/fa, and of the actuator embodied by a pump driven by an electric motor
The lateral load transfer is slightly deteriorated, but the effective values incorporating the values from the heave-pitch model are little influenced
Summary
A mathematical description of a model of active roll vehicle suspension is made in steady state of the harmonic input in symbolic form. [1, 2, 3] our project includes the static load control, and should be low-powered. This is because of the in-series character of the control, so that static displacement compensation takes no power. There is the possibility of achieving active suspension using a source of force parallel to air suspension (which includes the static load displacement control). This source of force can be implemented by a linear electric motor. The power produced by the linear motor is small in comparison with a rotational electric motor with gearing
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