초록 ▼

An active suspension system for a work vehicle includes an active vibration isolator mounted between the chassis and the cab which controls movement of the cab relative to the chassis in response to a control signal depending on a detected condition (e.g., bumpiness) of a surface ahead of the vehicl

An active suspension system for a work vehicle includes an active vibration isolator mounted between the chassis and the cab which controls movement of the cab relative to the chassis in response to a control signal depending on a detected condition (e.g., bumpiness) of a surface ahead of the vehicle. The method of controlling the system includes detecting the bumpiness of the surface on which the vehicle travels, adjusting a performance parameter in response to the detected bumpiness, generating the control signal in response to the detected bumpiness, and applying the control signal to the isolator. Apparatus for such an active suspension system is also disclosed. Bumpiness can be estimated or monitored using vehicle speed, past performance, geo-referenced maps and forward-looking sensors. The adjustable performance parameters include gain and frequency response. The system allows an operator to manually adjust the gain and, thus, the frequency response.

대표청구항 ▼

[ What is claimed is:] [21.] In a work vehicle including a chassis, a propulsion system coupled to the chassis to propel the work vehicle along a surface in a forward direction, an operator's cab supported by the chassis, and an active suspension system including at least one active vibration isolat

[ What is claimed is:] [21.] In a work vehicle including a chassis, a propulsion system coupled to the chassis to propel the work vehicle along a surface in a forward direction, an operator's cab supported by the chassis, and an active suspension system including at least one active vibration isolator coupled between the chassis and the cab to control movement of the cab relative to the chassis in response to a control signal, a method of controlling the active suspension system comprising the steps of:actuating an operator-actuatable input device configured to generate an input signal;adjusting the frequency response of the active suspension system in response to the input signal;generating the control signal to attenuate transmission of force between the cab and the chassis, the control signal depending at least upon the adjusted frequency response of the suspension system; andapplying the control signal to the suspension system, whereby the frequency response of the suspension system depends on the actuation of the input device.