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2012
Conference Paper
Titel
Development and in-vehicle test of a novel active engine mount
Abstract
The paper presents the development and performance testing of an engine mount featuring a stroke-amplified piezo stack actuator that is decoupled from the quasi-static loads. The actuator introduces its counteracting force through a coupling element whose dynamic stiffness increases with increasing frequency, acting as a high-pass filter. An elastic coupling element arranged in parallel with the actuator carries the static and quasi-static loads. This arrangement reduces the load requirements for the actuator. Because the engine induces multi-order narrowband distortions, the controller uses the narrowband feedforward strategy (Filtered-X LMS) to compensate forced and resonant distortions, minimizing the acceleration of the base structure. For the performance tests the active engine mount is installed in a test vehicle mounted on an full-vehicle test bench.