Sökning: "active passive"
Visar resultat 21 - 25 av 444 avhandlingar innehållade orden active passive.
21. Active Junction Control and Piezoelectric Hybrid Damping for Improving the Acoustic Performance of Lightweight Structures
Sammanfattning : Weight reduction is a key factor in lowering the fuel consumption and thereby the greenhouse emissions from vehicles. However, reducing the weight normally results in a deterioration of the acoustic performance. Thus, the purpose of this thesis is to investigate damping treatments for lightweight vehicle panels. LÄS MER
22. Active and passive seismic methods for investigating the glacially-triggered Burträsk fault
Sammanfattning : Glacially-triggered faults are of high scientific interest since their formation was likely accompanied by major earthquakes and they are still a centre of seismicity in northern Fennoscandia, today. Imaging their deeper structure mainly relies on reflection seismics since the method generally has the best resolving power at depth of all geophysical methods. LÄS MER
23. Towards Active Car Body Suspension in Railway Vehicles
Sammanfattning : Today, most railway suspension systems are passive. The most wide-spread exception isactive car body tilt systems, which are mounted in some high-speed trains. Replacingsome of the passive suspension components with active could reduce the weight and costof the vehicle. LÄS MER
24. Reverberation Chamber Characterizations for Passive and Active OTA Measurements
Sammanfattning : Reverberation chamber (RC) has drawn more and more attention as a multipath emulator over the past decade. It has been used for antenna efficiency measurements. It has also been used to measure diversity gain and multi-input multi-output (MIMO) capacity using multi-port antenna. LÄS MER
25. On passive and active control of machining system dynamics : analysis and implementation
Sammanfattning : .... LÄS MER