Temat: skyhook - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Vibration control in semi-active suspension of the experimental off-road vehicle using information about suspension deflection
Autorzy:: Kasprzyk, J.
Krauze, P.
Budzan, S.
Rzepecki, J.
Tematy:: vibration control
magnetorheological damper
linear variable differential transformer
skyhook; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/229215.pdf Link otwiera się w nowym oknie
Opis:: The efficiency of vibration control in an automotive semi-active suspension system depends on the quality of information from sensors installed in the vehicle, including information about deflection of the suspension system. The control algorithm for vibration attenuation of the body takes into account its velocity as well as the relative velocity of the suspension. In this paper it is proposed to use the Linear Variable Differential Transformer (LVDT) unit to measure the suspension deflection and then to estimate its relative velocity. This approach is compared with a typical solution implemented in such applications, where the relative velocity is calculated by processing signals acquired from accelerometers placed on the body and on the chassis. The experiments performed for an experimental All-Terrain Vehicle (ATV) confirm that using LVDT units allows for improving ride comfort by better vibration attenuation of the body.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Design solutions and active safety increasing for "VZN" shock absorbers
Autorzy:: Niculescu, A. I.
Tematy:: self-adjustable shock absorber
metering hole
skyhook
pitch
roll
anti-gyration effect
redressing effect; Pokaż więcej
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Powiązania:: https://bibliotekanauki.pl/articles/242800.pdf Link otwiera się w nowym oknie
Opis:: The paper presents the principle, some design solutions and last theoretical and by simulation results, for the suspension realized with the self-adjustable shock absorber, called shortly VZN, relative to the standard one. The self-adjustable shock absorber VZN, an intelligent shock absorber, realized without electronics or mechanisms, grant with European Patent EP1190184B and Romanian Patent 118546, is much better than standard ones because confers possibilities of stepwise adjustment of damping force as function as the instantaneous piston position. That means lower damping coefficients at the stroke beginning, for easier medium position arriving for a well adherence, damping coefficients for well correspondence between comfort and adherence, in the medium area, high damping coefficients both adjacent parts at the medium area for better adherence and well axle movement brake, and very high damping coefficients at the ends, for better body and axles protection. This concept is realized with planar or circular valves, a new patent request presenting specific solution. The cheaper and compact solution uses metering holes like damping valves, some of these being presented in the paper. The theory shows its great damping coefficient evolution with the stroke, give progressive anti-gyration effect and regressive redressing gyration effect along vehicle body transversal and longitudinal axes, increasing pitch and roll stability. Simulation tests denote high performances for VZN shock absorbers, relative to standard one, its great adaptation capacity relative to load, road condition, and efficiency, better body stability-skyhook behaviour, better protection at the stroke ends, lower RMS body acceleration, improving pitch and roll stability at and so active safety increasing. So the automotive self-adjustable shock absorber VZN, confers high performances, nearly semi-active suspensions at low costs, nearly standard shock absorbers being an important option for the future.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Comparison of vehicle suspension dynamic responses for simplified and advanced adjustable damper models with friction, hysteresis and actuation delay for different comfort-oriented control strategies
Autorzy:: Klockiewicz, Zbyszko
Ślaski, Grzegorz
Tematy:: vehicle vertical dynamics
damper model
friction
hysteresis
comfort-oriented control strategies
Skyhook
ADD
PDD; Pokaż więcej
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Powiązania:: https://bibliotekanauki.pl/articles/2204668.pdf Link otwiera się w nowym oknie
Opis:: Throughout the years, many control strategies for adjustable dampers have been proposed, designed to boost the performance characteristics of a vehicle. Comfort control strategies such as Skyhook (SH), acceleration-driven damping or power-driven damping have been tested many times using simulation models of vehicles. Those tests, however, were carried out using simplified damper models – linear or simple bilinear with symmetric characteristics. This article presents the results of examination of the influence of using more complex damper models, with friction, hysteresis and time delay of state switching implemented, on the chosen dynamic responses of a suspension system for excitations in the typical exploitation frequency range. The results of the test are compared with those found in the literature and with the results of simulations performed with a simplified version of the advanced model used. The main conclusion is that friction and hysteresis add extra force to the already existing damping force, acting like a damping increase for all analysed control strategies. The actuation delays limit the effectiveness in a sense of comfort increasing to only some frequencies. The research shows the importance of including the proposed modules in testing for both adjustable and passive dampers.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: The effectiveness of damping for SkyHook control strategy depending on how realistic damper model is
Autorzy:: Klockiewicz, Zbyszko
Ślaski, Grzegorz
Tematy:: damping control strategy
SkyHook
adjustable damping
vehicle vertical dynamics
ride comfort
damper model
friction
hysteresis
actuation delay
strategia kontroli tłumienia
tłumienie zmienne
pionowa dynamika pojazdu
komfort jazdy
model amortyzatora
tarcie
histereza
opóźnienie; Pokaż więcej
Wydawca:: Politechnika Poznańska. Instytut Mechaniki Stosowanej
Powiązania:: https://bibliotekanauki.pl/articles/58908081.pdf Link otwiera się w nowym oknie
Opis:: One of the most widely known control strategies for improving vehicle ride comfort is SkyHook, which was tested by many scientists. Those tests however were carried out mainly using simplified damper models with simple linear or two-linear, symmetric characteristics. On the base of real damper characteristics testing, the researchers in this article examined the influence of using more realistic and complicated damper models with friction, hysteresis and time-delay of state-switching implemented, on the effectiveness of control goals. They were measured by chosen dynamic responses of a suspension system for excitations in the typical exploitation frequency range. The results from the experiments were compared with those found in literature and with the simplified version of a damper model, without hysteresis, friction or actuation delay.
Dostawca treści:: Biblioteka Nauki

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