Theoretical and experimental investigations of vibration waveforms excited by an electro-hydraulic type exciter for fatigue with a two-dimensional rotary valve

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• 作者：Yan Ren^a ; ¹ ; ^{rentingting211@wzu.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Jian Ruan^b ; ^{yanyan333@126.com" class="auth_mail" title="E-mail the corresponding author}Author Vitae
• 关键词：Rotary valve ; Electro-hydraulic excitation waveform ; High frequency ; Harmonics ; Analytical solution ; Hydraulic resonance
• 刊名：Mechatronics
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：33
• 期：Complete
• 页码：161-172
• 全文大小：1760 K

文摘

Conventional electro-hydraulic excitation is usually controlled by a servo valve employing a sliding spool type construction. However, the comparatively slow response of the servo valve will greatly limit the system's high-frequency performance. Therefore, a rotary valve with the rotary motion of the spool as a new excitation mechanism is proposed to obtain the desired excitation, especially a high-frequency excitation wave for fatigue. An electro-hydraulic exciter using a combination of a three-way two-dimensional rotary valve (2D rotary valve) and an unequal area piston is taken as an example. Analysis of the vibration output to a typical wave input yields an analytic solution of the vibration waveform excited by this electro-hydraulic system. The mathematical formulation of the harmonics is also derived. Additionally, an electro-hydraulic excitation test-bed is built to acquire an experimental excitation wave. Consequently, the analysis of the excitation waveform in an approximate analytical and experimental method is used to verify access to high-frequency excitation, even resonance excitation.