The axial flow fan is a kind of turbomachinery equipment to provide compressed gas and the statorblade adjusting mechanism is the key to the whole system. Taking the stator blade adjustment electro-hydraulicservo syst...The axial flow fan is a kind of turbomachinery equipment to provide compressed gas and the statorblade adjusting mechanism is the key to the whole system. Taking the stator blade adjustment electro-hydraulicservo system as the research object, the traditional hydraulic servo system is vulnerable to oil pollution, high fail-ure rate and low energy conversion efficiency. To solve the above-mentioned problems, the Direct drive volumecontrol hydraulic system for stator blade adjustment is designed, the hydraulic power source of the system is com-posed of servo motor and bidirectional quantitative pump. The working principle of this system is analyzed, thesimulation model of hydraulic system is built and solved. The results show that the new system has higher energyefficiency, the structure is more compact, the machine power is smaller and the control is more automatic and in-telligent as compared to the traditional one.展开更多
With the ongoing advancements in sensor networks and data acquisition technologies across various systems like manufacturing,aviation,and healthcare,the data driven vibration control(DDVC)has attracted broad interests...With the ongoing advancements in sensor networks and data acquisition technologies across various systems like manufacturing,aviation,and healthcare,the data driven vibration control(DDVC)has attracted broad interests from both the industrial and academic communities.Input shaping(IS),as a simple and effective feedforward method,is greatly demanded in DDVC methods.It convolves the desired input command with impulse sequence without requiring parametric dynamics and the closed-loop system structure,thereby suppressing the residual vibration separately.Based on a thorough investigation into the state-of-the-art DDVC methods,this survey has made the following efforts:1)Introducing the IS theory and typical input shapers;2)Categorizing recent progress of DDVC methods;3)Summarizing commonly adopted metrics for DDVC;and 4)Discussing the engineering applications and future trends of DDVC.By doing so,this study provides a systematic and comprehensive overview of existing DDVC methods from designing to optimizing perspectives,aiming at promoting future research regarding this emerging and vital issue.展开更多
基金supported by National Natural Science Foundation of China,Project No. 51175148
文摘The axial flow fan is a kind of turbomachinery equipment to provide compressed gas and the statorblade adjusting mechanism is the key to the whole system. Taking the stator blade adjustment electro-hydraulicservo system as the research object, the traditional hydraulic servo system is vulnerable to oil pollution, high fail-ure rate and low energy conversion efficiency. To solve the above-mentioned problems, the Direct drive volumecontrol hydraulic system for stator blade adjustment is designed, the hydraulic power source of the system is com-posed of servo motor and bidirectional quantitative pump. The working principle of this system is analyzed, thesimulation model of hydraulic system is built and solved. The results show that the new system has higher energyefficiency, the structure is more compact, the machine power is smaller and the control is more automatic and in-telligent as compared to the traditional one.
基金supported by the National Natural Science Foundation of China (62272078)。
文摘With the ongoing advancements in sensor networks and data acquisition technologies across various systems like manufacturing,aviation,and healthcare,the data driven vibration control(DDVC)has attracted broad interests from both the industrial and academic communities.Input shaping(IS),as a simple and effective feedforward method,is greatly demanded in DDVC methods.It convolves the desired input command with impulse sequence without requiring parametric dynamics and the closed-loop system structure,thereby suppressing the residual vibration separately.Based on a thorough investigation into the state-of-the-art DDVC methods,this survey has made the following efforts:1)Introducing the IS theory and typical input shapers;2)Categorizing recent progress of DDVC methods;3)Summarizing commonly adopted metrics for DDVC;and 4)Discussing the engineering applications and future trends of DDVC.By doing so,this study provides a systematic and comprehensive overview of existing DDVC methods from designing to optimizing perspectives,aiming at promoting future research regarding this emerging and vital issue.
