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| 1 | Optimal Design of Stewart Platform Safety Mechanism显示文摘能够在它的整个连接长度的范围以内随意移动的安全机制基于连接空间被设计。十六个极端姿势在一个斯图尔特平台被获得。极端姿势的单个点被使用 homotopy 方法以及单个点的判断条件解决,并且从而,最大的连接长度被完成。在二个附近的连接之间的关节和距离的旋转角度在机制在极端姿势之中移动,这在被假定的一个计算例子被分析。然后,测试安全机制的一个算法被介绍考虑限制条件。有全球运动的最佳的性质的安全机制被通过最小化极端姿势的平均条件数字优化所有结构的参数得出。 | Chen Hua Chen Weishan Liu Junkao | 2007 | Chinese Journal of Aeronautics2007，20，4： | 7 |
| 2 | Acylindrical standing wave ultrasonic motor using bendingvibration transducer显示文摘 | Liu Yingxiang Chen Weishan Liu Junkao | 2011 | Ultrasonics2011，51，5： | 1 |
| 3 | Acylindrical traveling wave ultrasonic motor usinglongitudinal and bending composite transducer显示文摘 | Yingxiang Liu Weishan Chen Junkao Liu | 2010 | Sensorsand Actuators A2010，，161： | 1 |
| 4 | Bidirectional Linear Ultrasonic Motor Using Longitudinal Vibrating Transducers显示文摘 | Zhang Fan Chen Weishan Liu Junkao | 2005 | IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control2005，52，1： | 1 |
| 5 | A cylindrical traveling wave ultrasonic motor using longitudinal and bending composite transducer 显示文摘 | LIU Yingxiang CHEN Weishan LIU Junkao | 2010 | Sensors and Actuators: A Physical2010，161，12： | 1 |
| 6 | A rotary ultrasonic motor using bending vibration trans- ducers显示文摘 | LIU Yingxiang CHEN Weishan LIU Junkao | 2010 | IEEE Transactions on Ultrasonics Ferroe- lectrics and Frequency Control2010，57，10： | 1 |
| 7 | A cylindrical traveling wave ultrasonic motor using longi- tudinal and bending composite transducer显示文摘 | LIU Yingxiang CHEN Weishan LIU Junkao | 2010 | Sensors and Actuators: A Physical2010，161，12： | 1 |
| 8 | Ahigh-power linear ultrasonic motor using longitudinalvibration transducers with single foot显示文摘 | Yingxiang Liu Weishan Chen Junkao Liu | 2010 | IEEETransactions on Ultrasonics Ferroelectrics andFrequency Control2010，57，8： | 1 |
| 9 | Arotary ultrasonic motor using bending vibrationtransducers显示文摘 | Yingxiang Liu Weishan Chen Junkao Liu | 2010 | IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control2010，57，10： | 1 |
| 10 | Acylindrical standing wave ultrasonic motor usingbending vibration transducer显示文摘 | Yingxiang Liu Weishan Chen Junkao Liu | 2011 | Ultrasonics2011，51，5： | 1 |
| 11 | Alinear ultrasonic motor using bending vibrationtransducer with double driving feet显示文摘 | Weishan Chen Yingxiang Liu Junkao Liu | 2010 | Ferroelectrics2010，400，： | 1 |
| 12 | DIRECT DISPLACEMENT OF PARALLEL MECHANISM WITH WAVELET NETWORK显示文摘A new method solution for the direct displacement of parallel mechanism,wavelet network method,is proposed. Comparing with the classical analytical and numerical methods,this method can be extended to any parallel mechanism with any selected degree of freedom and configuration. A wavelet network suiting to approach multi-input and multi-output system is constructed. The network is optimized by analyzing the sparseness of input data and selecting the fitting wavelets by orthogo-nalization method according to the output data. Then it is applied to solve the direct displacement of a general six-degree-of-freedom parallel mechanism as a numerical example. For comparison purposes,a BP neural network is also used for this problem. Simulation results show that the wavelet network performs better than BP neural network. In addition,the wavelet network learns much faster than BP network. | CHEN Weishan CHEN Hua LIU Junkao | 2007 | Chinese Journal of Mechanical Engineering2007，20，2： | 1 |
| 13 | A rectangle-type linear ultrasonic motor using longitudinal vibration transducers with four driving feet显示文摘 | Liu Yingxiang Chert Weishan Liu Junkao | 2013 | IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control2013，60，4： | 1 |
| 14 | Modeling and experiments of a nano-positioning and high frequency scanning piezoelectric platform based on function module actuator显示文摘A piezoelectric platform using function module actuator is presented to achieve nano-positioning and high frequency scanning in large working range. A function module actuator is designed to produce a pair of orthogonal bending deformations and a longitudinal deformation through partition exciting. The bending deformations are used to actuate the planar motion,while the longitudinal deformation is utilized to dynamically adjust the driving force and broaden the scanning frequency. The dynamic model of the platform system is developed. The open-loop performances of a prototype are first tested: a scan frequency of 308 Hz in a scanning range of 3.368 μm×3.396 μm is measured in direct actuation mode,and the displacement resolution is measured to be 16 nm;maximum speed is measured to be 3.38 mm s^-1 in the inertial actuation mode. Furthermore,the closedloop experiments are carried out and a switching strategy is proposed to obtain the switching of the inertial and direct actuation modes automatically;the platform achieves the scanning with frequency of 300 Hz at the set position. | DENG Jie LIU YingXiang ZHANG ShiJing LIU JunKao | 2020 | Science China(Technological Sciences)2020，63，12： | 1 |
| 15 | A high-power linear ultrasonic motor using longitudinal vibration transducers with single foot显示文摘 | LIU Yingxiang CHEN Weishan LIU Junkao | 2010 | IEEE Transactions on Ultrasonics Ferroelec- tries and Frequency Control2010，57，8： | 1 |
| 16 | A U-shapedlinear ultrasonic motor using longitudinal vibration transdueem with double feet 显示文摘 | LIU Yingxiang LIU Junkao CHEN Weishan | 2012 | IEEE Transactions on Ultrasonics Ferroelec- tries and Frequency Control2012，59，5： | 1 |
| 17 | A novel sensitive piezoelectric mass balance used for weightless environment显示文摘A novel sensitive piezoelectric mass balance(PEMB)was developed for using in weightless environment.The mass of the measured object was obtained by detecting the resonant frequency shift of the PEMB.This weighing method was illustrated systematically.In order to build the relationship between the resonant frequency shift and the measured mass,the equivalent stiffness coefficient and the equivalent concentrated mass of the PEMB were analyzed theoretically.The influence of the structural and material parameters on the sensitivity was analyzed,which provided the design reference to improve the sensitivity.The finite-element-method(FEM)static analysis of the PEMB was carried out with ANSYS software to investigate its shock resistance.Furthermore,the vibration test and calibration experiment effectively verified the theoretical analyses results.The developed PEMB holds merits of independence on acceleration field,independence on properties of the measured object and with shock resistance.Consequently,it can be a suitable candidate for measuring mass of solid samples with unknown properties in the weightless environment. | ZHANG ShiJing LIU YingXiang DENG Jie LIU JunKao | 2021 | Science China(Technological Sciences)2021，64，4： | 0 |
| 18 | A method to change frictional characteristics based on ultrasonic micro driving technique显示文摘以便减少磨擦力量并且在低速度消除一个技工系统的粘住滑倒现象,一个方法基于超声的微开车技术被建议改变摩擦特征。顺时针方向激动并且在超声的致动器的二个纵的夹钳门栓的震荡器上驾驶点的逆时针方向的显微镜的椭圆的运动将产生超声的润滑油行动;而且,磨擦能被调整震荡器的颤动的振幅活跃地控制。为磨擦控制的试验性的安装用航空的指南,力量传感器和一低速度时刻被设计 motor.Fuzzy 控制理论被使用进这个系统。实验显示磨擦力量大部分被减少了,试验性的系统的运动是稳定的。当超声的致动器和负担 is3.8 kg 和马达的全部的团正在开车时,磨擦系数仅仅是大约 0.0053 速度是 0.5 mm/s。 | CHEN Weishan ZHANG Fan LIU Junkao | 2006 | Chinese Journal of Acoustics2006，25，2： | 0 |
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