Zhigang Yang

Publications (8)0 Total impact

• Article: Power performance of circular piezoelectric diaphragm generators

  Kehong Tang, Junwu Kan, Taijiang Peng, Zhigang Yang, Guangming Cheng
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  ABSTRACT: Energy generation performance of a piezoelectric generator depends mainly on several elements such as the structural style, boundary conditions, geometry parameters, materials, vibration-source frequency, and external load. To obtain the optimal energy-harvesting device, the Raleigh method is used to establish the analysis model of circular piezoelectric composite diaphragms. Simply supported and clamped boundary conditions were considered. The relationships between the output power and the structural parameters of piezoelectric composite diaphragms, and the external load resistance and frequency were shown. Given the correlative material parameters and boundary conditions, the output power, using structural parameters, external load, or vibrating frequency as variables, can be calculated. Simulation results show that there are optimal structural parameters and load for a composite diaphragm to achieve the maximum output power. A piezoelectric diaphragm generator with given dimensions tends to achieve higher output power under clamped boundary conditions than that under simply supported boundary conditions.
  Frontiers of Mechanical Engineering in China 04/2012; 3(4):434-440.
• Article: Impact drive rotary precision actuator with piezoelectric bimorphs

  Hongzhuang Zhang, Ping Zeng, Shunming Hua, Guangming Cheng, Zhigang Yang
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  ABSTRACT: An impact drive rotary precision actuator with end-loaded piezoelectric cantilever bimorphs is proposed. According to finite element analysis and experiments of the dynamic characteristics of end-loaded piezoelectric cantilever bimorphs, a specific fixed-frequency and adjustable-amplitude is confirmed to control the actuator. The results show that an actuator excited by fixed-frequency and the adjustable-amplitude ramp voltage waveform works with a large travel range (180°), high resolution (1 μrad), speed (0.2 rad/min) and heavy-load ability (0.02 Nm). With advantages of high-precision positioning ability, simple structure and only one percent the cost of traditional impact drive mechanisms, the actuator is expected to be widely used in precision industries.
  Frontiers of Mechanical Engineering in China 04/2012; 3(1):71-75.
• Article: Performance investigation on ultrasonic levitation axial bearing for flywheel storage system

  Taijiang Peng, Zhigang Yang, Junwu Kan, Fengjun Tian, Xiaohong Che
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  ABSTRACT: The bearing is an important basic mechanical part for supporting a shaft. A flywheel storage system needs a type of noncontact support bearing to enhance the speed of the axis. A magnetic suspension bearing is one type of noncontact bearing but has electromagnetic interference to other electric equipment. Based on the performance research of ultrasonic levitation technology, a novel noncontact bearing called ultrasonic bearing is presented, which consists of a special piezoelectric vibrator supporting the load. Experiments are carried out to study the relationships among the amplitude of the vibrator and levitation clearance, the highest speed of the axis, and the frictional moment of the axis. Results show that the levitation clearance becomes smaller gradually with increasing load; the rotation speed is up to 8946 r/min, and the friction moment is only 2.095×10−5 N · m when the levitation clearance is 8.53 μm. The ultrasonic bearing is highlighted because of its simple structure, strong levitation ability, and low friction moment.
  Frontiers of Mechanical Engineering in China 04/2012; 4(4):415-419.
• Article: Novel precision piezoelectric step rotary actuator

  Jianfang Liu, Zhigang Yang, Hongwei Zhao, Guangming Cheng
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  ABSTRACT: A novel piezoelectric (PZT) precision step rotary actuator was developed on the basis of PZT technology. It adopts the principle of bionics and works with an inside anchoring/loosening of the stator and a distortion structure of the uniformly distributed thin flexible hinge to solve problems such as ineffective anchoring/loosening, low step rotary frequency, small travel, poor resolution, low speed and unsteady output. The developed actuator is characterized by high frequency (30 Hz), high speed (380 μrad/s), large travel (>270°), high resolution (1 μrad/step), and work stability. It greatly improves the ability to drive the existing PZT step rotary actuator. The new actuator can be applied in the field of micromanipulation and precision engineering, including precision driving and positioning and optics engineering.
  Frontiers of Mechanical Engineering in China 06/2007; 2(3):356-360.
• Article: [Analysis and test of piezoelectric micropump for drug delivery].

  Junwu Kan, Ming Xuan, Zhigang Yang, Yihui Wu, Boda Wu, Guangming Cheng
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  ABSTRACT: With a microsystem or micropump, the release rate of drug delivery is able to be controlled easily to maintain the therapeutic efficacy. A piezoelectric membrane-valve micropump for implantable and carryhome drug delivery system is developed and tested. The influence elements of dynamic performance of the PZT actuator and valve were analyzed, and the calculation method of resonant frequency of the membrane valve was provided. Study results showed that the output performance of the micropump depended on the coupling effect of the actuator and valve. For a given actuator, the output value and the optimal frequency of a micropump could be enhanced only by valve design. Two micropumps with different valve dimensions were fabricated for comparing examination. The smaller -valve micropump obtained higher output values (the maximum flow rate and backpressure being 3.5 ml/min and 27 KPa, respectively) and two optimal frequencies (800 Hz and 3 000 Hz). The larger -valve micropump achieved lower output values (the maximum flow rate and backpressure being 3.0 ml/min and 9 KPa, respectively) and one optimal frequency (about 200 Hz). The test results suggest that the output values and optimal frequency of micropump can be improved by changing the valve dimension, and the viewpoint that checkvalve micropump works only with low acting frequency is wrong.
  Sheng wu yi xue gong cheng xue za zhi = Journal of biomedical engineering = Shengwu yixue gongchengxue zazhi 09/2005; 22(4):809-13.
• Conference Proceeding: Control of a New Type of Direct Drive Piezoelectric Servo Valve

  Miaolei Zhou, Yantao Tian, Zhigang Yang, Guangming Cheng, Shiju E
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  ABSTRACT: A new type of two-stage direct drive piezoelectric servo valve is designed and its control system is presented in this paper. The multilayer piezoelectric actuator is used as the electricity-machine converter in this new servo valve, which gives the electrohydraulic servo system higher precision and an extensive application field. The bidirectional piecewise gearshift integral PID control method proposed in this paper can solve the nonlinear problem of the servo valve and satisfy the demand of the control system. Experiment results have confirmed the effectiveness of the proposed method
  Robotics and Biomimetics, 2004. ROBIO 2004. IEEE International Conference on; 09/2004
• Article: [Pumping performance of a new piezoelectric pump for drug delivery].

  Junwu Kan, Zhigang Yang, Kehong Tang, Guangming Cheng
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  ABSTRACT: A novel double-chamber series piezoelectric pump has been presented and tested. The pump is a multi-layer circular planar structure, consisting of PMMA (polymethyl methacrylate) pump body, two PZT actuator membranes and three cantilever valves. The PZT actuators are driven at a phase difference of 180 degrees, which is equal to two one-chamber pumps running in series. The output performance depends on the geometrical parameters of the actuator membrane. The prototype pump, fabricated with the PZT membrane 0.18 mm in thickness and 50 mm in diameter of 50 mm, can deliver drug in either direct way (pumping liquid drug) or indirect way (pumping air to extrude liquid drug from a sealed container). The frequency-response characteristic of the two handling methods is of difference. The pump obtains optimum performance at low frequency for liquid as medium, and at high frequency for air as medium. For both the direct delivery and indirect delivery, the maximum flowrate achieved reached up to 220 ml/min and 35 ml/min, respectively; and the maximum backpressure obtained amounted to about 14 KPa and 21 KPa, respectively, at the applied voltage of 80 V with frequency of 20 Hz.
  Sheng wu yi xue gong cheng xue za zhi = Journal of biomedical engineering = Shengwu yixue gongchengxue zazhi 05/2004; 21(2):297-301.
• Conference Proceeding: Design of single stator multi-freedom piezoelectric motor device

  Xianwei Wu, Guangming Cheng, D.J. Jackson, Zhigang Yang, Boda Wu, Liping Wu, Yinzhu Wu
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  ABSTRACT: In this paper, brings forward a new kind of piezoelectric motor device, which can perform 6 directions linear movement in a smooth plate. The motor device is driven by a single frequency electric signal, and the moving direction of the motor device can be controlled by just changing the input electrical signal. The paper first describes the principle of driving the motor. It then describes how to design the motor device that can provide the power. Finally, based on the experiments, it proves that this kind of motor device could accomplish the desired movements
  System Theory, 2001. Proceedings of the 33rd Southeastern Symposium on; 04/2001