The Experts below are selected from a list of 324 Experts worldwide ranked by ideXlab platform
Liu Junbiao - One of the best experts on this subject based on the ideXlab platform.
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Vibration Control of Impact Drive Mechanism
Piezoelectrics and Acoustooptics, 2010Co-Authors: Liu JunbiaoAbstract:To investigate and control the vibration in impact Drive Mechanism(IDM),the expression formula for its natural frequency was derivate.The reason resulting into vibration was analyzed.According to natural frequency,a first-order active low-pass filter was designed as vibration isolator.Experiments were made based on a symmetric impact Drive Mechanism.The research results revealed that the high harmonic which was equal to the natural frequency in sawtooth wave was an important factor causing instability of this piezo motor.The low-pass filter was an effective tool to eliminate the harmful harmonic.Then,the velocity was increasing linearly with the driving frequency.But the velocity was lowered a little due to the decrease of the signal's impact.
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Operating characteristic of rotary piezo impact Drive Mechanism
Optics and Precision Engineering, 2009Co-Authors: Liu JunbiaoAbstract:A rotary piezo motor with adjustable preload function is designed to study the rotational motion of an Impact Drive Mechanism(IDM).The motion principles of this Rotary Impact Drive Mechanism(RIDM) are investigated,the influencing factors of driving signal,structural parameters as well as piezoelectric element on motion characteristics of the Mechanism are analyzed.The research results reveal that the rotational velocity of this motor is in proportion to the frequency or the voltage of driving signal,and in inverse proportion to M/m(the ratio of the main body and the weight).The velocity decreases as the charge time increasing of piezo element.Furthermore,the results also show that the torque-speed property and forward-backward rotation of rotary motor are both different from that of traditional motor.The torquespeed curve of the rotary motor is a fold line,and the forward rotational velocity is larger than the backward rotation velocity all the time.When the frequency,voltage and the charge time are 1100 Hz,50 V and 70 μs,respectively,and M/m is equal to 8.9,rotational velocity is about 1.75°/s and the maximum torque is 0.13 N·m.These results reported here show that the rotary impact Drive Mechanism is a multivariable system,whose performance is decided by many factors.
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Modeling and Simulation of Piezo Impact Drive Mechanism
Computer Simulation, 2009Co-Authors: Liu JunbiaoAbstract:A model of impact Drive Mechanism (IDM) was built,in which the friction nonlinearity was considered.The simulation model was developed by utilizing MATLAB /Simulink.A group of curves were obtained based on the model,including the relationship of displacement and time,the relationship of average velocity and voltage and the relationship of average velocity and frequency.An experiment was made to verify the simulation results.The experimental results show that the velocity of impact Drive Mechanism increases linearly as the voltage or the frequency is increased basically.The simulation results are more coincident with the fact than the theoretical values.The model can be used to predict the motion performance of the IDM.
Battal Dogan - One of the best experts on this subject based on the ideXlab platform.
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A review development of rhombic Drive Mechanism used in the Stirling engines
Renewable and Sustainable Energy Reviews, 2017Co-Authors: Derviş Erol, Hayri Yaman, Battal DoganAbstract:Abstract Stirling engines, unlike internal combustion engines, are engines that generate power by using any type of heat energy source. In these engines, air, helium, and hydrogen are generally preferred as the working fluid. In terms of environment, Stirling engines have lower NO x, HC, and CO emission. The Drive Mechanisms vary according to the type of the engine. Suitable Drive Mechanisms need to be designed to obtain high power output from the engine. This study chronologically examines the efforts of development in Stirling engines. Stirling, Ericsson, and Carnot theoretical cycles are compared and their theoretical efficiency is show to be equal. It is shown that the thermodynamic properties of working fluids used in Stirling engines change according to the temperature. The effect of the working fluids on the engine's performance is discussed. The Drive Mechanisms used in Stirling engine throughout the historical development is studied in details. Theoretical and experimental studies performed on rhombic Drive Mechanisms that are distinguished among the Drive Mechanisms used in such engines by their advantages are examined. The rhombic Drive Mechanism is firstly used in Stirling engines by the Philips Company in 1953. After this date, the applications of the rhombic Drive Mechanism in various engines with different characteristics were assessed in terms of performance by companies and researchers. The comparison with other Drive Mechanisms shows that rhombic Drive Mechanism is the most suited Drive Mechanism for beta-type Stirling engines.
Mohamed El Hannaoui - One of the best experts on this subject based on the ideXlab platform.
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Study of a low-temperature Stirling engine Driven by a rhombic Drive Mechanism
International Journal of Energy and Environmental Engineering, 2013Co-Authors: Hind El Hassani, Nour-eddine Boutammachte, Juergen Knorr, Mohamed El HannaouiAbstract:In this paper, a parametric study of the rhombic Drive Mechanism of a solar low-temperature Stirling engine was conducted. The goal is to find out the relationship between the rhombic Drive Mechanism parameters and the performance of a low-temperature differential Stirling engine. The results indicate that the offset distance from the gear center and gear radius of the rhombic Drive Mechanism have to be maximized, in order to increase the indicated power, while other rhombic Drive parameters should be reduced for the same reason. Another result is that for realizing the optimized phase angle for beta-type Stirling engines, one should act on working piston-related bars and rhombic Drive gear radius.
Mingming Zhang - One of the best experts on this subject based on the ideXlab platform.
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Waveform optimization of a two-axis smooth impact Drive Mechanism actuator:
Journal of Intelligent Material Systems and Structures, 2020Co-Authors: Jianxiang Wang, Yuxi Chen, Yuxin Peng, Xian Song, Yangkun Zhang, Mingming ZhangAbstract:This paper presents a data-Driven method for waveform optimization of a two-axis smooth impact Drive Mechanism (SIDM) actuator. The actuator was constructed by two piezoelectric elements (PZTs) per...
Derviş Erol - One of the best experts on this subject based on the ideXlab platform.
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A review development of rhombic Drive Mechanism used in the Stirling engines
Renewable and Sustainable Energy Reviews, 2017Co-Authors: Derviş Erol, Hayri Yaman, Battal DoganAbstract:Abstract Stirling engines, unlike internal combustion engines, are engines that generate power by using any type of heat energy source. In these engines, air, helium, and hydrogen are generally preferred as the working fluid. In terms of environment, Stirling engines have lower NO x, HC, and CO emission. The Drive Mechanisms vary according to the type of the engine. Suitable Drive Mechanisms need to be designed to obtain high power output from the engine. This study chronologically examines the efforts of development in Stirling engines. Stirling, Ericsson, and Carnot theoretical cycles are compared and their theoretical efficiency is show to be equal. It is shown that the thermodynamic properties of working fluids used in Stirling engines change according to the temperature. The effect of the working fluids on the engine's performance is discussed. The Drive Mechanisms used in Stirling engine throughout the historical development is studied in details. Theoretical and experimental studies performed on rhombic Drive Mechanisms that are distinguished among the Drive Mechanisms used in such engines by their advantages are examined. The rhombic Drive Mechanism is firstly used in Stirling engines by the Philips Company in 1953. After this date, the applications of the rhombic Drive Mechanism in various engines with different characteristics were assessed in terms of performance by companies and researchers. The comparison with other Drive Mechanisms shows that rhombic Drive Mechanism is the most suited Drive Mechanism for beta-type Stirling engines.
