Fine mechanical impedance control using low-noise Class-G power amplifiers
Fine mechanical impedance control using low-noise Class-G power amplifiers
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DOI：
10.1109/isie.2013.6563776
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发表时间：
2013-05
期刊：
影响因子：
--
通讯作者：
Y. Yokokura;K. Ohishi
中科院分区：
文献类型：
--
作者：
Y. Yokokura;K. Ohishi
利用低噪声G类功率放大器实现了机械阻抗的精细控制。在使用被归类为D类放大器的典型PWM逆变器的情况下，力和电流噪声由PWM开关操作引起。结果，所产生的机械阻抗包含噪声。为此，本研究采用G类功率放大器。G类放大器降低了力和电流噪声，从而实现了精细的阻抗控制。此外，与另一种线性放大器相比，G类功率放大器的功率效率高。通过实验和功率谱分析，验证了G类功率放大器机械阻抗控制的有效性。
A fine mechanical impedance control using low-noise Class-G power amplifiers is realized in this paper. In the case of using typical PWM inverter which is categorized as Class-D amplifier, the force and current noise is caused by the PWM switching operations. As a result, the generated mechanical impedance contains the noise. For that reason, the Class-G power amplifiers is used in this research. The force and current noise is reduced by the Class-G amplifiers so that the fine impedance control is achieved. Furthermore, the power efficiency of the Class-G power amplifier is high, compared with another kind of linear amplifiers. By the experiment and analysis of power spectral densities, the validity of the mechanical impedance control using the Class-G power amplifier is verified.