A moment actuator with direct detection of forces is described.Moment frequency re- sponse and moment excitation purity asperformance criteria are proposed. Methods for the perfor- mancecalibration of the actuator are...A moment actuator with direct detection of forces is described.Moment frequency re- sponse and moment excitation purity asperformance criteria are proposed. Methods for the perfor- mancecalibration of the actuator are presented. Assessment is carried outby means of the reciprocity principle.展开更多
It is increasingly recognized that machines and other vibrational sources can impart structure-borne sound power into supporting and connected structures through rotational components of excitation as well as translat...It is increasingly recognized that machines and other vibrational sources can impart structure-borne sound power into supporting and connected structures through rotational components of excitation as well as translational components. It is well known that the rotational components are difficult to cstimate since moments are not easy to generate and measure. In this paper a prototype moment actuator is discussed. It consists of two parallel rods of giant magnctostrictive matcrial. The performance of the actuator has been investigated by means of a transfer function involving magnitude and phase. A quantity, 'purity of moment excitation', has been proposed to estimate the ability of the actuator to impart moments.展开更多
A mechanic-electric analogous method on rotational degree of freedom is used to establish the analogous circuit for moment actuator and its calibration system. The correctness for the analogous circuit is proved by so...A mechanic-electric analogous method on rotational degree of freedom is used to establish the analogous circuit for moment actuator and its calibration system. The correctness for the analogous circuit is proved by some experiments. The result in this paper provides an useful basis for the optimization of the design of the moment actuator.展开更多
The method of the moment excitation in the studies of the structure-borne sound using a moment actuator is introduced. Some design considerations for the moment actuator are presented. A standard mechanical system is ...The method of the moment excitation in the studies of the structure-borne sound using a moment actuator is introduced. Some design considerations for the moment actuator are presented. A standard mechanical system is established to calibrate the performance of the moment actuator. The frequency and mechanical power performances of the actuator are discussed.展开更多
基金the Natural Science Foundation of Guangdong Pronvince of China under Grant 960736
文摘A moment actuator with direct detection of forces is described.Moment frequency re- sponse and moment excitation purity asperformance criteria are proposed. Methods for the perfor- mancecalibration of the actuator are presented. Assessment is carried outby means of the reciprocity principle.
文摘It is increasingly recognized that machines and other vibrational sources can impart structure-borne sound power into supporting and connected structures through rotational components of excitation as well as translational components. It is well known that the rotational components are difficult to cstimate since moments are not easy to generate and measure. In this paper a prototype moment actuator is discussed. It consists of two parallel rods of giant magnctostrictive matcrial. The performance of the actuator has been investigated by means of a transfer function involving magnitude and phase. A quantity, 'purity of moment excitation', has been proposed to estimate the ability of the actuator to impart moments.
文摘A mechanic-electric analogous method on rotational degree of freedom is used to establish the analogous circuit for moment actuator and its calibration system. The correctness for the analogous circuit is proved by some experiments. The result in this paper provides an useful basis for the optimization of the design of the moment actuator.
文摘The method of the moment excitation in the studies of the structure-borne sound using a moment actuator is introduced. Some design considerations for the moment actuator are presented. A standard mechanical system is established to calibrate the performance of the moment actuator. The frequency and mechanical power performances of the actuator are discussed.
