Vibration control and electricity generating device using a number of hula-hoops and generators

This paper deals with the vibration control device which simultaneously generates electricity by using absorbed vibration energy. This device consists of a hula-hoop and a generator. In this paper, we researched the case of using a number of devices. As the result of the experiment and the numerical calculation, the following points were made clear: (1) When two devices are used, the component of the centrifugal forces which are perpendicular to the direction of the external force are cancelled by rotating two hula-hoops in opposite directions. Moreover, the optimum quenching according to the amplitude of the external force is possible by varying the number of rotating hula-hoops. (2) The operating curve was shown by composing the resonance curves when the hula-hoops rotate and those when they do not. (3) The amount of generated electric power is proportional to the second power of the external frequency. (4) The experimental and the numerical results were in good qualitative agreement with each other.

[1]  淳男 末岡,et al.  Direct Numerical Integral Method to Determine Periodic Solutions of Nonlinear Systems. Equations of Motion with Discontinuous Functions. , 1993 .

[2]  Osamu Nishihara,et al.  Vibration control of a ropeway carrier by passive dynamic vibration absorbers , 1995 .

[3]  B. G. Korenev.  Dynamic vibration absorbers , 1993 .

[4]  Akio Nagamatsu,et al.  Vibration control in a tower structure by a two-dimensional active mass damper with an LQ control system. , 1988 .

[5]  Yohji Okada,et al.  Adaptive Control of an Active Mass Damper to Reduce Structural Vibration , 1990 .

[6]  淳男 末岡,et al.  機械・構造物の制振と発電を同時に行う装置の研究 : 強制-自由度系の制振 , 2000 .

[7]  T. Aprille,et al.  A computer algorithm to determine the steady-state response of nonlinear oscillators , 1972 .

[8]  Yutaka Yoshitake,et al.  Quenching of Self-Excited Vibrations and Generation of Electricity by Using Hula-Hoop. , 2000 .

[9]  一登 背戸,et al.  動吸振器による多自由度系の制振 : 第1報,動吸振器の設計理論 , 1984 .

[10]  Alexander Kusko.  Solid State DC Motor Drives , 1969 .

[11]  H. H. E. Leipholz,et al.  Control of structures , 1986 .

[12]  Dean Karnopp,et al.  Vibration Control Using Semi-Active Force Generators , 1974 .

[13]  John Roorda,et al.  Tendon Control in Tall Structures , 1975 .

[14]  M. Oestreich,et al.  Bifurcation and stability analysis for a non-smooth friction oscillator , 1996 .