噪声与振动控制
譟聲與振動控製
조성여진동공제
NOISE AND VIBRATION CONTROL
2015年
2期
36-40
,共5页
振动与波%压电发电机%非线性振动%动力学模型%动态响应%振动特性
振動與波%壓電髮電機%非線性振動%動力學模型%動態響應%振動特性
진동여파%압전발전궤%비선성진동%동역학모형%동태향응%진동특성
vibration and wave%piezoelectric generator%nonlinear vibration%dynamic model%dynamic response%vi-bration performance
基于双稳态压电振动发电机系统参数的非线性，建立了随机激励环境下压电振动发电机的动力学模型。研究了振源频率改变、振源个数选取和振幅变化对系统输出响应的影响，分析了磁间距变化对系统双稳态特性和输出电压的影响。结果表明：当振源频率或振幅改变时，系统响应表现为小幅周期运动、大幅混沌运动和小幅周期运动。当多个振源激励时，压电振动发电机具有更大的谐振带宽和更高的能量转换效率。当磁间距为3.9 mm<d<6.6 mm时，系统具有双稳态特性，系统响应表现为大幅周期运动，此时压电振动发电机输出电压值最大。
基于雙穩態壓電振動髮電機繫統參數的非線性，建立瞭隨機激勵環境下壓電振動髮電機的動力學模型。研究瞭振源頻率改變、振源箇數選取和振幅變化對繫統輸齣響應的影響，分析瞭磁間距變化對繫統雙穩態特性和輸齣電壓的影響。結果錶明：噹振源頻率或振幅改變時，繫統響應錶現為小幅週期運動、大幅混沌運動和小幅週期運動。噹多箇振源激勵時，壓電振動髮電機具有更大的諧振帶寬和更高的能量轉換效率。噹磁間距為3.9 mm<d<6.6 mm時，繫統具有雙穩態特性，繫統響應錶現為大幅週期運動，此時壓電振動髮電機輸齣電壓值最大。
기우쌍은태압전진동발전궤계통삼수적비선성，건립료수궤격려배경하압전진동발전궤적동역학모형。연구료진원빈솔개변、진원개수선취화진폭변화대계통수출향응적영향，분석료자간거변화대계통쌍은태특성화수출전압적영향。결과표명：당진원빈솔혹진폭개변시，계통향응표현위소폭주기운동、대폭혼돈운동화소폭주기운동。당다개진원격려시，압전진동발전궤구유경대적해진대관화경고적능량전환효솔。당자간거위3.9 mm<d<6.6 mm시，계통구유쌍은태특성，계통향응표현위대폭주기운동，차시압전진동발전궤수출전압치최대。
The dynamic model of a piezoelectric vibration generator under random excitation was established based on the nonlinearity of its parameters. Influences of the changes of frequency and amplitude, and the choice of numbers of vibra-tion sources on the system output response were studied. Effect of the magnetic distance d changes on the bistable character-istics and the system output voltages was analyzed. The results show that when the frequency or amplitude of the vibration source changes, the system response develops from small periodic motion to large chaotic motion, and then returns to the small periodic motion. Under the multi-source excitation, the piezoelectric vibration generator has larger resonant bandwidth and higher energy conversion efficiency. When 3.9 mm<d<6.6mm, the system has bistable characteristics and vibrate with large period, and the output voltage of the piezoelectric vibration generator will get the maximum.
