基于脉冲液流换能器的振动能量回收原理与实验研究

针对自供电磁流变阻尼调节系统的能量供给问题，提出基于脉冲液流换能器的振动能量回收方法，通过振动能-液流能-机械能-电能的变换，实现振动能量回收。建立了基于齿轮马达、飞轮和永磁发动机的脉冲液流换能器分析模型，利用Matlab软件对正弦振动下换能器的电压输出特性、功率转换特性和转换效率进行仿真。为验证理论分析的正确性，设计制作了基于脉冲液流换能器的振动能量回收装置，利用J95-I减振器测试台上对振动能量回收装置实验测试，比较了正弦激励条件下换能器的理论电压特性与实测电压特性、理论转换效率与实验转换效率。实验研究表明，脉冲液流换能器是能够实现振动能量的转换，在带30 负载情况下，效率可以达到 46.85%，平均输出功率可以达到37.4W。

Study on Vibration Energy Harvesting Fundamentals Based on Pulse Fluid Flow Transducer and Experimental Tests

To solve the energy supply problem of self-powered Magneto-rheological damping modulator system, a vibration energy harvesting system based on pulse fluid flow transducer is put forward, in which energy transducer process is vibration energy→fluid flow energy→mechanical energy→electrical energy to realize vibration energy harvesting. Analytical model of vibration energy harvesting system, which is composed of gear motor, flywheel and permanent magnet generator, is set up. Output voltage, power conversion and conversion efficiency of the pulse fluid flow transducer are simulated via Matlab software in the condition of sine vibration. In order to verify the rationality of the analytical method, a kind of vibration energy harvesting device based on pulse fluid flow transducer is designed and fabricated. The vibration energy harvesting system is tested by J95-I type shock absorber test-bed. Under the sinusoidal excitation condition, the theoretical voltage characteristics are compared with those from tests, and the theoretical efficiencies are compared with experimental efficiencies. It shows that vibration energy harvesting system can implement to vibration energy harvesting, in which energy conversion efficiency reach to 48.65% and average output power up to 37.4 watt in the condition of load of 30 ohm.