As a dynamic actuator for attenuating the engine-induced vibration transmitted to passenger vehicle chassis or investigating the vibration transfer path of the vehicle. an electromagnetic actuator. consisted of a runner, two stators and pairs of elect...
As a dynamic actuator for attenuating the engine-induced vibration transmitted to passenger vehicle chassis or investigating the vibration transfer path of the vehicle. an electromagnetic actuator. consisted of a runner, two stators and pairs of electromagnets and permanent magnets, is developed. It features that it is compact to be fit into the limited space and yet, it possesses high efficiency and wide frequency bandwidth for effective control of engine vibrations in standard size passenger cars.
By using the permanent magnets in electromagnetic system, we can increase the actuating force of the electromagnetic system and decrease the total amount of the power consumption of actuator when it operates. In addition an electronic circuit device is developed such that the displacement between the electromagnet pair and the target can be estimated from measurement of flux density of the installed permanent magnet only. It is found that the resolution and frequency bandwidth of the displacement estimator are about 3㎛ and 0 to 4㎑, respectively.
The designed electromagnetic actuator is capable of attenuating the vibration over the frequency range of 100 to 400㎐. which is satisfactory for applications of interest.