ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

Giant magnetostrictive actuator characterized with strong bias magnetic field was designed to control the injector bullet valve opening and closing. Working principle of the actuator was described and suitable sinusoidal signals were analyzed by its bias characteristics. Semistatic model of the actuator displacement was established through reluctance theory, J-A model, quadratic domaintransfer model and linear system theory. Based on the model, the relationship between displacement and current amplitude under square signal was achieved, so did the displacementcurrent curve under sinusoidal signal and the displacementtime curve under square signal with the amplitude of 3A. Experimental system for the actuator was established, and the signal directions were recognized by testing under square signals with the same value while opposite directions. The testing displacements under sinusoidal and square signals were acquired. From the results, the displacement amplitudes under square signals and displacementcurrent curves under sinusoidal signals, calculated through the model, were similar to the testing results. Then the validation of the semistatic model was verified. The simulation of the actuator with an ordinary electrical injector input was done. With the square signal input in the amplitude of 3A, the steadystate displacement of the actuator was above 30μm, responding time was about 10μs, and overshoot was 0. The simulating results showed good performance of the actuator.