題組內容

2. A piezoelectric element Ri has a size 6124501c140f4.jpgand the Young's Modulus of ERI. And it can be activated to elongate a free deflection of ALRif, as shown in Fig2. Ao Wthout ked 04 Weadht - Joakel Figure 2: Three working situotions of the piezoele ectrlc element. When the piezoelement Ri is activated to elongate ㆍ please derive the following paramcters with the above- mentioned known parameters
6124503b88fa0.jpg

(a) Without loading, its maximum working force FRI, max and its spring constant krI of the piezoelement Ri, as shown in Fig2(a).(3%)