The Influence of the Load Type on the Center Frequency Tuning of the Variable-Flux Biaxial Energy Harvester

<table class="table-group" id="tab4"><tr><td><table class="table"><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr class="thead"><td class="align_left">Resistance <svg height="11.5564pt" id="M85" style="vertical-align:-2.26807pt" version="1.1" viewbox="-0.0498162 -9.28833 19.0073 11.5564" width="19.0073pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M300 -147C201 -63 143 98 143 270S200 602 300 686L282 710C136 610 70 450 70 271V270C70 89 136 -72 282 -170L300 -147Z"></path></g><g transform="matrix(.013,0,0,-0.013,4.498,0)"><path d="M719 146L691 147C666 77 657 72 612 72H528C572 125 688 224 688 364C688 546 558 665 384 665C212 665 77 541 77 361C77 221 188 124 239 72H150C110 72 97 80 73 147L46 146L63 0H307L314 18C284 71 178 203 178 360C178 529 256 631 383 631C509 631 588 523 588 363C588 197 485 67 453 18L458 0H701L719 146Z"></path></g><g transform="matrix(.013,0,0,-0.013,14.339,0)"><path d="M275 270C275 450 212 609 64 710L45 686C145 604 203 442 203 270S147 -63 45 -147L64 -170C213 -68 275 89 275 270Z"></path></g></svg></td><td class="align_center">Center frequency <svg height="11.5564pt" id="M86" style="vertical-align:-2.26807pt" version="1.1" viewbox="-0.0498162 -9.28833 26.1971 11.5564" width="26.1971pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M300 -147C201 -63 143 98 143 270S200 602 300 686L282 710C136 610 70 450 70 271V270C70 89 136 -72 282 -170L300 -147Z"></path></g><g transform="matrix(.013,0,0,-0.013,4.498,0)"><path d="M828 650H570L564 622C646 614 650 609 634 524L604 366H253L281 524C296 608 308 615 382 622L388 650H132L126 622C211 615 214 609 198 524L121 122C106 42 102 35 23 28L17 0H276L282 28C196 35 191 40 206 122L243 324H597L559 123C544 42 537 35 452 28L446 0H710L716 28C632 35 628 43 643 122L719 524C735 610 741 615 822 622L828 650Z"></path></g><g transform="matrix(.013,0,0,-0.013,15.03,0)"><path d="M475 445L452 468C423 436 401 426 385 426S352 427 305 436C268 443 216 448 185 448C156 448 128 425 102 382C89 360 77 338 64 304L89 291C117 340 143 380 190 380C214 380 268 376 295 373C320 370 344 371 362 374L70 101C32 65 23 36 23 18C23 5 27 -3 31 -8C36 -8 39 -6 42 -1C52 15 67 31 80 40S110 49 143 33C195 8 257 -20 290 -20C339 -20 382 11 439 129L416 148C366 74 334 55 305 55C278 55 236 68 203 81C169 94 141 100 122 96C205 170 348 308 411 376L475 445Z"></path></g><g transform="matrix(.013,0,0,-0.013,21.505,0)"><path d="M275 270C275 450 212 609 64 710L45 686C145 604 203 442 203 270S147 -63 45 -147L64 -170C213 -68 275 89 275 270Z"></path></g></svg></td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left">0</td><td class="align_center">8.75</td></tr><tr><td class="align_left">5</td><td class="align_center">8.84</td></tr><tr><td class="align_left">8.6</td><td class="align_center">8.86</td></tr><tr><td class="align_left">22.6</td><td class="align_center">8.81</td></tr><tr><td class="align_left">100</td><td class="align_center">8.83</td></tr><tr><td class="align_left">1000</td><td class="align_center">8.84</td></tr><tr><td class="align_left">2000</td><td class="align_center">8.79</td></tr><tr><td class="align_left">3240</td><td class="align_center">8.84</td></tr><tr><td class="align_left">9000</td><td class="align_center">8.66</td></tr><tr><td class="align_left">Open loop (no load)</td><td class="align_center">8.18</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>VBH center frequency for purely resistance loads.</div>

Shock and Vibration

tab4

Table 4

Table 4: The Influence of the Load Type on the Center Frequency Tuning of the Variable-Flux Biaxial Energy Harvester 