Research Article
Multirobot System to Explore Unknown Environment with Connection Maintenance
Table 12
Comparison of the proposed exploration approaches with different sensor ranges for environment 3.
| No. of robots | Sensor range | Path length | Exploration | Total no. of cycles | Centralized | Leader-follower | Ad hoc | Centralized | Leader-follower | Ad hoc | Centralized | Leader-follower | Ad hoc |
| 1 | 50 | 312 | 368 | 306 | 10479 | 10619 | 10379 | 875 | 852 | 853 | 100 | 288 | 344 | 282 | 10229 | 10369 | 10129 | 800 | 777 | 778 | 150 | 268 | 324 | 262 | 9729 | 9869 | 9629 | 750 | 727 | 728 | 200 | 248 | 304 | 242 | 9179 | 9319 | 9079 | 690 | 667 | 668 | 250 | 236 | 292 | 230 | 8589 | 8729 | 8489 | 610 | 587 | 588 |
| 2 | 50 | 252 | 308 | 246 | 5584 | 5724 | 5484 | 800 | 777 | 778 | 100 | 228 | 284 | 222 | 5334 | 5474 | 5234 | 725 | 702 | 703 | 150 | 208 | 264 | 202 | 4834 | 4974 | 4734 | 675 | 652 | 653 | 200 | 188 | 244 | 182 | 4284 | 4424 | 4184 | 615 | 592 | 593 | 250 | 176 | 232 | 170 | 3694 | 3834 | 3594 | 535 | 512 | 513 |
| 3 | 50 | 222 | 278 | 216 | 5213 | 5353 | 5113 | 740 | 717 | 718 | 100 | 198 | 254 | 192 | 4963 | 5103 | 4863 | 665 | 642 | 643 | 150 | 178 | 234 | 172 | 4463 | 4603 | 4363 | 615 | 592 | 593 | 200 | 158 | 214 | 152 | 3913 | 4053 | 3813 | 555 | 532 | 533 | 250 | 146 | 202 | 140 | 3323 | 3463 | 3223 | 475 | 452 | 453 |
| 4 | 50 | 188 | 244 | 182 | 4992 | 5132 | 4892 | 690 | 667 | 668 | 100 | 164 | 220 | 158 | 4742 | 4882 | 4642 | 615 | 592 | 593 | 150 | 144 | 200 | 138 | 4242 | 4382 | 4142 | 565 | 542 | 543 | 200 | 124 | 180 | 118 | 3692 | 3832 | 3592 | 505 | 482 | 483 | 250 | 112 | 168 | 106 | 3102 | 3242 | 3002 | 425 | 402 | 403 |
| 5 | 50 | 160 | 216 | 154 | 4516 | 4656 | 4416 | 640 | 617 | 618 | 100 | 136 | 192 | 130 | 4266 | 4406 | 4166 | 565 | 542 | 543 | 150 | 116 | 172 | 110 | 3766 | 3906 | 3666 | 515 | 492 | 493 | 200 | 96 | 152 | 90 | 3216 | 3356 | 3116 | 455 | 432 | 433 | 250 | 84 | 140 | 78 | 2626 | 2766 | 2526 | 375 | 352 | 353 |
| 6 | 50 | 137 | 193 | 131 | 4130 | 4270 | 4030 | 588 | 565 | 566 | 100 | 113 | 169 | 107 | 3880 | 4020 | 3780 | 513 | 490 | 491 | 150 | 93 | 149 | 87 | 3380 | 3520 | 3280 | 463 | 440 | 441 | 200 | 73 | 129 | 67 | 2830 | 2970 | 2730 | 403 | 380 | 381 | 250 | 61 | 117 | 55 | 2240 | 2380 | 2140 | 323 | 300 | 301 |
| 7 | 50 | 124 | 180 | 118 | 3758 | 3898 | 3658 | 539 | 516 | 517 | 100 | 100 | 156 | 94 | 3508 | 3648 | 3408 | 464 | 441 | 442 | 150 | 80 | 136 | 74 | 3008 | 3148 | 2908 | 414 | 391 | 392 | 200 | 60 | 116 | 54 | 2458 | 2598 | 2358 | 354 | 331 | 332 | 250 | 48 | 104 | 42 | 1868 | 2008 | 1768 | 274 | 251 | 252 |
| 8 | 50 | 106 | 162 | 100 | 3347 | 3487 | 3247 | 487 | 464 | 465 | 100 | 82 | 138 | 76 | 3097 | 3237 | 2997 | 412 | 389 | 390 | 150 | 62 | 118 | 56 | 2597 | 2737 | 2497 | 362 | 339 | 340 | 200 | 42 | 98 | 36 | 2047 | 2187 | 1947 | 302 | 279 | 280 | 250 | 30 | 86 | 24 | 1457 | 1597 | 1357 | 222 | 199 | 200 |
| 9 | 50 | 94 | 150 | 88 | 3239 | 3379 | 3139 | 436 | 413 | 414 | 100 | 70 | 126 | 64 | 2989 | 3129 | 2889 | 361 | 338 | 339 | 150 | 50 | 106 | 44 | 2489 | 2629 | 2389 | 311 | 288 | 289 | 200 | 30 | 86 | 24 | 1939 | 2079 | 1839 | 251 | 228 | 229 | 250 | 18 | 74 | 12 | 1349 | 1489 | 1249 | 171 | 148 | 149 |
| 10 | 50 | 81 | 137 | 75 | 3002 | 3142 | 2902 | 388 | 365 | 366 | 100 | 57 | 113 | 51 | 2752 | 2892 | 2652 | 313 | 290 | 291 | 150 | 37 | 93 | 31 | 2252 | 2392 | 2152 | 263 | 240 | 241 | 200 | 17 | 73 | 11 | 1702 | 1842 | 1602 | 203 | 180 | 181 | 250 | 15 | 71 | 9 | 1112 | 1252 | 1012 | 123 | 100 | 101 |
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