Research Article
Multirobot System to Explore Unknown Environment with Connection Maintenance
Table 7
Comparison of the proposed exploration approaches with different communication ranges for environment 1.
| No. of robots | Communication 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 | 304 | 366 | 300 | 10466 | 10571 | 10366 | 860 | 840 | 845 | 100 | 280 | 342 | 276 | 10216 | 10321 | 10116 | 785 | 765 | 770 | 150 | 260 | 322 | 256 | 9716 | 9821 | 9616 | 735 | 715 | 720 | 200 | 240 | 302 | 236 | 9166 | 9271 | 9066 | 675 | 655 | 660 | 250 | 228 | 290 | 224 | 8576 | 8681 | 8476 | 595 | 575 | 580 |
| 2 | 50 | 244 | 306 | 240 | 5571 | 5676 | 5471 | 785 | 765 | 770 | 100 | 220 | 282 | 216 | 5321 | 5426 | 5221 | 710 | 690 | 695 | 150 | 200 | 262 | 196 | 4821 | 4926 | 4721 | 660 | 640 | 645 | 200 | 180 | 242 | 176 | 4271 | 4376 | 4171 | 600 | 580 | 585 | 250 | 168 | 230 | 164 | 3681 | 3786 | 3581 | 520 | 500 | 505 |
| 3 | 50 | 214 | 276 | 210 | 5200 | 5305 | 5100 | 725 | 705 | 710 | 100 | 190 | 252 | 186 | 4950 | 5055 | 4850 | 650 | 630 | 635 | 150 | 170 | 232 | 166 | 4450 | 4555 | 4350 | 600 | 580 | 585 | 200 | 150 | 212 | 146 | 3900 | 4005 | 3800 | 540 | 520 | 525 | 250 | 138 | 200 | 134 | 3310 | 3415 | 3210 | 460 | 440 | 445 |
| 4 | 50 | 180 | 242 | 176 | 4979 | 5084 | 4879 | 675 | 655 | 660 | 100 | 156 | 218 | 152 | 4729 | 4834 | 4629 | 600 | 580 | 585 | 150 | 136 | 198 | 132 | 4229 | 4334 | 4129 | 550 | 530 | 535 | 200 | 116 | 178 | 112 | 3679 | 3784 | 3579 | 490 | 470 | 475 | 250 | 104 | 166 | 100 | 3089 | 3194 | 2989 | 410 | 390 | 395 |
| 5 | 50 | 152 | 214 | 148 | 4503 | 4608 | 4403 | 625 | 605 | 610 | 100 | 128 | 190 | 124 | 4253 | 4358 | 4153 | 550 | 530 | 535 | 150 | 108 | 170 | 104 | 3753 | 3858 | 3653 | 500 | 480 | 485 | 200 | 88 | 150 | 84 | 3203 | 3308 | 3103 | 440 | 420 | 425 | 250 | 76 | 138 | 72 | 2613 | 2718 | 2513 | 360 | 340 | 345 |
| 6 | 50 | 129 | 191 | 125 | 4117 | 4222 | 4017 | 573 | 553 | 558 | 100 | 105 | 167 | 101 | 3867 | 3972 | 3767 | 498 | 478 | 483 | 150 | 85 | 147 | 81 | 3367 | 3472 | 3267 | 448 | 428 | 433 | 200 | 65 | 127 | 61 | 2817 | 2922 | 2717 | 388 | 368 | 373 | 250 | 53 | 115 | 49 | 2227 | 2332 | 2127 | 308 | 288 | 293 |
| 7 | 50 | 116 | 178 | 112 | 3745 | 3850 | 3645 | 524 | 504 | 509 | 100 | 92 | 154 | 88 | 3495 | 3600 | 3395 | 449 | 429 | 434 | 150 | 72 | 134 | 68 | 2995 | 3100 | 2895 | 399 | 379 | 384 | 200 | 52 | 114 | 48 | 2445 | 2550 | 2345 | 339 | 319 | 324 | 250 | 40 | 102 | 36 | 1855 | 1960 | 1755 | 259 | 239 | 244 |
| 8 | 50 | 98 | 160 | 94 | 3334 | 3439 | 3234 | 472 | 452 | 457 | 100 | 74 | 136 | 70 | 3084 | 3189 | 2984 | 397 | 377 | 382 | 150 | 54 | 116 | 50 | 2584 | 2689 | 2484 | 347 | 327 | 332 | 200 | 34 | 96 | 30 | 2034 | 2139 | 1934 | 287 | 267 | 272 | 250 | 22 | 84 | 18 | 1444 | 1549 | 1344 | 207 | 187 | 192 |
| 9 | 50 | 86 | 148 | 82 | 3226 | 3331 | 3126 | 421 | 401 | 406 | 100 | 62 | 124 | 58 | 2976 | 3081 | 2876 | 346 | 326 | 331 | 150 | 42 | 104 | 38 | 2476 | 2581 | 2376 | 296 | 276 | 281 | 200 | 22 | 84 | 18 | 1926 | 2031 | 1826 | 236 | 216 | 221 | 250 | 10 | 72 | 6 | 1336 | 1441 | 1236 | 156 | 136 | 141 |
| 10 | 50 | 73 | 135 | 69 | 2989 | 3094 | 2889 | 373 | 353 | 358 | 100 | 49 | 111 | 45 | 2739 | 2844 | 2639 | 298 | 278 | 283 | 150 | 29 | 91 | 25 | 2239 | 2344 | 2139 | 248 | 228 | 233 | 200 | 19 | 71 | 5 | 1689 | 1794 | 1589 | 188 | 168 | 173 | 250 | 7 | 69 | 3 | 1099 | 1204 | 999 | 108 | 88 | 93 |
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