Research Article
Multirobot System to Explore Unknown Environment with Connection Maintenance
Table 9
Comparison of the proposed exploration approaches with different communication ranges for environment 3.
| 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 | 305 | 360 | 305 | 10274 | 10591 | 10366 | 830 | 844 | 850 | 100 | 281 | 336 | 281 | 10024 | 10341 | 10116 | 755 | 769 | 775 | 150 | 261 | 316 | 261 | 9524 | 9841 | 9616 | 705 | 719 | 725 | 200 | 241 | 296 | 241 | 8974 | 9291 | 9066 | 645 | 659 | 665 | 250 | 229 | 284 | 229 | 8384 | 8701 | 8476 | 565 | 579 | 585 |
| 2 | 50 | 245 | 300 | 245 | 5379 | 5696 | 5471 | 755 | 769 | 775 | 100 | 221 | 276 | 221 | 5129 | 5446 | 5221 | 680 | 694 | 700 | 150 | 201 | 256 | 201 | 4629 | 4946 | 4721 | 630 | 644 | 650 | 200 | 181 | 236 | 181 | 4079 | 4396 | 4171 | 570 | 584 | 590 | 250 | 169 | 224 | 169 | 3489 | 3806 | 3581 | 490 | 504 | 510 |
| 3 | 50 | 215 | 270 | 215 | 5008 | 5325 | 5100 | 695 | 709 | 715 | 100 | 191 | 246 | 191 | 4758 | 5075 | 4850 | 620 | 634 | 640 | 150 | 171 | 226 | 171 | 4258 | 4575 | 4350 | 570 | 584 | 590 | 200 | 151 | 206 | 151 | 3708 | 4025 | 3800 | 510 | 524 | 530 | 250 | 139 | 194 | 139 | 3118 | 3435 | 3210 | 430 | 444 | 450 |
| 4 | 50 | 181 | 236 | 181 | 4787 | 5104 | 4879 | 645 | 659 | 665 | 100 | 157 | 212 | 157 | 4537 | 4854 | 4629 | 570 | 584 | 590 | 150 | 137 | 192 | 137 | 4037 | 4354 | 4129 | 520 | 534 | 540 | 200 | 117 | 172 | 117 | 3487 | 3804 | 3579 | 460 | 474 | 480 | 250 | 105 | 160 | 105 | 2897 | 3214 | 2989 | 380 | 394 | 400 |
| 5 | 50 | 153 | 208 | 153 | 4311 | 4628 | 4403 | 595 | 609 | 615 | 100 | 129 | 184 | 129 | 4061 | 4378 | 4153 | 520 | 534 | 540 | 150 | 109 | 164 | 109 | 3561 | 3878 | 3653 | 470 | 484 | 490 | 200 | 89 | 144 | 89 | 3011 | 3328 | 3103 | 410 | 424 | 430 | 250 | 77 | 132 | 77 | 2421 | 2738 | 2513 | 330 | 344 | 350 |
| 6 | 50 | 130 | 185 | 130 | 3925 | 4242 | 4017 | 543 | 557 | 563 | 100 | 106 | 161 | 106 | 3675 | 3992 | 3767 | 468 | 482 | 488 | 150 | 86 | 141 | 86 | 3175 | 3492 | 3267 | 418 | 432 | 438 | 200 | 66 | 121 | 66 | 2625 | 2942 | 2717 | 358 | 372 | 378 | 250 | 54 | 109 | 54 | 2035 | 2352 | 2127 | 278 | 292 | 298 |
| 7 | 50 | 117 | 172 | 117 | 3553 | 3870 | 3645 | 494 | 508 | 514 | 100 | 93 | 148 | 93 | 3303 | 3620 | 3395 | 419 | 433 | 439 | 150 | 73 | 128 | 73 | 2803 | 3120 | 2895 | 369 | 383 | 389 | 200 | 53 | 108 | 53 | 2253 | 2570 | 2345 | 309 | 323 | 329 | 250 | 41 | 96 | 41 | 1663 | 1980 | 1755 | 229 | 243 | 249 |
| 8 | 50 | 99 | 154 | 99 | 3142 | 3459 | 3234 | 442 | 456 | 462 | 100 | 75 | 130 | 75 | 2892 | 3209 | 2984 | 367 | 381 | 387 | 150 | 55 | 110 | 55 | 2392 | 2709 | 2484 | 317 | 331 | 337 | 200 | 35 | 90 | 35 | 1842 | 2159 | 1934 | 257 | 271 | 277 | 250 | 23 | 78 | 23 | 1252 | 1569 | 1344 | 177 | 191 | 197 |
| 9 | 50 | 87 | 142 | 87 | 3034 | 3351 | 3126 | 391 | 405 | 411 | 100 | 63 | 118 | 63 | 2784 | 3101 | 2876 | 316 | 330 | 336 | 150 | 43 | 98 | 43 | 2284 | 2601 | 2376 | 266 | 280 | 286 | 200 | 23 | 78 | 23 | 1734 | 2051 | 1826 | 206 | 220 | 226 | 250 | 11 | 66 | 11 | 1144 | 1461 | 1236 | 126 | 140 | 146 |
| 10 | 50 | 74 | 129 | 74 | 2797 | 3114 | 2889 | 343 | 357 | 363 | 100 | 50 | 105 | 50 | 2547 | 2864 | 2639 | 268 | 282 | 288 | 150 | 30 | 85 | 30 | 2047 | 2364 | 2139 | 218 | 232 | 238 | 200 | 10 | 65 | 10 | 1497 | 1814 | 1589 | 158 | 172 | 178 | 250 | 8 | 63 | 8 | 907 | 1224 | 999 | 78 | 92 | 98 |
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