Research Article
Multirobot System to Explore Unknown Environment with Connection Maintenance
Table 8
Comparison of the proposed exploration approaches with different communication ranges for environment 2.
| 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 | 301 | 363 | 302 | 10266 | 10581 | 10351 | 840 | 842 | 848 | 100 | 277 | 339 | 278 | 10016 | 10331 | 10101 | 765 | 767 | 773 | 150 | 257 | 319 | 258 | 9516 | 9831 | 9601 | 715 | 717 | 723 | 200 | 237 | 299 | 238 | 8966 | 9281 | 9051 | 655 | 657 | 663 | 250 | 225 | 287 | 226 | 8376 | 8691 | 8461 | 575 | 577 | 583 |
| 2 | 50 | 241 | 303 | 242 | 5371 | 5686 | 5456 | 765 | 767 | 773 | 100 | 217 | 279 | 218 | 5121 | 5436 | 5206 | 690 | 692 | 698 | 150 | 197 | 259 | 198 | 4621 | 4936 | 4706 | 640 | 642 | 648 | 200 | 177 | 239 | 178 | 4071 | 4386 | 4156 | 580 | 582 | 588 | 250 | 165 | 227 | 166 | 3481 | 3796 | 3566 | 500 | 502 | 508 |
| 3 | 50 | 211 | 273 | 212 | 5000 | 5315 | 5085 | 705 | 707 | 713 | 100 | 187 | 249 | 188 | 4750 | 5065 | 4835 | 630 | 632 | 638 | 150 | 167 | 229 | 168 | 4250 | 4565 | 4335 | 580 | 582 | 588 | 200 | 147 | 209 | 148 | 3700 | 4015 | 3785 | 520 | 522 | 528 | 250 | 135 | 197 | 136 | 3110 | 3425 | 3195 | 440 | 442 | 448 |
| 4 | 50 | 177 | 239 | 178 | 4779 | 5094 | 4864 | 655 | 657 | 663 | 100 | 153 | 215 | 154 | 4529 | 4844 | 4614 | 580 | 582 | 588 | 150 | 133 | 195 | 134 | 4029 | 4344 | 4114 | 530 | 532 | 538 | 200 | 113 | 175 | 114 | 3479 | 3794 | 3564 | 470 | 472 | 478 | 250 | 101 | 163 | 102 | 2889 | 3204 | 2974 | 390 | 392 | 398 |
| 5 | 50 | 149 | 211 | 150 | 4303 | 4618 | 4388 | 605 | 607 | 613 | 100 | 125 | 187 | 126 | 4053 | 4368 | 4138 | 530 | 532 | 538 | 150 | 105 | 167 | 106 | 3553 | 3868 | 3638 | 480 | 482 | 488 | 200 | 85 | 147 | 86 | 3003 | 3318 | 3088 | 420 | 422 | 428 | 250 | 73 | 135 | 74 | 2413 | 2728 | 2498 | 340 | 342 | 348 |
| 6 | 50 | 126 | 188 | 127 | 3917 | 4232 | 4002 | 553 | 555 | 561 | 100 | 102 | 164 | 103 | 3667 | 3982 | 3752 | 478 | 480 | 486 | 150 | 82 | 144 | 83 | 3167 | 3482 | 3252 | 428 | 430 | 436 | 200 | 62 | 124 | 63 | 2617 | 2932 | 2702 | 368 | 370 | 376 | 250 | 50 | 112 | 51 | 2027 | 2342 | 2112 | 288 | 290 | 296 |
| 7 | 50 | 113 | 175 | 114 | 3545 | 3860 | 3630 | 504 | 506 | 512 | 100 | 89 | 151 | 90 | 3295 | 3610 | 3380 | 429 | 431 | 437 | 150 | 69 | 131 | 70 | 2795 | 3110 | 2880 | 379 | 381 | 387 | 200 | 49 | 111 | 50 | 2245 | 2560 | 2330 | 319 | 321 | 327 | 250 | 37 | 99 | 38 | 1655 | 1970 | 1740 | 239 | 241 | 247 |
| 8 | 50 | 95 | 157 | 96 | 3134 | 3449 | 3219 | 452 | 454 | 460 | 100 | 71 | 133 | 72 | 2884 | 3199 | 2969 | 377 | 379 | 385 | 150 | 51 | 113 | 52 | 2384 | 2699 | 2469 | 327 | 329 | 335 | 200 | 31 | 93 | 32 | 1834 | 2149 | 1919 | 267 | 269 | 275 | 250 | 19 | 81 | 20 | 1244 | 1559 | 1329 | 187 | 189 | 195 |
| 9 | 50 | 83 | 145 | 84 | 3026 | 3341 | 3111 | 401 | 403 | 409 | 100 | 59 | 121 | 60 | 2776 | 3091 | 2861 | 326 | 328 | 334 | 150 | 39 | 101 | 40 | 2276 | 2591 | 2361 | 276 | 278 | 284 | 200 | 19 | 81 | 20 | 1726 | 2041 | 1811 | 216 | 218 | 224 | 250 | 7 | 69 | 8 | 1136 | 1451 | 1221 | 136 | 138 | 144 |
| 10 | 50 | 70 | 132 | 71 | 2789 | 3104 | 2874 | 353 | 355 | 361 | 100 | 46 | 108 | 47 | 2539 | 2854 | 2624 | 278 | 280 | 286 | 150 | 26 | 88 | 27 | 2039 | 2354 | 2124 | 228 | 230 | 236 | 200 | 6 | 68 | 7 | 1489 | 1804 | 1574 | 168 | 170 | 176 | 250 | 4 | 66 | 5 | 899 | 1214 | 984 | 88 | 90 | 96 |
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