172 lines
6.4 KiB
Python
172 lines
6.4 KiB
Python
import random
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import math
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import matplotlib.pyplot as plt
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import matplotlib.patches as patches
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import numpy as np
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from ga import GA
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import plot_util
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# 固定随机种子，便于复现
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random.seed(42)
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# ---------------------------
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# 参数设置
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# ---------------------------
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H = 20 # 区域高度，网格点之间的距离为25m（单位距离）
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W = 25 # 区域宽度
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k = 1 # 系统数量（车-巢-机系统个数）
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num_iterations = 10000 # 蒙特卡洛模拟迭代次数
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# 时间系数（单位：秒，每个网格一张照片）
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flight_time_factor = 3 # 每张照片对应的飞行时间，无人机飞行速度为9.5m/s，拍摄照片的时间间隔为3s
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comp_uav_factor = 5 # 无人机上每张照片计算时间，5s
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trans_time_factor = 0.3 # 每张照片传输时间，0.3s
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car_move_time_factor = 2 * 50 # TODO 汽车每单位距离的移动时间，2s，加了一个放大因子
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comp_bs_factor = 5 # 机巢上每张照片计算时间
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# 其他参数
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flight_energy_factor = 0.05 # 单位：分钟/张
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comp_energy_factor = 0.05 # 计算能耗需要重新估计
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trans_energy_factor = 0.0025
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battery_capacity = 10 # 无人机只进行飞行，续航为30分钟
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# bs_energy_factor =
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# car_energy_factor =
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# ---------------------------
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# 蒙特卡洛模拟，寻找最佳方案
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# ---------------------------
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best_T = float('inf')
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best_solution = None
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for iteration in range(num_iterations):
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# 随机生成分区的行分段数与列分段数
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R = random.randint(1, 5) # 行分段数
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C = random.randint(1, 5) # 列分段数
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# 生成随机的行、列分割边界
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row_boundaries = sorted(random.sample(range(1, H), R - 1))
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row_boundaries = [0] + row_boundaries + [H]
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col_boundaries = sorted(random.sample(range(1, W), C - 1))
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col_boundaries = [0] + col_boundaries + [W]
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# ---------------------------
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# 根据分割边界生成所有矩形任务
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# ---------------------------
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rectangles = []
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valid_partition = True # 标记此分区是否满足所有约束
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for i in range(len(row_boundaries) - 1):
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for j in range(len(col_boundaries) - 1):
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r1 = row_boundaries[i]
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r2 = row_boundaries[i + 1]
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c1 = col_boundaries[j]
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c2 = col_boundaries[j + 1]
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d = (r2 - r1) * (c2 - c1) # 任务的照片数量（矩形面积）
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# 求解rho
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rho_time_limit = (flight_time_factor - trans_time_factor) / \
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(comp_uav_factor - trans_time_factor)
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rho_energy_limit = (battery_capacity - flight_energy_factor * d - trans_energy_factor * d) / \
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(comp_energy_factor * d - trans_energy_factor * d)
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if rho_energy_limit < 0:
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valid_partition = False
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break
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rho = min(rho_time_limit, rho_energy_limit)
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# print(rho)
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flight_time = flight_time_factor * d
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comp_time = comp_uav_factor * rho * d
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trans_time = trans_time_factor * (1 - rho) * d
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comp_bs_time = comp_bs_factor * (1 - rho) * d
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# 计算任务矩形中心，用于后续车辆移动时间计算
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center_r = (r1 + r2) / 2.0
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center_c = (c1 + c2) / 2.0
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rectangles.append({
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'r1': r1, 'r2': r2, 'c1': c1, 'c2': c2,
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'd': d,
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'rho': rho,
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'flight_time': flight_time,
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'comp_time': comp_time,
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'trans_time': trans_time,
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'comp_bs_time': comp_bs_time,
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'center': [center_r, center_c]
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})
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if not valid_partition:
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break
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# 如果有中存在任务不满足电池约束，则跳过这种分区
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if not valid_partition:
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continue
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# ---------------------------
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# 使用遗传算法，寻找最佳方案
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# ---------------------------
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num_city = len(rectangles) + 1 # 划分好的区域中心点+整个区域的中心
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epochs = 3000
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# 初始化坐标 (第一个点是整个区域的中心)
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center_data = [[H / 2.0, W / 2.0]]
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for rec in rectangles:
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center_data.append(rec['center'])
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center_data = np.array(center_data)
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# 关键：有k架无人机，则再增加N-1个`点` (坐标是起始点)，这些点之间的距离是inf
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for d in range(k - 1):
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center_data = np.vstack([center_data, center_data[0]])
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num_city += 1 # 增加欺骗城市
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to_process_idx = [0]
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# print("start point:", location[0])
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for d in range(1, k): # 1, ... drone-1
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# print("added base point:", location[num_city - d])
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to_process_idx.append(num_city - d)
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model = GA(num_drones=k, num_city=center_data.shape[0], num_total=20, data=center_data.copy(), to_process_idx=to_process_idx, rectangles=rectangles)
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Best_path, Best = model.run()
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# 根据最佳路径计算各系统任务分配
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if Best_path[0] not in to_process_idx:
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Best_path.insert(0, 0)
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if Best_path[-1] not in to_process_idx:
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Best_path.append(0)
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# 计算各系统的任务分配
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system_tasks = []
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found_start_points_indices = []
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for i in range(len(Best_path)):
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if Best_path[i] in to_process_idx:
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found_start_points_indices.append(i)
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for j in range(len(found_start_points_indices) - 1):
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from_index = found_start_points_indices[j]
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end_index = found_start_points_indices[j + 1]
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system_task = []
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for k in range(from_index, end_index + 1):
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if Best_path[k] not in to_process_idx:
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system_task.append(rectangles[Best_path[k] - 1])
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system_tasks.append(system_task)
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if Best < best_T:
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best_T = Best
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best_solution = {
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'system_tasks': system_tasks,
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# 'T_k_list': T_k_list,
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'best_T': best_T,
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'iteration': iteration,
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'R': R,
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'C': C,
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'row_boundaries': row_boundaries,
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'col_boundaries': col_boundaries
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}
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# ---------------------------
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# 输出最佳方案
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# ---------------------------
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if best_solution is not None:
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print("最佳 T (各系统中最长的完成时间):", best_solution['best_T'])
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for i in range(k):
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num_tasks = len(best_solution['system_tasks'][i])
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print(
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f"系统 {i}: 飞行任务数量: {num_tasks}")
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else:
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print("在给定的模拟次数内未找到满足所有约束的方案。") |