189 lines
9.1 KiB
Python
189 lines
9.1 KiB
Python
from dataloader import *
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from optimizer_genetic import *
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from optimizer_heuristic import *
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from optimizer_reconfiguration import *
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from base_optimizer.optimizer_interface import *
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def deviation(data):
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assert len(data) > 0
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average, variance = sum(data) / len(data), 0
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for v in data:
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variance += (v - average) ** 2
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return variance / len(data)
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def optimizer(pcb_data, component_data, line_optimizer, machine_optimizer, machine_number):
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if line_optimizer == "heuristic":
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assignment_result = assemblyline_optimizer_heuristic(pcb_data, component_data, machine_number)
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elif line_optimizer == "genetic":
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assignment_result = assemblyline_optimizer_genetic(pcb_data, component_data, machine_number)
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elif line_optimizer == "reconfiguration":
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assignment_result = reconfiguration_optimizer(pcb_data, component_data, machine_number)
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else:
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return
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assignment_result_cpy = copy.deepcopy(assignment_result)
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placement_points, assembly_info = [], []
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partial_pcb_data, partial_component_data = defaultdict(pd.DataFrame), defaultdict(pd.DataFrame)
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for machine_index in range(machine_number):
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partial_pcb_data[machine_index] = pd.DataFrame(columns=pcb_data.columns)
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partial_component_data[machine_index] = component_data.copy(deep=True)
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placement_points.append(sum(assignment_result[machine_index]))
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assert sum(placement_points) == len(pcb_data)
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# === averagely assign available feeder ===
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for part_index, data in component_data.iterrows():
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feeder_limit = data['feeder-limit']
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feeder_points = [assignment_result[machine_index][part_index] for machine_index in range(machine_number)]
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for machine_index in range(machine_number):
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if feeder_points[machine_index] == 0:
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continue
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arg_feeder = max(math.floor(feeder_points[machine_index] / sum(feeder_points) * data['feeder-limit']), 1)
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partial_component_data[machine_index].loc[part_index, 'feeder-limit'] = arg_feeder
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feeder_limit -= arg_feeder
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for machine_index in range(machine_number):
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if feeder_limit <= 0:
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break
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if feeder_points[machine_index] == 0:
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continue
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partial_component_data[machine_index].loc[part_index, 'feeder-limit'] += 1
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feeder_limit -= 1
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for machine_index in range(machine_number):
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if feeder_points[machine_index] > 0:
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assert partial_component_data[machine_index].loc[part_index, 'feeder-limit'] > 0
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# === assign placements ===
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component_machine_index = [0 for _ in range(len(component_data))]
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for _, data in pcb_data.iterrows():
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part_index = component_data[component_data['part'] == data['part']].index.tolist()[0]
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while True:
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machine_index = component_machine_index[part_index]
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if assignment_result[machine_index][part_index] == 0:
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component_machine_index[part_index] += 1
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machine_index += 1
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else:
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break
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assignment_result[machine_index][part_index] -= 1
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partial_pcb_data[machine_index] = pd.concat([partial_pcb_data[machine_index], pd.DataFrame(data).T])
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# === adjust the number of available feeders for single optimization separately ===
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for machine_index, data in partial_pcb_data.items():
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data = data.reset_index(drop=True)
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if len(data) == 0:
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continue
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part_info = [] # part info list：(part index, part points, available feeder-num, upper feeder-num)
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for part_index, cp_data in partial_component_data[machine_index].iterrows():
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if assignment_result_cpy[machine_index][part_index]:
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part_info.append(
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[part_index, assignment_result_cpy[machine_index][part_index], 1, cp_data['feeder-limit']])
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part_info = sorted(part_info, key=lambda x: x[1], reverse=True)
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start_index, end_index = 0, min(max_head_index - 1, len(part_info) - 1)
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while start_index < len(part_info):
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assign_part_point, assign_part_index = [], []
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for idx_ in range(start_index, end_index + 1):
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for _ in range(part_info[idx_][2]):
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assign_part_point.append(part_info[idx_][1] / part_info[idx_][2])
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assign_part_index.append(idx_)
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variance = deviation(assign_part_point)
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while start_index <= end_index:
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part_info_index = assign_part_index[np.argmax(assign_part_point)]
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if part_info[part_info_index][2] < part_info[part_info_index][3]: # 供料器数目上限的限制
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part_info[part_info_index][2] += 1
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end_index -= 1
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new_assign_part_point, new_assign_part_index = [], []
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for idx_ in range(start_index, end_index + 1):
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for _ in range(part_info[idx_][2]):
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new_assign_part_point.append(part_info[idx_][1] / part_info[idx_][2])
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new_assign_part_index.append(idx_)
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new_variance = deviation(new_assign_part_point)
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if variance < new_variance:
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part_info[part_info_index][2] -= 1
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end_index += 1
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break
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variance = new_variance
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assign_part_index, assign_part_point = new_assign_part_index.copy(), new_assign_part_point.copy()
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else:
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break
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start_index = end_index + 1
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end_index = min(start_index + max_head_index - 1, len(part_info) - 1)
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# update available feeder number
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max_avl_feeder = max(part_info, key=lambda x: x[2])[2]
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for info in part_info:
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partial_component_data[machine_index].loc[info[0], 'feeder-limit'] = math.ceil(info[2] / max_avl_feeder)
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assembly_info.append(base_optimizer(machine_index + 1, data, partial_component_data[machine_index],
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feeder_data=pd.DataFrame(columns=['slot', 'part', 'arg']),
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method=machine_optimizer, hinter=True))
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with open('model/lr_model.pkl', 'rb') as f:
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lr = pickle.load(f)
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average_time, standard_deviation_time = sum(
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[assembly_info[m].placement_time for m in range(machine_number)]) / machine_number, 0
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for machine_index in range(machine_number):
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total_component_types = sum(1 if pt else 0 for pt in assignment_result_cpy[machine_index])
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placement_time = assembly_info[machine_index].placement_time
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regression_time = lr.coef_[0][0] * assembly_info[machine_index].cycle_counter + lr.coef_[0][1] * assembly_info[
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machine_index].nozzle_change_counter + lr.coef_[0][2] * assembly_info[machine_index].pickup_counter + \
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lr.coef_[0][3] * assembly_info[machine_index].pickup_movement + lr.coef_[0][4] * \
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placement_points[machine_index] + lr.intercept_[0]
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print(f'assembly time for machine {machine_index + 1: d}: {placement_time: .3f} s, total placement: '
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f'{placement_points[machine_index]}, total component types {total_component_types: d}', end=', ')
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print(f'regression time: {regression_time: .3f} s')
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standard_deviation_time += pow(placement_time - average_time, 2)
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standard_deviation_time /= machine_number
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standard_deviation_time = math.sqrt(standard_deviation_time)
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print(f'finial assembly time: {max(info.placement_time for info in assembly_info): .3f} s, '
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f'standard deviation: {standard_deviation_time: .3f}')
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@timer_wrapper
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def main():
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warnings.simplefilter(action='ignore', category=FutureWarning)
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# 参数解析
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parser = argparse.ArgumentParser(description='assembly line optimizer implementation')
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parser.add_argument('--filename', default='PCB.txt', type=str, help='load pcb data')
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parser.add_argument('--auto_register', default=1, type=int, help='register the component according the pcb data')
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parser.add_argument('--machine_number', default=3, type=int, help='the number of machine in the assembly line')
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parser.add_argument('--machine_optimizer', default='feeder_scan', type=str, help='optimizer for single machine')
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parser.add_argument('--line_optimizer', default='genetic', type=str, help='optimizer for PCB Assembly Line')
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parser.add_argument('--feeder_limit', default=1, type=int,
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help='the upper feeder limit for each type of component')
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params = parser.parse_args()
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# 结果输出显示所有行和列
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pd.set_option('display.max_columns', None)
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pd.set_option('display.max_rows', None)
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# 加载PCB数据
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pcb_data, component_data, _ = load_data(params.filename, default_feeder_limit=params.feeder_limit,
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cp_auto_register=params.auto_register, load_feeder_data=False) # 加载PCB数据
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optimizer(pcb_data, component_data, params.line_optimizer, params.machine_optimizer, params.machine_number)
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if __name__ == '__main__':
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main()
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