Total Complexity | 6 |
Total Lines | 39 |
Duplicated Lines | 0 % |
Coverage | 100% |
Changes | 1 | ||
Bugs | 0 | Features | 0 |
1 | """Contains things related to calculating velocity.""" |
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6 | 1 | class VelocityCalculator: |
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7 | """Calculate Velocity for single stage. |
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8 | |||
9 | Attributes: |
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10 | current_velocity (list) : list of coordinates of speed for current stage |
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11 | """ |
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12 | |||
13 | 1 | def __init__(self, stage): |
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14 | 1 | self.stage = stage |
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15 | 1 | self.c_1 = 0.5 |
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16 | 1 | self.c_2 = 0.5 |
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17 | 1 | self.w_factor = 0.8 |
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18 | 1 | self.current_velocity = None |
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19 | |||
20 | 1 | def calculate_initial_velocity(self): |
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21 | """Calculate initial velocity.""" |
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22 | 1 | velocity = 0.02 * np.random.rand(len(self.stage.control_params)) - 0.01 |
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23 | 1 | self.current_velocity = velocity |
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24 | 1 | return velocity |
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25 | |||
26 | 1 | def calculate(self, particle_best_position, leader_best_position): |
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27 | """Calculate velocity.""" |
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28 | 1 | velocity = self._s0() + self.c_1 * self._s1( |
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29 | leader_best_position) + self.c_2 * self._s2(particle_best_position) |
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30 | 1 | self.current_velocity = velocity |
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31 | 1 | return velocity |
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32 | |||
33 | 1 | def _s2(self, particle_best_position): |
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34 | 1 | return np.random.rand(len(self.stage.control_params)) * ( |
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35 | np.asarray(particle_best_position) - np.asarray( |
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36 | self.stage.control_params)) |
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37 | |||
38 | 1 | def _s1(self, leader_best_position): |
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39 | 1 | return np.random.rand(len(self.stage.control_params)) * ( |
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40 | np.asarray(leader_best_position) - np.asarray( |
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41 | self.stage.control_params)) |
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42 | |||
43 | 1 | def _s0(self): |
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44 | return self.w_factor * self.current_velocity |
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45 |
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