CN111523224B - 基于粒子群优化算法的无人机应急抢险下的充电管理方法 - Google Patents
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Abstract
Description
技术领域
本发明涉及一种基于粒子群优化算法的无人机应急抢险下的充电管理方法。
背景技术
随着无人机技术和人工智能技术的发展,无人机巡检获得相关电力部门的重视,也是近几年的研究热点。相比传统的人工巡查方式,无人机巡检具有迅速快捷、不受地形环境限制等优点。但无人机巡检续航能力较差,一般小型的无人机电池续航能力为15-30min。在自然灾害(如台风、地震等)发生后,又急需无人机进行高强度、高频次巡检。但电网工作人员在外出巡检时,只能携带一定数量的电池,且无人机电池日常不能满电保存,现有一些车载快速充电装置可实现对无人机电池快速充电,但通常采用快速充电模式对无人机电池充电,不仅会造成电池容量的迅速衰退,损害电池使用寿命,严重还可能使电池报废。因此,如何在应急抢险现场,根据巡检无人机电池使用情况与备用电池充电电流设置,达到无人机电池使用和快速充电损害最小的动态配合,成为了无人机电池应急充电要考虑的关键问题之一。
正如上面所提到的,应急抢险下无人机电池使用和快速充电损害最小的动态配合是在设计灾后巡检无人机应急充电管理系统需要考虑的关键问题之一。在灾后巡检无人机应急充电管理系统的设计中,大多通过牺牲电池使用寿命来实现快速充电,从而满足灾后高强度、高频次的无人机巡检的需要。而在灾备现场,巡检无人机电池的使用是动态变化的,备用电池电量和数量也是动态变化的,若对所有的无人机电池统一采用最高速率充电,将会对电池的损害达到最大化,因此在满足应急抢险下巡检无人机电池供应的同时,实现由快速充电对无人机电池的损害降到最低,这是目前需要解决的一大难点。
发明内容
本发明提供了一种基于粒子群优化算法的无人机应急抢险下的充电管理方法,其克服了背景技术中所述的现有技术的问题。
本发明解决其技术问题所采用的技术方案是:
基于粒子群优化算法的无人机应急抢险下的充电管理方法,
通过式(2)计算得巡检无人机电池剩余续航时间T0i:
式中:Q0i(t)为巡检无人机当前电量,单位为Ah;I0i(t)为电池实时放电电流,单位为A;T0i为巡检无人机电池剩余飞行时间,单位为min;δ为确保无人机巡检的安全性所控制的无人机最低电池剩余容量,SOC为电池当前荷电状态且通过式(2)计算:
式中:Qn(t)为电池充满电后,在一定温度下以恒定电流In放电所能放出的有效电量,Δtn为相应恒流的采集周期;
通过式(3)计算正在充电的备用更换电池预计充满时间Tcj;
式中:Qj为备用更换电池总容量,单位为mAh;Qcj(t)为可直接采集的正在充电的备用更换电池当前电量;K为比例系数;mj为备用更换电池的充电电流,单位为mA;Tc为预计充满时间,单位为min;
建立目标函数式(5),基于粒子群优化算法在满足约束条件式(4)下,求目标函数的最小值,得出备用更换电池的充电电流的最优解;
min(T0i)>min(Tcj) 1≤i≤N,1≤j≤M-N (4)
式中:M为无人机电池总数;N为无人机的总数;
一实施例之中:该δ的取值为5%。
一实施例之中:K的取值范围如表1所示:
表1:
取值条件 | K的取值 |
m<sub>j</sub><Q<sub>n</sub>(t)×5% | 1.6 |
Q<sub>j</sub>×5%≤m<sub>j</sub><Q<sub>j</sub>×10% | 1.5 |
Q<sub>j</sub>×10%≤充电电流<Q<sub>j</sub>×15% | 1.3 |
Q<sub>j</sub>×15%≤充电电流<Q<sub>j</sub>×20% | 1.2 |
Q<sub>j</sub>×20%≤m<sub>j</sub> | 1.1 |
本技术方案与背景技术相比,它具有如下优点:
本发明克服现有应急充电电源管理系统的局限性,基于优化求解的思想,建立了应急抢险下无人机充电电流最优化数学模型,通过巡检无人机远程回传的电量及放电电流,结合抢险所带无人机数量、电池数量、应急充电装置数量及其获取的当前充电电池电量,运用典型的进化算法——粒子群算法对目标函数进行寻优,得到最优的电池充电电流,从而在保证应急抢险下巡检无人机电池供应的同时,实现优化充电方式实现对无人机电池的损害降到最低。
附图说明
下面结合附图和实施例对本发明作进一步说明。
图1为基于粒子群优化算法的无人机应急抢险下的充电管理系统示意图。
具体实施方式
请查阅图1,基于粒子群优化算法的无人机应急抢险下的充电管理方法,
通过式(2)计算得巡检无人机电池剩余续航时间T0i:
式中:Q0i(t)为巡检无人机当前电量,单位为Ah;I0i(t)为电池实时放电电流,单位为A;T0i为巡检无人机电池剩余飞行时间,单位为min;δ为确保无人机巡检的安全性所控制的无人机最低电池剩余容量,SOC为电池当前荷电状态且通过式(2)计算:
式中:Qn(t)为电池充满电后,在一定温度下以恒定电流In放电所能放出的有效电量,Δtn为相应恒流的采集周期;
通过式(3)计算正在充电的备用更换电池预计充满时间Tcj;
式中:Qj为备用更换电池总容量,单位为mAh;Qcj(t)为可直接采集的正在充电的备用更换电池当前电量;K为比例系数;mj为备用更换电池的充电电流,单位为mA;Tc为预计充满时间,单位为min;
建立目标函数式(5),基于粒子群优化算法在满足约束条件式(4)下,求目标函数的最小值,得出备用更换电池的充电电流的最优解;
min(T0i)>min(Tcj) 1≤i≤N,1≤j≤M-N (4)
式中:M为无人机电池总数;N为无人机的总数;
本实施例中,该δ的取值为5%。
优选地,该K的取值范围如表1所示:
表1:
取值条件 | K的取值 |
m<sub>j</sub><Q<sub>n</sub>(t)×5% | 1.6 |
Q<sub>j</sub>×5%≤m<sub>j</sub><Q<sub>j</sub>×10% | 1.5 |
Q<sub>j</sub>×10%≤充电电流<Q<sub>j</sub>×15% | 1.3 |
Q<sub>j</sub>×15%≤充电电流<Q<sub>j</sub>×20% | 1.2 |
Q<sub>j</sub>×20%≤m<sub>j</sub> | 1.1 |
基于上述的方法,本发明实施的粒子群的无人机应急抢险下的充电优化管理技术的具体步骤为:
步骤,1:应急抢险出发时,将所携带的无人机数N、无人机电池数M及其对应的备用更换电池总容量Qj输入智能充电模块中。
步骤2:应急巡检时,正在巡检的无人机将实时电量Q0i(t)和当前放电电流I0i(t)远程回传至智能充电模块,同时智能充电模块采集备用更换电池的当前实际电量Qcj(t)和当前充电电流mj,其中1≤i≤N,1≤j≤M-N;
步骤3:利用SOC估计方法计算公式(2)正在巡检的各无人机剩余续航时间T0i,同时利用公式(3)计算正在充电的备用更换电池所需充满剩余时间Tcj;
步骤41,初始化,初始设置种群大小,随机初始化每个粒子的初始位置x(m1,m2…mM-N)和初始速度v(m1,m2…mM-N);
步骤43,判断是否满足结束条件;若否执行步骤43,若是,则将当前的位置x作为得到的最优解;
步骤43,更新粒子的位置x和速度v,并返回步骤42;
步骤5:输出充电电流最优解mj。
以携带4架无人机、8块无人机电池(其中4块备用替换电池)为例,根据正在巡检的无人机远程回传的当前电量Q0i(t)和当前放电电流I0i(t),其中1≤i≤4,利用SOC估算方法计算得巡检无人机电池剩余续航时间T0i。根据智能充电模块采集的备用替换电池的当前电量Qcj(t)和充电电流mj,其中1≤j≤4,进而估算充电完成时间Tcj。从而将应急抢险下无人机电池使用和快速充电损害最小的动态配合问题转化为了在满足约束条件式(4)下,求目标函数y(式(5))最小值的数学优化模型。
以上所述,仅为本发明较佳实施例而已,故不能依此限定本发明实施的范围,即依本发明专利范围及说明书内容所作的等效变化与修饰,皆应仍属本发明涵盖的范围内。
Claims (3)
1.基于粒子群优化算法的无人机应急抢险下的充电管理方法,其特征在于:
通过式(1)计算得巡检无人机电池剩余续航时间T0i:
式中:Q0i(t)为巡检无人机当前电量,单位为Ah;I0(t)为电池实时放电电流,单位为A;T0i为巡检无人机电池剩余飞行时间,单位为min;δ为确保无人机巡检的安全性所控制的无人机最低电池剩余容量,SOC为电池当前荷电状态且通过式(2)计算:
式中:Qn(t)为电池充满电后,以恒定电流In放电所能放出的有效电量,Δtn为相应恒流的采集周期;
通过式(3)计算正在充电的备用更换电池预计充满时间Tcj;
式中:Qj为备用更换电池总容量,单位为mAh;Qcj(t)为可直接采集的正在充电的备用更换电池当前电量;k为比例系数;mj为备用更换电池的充电电流,单位为mA;Tcj为预计充满时间,单位为min;
建立目标函数式(5),基于粒子群优化算法在满足约束条件式(4)下,求目标函数的最小值,得出备用更换电池的充电电流的最优解;
min(T0i)>min(Tcj) 1≤i≤N,1≤j≤M-N (4)
式中:M为无人机电池总数;N为无人机的总数,i为无人机的编号,j为备用更换电池的编号。
2.根据权利要求1所述的基于粒子群优化算法的无人机应急抢险下的充电管理方法,其特征在于:该δ的取值为5%。
3.根据权利要求1所述的基于粒子群优化算法的无人机应急抢险下的充电管理方法,其特征在于:
表1:
k的取值范围如表1所示。
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