Airdrop is the most important approach for crisis transaction and unexpected events, it is necessary to investigate the flight characteristics of transport aircraft during the dropping process. This paper mainly focus...Airdrop is the most important approach for crisis transaction and unexpected events, it is necessary to investigate the flight characteristics of transport aircraft during the dropping process. This paper mainly focuses on the stability, controllability and model simplification of large aircraft with heavy cargo airdrop. In this process, the primary elements which have impact on force and moment are studied theoretically, the role of cargo mass, moving parameters and other factors on dynamical characteristics have been assessed by simulation and analysis. And then the aircraft model simplification is completed for control system designing in future.All the work above shows that the parameters of cargo moving play a dominant role in flight characteristics and the flight equations can be simplified to reduce the design complexity.展开更多
The control allocation problem of aircraft whose control inputs contain integer constraints is investigated. The control allocation problem is described as an integer programming problem and solved by the cuckoo searc...The control allocation problem of aircraft whose control inputs contain integer constraints is investigated. The control allocation problem is described as an integer programming problem and solved by the cuckoo search algorithm. In order to enhance the search capability of the cuckoo search algorithm, the adaptive detection probability and amplification factor are designed. Finally, the control allocation method based on the proposed improved cuckoo search algorithm is applied to the tracking control problem of the innovative control effector aircraft. The comparative simulation results demonstrate the superiority and effectiveness of the proposed improved cuckoo search algorithm in control allocation of aircraft.展开更多
针对多操纵面飞机存在的气动冗余控制分配问题,提出了一种基于最大方向导数增量(Max Direction Derivative Increment,MDDI)不动点(Fixed-point,FXP)的二次规划优化策略;首先,讨论了基于FXP的二次规划;接着,给出了MDDIFXP算法,通过计算...针对多操纵面飞机存在的气动冗余控制分配问题,提出了一种基于最大方向导数增量(Max Direction Derivative Increment,MDDI)不动点(Fixed-point,FXP)的二次规划优化策略;首先,讨论了基于FXP的二次规划;接着,给出了MDDIFXP算法,通过计算当前迭代点沿各个方向的导数获得MDD,取前一迭代点和当前迭代点在MDD上的迭代增量作为当前迭代点的更新迭代增量;随后,证明了MDDIFXP算法的收敛性;最后,通过对不同控制分配优化方法的仿真验证,表明该改进优化算法MDDIFXP的有效性,以及相比原FXP算法的快速性。展开更多
基金supported by the Fundamental Research Funds for the Central Universities(No.310201401JCQ01010)
文摘Airdrop is the most important approach for crisis transaction and unexpected events, it is necessary to investigate the flight characteristics of transport aircraft during the dropping process. This paper mainly focuses on the stability, controllability and model simplification of large aircraft with heavy cargo airdrop. In this process, the primary elements which have impact on force and moment are studied theoretically, the role of cargo mass, moving parameters and other factors on dynamical characteristics have been assessed by simulation and analysis. And then the aircraft model simplification is completed for control system designing in future.All the work above shows that the parameters of cargo moving play a dominant role in flight characteristics and the flight equations can be simplified to reduce the design complexity.
基金supported by the National Natural Science Foundation of China(61273083 and 61374012)
文摘The control allocation problem of aircraft whose control inputs contain integer constraints is investigated. The control allocation problem is described as an integer programming problem and solved by the cuckoo search algorithm. In order to enhance the search capability of the cuckoo search algorithm, the adaptive detection probability and amplification factor are designed. Finally, the control allocation method based on the proposed improved cuckoo search algorithm is applied to the tracking control problem of the innovative control effector aircraft. The comparative simulation results demonstrate the superiority and effectiveness of the proposed improved cuckoo search algorithm in control allocation of aircraft.
文摘针对多操纵面飞机存在的气动冗余控制分配问题,提出了一种基于最大方向导数增量(Max Direction Derivative Increment,MDDI)不动点(Fixed-point,FXP)的二次规划优化策略;首先,讨论了基于FXP的二次规划;接着,给出了MDDIFXP算法,通过计算当前迭代点沿各个方向的导数获得MDD,取前一迭代点和当前迭代点在MDD上的迭代增量作为当前迭代点的更新迭代增量;随后,证明了MDDIFXP算法的收敛性;最后,通过对不同控制分配优化方法的仿真验证,表明该改进优化算法MDDIFXP的有效性,以及相比原FXP算法的快速性。
