Helicopter Safe Landing Trajectory after Main Rotor Actuator Failures
Main rotor actuator failure leads to catastrophic accidents for single main rotor helicopters. This paper focuses on safe landing trajectories after an actuator is locked in place by the remaining actuators, without introducing other control inputs. A general swashplate geometry is described, and ne...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-04-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/10/8/2917 |
| _version_ | 1797569824860143616 |
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| author | Yunjie Wang Chen Jiang Yuwen Zhang Haowen Wang |
| author_facet | Yunjie Wang Chen Jiang Yuwen Zhang Haowen Wang |
| author_sort | Yunjie Wang |
| collection | DOAJ |
| description | Main rotor actuator failure leads to catastrophic accidents for single main rotor helicopters. This paper focuses on safe landing trajectories after an actuator is locked in place by the remaining actuators, without introducing other control inputs. A general swashplate geometry is described, and new reconfiguration solutions for the control mixer are presented. The safe landing trajectories are obtained by formulating a nonlinear optimal control problem based on a nonlinear helicopter dynamic model and geometry constraints due to actuator failure. Safe landing trajectory results are shown with various initial forward velocities of all actuator failure cases. The safe initial speed boundaries are also explored by employing speed sweeps. |
| first_indexed | 2024-03-10T20:17:03Z |
| format | Article |
| id | doaj.art-11753899b0164c8db05e868e11fd6a14 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T20:17:03Z |
| publishDate | 2020-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-11753899b0164c8db05e868e11fd6a142023-11-19T22:27:57ZengMDPI AGApplied Sciences2076-34172020-04-01108291710.3390/app10082917Helicopter Safe Landing Trajectory after Main Rotor Actuator FailuresYunjie Wang0Chen Jiang1Yuwen Zhang2Haowen Wang3School of Aerospace Engineering, Tsinghua University, Tsinghua Yuan No. 1, Beijing 100084, ChinaSchool of Aerospace Engineering, Tsinghua University, Tsinghua Yuan No. 1, Beijing 100084, ChinaSchool of Aerospace Engineering, Tsinghua University, Tsinghua Yuan No. 1, Beijing 100084, ChinaSchool of Aerospace Engineering, Tsinghua University, Tsinghua Yuan No. 1, Beijing 100084, ChinaMain rotor actuator failure leads to catastrophic accidents for single main rotor helicopters. This paper focuses on safe landing trajectories after an actuator is locked in place by the remaining actuators, without introducing other control inputs. A general swashplate geometry is described, and new reconfiguration solutions for the control mixer are presented. The safe landing trajectories are obtained by formulating a nonlinear optimal control problem based on a nonlinear helicopter dynamic model and geometry constraints due to actuator failure. Safe landing trajectory results are shown with various initial forward velocities of all actuator failure cases. The safe initial speed boundaries are also explored by employing speed sweeps.https://www.mdpi.com/2076-3417/10/8/2917helicopter actuator failureoptimal controlsafe landing trajectorycontrol mixer reconfiguration |
| spellingShingle | Yunjie Wang Chen Jiang Yuwen Zhang Haowen Wang Helicopter Safe Landing Trajectory after Main Rotor Actuator Failures Applied Sciences helicopter actuator failure optimal control safe landing trajectory control mixer reconfiguration |
| title | Helicopter Safe Landing Trajectory after Main Rotor Actuator Failures |
| title_full | Helicopter Safe Landing Trajectory after Main Rotor Actuator Failures |
| title_fullStr | Helicopter Safe Landing Trajectory after Main Rotor Actuator Failures |
| title_full_unstemmed | Helicopter Safe Landing Trajectory after Main Rotor Actuator Failures |
| title_short | Helicopter Safe Landing Trajectory after Main Rotor Actuator Failures |
| title_sort | helicopter safe landing trajectory after main rotor actuator failures |
| topic | helicopter actuator failure optimal control safe landing trajectory control mixer reconfiguration |
| url | https://www.mdpi.com/2076-3417/10/8/2917 |
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