A High-Order Load Model and the Control Algorithm for an Aerospace Electro-Hydraulic Actuator
It is difficult to describe precisely, and thus control satisfactorily, the dynamics of an electro-hydraulic actuator to drive a high thrust liquid launcher engine, whose structural resonant frequency is usually low due to its heavy inertia and complicated mass distribution, let alone one to drive a...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-03-01
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| Series: | Actuators |
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| Online Access: | https://www.mdpi.com/2076-0825/10/3/53 |
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| author | Shoujun Zhao Keqin Chen Xiaosha Zhang Yingxin Zhao Guanghui Jing Chuanwei Yin Xue Xiao |
| author_facet | Shoujun Zhao Keqin Chen Xiaosha Zhang Yingxin Zhao Guanghui Jing Chuanwei Yin Xue Xiao |
| author_sort | Shoujun Zhao |
| collection | DOAJ |
| description | It is difficult to describe precisely, and thus control satisfactorily, the dynamics of an electro-hydraulic actuator to drive a high thrust liquid launcher engine, whose structural resonant frequency is usually low due to its heavy inertia and complicated mass distribution, let alone one to drive a heavy kerolox engine with high-order dynamics. By transforming classic control block diagrams, a baseline two-mass-two-spring load model and a normalized actuator-engine system model were developed for understanding the basic physics and methodology, where a fourth-order transfer function is used to model the multi-resonance-frequency engine body outside of the rod position loop, another fourth-order transfer function with two pairs of conjugated zeros and poles to represent the composite hydro-mechanical resonance effect in the closed rod position loop. A sixth-order model was thereafter proposed for even higher dynamics. The model parameters were identified and optimized by a full factor search approach. To meet the stringent specification of static and dynamic performances, it was demonstrated that a notch filter network combined with other controllers is needed since the traditional dynamic pressure feedback (DPF) is difficult to handle the high-order dynamics. The approach has been validated by simulation, experiments and successful flights. The models, analysis, data and insights were elaborated. |
| first_indexed | 2024-03-09T05:05:30Z |
| format | Article |
| id | doaj.art-e289ae86fc4948a1a458b7e5fe3104fc |
| institution | Directory Open Access Journal |
| issn | 2076-0825 |
| language | English |
| last_indexed | 2024-03-09T05:05:30Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Actuators |
| spelling | doaj.art-e289ae86fc4948a1a458b7e5fe3104fc2023-12-03T12:55:18ZengMDPI AGActuators2076-08252021-03-011035310.3390/act10030053A High-Order Load Model and the Control Algorithm for an Aerospace Electro-Hydraulic ActuatorShoujun Zhao0Keqin Chen1Xiaosha Zhang2Yingxin Zhao3Guanghui Jing4Chuanwei Yin5Xue Xiao6Laboratory of Aerospace Servo Actuation and Transmission, China Aerospace Science and Technology Corporation, No.1 South DaHongMen Road, Fengtai District, Beijing 100076, ChinaLaboratory of Aerospace Servo Actuation and Transmission, China Aerospace Science and Technology Corporation, No.1 South DaHongMen Road, Fengtai District, Beijing 100076, ChinaLaboratory of Aerospace Servo Actuation and Transmission, China Aerospace Science and Technology Corporation, No.1 South DaHongMen Road, Fengtai District, Beijing 100076, ChinaLaboratory of Aerospace Servo Actuation and Transmission, China Aerospace Science and Technology Corporation, No.1 South DaHongMen Road, Fengtai District, Beijing 100076, ChinaLaboratory of Aerospace Servo Actuation and Transmission, China Aerospace Science and Technology Corporation, No.1 South DaHongMen Road, Fengtai District, Beijing 100076, ChinaLaboratory of Aerospace Servo Actuation and Transmission, China Aerospace Science and Technology Corporation, No.1 South DaHongMen Road, Fengtai District, Beijing 100076, ChinaLaboratory of Aerospace Servo Actuation and Transmission, China Aerospace Science and Technology Corporation, No.1 South DaHongMen Road, Fengtai District, Beijing 100076, ChinaIt is difficult to describe precisely, and thus control satisfactorily, the dynamics of an electro-hydraulic actuator to drive a high thrust liquid launcher engine, whose structural resonant frequency is usually low due to its heavy inertia and complicated mass distribution, let alone one to drive a heavy kerolox engine with high-order dynamics. By transforming classic control block diagrams, a baseline two-mass-two-spring load model and a normalized actuator-engine system model were developed for understanding the basic physics and methodology, where a fourth-order transfer function is used to model the multi-resonance-frequency engine body outside of the rod position loop, another fourth-order transfer function with two pairs of conjugated zeros and poles to represent the composite hydro-mechanical resonance effect in the closed rod position loop. A sixth-order model was thereafter proposed for even higher dynamics. The model parameters were identified and optimized by a full factor search approach. To meet the stringent specification of static and dynamic performances, it was demonstrated that a notch filter network combined with other controllers is needed since the traditional dynamic pressure feedback (DPF) is difficult to handle the high-order dynamics. The approach has been validated by simulation, experiments and successful flights. The models, analysis, data and insights were elaborated.https://www.mdpi.com/2076-0825/10/3/53control modelcontrol algorithmhigh-orderelectro-hydraulic actuator |
| spellingShingle | Shoujun Zhao Keqin Chen Xiaosha Zhang Yingxin Zhao Guanghui Jing Chuanwei Yin Xue Xiao A High-Order Load Model and the Control Algorithm for an Aerospace Electro-Hydraulic Actuator Actuators control model control algorithm high-order electro-hydraulic actuator |
| title | A High-Order Load Model and the Control Algorithm for an Aerospace Electro-Hydraulic Actuator |
| title_full | A High-Order Load Model and the Control Algorithm for an Aerospace Electro-Hydraulic Actuator |
| title_fullStr | A High-Order Load Model and the Control Algorithm for an Aerospace Electro-Hydraulic Actuator |
| title_full_unstemmed | A High-Order Load Model and the Control Algorithm for an Aerospace Electro-Hydraulic Actuator |
| title_short | A High-Order Load Model and the Control Algorithm for an Aerospace Electro-Hydraulic Actuator |
| title_sort | high order load model and the control algorithm for an aerospace electro hydraulic actuator |
| topic | control model control algorithm high-order electro-hydraulic actuator |
| url | https://www.mdpi.com/2076-0825/10/3/53 |
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