变转速负载敏感进出口独立控制系统特性研究

李泽龙; 岳路宏; 杨敬

doi:10.13700/j.bh.1001-5965.2022.0011

变转速负载敏感进出口独立控制系统特性研究

doi: 10.13700/j.bh.1001-5965.2022.0011

太原理工大学机械与运载工程学院，太原 030024

基金项目: 国家重点研发计划(2018YFB2001203)；国家自然科学基金-山西煤基低碳联合基金(U1910211)；山西省重点研发计划(201903D111007)

详细信息

通讯作者:
E-mail：yangjing001@tyut.edu.cn

中图分类号: TH137
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- 被引次数: 0
出版历程
- 收稿日期: 2022-01-11
- 录用日期: 2022-03-18
- 网络出版日期: 2022-05-16
- 整期出版日期: 2023-11-30

Research on characteristics of variable speed load sensitive inlet and outlet independent control system

College of Mechanical and Vehicle Engineering，Taiyuan University of Technology，Taiyuan 030024，China

Funds: National Key R & D Program of China (2018YFB2001203); National Natural Science Foundation of China Shanxi Coal-based Low Carbon Joint Fund (U1910211); Key R & D Program of Shanxi Province (201903D111007)

More Information

Corresponding author: E-mail：yangjing001@tyut.edu.cn

摘要

摘要:
针对泵控位置系统效率高但控制精度不足、阀控位置系统响应快但能耗损失较大的问题，提出了基于模式切换下变转速负载敏感进出口独立的控制系统，设计了针对工程机械中能耗损失大的阻滞型负载工况的控制策略。根据所提控制系统原理，建立变转速负载敏感进出口独立控制系统的数学模型；分别搭建基于加载油缸的变转速负载敏感泵控系统和空载油缸的进出口独立阀控系统的试验平台与AMESim-MATLAB仿真模型并进行分析研究；将所建系统模型中添加正弦和随机信号来模拟变化的负载，分析系统在应对变化的外负载时，位置与压力的控制效果。将所建系统与恒流阀控系统、传统负载敏感阀控系统、传统泵控系统三者进行比较分析，结果表明：所设计变转速负载敏感压力控制器对系统压力的控制效果良好；以伺服电机驱动双作用叶片泵作为动力源的负载敏感进出口独立控制系统的位置控制性能和节能效果高于传统泵控和阀控系统，比传统泵控系统节能10.12%。
- 变转速负载敏感 /
- 进出口独立控制 /
- BODAS控制器 /
- AMESim-MATLAB /
- 模式切换
Abstract:
An independent import and export control was developed, based on variable speed load sensitivity at mode switching, to address the issues of high efficiency but insufficient control precision of the pump control position system and rapid reaction but significant energy loss of the valve control position system. A control strategy is designed for stagnant load conditions with large energy loss in construction machinery. First, a mathematical model of the variable speed load-sensitive independent position control system for the import and export was established, according to the above control principle. Second, the test platform and AMESim-MATLAB simulation model based on the load sensing system of the loaded cylinder and the position control system of the empty cylinder were established and analyzed. Then, sinusoidal and random signals are added to the built system model to simulate varying loads, and the control and pressure of system position accuracy were analyzed under variable load. Finally, the built system was analyzed and compared with a constant current valve control system, traditional load-sensing valve control system, and traditional pump control system. The results show that the designed variable speed load-sensitive pressure controller has a good control effect on system pressure; the position control performance and energy saving effect of the load-sensitive inlet and outlet independent control system with servo motor-driven double-acting vane pump as the power source are higher than those of traditional pump control and valve control systems, which saves the energy by 10.11% over the traditional pump control system.
- variable speed load sensitivity /
- independent meterting system /
- BODAS controller /
- AMESim-MATLAB /
- mode switchin

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图 1 系统控制原理

Figure 1. System control principle

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图 2 变转速负载敏感泵控系统控制原理框图

Figure 2. Control principle block diagram of variable speed load sensitive pump-controlled pressure system

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图 3 变转速负载敏感泵控系统联合仿真

Figure 3. Co-simulation of variable speed load sensitive pump-controlled system

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图 4 变转速负载敏感泵控系统试验平台

Figure 4. Variable speed load sensitive control system test bench

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图 5 泵出口压力与腔室压力

Figure 5. Pump outlet pressure and chamber pressure

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图 6 变化负载下泵出口压与无杆腔压力

Figure 6. Pump outlet pressure and non-rod chamber under varying loads

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图 7 模式切换控制策略

Figure 7. Mode switching control strategy

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图 8 基于模式切换的变转速负载敏感进出口独立阀控系统控制框图

Figure 8. Control frame of variable speed load sensitive inlet and outlet independent control system based on mode switching

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图 9 不同控制参数下目标位移与实际位移

Figure 9. Target displacement and actual displacement under different control parameters

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图 10 基于模式切换的变转速负载敏感进出口独立阀控系统联合仿真

Figure 10. Co-simulation of based on mode switching

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图 11 变转速负载敏感进出口独立阀控系统试验平台

Figure 11. Construction of position control test platform

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图 12 试验与仿真位移曲线和压力曲线

Figure 12. Test and simulation displacement pressure curve

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图 13 正弦负载信号系统特性

Figure 13. System characteristics of sinusoidal load signal

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图 14 随机负载信号系统特性

Figure 14. Random load signal system characteristics

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图 15 本文系统与传统控制系统对比

Figure 15. Comparison between the proposed system and traditional control system

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表 1 试验参数

Table 1. Test parameters

参数	数值
液压缸缸筒直径/mm	280
液压缸活塞直径/mm	220
液压缸活塞行程/mm	200
控制系统伺服电机额定功率/kW	4.5
控制系统伺服电机额定转速/(r·min⁻¹)	1800
控制系统定量叶片泵排量/(ml·r⁻¹)	25
控制系统比例阀额定流量/(L·mm⁻¹)	60
加载系统电机额定功率/kW	15
加载系统电机额定转速/(r·min⁻¹)	1700
加载系统定量叶片泵排量/(ml·r⁻¹)	25

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表 2 控制缸参数

Table 2. Control cylinder parameters mm

工作装置参数	数值
液压缸缸筒直径	80
液压缸活塞直径	45
液压缸活塞行程	480

下载: 导出CSV

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