液压混合动力起重机复合制动系统研究
发布时间：2019-01-18 20:44
【摘要】：随着全球经济的发展,汽车的产销量及保有量逐年增加,汽车在方便人们生活的同时,也存在制动安全与能量利用效率低的问题。复合制动技术应用在混合动力车辆上,可以回收制动能量提高能量利用效率,同时可以与车辆传统制动系统协同工作完成复合制动,增加制动器的寿命,提高制动可靠性,因此复合制动技术是混合动力车辆研究的一个关键技术。然而复合制动技术应用集中于电混轿车上,对于液混工程车辆的研究较少。起重机整车质量大,经常在城市道路上行驶,制动频繁且能量利用效率低,引入液压混合动力复合制动系统对提高其制动可靠性及能量利用效率有着重要意义。通过阅读混合动力复合制动技术的国内外文献发现,目前大多数的复合制动系统中的能量回收制动子系统只是辅助制动,回收的制动能量有限,并且还存在着制动力矩分配不均匀的问题。本文依托校企合作项目“起重机液压混合动力系统开发”,采用理论分析、仿真研究与实验测试相结合的方式,对并联液压混合动力起重机复合制动系统展开研究。本文的研究内容如下:以液压混合动力起重机为研究平台,基于其复合制动系统的结构形式与工作原理,利用数学模型的方法分析了复合制动系统气、液两个子系统,阐述了二次元件、电气比例阀的控制模型;通过制动过程中起重机的受力分析,建立了其动力学模型。基于以上数学模型,对制动力矩传递进行了数学推导。该部分为制定控制策略和仿真建模奠定了理论基础。以不改变驾驶员操作习惯及制动能量回收最大化为目标,制定了前、后轮制动力矩固定比例分配策略和后轮气、液制动力矩最优能量回收分配策略;基于复合制动系统的控制要求及影响因素,把复合制动系统分成了三种工作模式:紧急制动模式、缓速制动模式和行车制动模式,分别制定了每种模式的控制策略。利用AMESim仿真平台,对复合制动系统中的气、液子系统及控制策略和制动过程中的起重机等进行了仿真建模,经过整合后得到了制动过程中液压混合动力起重机的仿真模型,进行了三种制动模式下的仿真分析,验证了理论分析的正确性和控制策略的合理性。将改造后的液压混合动力起重机作为实验样车,设计了复合制动系统的实验方案。通过对实验样车进行实际测试,得出复合制动技术应用于液压混合动力起重机,可以提高其制动可靠性和能量利用效率。本文的研究内容,对复合制动技术在液压混合动力工程车辆上的应用提供了相关的实际依据,对液压混合动力工程车辆产品的研发具有一定的理论价值和实际意义。
[Abstract]:With the development of the global economy, the production, sales and ownership of automobiles are increasing year by year. While it is convenient for people to live, there are also the problems of braking safety and low efficiency of energy utilization. The application of compound braking technology in hybrid electric vehicle can recover braking energy and improve energy utilization efficiency. At the same time, it can work with traditional braking system to complete compound braking, increase the life of brake and improve braking reliability. Therefore, compound braking technology is a key technology in hybrid vehicle research. However, the application of compound braking technology is concentrated on electric hybrid cars, and the research on hydraulic mixing vehicles is less. The crane has high quality, often travels on urban roads, frequent braking and low energy utilization efficiency. It is of great significance to introduce hydraulic hybrid power compound braking system to improve its braking reliability and energy utilization efficiency. Through reading the domestic and foreign literature of hybrid braking technology, it is found that the energy recovery braking subsystem of most of the composite braking systems is only auxiliary braking, and the braking energy recovered is limited. There is also the problem of uneven distribution of braking torque. Based on the school-enterprise cooperation project "Development of hydraulic hybrid power system of crane", this paper studies the hybrid braking system of parallel hydraulic hybrid crane by means of theoretical analysis, simulation research and experimental test. The research contents of this paper are as follows: based on the structure and working principle of the compound braking system, based on the hydraulic hybrid electric crane as the research platform, this paper analyzes the gas and hydraulic subsystems of the compound braking system by the method of mathematical model. The control model of secondary component and electric proportional valve is described. The dynamic model of crane is established by analyzing the force of crane during braking. Based on the above mathematical model, the transfer of braking torque is derived mathematically. This part lays a theoretical foundation for the formulation of control strategy and simulation modeling. Aiming at not changing the driver's operating habits and maximizing the recovery of braking energy, the fixed proportional distribution strategy of braking torque between front and rear wheels and the optimal energy recovery and distribution strategy of rear wheel gas and hydraulic braking torque are formulated. Based on the control requirements and influencing factors of the compound braking system, the compound braking system is divided into three working modes: emergency braking mode, slow braking mode and driving braking mode, and the control strategies of each mode are worked out respectively. Using the AMESim simulation platform, the simulation modeling of the gas, liquid subsystem, control strategy and crane in the braking process of the compound braking system is carried out, and the simulation model of the hydraulic hybrid electric crane during the braking process is obtained after the integration. The correctness of the theoretical analysis and the reasonableness of the control strategy are verified by the simulation analysis of three braking modes. The experimental scheme of the compound braking system was designed by using the modified hydraulic hybrid crane as the experimental prototype. Through the actual test of the experimental prototype, it is concluded that the application of compound braking technology in hydraulic hybrid electric crane can improve its braking reliability and energy utilization efficiency. The research content of this paper provides the relevant practical basis for the application of the compound braking technology in the hydraulic hybrid electric engineering vehicle, and has certain theoretical value and practical significance for the research and development of the hydraulic hybrid electric engineering vehicle product.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH21
[Abstract]:With the development of the global economy, the production, sales and ownership of automobiles are increasing year by year. While it is convenient for people to live, there are also the problems of braking safety and low efficiency of energy utilization. The application of compound braking technology in hybrid electric vehicle can recover braking energy and improve energy utilization efficiency. At the same time, it can work with traditional braking system to complete compound braking, increase the life of brake and improve braking reliability. Therefore, compound braking technology is a key technology in hybrid vehicle research. However, the application of compound braking technology is concentrated on electric hybrid cars, and the research on hydraulic mixing vehicles is less. The crane has high quality, often travels on urban roads, frequent braking and low energy utilization efficiency. It is of great significance to introduce hydraulic hybrid power compound braking system to improve its braking reliability and energy utilization efficiency. Through reading the domestic and foreign literature of hybrid braking technology, it is found that the energy recovery braking subsystem of most of the composite braking systems is only auxiliary braking, and the braking energy recovered is limited. There is also the problem of uneven distribution of braking torque. Based on the school-enterprise cooperation project "Development of hydraulic hybrid power system of crane", this paper studies the hybrid braking system of parallel hydraulic hybrid crane by means of theoretical analysis, simulation research and experimental test. The research contents of this paper are as follows: based on the structure and working principle of the compound braking system, based on the hydraulic hybrid electric crane as the research platform, this paper analyzes the gas and hydraulic subsystems of the compound braking system by the method of mathematical model. The control model of secondary component and electric proportional valve is described. The dynamic model of crane is established by analyzing the force of crane during braking. Based on the above mathematical model, the transfer of braking torque is derived mathematically. This part lays a theoretical foundation for the formulation of control strategy and simulation modeling. Aiming at not changing the driver's operating habits and maximizing the recovery of braking energy, the fixed proportional distribution strategy of braking torque between front and rear wheels and the optimal energy recovery and distribution strategy of rear wheel gas and hydraulic braking torque are formulated. Based on the control requirements and influencing factors of the compound braking system, the compound braking system is divided into three working modes: emergency braking mode, slow braking mode and driving braking mode, and the control strategies of each mode are worked out respectively. Using the AMESim simulation platform, the simulation modeling of the gas, liquid subsystem, control strategy and crane in the braking process of the compound braking system is carried out, and the simulation model of the hydraulic hybrid electric crane during the braking process is obtained after the integration. The correctness of the theoretical analysis and the reasonableness of the control strategy are verified by the simulation analysis of three braking modes. The experimental scheme of the compound braking system was designed by using the modified hydraulic hybrid crane as the experimental prototype. Through the actual test of the experimental prototype, it is concluded that the application of compound braking technology in hydraulic hybrid electric crane can improve its braking reliability and energy utilization efficiency. The research content of this paper provides the relevant practical basis for the application of the compound braking technology in the hydraulic hybrid electric engineering vehicle, and has certain theoretical value and practical significance for the research and development of the hydraulic hybrid electric engineering vehicle product.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH21
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