【摘要】：流體傳動和控制系統(tǒng)在各類機械設(shè)備中占有重要的地位，容錯糾錯技術(shù)是提高流體傳動和控制系統(tǒng)可靠性和安全性的一種有效手段。本文以液壓控制閥的容錯糾錯技術(shù)研究為主線，設(shè)計了具有容錯功能的換向閥和具有糾錯功能的平衡閥的新結(jié)構(gòu)，對上述兩種控制閥的靜態(tài)性能和動態(tài)性能進行了較為深入和系統(tǒng)的分析和研究。 三位四通液壓換向閥是液壓系統(tǒng)中重要的元件，傳統(tǒng)的三位四通換向閥在結(jié)構(gòu)上要么是滑閥結(jié)構(gòu)，要么是轉(zhuǎn)閥結(jié)構(gòu)，當出現(xiàn)故障時，無法繼續(xù)完成正常的換向功能。本文將滑閥與轉(zhuǎn)閥集成到一個閥體結(jié)構(gòu)中，詳細闡述了該閥的結(jié)構(gòu)原理，對其結(jié)構(gòu)進行了具體設(shè)計，分析了該閥實現(xiàn)滑閥功能、轉(zhuǎn)閥功能以及故障發(fā)生后的切換原理。根據(jù)該閥在直線移動和旋轉(zhuǎn)運動兩種工作方式下的數(shù)學模型，分別分析了它們的靜態(tài)特性與動態(tài)特性，結(jié)果表明文中所設(shè)計的換向閥不僅具有較好的靜態(tài)與動態(tài)特性，而且它所具有的容錯功能還可以進一步提高液壓系統(tǒng)的安全性與可靠性。 液壓平衡閥在液壓系統(tǒng)中具有限速與安全的作用，作為一種重要的液壓元件，在現(xiàn)代工程機械中應(yīng)用十分廣泛。傳統(tǒng)的平衡閥在速度控制與安全功能方面存在一定的缺陷，本文在平衡閥結(jié)構(gòu)上進行了創(chuàng)新設(shè)計，一方面將糾錯設(shè)計思想應(yīng)用于設(shè)計，另一方面首次提出具有直接反饋功能的控制活塞結(jié)構(gòu)。結(jié)合該閥的結(jié)構(gòu)原理進行了詳細的結(jié)構(gòu)設(shè)計，闡述了該閥如何實現(xiàn)正常起升功能、保持靜止功能、正常下降功能以及緊急情況的糾錯功能，驗證了設(shè)計的合理性。根據(jù)該閥的數(shù)學模型，分析了它的靜態(tài)特性與動態(tài)特性，結(jié)果表明所設(shè)計的平衡閥不僅具有良好的速度控制功能，而且具有危急狀態(tài)下的糾錯功能，，使液壓系統(tǒng)的安全性得到了顯著提高。 本文進行的液壓控制閥的創(chuàng)新設(shè)計及其容錯糾錯技術(shù)研究，將為液壓系統(tǒng)的容錯糾錯提供一些新的有效的理論、方法與技術(shù)。
[Abstract]:Fluid transmission and control system plays an important role in all kinds of mechanical equipment. Fault tolerance and error correction technology is an effective means to improve the reliability and safety of fluid transmission and control system. Based on the research of fault-tolerant and error-correcting technology of hydraulic control valve, a new structure of reversing valve with fault-tolerant function and balancing valve with error-correcting function is designed in this paper. The static and dynamic performances of the two control valves are analyzed and studied. The three-position four-way hydraulic reversing valve is an important component in the hydraulic system. The traditional three-position four-way directional valve is either a sliding valve structure or a rotary valve structure. When the failure occurs, it can not continue to complete the normal reversing function. In this paper, the sliding valve and the rotary valve are integrated into a valve body structure, the structure principle of the valve is expounded in detail, the structure of the valve is designed in detail, and the function of the sliding valve, the function of the rotary valve and the switching principle after the failure are analyzed. The static and dynamic characteristics of the valve are analyzed according to the mathematical models of the valve under the two working modes of straight line movement and rotating motion. The results show that the directional valve designed in this paper not only has better static and dynamic characteristics, but also has the following characteristics: 1. Moreover, the fault-tolerant function can further improve the safety and reliability of hydraulic system. As an important hydraulic component, hydraulic balancing valve is widely used in modern construction machinery. The traditional balance valve has some defects in speed control and safety function. In this paper, the structure of the balance valve is innovated. On the one hand, the error-correcting design idea is applied to the design. On the other hand, the control piston structure with direct feedback function is proposed for the first time. Combined with the structure principle of the valve, the structure of the valve is designed in detail, and how to realize the normal lifting function, the static function, the normal descent function and the error-correcting function of the emergency situation are expounded, and the rationality of the design is verified. According to the mathematical model of the valve, the static and dynamic characteristics of the valve are analyzed. The results show that the designed balance valve not only has good speed control function, but also has the error correction function in critical state. The safety of hydraulic system has been greatly improved. The innovative design of hydraulic control valve and its fault-tolerant and error-correcting technology in this paper will provide some new and effective theories, methods and techniques for fault-tolerant and error-correcting of hydraulic system.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH137.52

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