动力推进系统变结构控制与双速控制阀优化设计

【作者】 苏颖；

【导师】 王育才；

【作者基本信息】 西北工业大学 ， 武器系统与运用工程， 2001， 硕士

【摘要】 本文在对鱼雷热动力推进系统数学模型分析简化和典型工况仿真研究的基础上，采用变结构等效控制律和趋近律两种方法，直接对非线性系统进行了控制律的综合，设计了鱼雷恒深变速、恒速变深运动的动力推进系统变结构控制器，并进行数字仿真验证。仿真结果表明，应用趋近律法比较用等效控制法设计的变结构控制器控制精度高，抑制抖振效果明显，且该方法物理概念清晰，算法简单、容易实现，从而初步解决了鱼雷热动力推进系统工况控制工程应用中需要妥善解决的问题。此外，本文对燃料泵电液伺服系统变量机构的压力源方案选择问题进行了探讨和研究，提出了从泵后提取压力源的可行方案。 本文的另一个重点是，进行了某型鱼雷动力推进系统速制变换过程工作状态的仿真计算与分析；应用单纯形法对其变速关键部件——双速控制阀进行了优化设计，使系统变速过渡过程的静、动态性能得到明显的改善。 本文应用趋近律法求解变结构控制的方法，达到了良好的抖振削弱效果，使得该控制算法能够应用于实际系统，这在国内尚属首次。该控制方法不仅适合鱼雷动力推进系统的控制，而且对其它工程领域也有着重要的参考价值。更多还原

【Abstract】 Dynamic model is simplified reasonably in this paper, based on the analysis of mathematical model and the simulation of the typical work state of propulsion system of thermal power torpedo. Design methods of variable structure equivalent control laws and approaching laws are both applied to the design of controller of propulsion system, at the work state of constant depth and variable speed, constant speed and variable speed movement of torpedo. Then numerical simulation validation is carried out. The results of simulation show that control method of the later has greater precision than that of the former, and can restrain from the chattering effectively, what抯 more, conception of physics is clear, algorithm is very simple and is easy to implement. So the problem need to be solved well in the engineering application of the control of work state of dynamic propulsion system of torpedo is solved preliminarily. In addition, the problem on how to choose pressure resource of variable structure of electrical-hydraulic servo system of fuel pump is discussed and studied in this paper, and a feasible scheme that the resource of pressure is drawn from the behind of fuel pump is proposed. Another emphasis of this paper is, that simulating calculation and analysis on work state of propulsion system of the certain type of torpedo during the period of the switch between speeds system is carried out, and optimum design of key part---- control valve of both speeds system is conducted by means of simple shape. As a result, performance of static and dynamic state of transient process is improved evidently. In this paper, solving the variable structure controller by means of approaching laws, causes chattering weaken effectively. Therefore, the control algorithm could be applied to practical system, this is innovative work inland. The control method is not only suitable to the system of propulsion of torpedo, but it is of important value of reference for other engineering field.更多还原