自动控制系统

But distilling tower temperature control is a typic big time-lag system, and the control of it is always a difficult problem in coak producing industry.

但由于氨塔温度控制属于典型的大时滞系统，对这种系统的自动控制一直是焦化生产控制中的一个难题。

The thesis can be divided into five parts as follows: First, the structural characteristics of finned-pipe evaporator are analyzed. After selecting suitable microelement controller, the heat-transfer and mass-transfer processes are analyzed for every microelement under the conditions of dryness, wetness and frostiness. Based on previous equations, some parameters of frostiness are confirmed and the frost-growing model is set up under frost condition. Some hypotheses are postulated and with the help of the equation of mass-conservation, energy-conservation and momentum-conservation, the evaporation model which fits in the dynamic simulation is built, which set a solid foundation for system simulation. Second, the starting and stopping behaviors under disturbed condition are analyzed and calculated by using the dynamic concentrative parameter model, which gives some advice to better prescribe refrigeration system and set theoretic foundation for carrying out automatic control of refrigeration system. Third, the normal running process is analyzed and calculated by means of rational matching theory, which gives some advice on how to better understand the parameter change under steady state and the affection of inlet-parameter on evaporator. Fourth, the simulation software with dynamic characteristic is designed, which can be applied to calculate thernio-parameter of cryogen, air humidity and frost thickness under different initial and boundary conditions, and to carry out dynamic simulation under conditions of dryness, wetness and frostiness, at the same time, to achieve detection and simulation at any stage from starting to stopping.

本文的主要内容如下：1对翅片管蒸发器结构特点进行分析，选取适当的微元控制体，就干、湿和霜工况下对每个微元分别进行传热传质分析，基于经验关系式确定霜的有关参数，对于霜工况下的霜生长建立模型，经适当假设，运用质量守恒、能量守恒和动量守恒方程建立适合动态仿真的蒸发器数学模型，为系统仿真奠定基础； 2对蒸发在大扰动下的开、停机过程，运用动态集中参数模型进行分析和计算，为更好地描述制冷系统运行的全过程奠定基础，同时也为制冷系统实现自动控制提供一定的理论基础； 3对蒸发器正常运行过程，运用动态分布参数和参数间定量耦合的观点来分析和计算，为更好地了解稳态工况下各点参数的变化情况及各入口参数对蒸发器动态特性的影响即蒸发器性能对各参数变化的敏感性； 4编写翅片管蒸发器动态特性仿真计算程序，可以计算不同边界条件和初始条件下的制冷剂热力参数、空气温湿度和霜厚度分布场，实现对翅片管蒸发器在干、湿和霜工况下的动态仿真。

Performance comparison of the condensed water system before and after revolution is analyzed,The papers also introduces the different control methods for Automatic control of deaerator water level and condenser water level.

文章研究对比改造前后的凝结水系统特点，介绍除氧器水位自动控制和凝结器水位自动控制不同方案，并对各方案进行分析对比，介绍了方案的参数调整方法。

Through realizing auto-adjustment of equilibrator inner pressure,this system control hand-wheel force effectively and improve operation capability and aim speed of artillery.

火炮液体气压式平衡机随着温度的变化，平衡机内气体压力变化比较大，常常偏离设计要求气压值，出现手轮力过大的问题，为了解决此种问题，本文研究一种能够自动补偿气压的控制系统，实现平衡机内的压力的自动调整，实现控制手轮力的目，进一步改善了火炮的操作性能，提高火炮的瞄准速度。

According to weld status in our country, auto-welding control technology of saddle-shaped curve is investigated in depth and the auto-welding control system is developed based on the numerical control principle.

针对我国的焊接现状，本文对马鞍型曲线自动焊接控制技术进行了深入的研究，开发了基于数控原理的马鞍型曲线自动焊接控制系统。

The analysis result proves that the design for improvement is more suitable for the design of longitudinal control laws for HALE tailless flying-wing UAV because the autopilot of flight control system is always in-the-loop, it is not necessary to consider the stability augmentation performance of control system such as traditional method.

分析结果表明，由于无人机飞控系统的自动驾驶仪是始终在环的，不必像传统方法一样考虑带有增稳的控制系统的稳定性。因此，改进的设计方法更适合于无尾飞翼式高空长航时无人机巡航状态的纵向飞行控制系统的设计。

Causing the cut and turn-on of control system for the purpose of automatic control and alarm.

的触点相接通控制系统中电路的开关，以达到自动控制和自动报警功能。

JS11 Intelligent Straight-line Beveling Machine and a PG10 glass polishing machine, Its Joint-Link adopts chainless ball bearing construction .smooth transmission, high-precision movement , The controlling system adopts PLC, which can be operated manually or automatically. The human-machine interface displays various parameters, such as the glass thickness, bevel width and angel, remaining thickness, and working speed The convey speed adopts speed adjustment of frequency conversion The machine can grind and clean the rear transmitting plate of itself.

JS11玻璃直线斜边磨边机及PG10璃直线斜边抛光机采用无链条轴承滚动链板结构，传动平稳，运动精度高，控制系统采用PLC控制，可自动、手动转换，人机界面清楚显示玻璃厚度、斜边宽度及角度、剩余玻璃厚度和加工速度等各种参数，参数的输入和修改直观、便捷，自动化程度高，传送速度采用变频调速，能在本机上进行修磨后板，并设有后板自动清洗装置。

For this reason, a constraint satisfaction neural network based on the logical analytic theory of NNs is presented,which is composed of a general need network named a basic network and a coned system which has the adaptability to cope with complex problems.

CSNN体现了生物神经系统中的突触的控制原理，它由一个基本神经网和一个控制系统组成；基本网的作用是提供必要的约束，控制系统的作用不但能使约束成为自适应的，而且依据具体问题能够动态地、自动地删除基本解中的矛盾。

An automatic-shift control system, including hardware and software, has been developed in this paper for the purpose of realizing automatic control of a vehicle equipped with hydromechanical transmission during shifting.

为实现液力机械传动车辆换挡过程的自动控制，研究了自动换挡控制系统的硬件和软件。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。