无法控制的

To make the engineering machine economize on energy efficiently will spread to move system to carry on a control towards launching machine and, reasonable allotment power, make it be placed in the best work condition;For easing a pilot to labor strength and improvement to manipulate function, need to adopt an automatic control, carry out an engineering machine automation;To complete the homework of high technical ability need intelligence to turn;For the sake of exaltation safety, demand safety control, carry on circulating appearance surveillance, the breakdown reports to the police automatically;Because the construction realm expands, in order not to the personnel arrive can't and not come-at-able place and the very bad place of the homework environment go to homework, need to be adopted long-distance leave remote control and no man to drive a technique.

要使工程机械高效节能，就要对发动机和传动系统进行控制，合理分配功率，使其处于最佳工况；为了减轻驾驶员劳动强度和改善操纵性能，需要采用自动控制，实现工程机械自动化；要完成高技能的作业，就需要智能化；为了提高安全性，需要安全控制，进行运行状态监视，故障自动报警；随着建设领域的扩展，为了避免人员到达无法及不易接近的场所及作业环境十分恶劣的地方去作业，需要采用远距离遥控和无人驾驶技术。

You can't get rid of or avoid the things or people that enrage you, nor can you change them; but you can learn to control your reactions.

你无法摆脱或避免激怒你的事情和人，也无法改变他们，但可以学习控制自己的反应。

This paper has made exposition to the design process of the motor drive electric control circuit and the fluid drive PLC control system in the machine processing control system based on PLC.

继电器控制系统已经无法满足这一需求，迫使人们去寻求一种新的控制系统来取代它。

Servo controller is key part of antenna control system.In some servo controller,classic PID control algorithm is adopted. In order to improve precision of control system,the integral parameter has been turned too big to use because it will cause integral saturation which depress system performance.On the other hand,ISA bus is used to communicate between servo controller and main computer.ISA is low speed interface protocol,it cannot provide more data for complicated real time position control in servo controller.

伺服控制器是天线伺服控制系统的核心环节，经典的PID控制算法在整定时整定出的积分环节参数较大，很容易出现积分饱和，造成控制精度的降低；另一方面伺服系统中伺服控制器与主控计算机通过低速的ISA总线进行通信，无法满足控制器进行复杂的位置控制运算所要求的实时大信息量的数据传输。

Since the OGY method needs stable manifold, it can't be applied in controlling hyperchaos which has no stable manifold.

由于OGY方法的控制需要稳定流形，因此对没有稳定流形的情况，即所谓超混沌情况就无法用它控制。

So considering trafficability of every single wheel isn\'t circumspect.If driving force of wheels are not concerted,it will happen that some wheel sinks and can\'t produce driving force since wheel sinks too deeply.

如果车轮驱动力输出不协调控制，在松软月面前进时很容易因为某一个车轮受力过大而导致下陷过深失去驱动能力，使整个月球车无法前进，所以车轮驱动力的协同控制是月球车在不平月面几何通过性的重要保证。

Therefore, a design scheme via LMI approach is presented in order to improve the system robustness. By using the LMI approach, the attitude controller design is reduced to a convex optimization problem based on the polytopic system. Since there are some degrees of freedom when solving the LMI, it is available to use this kind of freedom to achieve multi-objective control within this framework.

通过仿真发现采用经典控制方法设计的姿态控制系统在飞艇模型参数以及工作条件变化较大时，无法保证良好的控制效果，因此，为了提高系统的鲁棒性，本文采用基于LMI的方法对姿态控制系统进行了设计，并对所设计系统进行了有约束的多目标优化。

The software called Protel99SE for circuited signed is used to develop the hardware of the controller. The hardware includes the power supply Printed Circuit Board, the signal modulation board, the interface board of human %26amp; machine,and the main control board which is the core of this controller.

锅炉的特点，研制开发了基于MCS-51单片机的小型家用燃气锅炉智能控制器，旨在改变城镇居民使用燃煤锅炉集中采暖时所遇到的室内温度不易控制、无法实现智能控制等的不便，减少因燃煤而产生的大气污染，提高天然气的使用率，改进家庭采暖的控制方式，提高采暖的经济性，改善人们的生活设施。

In view of these shortcomings this frequency meter has made the radical innovation in the design its merit is: Uses the core component is the advanced monolithic special-purpose frequency measurement component -- monolithic frequency meter the integration rate is high the volume is small consumes the electricity province function has realized the frequency meter high integration and the microminiaturization; So long as the monolithic frequency meter adds on the crystal oscillator the measuring range choice the frequency demonstrated and so on the very few components then constitute DC to the 10MHz miniature basic frequency measurement electric circuit; But the biggest merit was this frequency meter has realized monolithic frequency meter frequency sampling electric circuit and the monolithic microcomputer three between hardware and the software connection completely caused the frequency measurement measuring range the choice the frequency data survey the sampling as well as the code frontier transformation and the data dump possible monolithic microcomputer software programming automatically to carry on thus has realized the frequency measurement and the sampling work intellectualizes completely causes this system already to be possible to constitute a miniature intelligence to measure rate the instrument core electric circuit independently also might take in the large-scale automatic control or a test system intelligent subsystem.

摘要传统的测频仪器体积很大，耗能量大，主要靠手工操作，而最大的缺点是不可编程，其量程转换、数据测量、采样控制和处理等均不能通过程序指令来进行控制，无法作为一个微型智能子系统与某一大型自动控制或测试系统进行接口。针对这些缺点，本频率计再设计上作了根本的革新，其优点是：所用核心器件是先进的单片专用测频器件——单片频率计，集成度高，体积小，耗电省，功能强，实现了频率计的高度集成化和微型化；单片频率计只要加上晶振、量程选择、频率显示等很晌慰的器件即可构成一个DC至10MHz的微型基本测频电路；而最大的优点则是本频率计完全实现了单片频率计、频率采样与单片微机三者之间的硬件与软件接口，使得测频量程的选择、频率数据的测量、采样以及编码的边境转换和数据的转储均可能过单片微机的软件编程自动进行，从而实现了测频与采样工作的完全智能化，使得本系统既可独立构成一个微型智能测率仪器的核心电路，也可作为大型自动控制或测试系统中的一个智能子系统。关键词高度集成化，单片机，频率计，电路

But there are no acknowledgments either, so a source never knows for sure which packets arrive at the destination.

但是，因为没有回执，所以我们将无法知道资源的去向，此外，该服务没有提供流控制和拥塞控制。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐