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Pole-placement and Inner model tuning methods are discussed finally;(2) For the linear derivative action, several different tracker-differentiators are presented to improve the quality of the derivative signals;(3) A neural network tuning method is given for the nonlinear PID controller which includes the above tracker-differentiator;(4) For the linear integral action, a nonlinear pre-phase integrator is studied in order to decrease the phase delay problem; Simulation results show that the nonlinear PID controller including the pre-phase integrator posseses better performance in both fast and stable property, and strong ability of anti-disturbance;(5) A simple optimal criteria is introduced to optimize the parameters of the nonlinear PID controller based on the pre-phase integrator.

仿真研究表明,由此形成的非线性复合积分PID控制系统,具有快速而平稳的过渡过程和超强的干扰抑制能力;(5)采用物理意义简单明确的目标函数的优化设计方法,对上述非线性PID控制器进行参数整定,达到了满意控制典型工业过程的目的。通过对直线电机伺服系统的仿真研究,表明该种非线性控制器具有同时跟踪多个目标的优越性能。

Cable reel motor torque constant tension which has the characteristics When the load increases in the motor output shaft speed will automatically come down, volume Rao assured when cable tension unchanged. Rao nature of this excellent performance closely integrated with the Volume; Cage used motor hysteresis coupling increases in size, functionality, easy installation, the constant tension similar characteristics, we can under the conditions required output torque. They can pull the cable external circumstances, hysteresis coupling protect cables; using torque motor controller to increase frequency hysteresis couplings Surge part because of the cable reel SCR converter using a new technology operation, smoothing adjustments to the motor terminal voltage, thereby ensuring that the output torque of the motor unchanged. so that the cable can smooth the road with the truck

其中力矩电机电缆卷筒具有恒张力的特点,当负载增加时电机的输出轴转速能自动随之降低,保证电缆卷饶时张力不变,这个优越的性能与卷饶性紧密结合;采用笼型电机加磁滞式联轴器具有体积小,功能全,安装维护方便,近似恒张力等特点,既可以根据工况需要输出力矩,又可以在电缆受外力拉住的情况下,通过磁滞式联轴器保护电缆;而采用力矩控制器加变频电机加磁滞式联轴节的电缆卷筒因其调压部分采用可控硅变流新技术,可以平滑地对电机的端电压进行调节,从而保证了力矩随负载的变化而改变,使电缆能平稳的跟大车的行进。

Characteristic data have been worked out, including the maximum Lyapunov index λ, fractional dimension D, lacunarity Λ and eight energies of various frequency bands. After being normalized, they can function as the characteristic vectors. Then, they are transmitted into an artificial neural network to perform pattern recognition.Starting from the mechanism of ultrasonic generating, initial ultrasonic pulses are calibrated. A stylish discharge source is directly coupled with the ultrasonic sensors, and work out actual discharge magnitude.

利用非线性和非平稳的方法对超声波信号进行了分析处理,对于局部放电模型得到的信号,计算了超声波信号的Lyapunov指数、分维数D、空缺率、小波包分解的8个频带能量,得到了11个特征数据,归一化处理后形成特征向量,由人工神经网络进行识别,实现了对局部放电典型模型的模式识别,显著提高了模式识别的正确率,并分析了传播途径对识别的影响。

The working load of engin e in plowing can be taken for stable and normal random load whose power spectrum peak value is below 2 Hz. The working load of engine in rototilling contains bo th periodic element whose fundamental frequency is rotating speed of the blade s haft and normal random load of which the parts of energy centers in fundamental frequency and others are distributed over wider frequency band.

证实了犁耕作业发动机的载荷可以认为是平稳的正态分布的随机载荷,其功率谱曲线的谱峰在低于2 Hz处;旋耕作业发动机的载荷是兼有随机成分和周期成分的动态载荷,其中周期谐波的基频为刀轴转速,随机成分一部分能量集中于基频以内,部分分布于较宽频率范围。

As a Chinese old saying narrates:"clumsy birds have to start flying early", in my view, the more gifted a designer is, the more early he or she shall start to rise in order not to fall short of his or her born talents. Many ingenious designers make no achievements in the end because of his or her excessive self-contentedness, which is a negative example of another Chinese idiom: Fortune always appreciate a hardworking person.

平稳的心态是做任何事情的关键,中国的一句老话"笨鸟先飞",我觉得越是资质优秀的设计师越应该先飞,不要辜负父母给你的优秀基因,有很多资质聪慧的设计师满足于自身的优势而最终一事无成,还是中国的一句老话"天道酬勤"。

During scrying - one gazes steadily into the scrying surface (feel free to blink or allow your point of focus to wander a bit; this is not a method of self-inflicted torture).

在占卜的过程中-人必平稳的凝视水晶球的表面(稍微放轻松,让你的注意力稍稍发散;这并不是一个折磨本性的方法)。

JIT in automobile industry require a rapid response of automobile accessory enterprise. In order to cover the peak demand and eliminate uncertain factor in production and gain a higher customer satisfaction rate researching of safety stock becomes very important in this industry.

整车厂商JIT要求对上游的汽车配件生产企业快速响应,汽车配件生产企业为了满足整车厂商的突发性需求与消除本企业内部影响生产平稳的一些不确定因素,也是为了取得比较好的客户满意率,因此对安全库存的研究显得极为重要。

JIT in automobile industry require a rapid response of automobile accessory enterprise. In order to cover the peak demand and eliminate uncertain factor in production and gain a higher customer satisfaction rate researching of safety stock becomes very important in this industry.

整车厂商JIT要求对上游的汽车配件生产企业快速响应,汽车配件生产企业为了满意整车厂商的突发性需求与消除本企业内部影响生产平稳的一些不确定因素,也是为了取得比较好的客户满足率,因此对安全库存的研究显得极为重要。

This paper introduced the market development trend of vanadium products(include ferro-vanadium and vanadium oxide).

介绍了钒产品的市场发展趋势,重点从2005年的45万元/t的钒铁历史高价开始分析,到近两年的市场平淡、平稳的原因,并且对从中反射出来的规律进行了总结。

This routine is a series of moves which must be done smoothly to create illusions of knotting the ring on the rope without letting go of the ends of the rope, removing the ring by apparently visibly penetrating through the knot, then finally removing the knot itself from the rope.

这个流程中的所有动作需要快速且平稳的完成,从而产生圆环被粗棉绳牢系的视觉幻象。接着环将从绳结中逃脱,最后绳结也会从棉绳上脱逃。周围吹拂着微风,轻抚着我的头发与手指,穿越夜晚边缘的暗影,直到所有星星沉寂。。。

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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。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。