Adaptive strategy of error anomaly processing in human simulated intelligent control*

Run MA，Qian WU

1School of Automation, Chongqing Industry Polytechnic College, Chongqing 401120, China2School of Computer Science and Engineering, Chongqing University of Technology, Chongqing 400054, China

Adaptive strategy of error anomaly processing in human simulated intelligent control*

Run MA?1，Qian WU2

1SchoolofAutomation,ChongqingIndustryPolytechnicCollege,Chongqing401120,China2SchoolofComputerScienceandEngineering,ChongqingUniversityofTechnology,Chongqing400054,China

Aiming at the puzzle of being possible to result from fault in the switching process of human simulated intelligent multimode control, we explored the adaptive strategy of error anomaly processing in human simulated intelligent control. In the paper, based on the human-machine learning process, it pointed out the causable fault and its produced cause, analyzed the limitation of adaptive function, discussed the adaptive mechanism of error anomaly processing, and proposed the improved modification control algorithm. The experience simulation demonstrated the effectiveness of control strategy. The research result shows that it can cover a wider range application in the switching process of multi-modal control for modified adaptive control algorithm of error anomaly processing.

Adaptive control strategy, Parameter modification, Multi-modal control, Human simulated intelligence control

1.Introduction

The human has accumulated rich experience in the long process of evolution, in which, it also includes the experience of control behavior adaptability on the nature and human society, such as the ability of learning, observation, understanding and knowledge etc, and therefore, intelligence and wisdom of human beings can be said to be endless. Based on online feature identification and process characteristics memory it can abstract the error characteristic model of process. In the bottom layer control, because the process error and its change rate of control process are physically detectable, it can carry on the online feature recognition and characteristics memory for process control, and thereupon then, it summarizes and constructs up the control model and control algorithm based on human simulated intelligence[1-5].

2.Model of human simulated intelligence

The basis thinking of human simulated intelligence based model is that it adopts different control strategies for different pattern of system error characteristics. In the generalized control model as shown in Figure 1,r(t) andy(t) are respectively the input and output of control process, process errore(t)=r(t)-y(t),P(t) is the output of generalized controller.

Figure 1. Generalized control model

The basic control pattern of intelligence model is as follows.

The above two patterns alternately appear in the actual application, and the corresponding relationship of process error signal and control pattern is shown in Figure 2.

Figure 2. Corresponding relationship of error signal and control pattern

The basic control algorithm of human simulated intelligent controller(HISC)is formed by two control patterns, one is P-HD pattern, and the other is HO pattern. The static characteristic is shown in Figure 3, and in which, the 0-asegment corresponds to P-HD pattern and thea-b-c-dsegment corresponds to HO pattern.

Figure 3. Static characteristic and its corresponding input signal

With the continuous piecewise analysis method, it can be summarized as the following mathematical form of expression (1) and expression (2).

(1)

(2)

3.Basic action characteristics of HISC

The expression (1) and (2) in the above clearly expounded the basic action characteristics of HISC.

In which, the characteristic of half-differential control actionPHDchange is shown in Figure 4.

Figure 4. Action process of“half-differential” control strategy

It would be adjusted according to small proportion action, and the controller output is as follow.

When the error obtains a certain initial speed and reduces to the half of peak valueem,n, the passageway of input signaleis cut off, it adopts the open-loop control, and the output of controller keeps a certain value (the size is that it is proportional to the n error extremum algebraic sum before cutting off), namely

The control pattern uses the open-loop control, but it is not fully open-loop HSIC controller, so it is known as the “Half open-loop pattern”, and simplified as “HO pattern”.

4.Adaptive strategy of error anomaly processing

The servo control system based on HISC is shown in Figure 5.

Figure 5. Control system of basic algorithm

In which,nis the switching times from P-HD pattern to HO pattern.

Figure 6. Typical response process under different 0

The first step is to make the recognition for task change or transition process switching. Because the change in any case of system is reflected as the increase of system error, if the system error is always normal attenuation in the process of tracking, the sudden occurrence of abnormal error increased sharply (see Figure 7), after switching at thenthtimes from HO pattern to P-HD pattern, if it appears one of three situations, then it shows that the task variable has been changed.

Figure 7. Sketch map of error anomaly situation

① Error exceeds previous the first opposite sign signal peak valueem,n-1, and it is in the accelerated rise.

② Error exceeds two times of previous the first opposite sign signal peak valueem,n-1.

③ Error exceeds two times of previous the second same sign signal peak valueem,n-2.

Figure 8. Opposite sign of and after task sudden change

Figure 9. More difference in same sign of n-1 and

5.Conclusion

Finally,wecanmakeasummaryforadaptivestrategyoferroranomalyprocessinginhumansimulatedintelligentcontrol.IntheP-HDpattern,ifthereis

Thenitownsthefollowingexpressions.

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仿人智能控制中誤差異常處理的自適應策略*

馬 潤?1，巫 茜2

1.重慶工業職業技術學院 自動化學院，重慶 401120；2.重慶理工大學 計算機科學與工程學院，重慶 400054

針對仿人智能多模態控制切換過程中可能導致的失誤，探討了仿人智能控制中誤差異常處理的自適應策略。基于人—機學習過程，指出了控制中可能導致的失誤及其產生的緣由，分析了自適應功能的局限性，討論了誤差異常處理自適應性的機理，提出了改進的修正控制算法。仿真響應驗證了該控制策略的有效性。結果表明：修正后的誤差異常處理自適應控制算法在多模態控制切換過程中可覆蓋更大范圍的應用。

自適應控制策略；參數修正；多模態控制；仿人智能控制

TP273

2014-03-15

10.3969/j.issn.1001-3881.2014.12.024

*Project supported by Chongqing Education Commission (No: 2012-09-3-314)

? Run MA, E-mail: 258774418@qq.com