Informatics Publishing Limited

Xiaohuo Li ¹, Chao Wang ¹, Jinghui Zhang ², Wei Du ¹, Shuming Liu ¹

Affiliations
1 College of Mechanical Engineering, Liaoning Technical University, Fuxin, CN
2 Sany Heavy Equipment Co., Ltd, Shenyang, CN

Abstract

By introducing sliding mode predictive control (SMPC) techniques, a controller with passivity of a class of discrete-time uncertain singular systems is proposed in this paper. A new switching surface function is designed by taking the singular matrix into account, thus the resulting sliding mode dynamics is a full-order uncertain singular time-varying delay system. Due to feedback correction and receding horizon optimization, the influence of uncertainty can be compensated in time, strong robustness to matched or unmatched uncertainties is possessed. In addition, chattering of sliding mode control can be eliminated by predictive control method. Simulation result is given to illustrate the validity of the proposed approach.

Keywords

Continuous Miner, Walking System, Fuzzy Neural Network, Fault Diagnosis, GA-PSO, HOFNN.

Full Text

   

Shu Yan ¹, Jianhua Yao ², Ji Li ¹, Xu Zhu ³, Chao Wang ⁴, Wei He ¹, Shizhong Ma ¹

Affiliations
1 Northeast Petroleum University, Fazhan Road 99, Daqing 163 000, CN
2 Daqing Oilfield Sanwei Engineering Inspection Co.Ltd.,Yinhu Road 3, Daqing 163 000, CN
3 No.1 Oil Production Company, Daqing Oilfield Co. Ltd., Zhongqi Road 34, Daqing 163 000, CN
4 No.2 Oil Production Company, Daqing Oilfield Co. Ltd., Qiangxi Road 15, Daqing 163 000, CN

Abstract

Based on the dense well pattern data of PI2a unit of Putaohua oil layer in Sazhong development area of Daqing oilfield as well as modern sediment and outcrop, the paper attempts to determine point bar configuration parameters through a combination of quantitative methods to establish a three-dimensional point bar configuration model. On the basis of this model, the paper proposed a parameter-constrained three-dimensional configuration model of lateral accretion interbeds via spatial translation according to the planar trajectory of interbeds, so as to maximally restore the geological structure and ascertain the anisotropism and residual oil inside point bars. The results show that there are 15 interbeds in the study area with an azimuth of 320° and an obliquity range of 3.5°-13.1°. The interbeds average an interval of 9.5m, and each of them stretches 25m on average. The profile of interbeds is concave, which is slow, steep, slow from the bottom to the top, and the surface takes the shape of crescent. The profile of lateral accretion bodies is characterized by a echelon-like superimposed structure. The interior of point bars shows strong anisotropism due to interbeds, with residual oil being scarce at the bottom, abundant in the middle and extremely abundant at the top. Given the distribution pattern, the paper put forward suggestions for future residual oil potential tapping.

Keywords

Configuration Modelling, Anisotropism, Configuration Model, Configuration Parameter, Point Bar.

Full Text