Control of Complex Systems

Drouin, M.; Abou-Kandil, Hisham; Mariton, M.

doi:10.1007/978-1-4757-9853-1

Cited by 14 publications

(3 citation statements)

References 33 publications

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“…Decentralized control, on the other hand, using only local information while guaranteeing stability of the entire system is more suitable for this kind of large scale system. There are three types of decentralized control structures: fully-, partially-and hierarchically decentralized control [9] [10] [11]. The methods chosen for controlling Digital Clay come from a modified version of decentralized control and from large scale LED matrix drive concepts.…”

Section: Control Challenges Of Large Numbers Of Unitsmentioning

confidence: 99%

Control Issues of Digital Clay – Massive Hydraulic Actuator Array for Man-machine Communication

Zhu

Huggins

Book

2008

IFAC Proceedings Volumes

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Digital Clay is an NSF funded project for human machine communication through a tangible haptic surface actuated using fluid power. Digital Clay's hardware can be divided into three subsystems: massive-integrated actuator-sensor array, fluidic driving system, and control system. Focus of this paper is the control of some of the special mechanisms of Digital Clay. Specifically, the Fluid Matrix Drive, Capacitive-Coupled Resistive Sensing technology for position feedback and the other control related issues are discussed. Analysis and testing results on these topics are provided based on a 5x5 actuator array prototype. Most of the topics discussed in this paper are widely applicable to other devices as well as Digital Clay.

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Section: Control Challenges Of Large Numbers Of Unitsmentioning

confidence: 99%

Control Issues of Digital Clay – Massive Hydraulic Actuator Array for Man-machine Communication

Zhu

Huggins

Book

2008

IFAC Proceedings Volumes

View full text Add to dashboard Cite

show abstract

“…Decentralized control, on the other hand, using only local information while guaranteeing stability of the entire system is more suitable for this kind of large scale system. There are three types of decentralized control structures: Fully, Partially and hierarchically decentralized control [10]. D. Gavel, and P. Ioannou gave examples of addressing the problem of decentralized control of large-scale systems in the framework of direct model reference adaptive control [11].…”

Section: Imece2004-59743mentioning

confidence: 99%

Practical Structure Design and Control for Digital Clay

Zhu

Book

2004

Dynamic Systems and Control, Parts a and B

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Digital Clay is a proposed novel three-dimensional computer input and output device for surface shape and haptic effects. The device consists of an array of fluidic actuators under the control of valves connected to two pressure reservoirs in a manner ultimately suitable to an implementation in MEMS technology. The challenges to build this device lie in both the kinematical structure design and the control architecture. Though it is proposed to ultimately build the actuators and control valves using MEMS technology, conventional methods are used at the current prototype stage. In this paper, several designs of the practical kinematical structure will be discussed and the proposed control architecture for the Digital Clay will be introduced.

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“…The coordination is handled by the supervisor and the only information transferred to individual control stations is the modified set profiles.where the weight factor afV) defines the priority given to the profile #). Since the weight factors are normally not interactive multiple objective optimization procedure known a priori, they must be evaluated through an n 11 (AV, nir) optimization problem is decomposed into smaller subproblems and a coordination task[3,4]. The decomposition is carried out by expressing the cost function of an individual control station i as…”

mentioning

confidence: 99%

Coordinated profile control of base sheet and coated product properties

Mustonen

Ritala

Proceedings of IEEE International Conference on Control and Applications

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The quality of coated paper is strongly affected by the base sheet. Normally, cross direction controls of the paper machine minimize dry weight, moisture and caliper variations of the base sheet. This strategy does not, however, guarantee optimal CD properties of the final coated product. To optimize the properties of coated paper, the demands of the coating process should be taken into account when planning the controls for the base sheet. The variations in the base paper and final product properties cannot be minimized at the same time. Therefore it is necessary to have a coordinated control that takes into account the effects of the base paper properties on the coated product. The coordination is based on finding a trade-off between the different control criteria. This can be realized by a higher level supervisory system that computes set profiles for the individual control stations according to priorities given by the operator. The potential benefits of coordinated control were examined by simulation. A mill trial was completed to identify the response models needed in simulation. The results show clearly that considerable improvement can be achieved by utilizing coordinated control.

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Control of Complex Systems

Abstract: Llb~a~y of Cong~ess Cataloglng-ln-Publlcatlon Data Droutn, M. Cont~ol of complex systems , methods and technology I M. Drou•n and H. Abou-Kandll and M. Marlten. p. CN. --

Cited by 14 publications

References 33 publications

Control Issues of Digital Clay – Massive Hydraulic Actuator Array for Man-machine Communication

Control Issues of Digital Clay – Massive Hydraulic Actuator Array for Man-machine Communication

Practical Structure Design and Control for Digital Clay

Coordinated profile control of base sheet and coated product properties

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