Optimal assignment of multiple control system eigenvalues with minimum controller norm

2004 ◽  
Vol 121 (2) ◽  
pp. 37-42
Author(s):  
A. Weinmann
Keyword(s):  
Control System ◽  
Optimal Assignment ◽  
Multiple Control ◽  
Controller Norm ◽  
Minimum Controller Norm

Scheduling Strategy of Multiple Semi-Active Controllers With Information on the Disturbance and the Structural Response

2016 ◽  
Author(s):  
Kazuhiko Hiramoto ◽  
Taichi Matsuoka ◽  
Katsuaki Sunakoda
Keyword(s):  
Optimal Control ◽  
Control System ◽  
Active Control ◽  
Structural Response ◽  
Design Parameters ◽  
Control Law ◽  
Control Performance ◽  
Multiple Control ◽  
Control Laws ◽  
Scheduling Strategy

A scheduling strategy of multiple semi-active control laws for various earthquake disturbances is proposed to maximize the control performance. Generally, the semi-active controller for a given structural system is designed as a single control law and the single control law is used for all the forthcoming earthquake disturbances. It means that the general semi-active control should be designed to achieve a certain degree of the control performance for all the assumed disturbances with various time and/or frequency characteristics. Such requirement on the performance robustness becomes a constraint to obtain the optimal control performance. We propose a scheduling strategy of multiple semi-active control laws. Each semi-active control law is designed to achieve the optimal performance for a single earthquake disturbance. Such optimal control laws are scheduled with the available data in the control system. As the scheduling mechanism of the multiple control laws, a command signal generator (CSG) is defined in the control system. An artificial neural network (ANN) is adopted as the CSG. The ANN-based CSG works as an interpolator of the multiple control laws. Design parameters in the CSG are optimized with the genetic algorithm (GA). Simulation study shows the effectiveness of the approach.

The Control System for a Vibration Exciter

2013 ◽  
Vol 198 ◽  
pp. 600-605 ◽  
Author(s):  
Jarosław Konieczny ◽  
Marek Sibielak ◽  
Waldemar Rączka
Keyword(s):  
Control System ◽  
Real Time ◽  
Vibration Exciter ◽  
Parallel Operation ◽  
Control Loop ◽  
Hydraulic Actuator ◽  
Real Time Control ◽  
Multiple Control ◽  
Real Time System ◽  
Time Control

The paper presents the control system for an electro-hydraulic vibration exciter. A vibration exciter is used to carry out kinematic and forced excitations. Such excitations are needed during the static and dynamic examinations of suspension assemblies and their elements, such as damping springs. The most important elements of the exciter are: a hydraulic servo valve, a hydraulic actuator, a control system and a hydraulic supply station. An inductor works in a negative feedback loop. A set point generator and controller are parts of a real-time control system. The authors used a cRIO-9022 industrial computer from National Instruments analogue input and output modules. Apart from supporting I/O modules, the cRIO controller in a real-time system communicates with an FPGA circuit that forms a control loop. The use of an FPGA (Field Programmable Gate Array) allowed for implementing a hardware control loop through a vibration exciter, as well as other control loops used in the research (such as controlling an active executive element). The use of such a system architecture enabled the parallel operation of multiple control threads. The selected structure also allows for flexible selection of the measuring channels, which are essential for system monitoring and data acquisition.

scholarly journals A Multiple Control System for a Non-Linear Object with Uncertainty

2017 ◽  
Vol 6 (55) ◽  
pp. 114 ◽  
Author(s):  
Svetlana Ivanovna Kolesnikova
Keyword(s):  
Control System ◽  
Multiple Control ◽  
Non Linear ◽  
Linear Object

Modeling and Stability Analysis of Multi-Rate Networked Control Systems with Multiple Control Loops

2010 ◽  
Vol 139-141 ◽  
pp. 1827-1833 ◽  
Author(s):  
Dian Ting Liu ◽  
De Jian Zhou ◽  
Yao Ming Liu
Keyword(s):  
Control System ◽  
Networked Control Systems ◽  
Sampling Period ◽  
Networked Control System ◽  
Network Control ◽  
Networked Control ◽  
Control Loop ◽  
Multiple Control ◽  
Control Loops ◽  
Analysis And Design

A kind of multi-input and multi-output network control system with multiple independent control loops is examined in this paper. The controller of each control loop is connected with the sensor and actuator by a network and each control loop has a different sampling period. The whole mathematical model of this kind of networked control system is set up when the maximum network-induced delay is smaller than one sampling period. And the sufficient condition subject to the asymptotic stability of this kind of networked control system is derived based on the theorem for estimation of feature value deduced from perturbation theory. The research results of this paper have significance in the analysis and design of this kind of networked control system or a similar networked control system.

scholarly journals Development and Evaluation of a Rehabilitation Wheelchair with Multiposture Transformation and Smart Control

Complexity ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Wujing Cao ◽  
Hongliu Yu ◽  
Xinyu Wu ◽  
Sujiao Li ◽  
Qiaoling Meng ◽  
...  
Keyword(s):  
Control System ◽  
Lower Limb ◽  
Gait Training ◽  
Practical Significance ◽  
Test Results ◽  
Multiple Control ◽  
Rehabilitation Training ◽  
Limb Rehabilitation ◽  
The Voice ◽  
Lower Limb Rehabilitation

Stroke and other neurological disorders have an effect on mobility which has a significant impact on independence and quality of life. The core rehabilitation requirements for patients with lower limb motor dysfunction are gait training, restand, and mobility. In this work, we introduce a newly developed multifunctional wheelchair that we call “ReChair” and evaluated its performance preliminarily. ReChair seamlessly integrates the mobility, gait training, and multiposture transformation. ReChair driving and multiposture transformation are done using the voice, button, and mobile terminal control. This work describes the functional requirements, mechanical structure, and control system and the overall evaluation of ReChair including the kinematic simulation of the multiposture transformation and passive lower limb rehabilitation training to quantitatively verify the motion capability of ReChair, the voice control system evaluation that shows how the voice recognition system is suitable for home environment, the sensorless speed detection test results that indicate how the wheel speeds measured by sensorless method are appropriate for travelling control, and the passive and balance training test results that show how the lower limb rehabilitation training in daily life by ReChair is convenient. Finally, the experimental results show that ReChair meets the patients’ requirements and has practical significance. It is cost-effective, easy to use, and supports multiple control modes to adapt to different rehabilitation phases.

scholarly journals A Proposal of Multiple Control System based on Real-Time Trial Control and Its Application to Antiskid Braking System

1998 ◽  
Vol 118 (6) ◽  
pp. 897-908
Author(s):  
Masaaki Inaba ◽  
Ikuo Yoshihara ◽  
Hai-Jiao Guo ◽  
Kazuo Nakao ◽  
Kenichi Abe
Keyword(s):  
Control System ◽  
Real Time ◽  
Time Trial ◽  
Multiple Control ◽  
Braking System

Multiple Control System Design for Superconducting Power Supply Based on RST Algorithm

2014 ◽  
Vol 615 ◽  
pp. 356-360
Author(s):  
Min Hui Song ◽  
Jiao Jiao Long ◽  
Xiao Ning Liu
Keyword(s):  
Magnetic Field ◽  
Control System ◽  
High Magnetic Field ◽  
Power Supply ◽  
Current Loop ◽  
Multiple Control ◽  
Chinese Academy Of Sciences ◽  
Superconducting Outsert ◽  
Multiple Controller ◽  
Academy Of Sciences

The power supply for the superconducting outsert of Steady High Magnetic Field Facility (SHMFF) in High Magnetic Field Laboratory of Chinese Academy of Sciences requires very high precision and high stability (10 ppm of 13kA). In this paper, a multiple controller has been developed which is in combination with analogue control in the voltage-loop and digital control (RST algorithm) in the current-loop. The system model and the detailed design and evaluation of the method are all presented. And the simulation and experimental results finally manifests that the output current can follow the reference perfectly (no lagging error, no overshoot), and its precision (<10ppm) and the output voltage fluctuation (<1%) both meet the requirements. Therefore, the proposed control system for the superconducting power supply is proved to be feasible.

scholarly journals Using Load Forecasting to Control Domestic Battery Energy Storage Systems

Energies ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3946
Author(s):  
Juha Koskela ◽  
Antti Mutanen ◽  
Pertti Järventausta
Keyword(s):  
Control System ◽  
Energy Storage ◽  
Storage Systems ◽  
Load Forecasting ◽  
Cost Savings ◽  
Energy Storage Systems ◽  
Multiple Control ◽  
Battery Energy Storage ◽  
Battery Energy Storage Systems ◽  
Battery Energy

The profitability of domestic battery energy storage systems has been poor and this is the main barrier to their general use. It is possible to increase profitability by using multiple control targets. Market price-based electricity contracts and power-based distribution tariffs alongside storage of surplus photovoltaic energy make it possible to have multiple control targets in domestic use. The battery control system needs accurate load forecasting so that its capacity can be utilized in an optimally economical way. This study shows how the accuracy of short-term load forecasting affects cost savings by using batteries. The study was conducted by simulating actual customers’ load profiles with batteries utilized for different control targets. The results of the study show that knowledge of customers’ load profiles (i.e., when high and low peaks happen) is more important that actual forecast accuracy, as measured by error criteria. In many cases, the load forecast based on customers’ historical load data and the outdoor temperature is sufficient to be used in the control system, but in some cases a more accurate forecast can give better cost savings.

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