Papers by Keyword: State Space

Abstract: In order to study the qualitative and quantitative relationship of the configuration characteristics of motion / force transformation (transmission), the dimension and the performance of motion and force, this paper extends the configuration synthesis of mechanical system to the state space method for the integration synthesis of mechanism configuration, scale and performance. By defining the basic function / performance transformation mechanism, extracting the dual state vector of the input and output performance of mechanism unit, discussing the state space property of mechanism combination (system) including mechanism configuration subspace, mechanism dimension subspace, and performance transformation subspace of mechanism motion / force, and investigating the spatial measurement of mechanism motion / force transformation, the measurement model of mechanical system is established. The motion design of mechanical system is transformed into the problem of finding a connected path (or path planning problem) between two given vectors: input and output dual vector. Finally, an actual example is given to show the details.

Abstract: This paper denotes approaches to discrete-continuous process simulation via E-network. It covers principals of discrete-continuous process simulation via E-networks using the scheme of the interaction of static and dynamic components modeling. The construction of discrete-continuous process dynamic models is based on the state space method and is implemented by using E-network.

Abstract: The main purpose of vehicle suspension system is to isolate the vehicle main body from any road geometrical irregularity in order to improve the passengers ride comfort and to maintain good handling stability. The present work aim at designing a control system for an active suspension system to be applied in today’s automotive industries. The design implementation involves construction of a state space model for quarter car with two degree of freedom and a development of full state-feedback controller. The performance of the active suspension system was assessed by comparing it response with that of the passive suspension system. Simulation using Matlab/Simulink environment shows that, even at resonant frequency the active suspension system produces a good dynamic response and a better ride comfort when compared to the passive suspension system.

Abstract: There has been wide interest in the control scheme of the electromagnetic levitation system due to its disadvantages of nonlinearity and open-loop uncertainty. A typical coil-ball levitation system is used in research. The forces of the ball are analyzed and a dynamic model of the whole electromagnetic levitation system is established. Based on the nonlinear state-space model, the coil-ball system is linearized and then a LQR control approach is proposed. Simulation results show that, compared with conventional pole assignment scheme, the electromagnetic levitation system under the proposed control approach gets a better performance, including smaller overshot and faster response.

Abstract: To identify the component failure propagation path in complex systems, a component failure logical model based on DEVS was established by combining the failure logic principle and DEVS formal specification at the next granularity level of component hierarchy. A series of components failure states define a potential hazard. DEVS has modeling advantages of standardized, hierarchical and modular. Basing on its own characteristics,it can be used to study failure logic modeling techniques of complex systems, model and analyse the scene of the accident process. Therefore, the paper describes syntax and semantics of component failure logic and atomic DEVS, focusing on the implementation mechanism of failure logic using DEVS, the establishment of component state space, the trigger mechanism and the corresponding output in order to establish a component failure logical model based on DEVS. At last, a Wheel Brake System is used to verify the applicability and validity of the model.

Abstract: With the development of the monitoring technology in industrial process, it is increasingly important for state recognition of the mechanical devices. By learning from the immune identification process, state space theory is used for state recognition in this paper. In this method, some state spaces are compared by the space affinity which is regarded as the calculated difference between spaces. Take the minimum space affinity as the final recognition index and then its corresponding remark in remark set can be selected. Through the sample analysis, state space theory is proved to be simple, effective and practical, and can improve the accuracy of recognition according to detailed state standard.

Abstract: Supply chain risk produces and develops with the operation of supply chain. Its characteristics are dynamic and conductivity. In recent years, supply chain risk events occur frequently and cause serious consequences. It makes industry and academia pay much attention on conductive effect of supply chain risk. State space method is introduced in estimating of supply chain risk in this paper. The model of supply chain risk based on state space is given. Then we discuss the prediction error of the system.

Abstract: In this paper, we analyze the control effect of the Lyapunov control strategy on the single-phase shunt hybrid active power filter based on the averaged state space model. The control law is derived by constructing an appropriate Lyapunov control function, and the switching signals is obtained through the pulse width modulation (PWM). The simulation results show that the Lyapunov-based control for a single-phase shunt hybrid active filter is of stability feature, and has good harmonic compensation performance. It presents better harmonic elimination compared to the the traditional PI and LQR controller.

Abstract: Apparel supply chain brings many profits and competitive advantage to the node enterprises, and at the same time it brings risk and uncertainty. The increases of supply chain risk and uncertainty causes apparel supply chain reliability problems. In the paper the definition of supply chain reliability is given. Based on the reliability model of node enterprises, the paper builds the supply chain reliability model based on state transfer. The method of state space is introduced to find the solution.

Abstract: In this paper we describe a model of a classic operating system kernel. We start out with an overview of the main components of the kernel and then present an exact definition of each of these components.