Unknown Disturbance Estimator Design for Non-Minimum Phase Plants Using Parallel Feed-Forward Model

2013 ◽  
Author(s):  
Yuichi Chida ◽  
Shota Sekiguchi ◽  
Hiroyuki Kobayashi ◽  
Yuichi Ikeda
Keyword(s):  
Design Method ◽  
Minimum Phase ◽  
Parallel Model ◽  
The Real ◽  
Disturbance Estimation ◽  
Virtual Plant ◽  
Estimation Signal ◽  
Unknown Disturbance ◽  
Disturbance Estimator ◽  
Real Plant

A novel design method of an unknown disturbance observer for non-minimum phase plants is proposed in the present paper. In order to improve the estimation performance, we introduce the approach as a virtual augmented plant by adding a parallel model to the non-minimum phase real plant. The parallel model is designed so that the virtual augmented model becomes the minimum phase. Thus, it is possible to design the unknown disturbance estimator for the minimum phase plant but for the non-minimum phase plant. As the result, it is possible to improve the estimation performances. In this case, it is important to clarify the relationship between the unknown disturbance estimation signal for the real plant and the virtual augmented plant. In the present paper, the unknown disturbance estimation signal of the real plant is re-constructed by using the disturbance estimation of the virtual plant. And the parallel model design method is also proposed. The effectiveness of the proposed method is verified by numerical simulations for several mechanical vibration systems. The results show that the proposed method can improve estimation performances in comparison with conventional methods.

730 Unknown Disturbance Estimation of Non-minimum Phase System Using Parallel Model

2012 ◽  
Vol 2012 (0) ◽  
pp. _730-1_-_730-9_
Author(s):  
Hiroyuki KOBAYASHI ◽  
Shota SEKIGUCHI ◽  
Yuichi CHIDA ◽  
Yuichi IKEDA
Keyword(s):  
Phase System ◽  
Minimum Phase ◽  
Parallel Model ◽  
Disturbance Estimation ◽  
Unknown Disturbance

Altitude Controller Design for Quadcopter UAV

2015 ◽  
Vol 74 (1) ◽  
Author(s):  
Muhammad Zaki Mustapa
Keyword(s):  
Real Time ◽  
Attitude Control ◽  
Controller Design ◽  
Design Method ◽  
Time Windows ◽  
The Real ◽  
Data Acquisition Card ◽  
Aerial Vehicle ◽  
Hovering Control ◽  
Real Time Application

This paper discusses on attitude control of a quadcopter unmanned aerial vehicle (UAV) in real time application. Newton-Euler equation is used to derive the model of system and the model characteristic is analyzed. The paper describes the controller design method for the hovering control of UAV automatic vertical take-off system. In order to take-off the quadcopter and stable the altitude, PID controller has been designed. The scope of study is to develop an altitude controller of the vertical take-off as realistic as possible. The quadcopter flight system has nonlinear characteristics. A simulation is conducted to test and analyze the control performance of the quadcopter model. The simulation was conducted by using Mat-lab Simulink. On the other hand, for the real time application, the PCI-1711 data acquisition card is used as an interface for controller design which routes from Simulink to hardware. This study showed the controller designs are implemented and tuned to the real system using Real Time Windows Target approach by Mat-Lab Simulink.

A Design Method for Modified Smith Predictors for Non-Minimum-Phase Time-Delay Plants with Multiple Feedback-Connected Time-Delays

2010 ◽  
Vol 36 ◽  
pp. 253-262 ◽  
Author(s):  
Iwanori Murakami ◽  
Nghia Thi Mai ◽  
Kou Yamada ◽  
Takaaki Hagiwara ◽  
Yoshinori Ando ◽  
...  
Keyword(s):  
Steady State ◽  
Time Delay ◽  
Time Delays ◽  
Large Time ◽  
Design Method ◽  
Smith Predictor ◽  
Minimum Phase ◽  
Effective Time ◽  
Phase Time ◽  
Step Disturbance

In this paper, we examine a design method for modified Smith predictors for non-minimum-phase time-delay plants with multiple feedback-connected time-delays. The Smith predictor is proposed by Smith to overcome time-delay and known as an effective time-delay compensator for a plant with large time-delay. The Smith predictor by Smith cannot be used for plants having an integral mode, because a step disturbance will result in a steady state error. Several papers considered the problem to design modified Smith predictors for unstable plants. However, no paper examines a design method for modified Smith predictors for non-minimum-phase time-delay plants with multiple feedback-connected time-delays. In this paper, we examine a design method for modified Smith predictors for non-minimum-phase time-delay plants with multiple feedback-connected time-delays.

A New Multidimensional Design Method Based on Meta Model Assistance

2017 ◽  
Vol 7 (1) ◽  
pp. 1-18 ◽  
Author(s):  
Nazih Selmoune ◽  
Zaia Alimazighi
Keyword(s):  
Data Warehouse ◽  
Case Studies ◽  
Design Method ◽  
Essential Element ◽  
Design Guidelines ◽  
Data Warehouses ◽  
Multidimensional Model ◽  
Meta Model ◽  
The Real ◽  
Basic Concepts

Data warehouses have become over the last two decades an essential element in the area of economic intelligence. Although the basic concepts related to this technology are now more standardized (multidimensional model, OLAP technology...), the design method issue remains in discussion, since no proposed method does seem attractive enough to be used rigorously in the real case studies. Indeed, most of the 'Data Warehouse projects' simply follow some design guidelines from the most informal methods. In this paper the authors propose an approach based on the use of the sources metadata to provide help in the multidimensional design. Their approach falls into the category of supply-driven methods, and attempts to cover the various stages of the lifecycle of data warehouses design. The proposed method is associated with a MultiDimensional Design Assistance environment (M2DA) to support the automatic and semi-automatic steps, providing the expected forms of assistance, and managing the interaction with the designer.

Disturbance Estimation, Compensation, and Dynamic Shaping: New Approach and an Application to Output Stabilization of Multiple Cooperative Control

2014 ◽  
Vol 137 (1) ◽  
Author(s):  
Sang-Chul Lee ◽  
Kyungmin Jeong ◽  
Hyo-Sung Ahn
Keyword(s):  
Cooperative Control ◽  
Design Method ◽  
External Disturbance ◽  
Experimental Tests ◽  
Consensus Algorithm ◽  
Actual System ◽  
Multiple Systems ◽  
Disturbance Estimation ◽  
Output Stabilization ◽  
Estimation Scheme

This paper introduces a new disturbance estimation scheme, and a possible application to relative output stabilization of multiple systems. Using the proposed disturbance estimation scheme, total unknown external disturbance applied to a plant is estimated and compensated. Moreover, the model difference between an actual system and a desired system is also estimated and compensated. For the purpose of general use of the disturbance estimation scheme as an unknown input observer (UIO), a parameterized design method is given, even for the unstable and nonminimum phase systems. For the relative output stabilization of multiple systems, second-order consensus algorithm is additionally used. A case study, simulations, and experimental tests sequentially validate the proposed estimation and control methods.

scholarly journals SINR- and MI-Based Maximin Robust Waveform Design

Entropy ◽  
2019 ◽  
Vol 21 (1) ◽  
pp. 33 ◽  
Author(s):  
Bin Wang ◽  
Xu Chen ◽  
Fengming Xin ◽  
Xin Song
Keyword(s):  
Parameter Estimation ◽  
Prior Information ◽  
Design Method ◽  
Waveform Design ◽  
Upper And Lower Bounds ◽  
Radar Target ◽  
Worst Case ◽  
The Real ◽  
Target Spectrum ◽  
Real Target

Due to the uncertainties of radar target prior information in the actual scene, the waveform designed based on radar target prior information cannot meet the needs of detection and parameter estimation performance. In this paper, the optimal waveform design techniques under energy constraints for different tasks are considered. To improve the detection performance of radar systems, a novel waveform design method which can maximize the signal-to-interference-plus-noise ratio (SINR) for known and random extended targets is proposed. To improve the performance of parameter estimation, another waveform design method which can maximize the mutual information (MI) between the radar echo and the random-target spectrum response is also considered. Most of the previous waveform design researches assumed that the prior information of the target spectrum is completely known. However, in the actual scene, the real target spectrum cannot be accurately captured. To simulate this scenario, the real target spectrum was assumed to be within an uncertainty range where the upper and lower bounds are known. Then, the SINR- and MI-based maximin robust waveforms were designed, which could optimize the performance under the most unfavorable conditions. The simulation results show that the designed optimal waveforms based on these two criteria are different, which provides useful guidance for waveform energy allocation in different transmission tasks. However, under the constraint of limited energy, we also found that the performance improvement of SINR or MI in the worst case for single targets is less significant than that of multiple targets.

A Study on the Design Method of the Real-Time System Software Based on RTOS

2014 ◽  
Vol 513-517 ◽  
pp. 2487-2491
Author(s):  
Dong Zhao ◽  
Shang Wei Jiang ◽  
Hong Wei Zhao ◽  
Xin Tong Yu
Keyword(s):  
Operating System ◽  
Real Time ◽  
Design Method ◽  
Control Flow ◽  
Functional Requirements ◽  
Time System ◽  
Real Time System ◽  
Real Time Operating System ◽  
The Real ◽  
Structured Analysis

This paper combines the characteristics of real-time embedded systems and the real-time operating system to propose a software engineering method and process which bases on the function structured analysis and task structured design. First in the process of structured analysis based on the Hatley-Pirbhai method, extracting and sorting out the data flow and control flow according to the functional requirements of the system, analyzing and processing the functions of the system, the dependency among the functions and the timing sequence, and then realizing the design of the specific functions of the system, next achieving the structural design through the improving method, it also simplifies the system design processes. At this time, just need to analyze and divide the processing which is obtained from the structural analysis to get the specific task, design the interfaces among the tasks and also every task to get the new design method of the embedded real-time operating system, which also solves hard issue of the traditional method which is the weak extracting and developing iteration in the embedded real-time system.

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