In recent years, many studies on energy-efficient optimization with performance constraint have focused on 'power-performance' assignment in multi-core processors. To find the solution of 'power-performanc...
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This paper presents the dynamic behaviour of a nonlinear single link inverted pendulum-on-cart system based on Lagrange Equation. The nonlinear model linearization was presented based on Taylor series approximation. L...
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ISBN:
(纸本)9781479982523
This paper presents the dynamic behaviour of a nonlinear single link inverted pendulum-on-cart system based on Lagrange Equation. The nonlinear model linearization was presented based on Taylor series approximation. LQR, double-PID and simple pole placement control techniques were proposed for upright stabilization and tracking controls of the system. Simulations results for the various control techniques subjected to a unity magnitude pulse input torque with and without disturbance were compared. The performances of the proposed controllers were investigated based on response time specifications and level of disturbance rejection. Thus, the performance of LQR is more reliable and satisfactory. Finally, future work suggestions were made.
Proportional Integral Derivative (PID) controller is a conventional controller, which is widely used in industrial controlsystem. In this paper, a PID controlsystem is used for path tracking of an autonomous surface...
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ISBN:
(纸本)9781479982523
Proportional Integral Derivative (PID) controller is a conventional controller, which is widely used in industrial controlsystem. In this paper, a PID controlsystem is used for path tracking of an autonomous surface vehicle (ASV). The PID controller is selected because it is easy to implement as an embedded controller and practically easy to understand compared to other control methods. However, to improve the response of the PID controller, a fuzzy inference system (FIS) is used to tune the controller parameters based on a set of control rules. Three parallel fuzzy self-adaptive PID controllers is used to track the desired position and angular orientation of the ASV along the surge, sway and yaw directions. Through kinematic modeling of the ASV, the desired model for tracking the desired path could be obtained. Simulation results show that the Fuzzy-PID controller performs better compared to the ordinary PID controller in term of improving settling time and reducing overshoot of the control signal.
In this paper a search for the trajectory that minimizes the cost function is studied. In robotic studies the cost function can be defined as a function of time, tracking error or applied torque. In this study the cos...
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ISBN:
(纸本)9781479982523
In this paper a search for the trajectory that minimizes the cost function is studied. In robotic studies the cost function can be defined as a function of time, tracking error or applied torque. In this study the cost function is selected as a function of applied torque, so the main aim is minimizing the energy consumption. For this purpose a simple robot manipulator is chosen, and its kinematic and dynamic models are derived by Denavit-Hartenberg convention and Euler-Lagrange method. Then two different trajectory polynomials are described, one is solved from boundary conditions without optimization and one is solved by optimization and the same boundary conditions. These two different trajectory polynomials and their cost functions values are compared. The effect and efficiency of optimization are examined.
This paper addresses an initial study of a modelfree PID tuning based on simultaneous perturbation stochastic approximation (SPSA) for liquid slosh control. The SPSA method is used to optimize the PID parameters such ...
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ISBN:
(纸本)9781479982523
This paper addresses an initial study of a modelfree PID tuning based on simultaneous perturbation stochastic approximation (SPSA) for liquid slosh control. The SPSA method is used to optimize the PID parameters such that the liquid slosh is minimized. In order to validate our model-free design, a liquid slosh model is considered to represent the lateral slosh motion. The simulation results demonstrate that the proposed model-free method has a good potential in reducing the liquid slosh without explicitly modeling the liquid slosh behavior.
In order to make full use of the existing free software in the robot control field, this paper designed a configurable industrial robot real-time module under the environment of RTAI. This paper designed the basic com...
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ISBN:
(纸本)9781479982523
In order to make full use of the existing free software in the robot control field, this paper designed a configurable industrial robot real-time module under the environment of RTAI. This paper designed the basic component model and set the standard ofthe interface between components;the functions of the real-time module were divided into various com ponents, form ing relatively independent parts;and then through changing the configuration files, the real-time module could meet the requirements of users in different conditions. The motion control component, trajectory planning component, PID component and communication component were the most basic functions of industrial robots and formed the framework of the controlsystem. It was improved that the configurable real-time motion control module designed in this paper could easily be invoked by other software, meet the industry requirement and satisfy the various requirements.
This paper presents an application of Second Order Sliding Mode controller (SOSMC) to regulate the vehicle longitudinal slip using Magnetorheological Fluid (MRF) brake as an actuator for the vehicle braking system. A ...
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ISBN:
(纸本)9781479982523
This paper presents an application of Second Order Sliding Mode controller (SOSMC) to regulate the vehicle longitudinal slip using Magnetorheological Fluid (MRF) brake as an actuator for the vehicle braking system. A quarter vehicle with a simple Bingham model is adopted as the control plant and the MRF brake system model respectively. Numerical assessments are conducted for various types of the road surface with the main objective to regulate the longitudinal slip at its optimum friction value. Since the controlsystem is regarded as a highly nonlinear environment, the utilization of SOSMC is considered as decent control solution to cope with the system uncertainties and at the same time reduced the system chattering effect caused by conventional sliding mode control. Results show that the targeted optimum slip reference can be achieved with a smooth input signal compared to conventional SMC.
Autonomous underwater vehicle can perform underwater docking to power up its battery in order to prolong operation thereby reduces maintenance and cost. Prior researches indicate visual servo technique is used for doc...
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ISBN:
(纸本)9781479982523
Autonomous underwater vehicle can perform underwater docking to power up its battery in order to prolong operation thereby reduces maintenance and cost. Prior researches indicate visual servo technique is used for docking operation. Basically, image of markers placed on underwater station is captured and the vehicle surges towards the station. These previous works focuses on deep water environment where the view is uncluttered. It will be a challenging problem if the view has so much information to be processed likewise shallow water which inadvertently reduces the chances of successful docking operation. This paper proposed tracking method using color where the markers were placed in cluttered environment. The method shows a promising result where absolute errors between current captured images and a desired image kept on reducing as the camera closing in on the markers.
The Thermoelectric cooler (TEC) is widely known device which have low coefficient of performance (COP) as compare to the conventional compressed refrigerator. However, it is suitable for portable refrigeration that re...
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ISBN:
(纸本)9781479982523
The Thermoelectric cooler (TEC) is widely known device which have low coefficient of performance (COP) as compare to the conventional compressed refrigerator. However, it is suitable for portable refrigeration that requires light weight, small and fast control. Therefore, the proportional integral derivatives (PID) control was implemented to control input and output while reducing its power consumption. Mathematical model for TEC was develop base on black box model to get its transfer function. The transfer function consist of ratio output and input that been used for analysis during development of controller. This study is focus on performance of PID controller in simulation and real hardware in order to reduce time constrain. The method proposed is integral of time multiplied absolute value of error (ITAE) criteria to determine the coefficient of PID controller. The finding shows that the lowest temperature is 7 DC and the time taken is around 940 second.
As an economical,reliable,easy and safe way to recognize identity,the Voiceprint recognition has a bright prospect in the market at ***,the bad robustness in a noisy environment constraints its practical application,s...
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ISBN:
(纸本)9781467397155
As an economical,reliable,easy and safe way to recognize identity,the Voiceprint recognition has a bright prospect in the market at ***,the bad robustness in a noisy environment constraints its practical application,so the key make voiceprint recognition be applied widely is to improve the robustness of system.A Voiceprint recognition system is mainly made up of signal recognition,feature extraction,model building and matching currently,the study to improve the recognition rate is mainly based the technology just *** paper studied a method to improve the systemrobustness by imp roving the voiceprint *** GMM is text-independent model and used *** order to improve the system recognition rate,this paper improved GMM model during training and recognition period *** training period,a k-means algorithm based on adjacent rules was put forward to obtain initial GM M value,which overcame the flaw that the system employs poor overall performance due to excessive attention on several indicators by the conventional *** increased training speed and recognition rate by virtue of simplifying the derivative process of *** recognition period,in order to avoid the influence of bad frames on the final result,a frame matchingweight method based on entropy was *** experiment result shown that improved GMM model effectively increased the robustness of voiceprint recognition system.
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