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检索条件"主题词=Control Algorithm"

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Design and Development of a Test Bed with Active Tracking control to Support Gravity Off-loading

Design and Development of a Test Bed with Active Tracking Co...

引用

AIAA Science and Technology (SciTech) Forum and Exposition

作者： Betancur, Yomary A. Memon, M. Wasif Moncayo, Hever Verberne, Johannes Embry Riddle Aeronaut Univ Adv Dynam & Control Res Lab Dept Aerosp Engn Daytona Beach FL 32114 USA

ISBN: (数字)9781624105784

ISBN: (纸本)9781624105784

The development of vehicle technologies accessing extreme outer space environments for exploration missions has become an increased field of interest among researchers. Challenges posed by simulation of gravities and degrees of freedom have limited the improvement of appropriate testing facilities. In light of these issues, this paper presents the designing and building process of a low cost Small Scale Integrated Gravity Off-loading Robotic System (SIGOR) to facilitate the development of advanced guidance, navigation and control algorithms for space-type applications. Evaluation performance of an Active Tracking control system is included in this paper along with description of capabilities and limitations. SIGOR's hardware has been integrated such that its application can easily be extended to the development of a large scale offloading facility.

关键词： State Space Representation control algorithm Vehicle Technology Space Environment Free Body Diagram Active Tracking System Active Response Gravity Offload System Newton's Second Law Full State Feedback Pulse Generator

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Ratio control Strategy for an Electromechanical Continuously Variable Transmission Based on Engine Models

Ratio Control Strategy for an Electromechanical Continuously...

引用

International Conference on Advanced Engineering Materials and Technology (AEMT2011)

作者： Jiang, Qiang Liu, Hongyi Hao, Jianjun Cheng, Yue Northeastern Univ Sch Mech Engn & Automat Shenyang 110004 Liaoning Peoples R China Chongqing Univ Technol Sch Automot Chongqing 400050 Peoples R China

ISBN: (纸本)9783037851937

Electromechanical control CVT (EM-CVT) is a new type of continuously variable transmission, and its ratio quality is an important parameter validated the performance of vehicle. In order to study the dynamical coupling technology between EM-CVT and engine under the running state of vehicle, the special character of two working models is obtained by engine experiment;according to the principle of the EM-CVT, the relation between vehicle speed and ration is theoretically analyzed. Based on the basic theory of PID control, the improved PID control algorithm is proposed for the speed ratio control of the EM-CVT, and experimental verification is made. The experimental results show that there is a significant effect on the system with this algorithm.

关键词： continuously variable transmission control algorithm improved PID speed ratio

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Research on Road Feeling control Strategy for Electric Forklift Steer-by-wire System 11

Research on Road Feeling Control Strategy for Electric Forkl...

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IEEE 11th Conference on Industrial Electronics and Applications (ICIEA)

作者： Xiao, Zuxun Xiao, Benxian Hefei Univ Technol Sch Elect Engn & Automat Hefei Peoples R China

ISBN: (纸本)9781467386449

Based on the model of TFC20 electric forklift, the composition and working principle of the steer by wire (SBW) system is introduced in this paper. And then the relationship between steering handle force characteristics and vehicle speed, the relationship between steering handle force characteristics and steering handle angle, and the relationship between steering handle force characteristics and lateral acceleration are analyzed in this paper. Based on the requirements of steering handle force characteristics, considering not only to let the driver to get the ideal road feeling characteristics and achieve the traditional steering road feeling effect, but also to meet the free design and adjustable characteristics of SBW road feeling, this paper studies and designs the fusion algorithm for road feeling control, a comprehensive road feeling control strategy including main control and auxiliary control, damping control, limit control is proposed based on the direct measurement of steering motor current and vehicle speed, steering handle angle and other state variables. On the basis of the above research, the target current calculation model of the road feeling motor is presented, and the simulation results show that the model can provide the real road conditions and comfortable road feeling for the driver to meet the standard requirements of forklift steering force characteristics.

关键词： electric forklift SBW system force characteristics of steering handle control algorithm road feeling

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Electromagnetic Torque control of an Optimized Flux-Concentrated Transverse Flux Generator

Electromagnetic Torque Control of an Optimized Flux-Concentr...

引用

AIAA SciTech Forum

作者： Nayak, Sandeep Mohan Singh, Jitendra Kothari, Mangal Indian Inst Technol Kanpur Dept Aerosp Engn Kanpur 208016 Uttar Pradesh India Indian Inst Technol Dept Aerosp Engn Powai 400076 Maharashtra India

ISBN: (数字)9781624107115

ISBN: (纸本)9781624107115

This paper proposes a flux concentrated transverse flux generator (FCTFG) for the guided artillery application. The effect of different manufacturing techniques like lamination stamping and solid design is studied initially. The result of the solid structure is found to be better compared to the stamping. Subsequently, the leakage flux of the generator is minimized by doing a parametric simulation on four design variables. The height of the rotor tooth adds reluctance to the invalid flux. Thus, participate in improving the electromagnetic torque. In addition to that, a braking circuit topology is implemented in ANSYS Simplorer to do a closed-loop torque control analysis. Two MOSFETs are connected in an anti-series configuration across the braking resistor to control the electromagnetic braking torque. During rotation, the solid rotor structure develops the eddy current on the surface and reduces the control bandwidth of the FCTFG. The proposed switch acts as a short-circuit and increases the braking torque band by controlling the eddy current effect on the rotor. Finally, the effect of torque control on the optimized model is tested in the virtual platform to justify its reliability.

关键词： Artillery Eddy Current ANSYS Closed Loop Canard Magnetic Flux control algorithm Torque Ripple Range of a Projectile Laminated Structure

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Fast Satellite Circumnavigation via Continuous control

Fast Satellite Circumnavigation via Continuous Control

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AIAA SciTech Forum

作者： Gonzalez, Andres M. Tragesser, Steven Univ Colorado Colorado Springs Mech & Aerosp Engn Dept 1420 Austin Bluffs Pkwy Colorado Springs CO 80918 USA

ISBN: (数字)9781624107115

ISBN: (纸本)9781624107115

For implementation of satellite formation control schemes into real-world systems, analyses must be conducted to determine the effectiveness of certain control algorithms for low-thrust continuous maneuvers. By developing chaser-target models capable of simulating low-thrust maneuvers, the effect of external perturbations acting on the satellite pair can be mitigated. Continuous low-thrust maneuvers also provides capabilities of fast relative circumnavigational time, where the period of the relative orbit is less than that of the inertial orbit. This paper analyzes the effectiveness of open-loop and closed-loop control at mitigating..2 perturbations while simultaneously providing fast relative circumnavigation.

关键词： Satellite Formation Linear Quadratic Regulator Low Thrust Maneuvers control algorithm Orbital Elements Solar Radiation Pressure Nonlinear Dynamics Atmospheric Drag Optimal control Earth

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Design, Implementation and control of a Small-scale UAV Quadrotor 11

Design, Implementation and Control of a Small-scale UAV Quad...

引用

11th World Congress on Intelligent control and Automation

作者： Tang, Yi-Rui Li, Yangmin Ma, Tienan Univ Macau Dept Electromech Engn Zhuhai Macao Peoples R China Tianjin Univ Technol Sch Mech Engn Tianjin 300191 Peoples R China

ISBN: (纸本)9781479958252

This paper presents a systematic approach to developing unmanned aerial vehicle (UAV) quadrotor systems. The system is built up based on a radio-controlled (R/C) quadrotor frame. With the careful selection of onboard hardware components, a physical avionics system is developed to interact with onboard sensors and actuators as well as perform data processing. To realize the control of the quadrotor, the values of control parameters need to be obtained in simulation prior to implementing physical hardware. Therefore, a nonlinear dynamic model is built for designing the controller in simulation. Finally, the developed control laws are performed and evaluated in both simulation and actual flight tests. The experimental results show that the designed quadrotor system exhibits a satisfactory performance and it is competent as an effective tool for conducting the further investigation of UAV research.

关键词： UAV quadrotor hardware components on-board avionics control algorithm

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A Modeling and Attitude control of Robot for Wind Turbines

A Modeling and Attitude Control of Robot for Wind Turbines

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13th International Conference on control, Automation and Systems (ICCAS)

作者： Kong, Jin-Young Kang, Yeon-Sik Han, Kyung-Chul Song, Jin-Seop Sun, Kyung-Ho Cho, Baek-Kyu Kookmin Univ Dept Mech Engn Seoul 136702 South Korea Kookmin Univ Dept Automot Engn Seoul South Korea HYUNDAI KEFICO Dept Prod Dev Res Taejon 437718 South Korea KIMM Dept Proc Dev Res Taejon 305343 South Korea

ISBN: (纸本)9788993215052

Wind turbines are in the limelight in the alternative energy industry. However, they face frequent and various problems during operation. We focused on the Supervising of the blades of a wind turbine. In this paper, we present the design of a maintenance robot that takes the size of wind turbine blades into consideration. So the general form of the robot is a square with four wires fixed to its vertices and to the nacelle. After the robot is placed near the nacelle, it moves along the blades. We also designed an attitude control algorithm for the robot to maintain its balance. Our control algorithm for the robot consists of roll and pitch attitude controllers and a height controller. Each controller was designed independently and then superposed together. We used simulations to verify our control algorithm.

关键词： 5 MW class offshore wind turbine clean manage attitude control design PD control control algorithm

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Power Allocation For Hybrid Electric Aircraft via Optimal control during Climb, Cruise, and Descent

Power Allocation For Hybrid Electric Aircraft via Optimal Co...

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AIAA Science and Technology Forum and Exposition (AIAA SciTech Forum)

作者： Wang, Mengyuan Mesbahi, Mehran Univ Washington Seattle WA 98195 USA

ISBN: (数字)9781624106095

ISBN: (纸本)9781624106095

The demand for energy savings and reducing environmental and noise impact, has lead to an increased interest and rapid development of electrically propelled aircraft technology. However, current battery energy density is a major hindrance to the further development of an all electric aircraft. Hence, designing hybrid electric propulsion systems has become a viable approach to clean aviation in the coming decades, particularly for longer air travel. In this paper, a conceptual ultralight aircraft with an internal combustion engine and an electric motor is examined within its complete flight profile. We formulate the power allocation for a hybrid electric propulsion system as an optimal control problem in order to save fuel consumption and regularize the state of charge of the battery pack. It is shown that the optimal control approach naturally results in operating the engine in its highly efficient region where the fuel consumption rate is low. Another contribution of this work is proposing rule-based control algorithms for hybrid propulsion systems that are derived from the optimal control perspective.

关键词： Hybrid Electric Aircraft Transversality Condition Fuel Consumption Electric Motors Flight Profile Propulsion System Internal Combustion Engines Air Transportation Electric Propulsion control algorithm

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The Application of the Fuzzy Self-adaptive PID controller to the Automatic Operation control of Water Transfer Canal System

The Application of the Fuzzy Self-adaptive PID Controller to...

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2nd International Conference on Intelligent Computation Technology and Automation

作者： Ding, Zhiliang Wang, Changde Tan, Guangming Guan, Guanghua Changjiang Inst Survey Planning Design & Res Wuhan 430010 Peoples R China Wuhan Univ State Key Lab Water Resources & Hydro Engn Sci Wuhan Peoples R China

ISBN: (纸本)9780769538044

The PID controller is widely used in the automatic water conveyance system of canal. However, the conventional PID controller has poor adaptability to canal operating conditions, and along with the variation of canal operating conditions, we must continuously adjust the PID control parameters, it brings some difficulties to the practical operation. And the online self-adapting of PID parameters is also the problem difficult to solve of conventional PID controller, so we combined the fuzzy control with the PID control, designed the fuzzy self-adaptive PID controller, and applied it to the automatic control system of canal operation. When canal operates, according to actual response conditions, the computer uses fuzzy reasoning, and the optimal adjustment of PID parameters can be automatically realized. The simulation results show that this controller can remarkably improve the control effects of canal automatic operation.

关键词： canal automation fuzzy self-adaptive PID controller control algorithm dynamic response simulation

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A Leader-Follower control Strategy Built and Refined using Relational Maneuver Primitives for Approximating Optimal Trajectories in Real-Time

A Leader-Follower Control Strategy Built and Refined using R...

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AIAA SciTech Forum

作者： Gotwald, Carl A. Zollars, Michael D. Reeger, Jonah A. Weintraub, Isaac E. Air Force Inst Technol Dept Aeronaut & Astronaut Wright Patterson AFB OH 45433 USA Air Force Inst Technol Dept Math Wright Patterson AFB OH 45433 USA Air Force Inst Technol Control Sci Ctr Aerosp Syst Directorate Wright Patterson AFB OH 45433 USA

ISBN: (数字)9781624107115

ISBN: (纸本)9781624107115

The work herein presents a new approach to aircraft control within a leader-follower formation, and the refinement process used in its development. During autonomous flight, a follower aircraft is tasked to rejoin and maintain a designated formation position, which is defined dynamically in reference to a maneuvering leader aircraft. Simple control algorithms, named Relational Maneuver Primitives, are intelligently combined into a control strategy such that the autonomous follower aircraft's response approximates the optimal trajectory. This research specifically addresses the control strategy refinement process where a genetic algorithm is implemented to determine the appropriate selection of Relational Maneuver Primitives based on the Time-To-Go between the follower aircraft and the desired goal position. The control strategy takes the form of a lookup table database based on the current state of the follower aircraft which provides the autopilot with the appropriate Relational Maneuver Primitive to use over the next time step. Two test cases are presented which demonstrate a 36% and 48% reduction in error between the follower response trajectory and the follower optimal trajectory when compared to using a single Relational Maneuver Primitive.

关键词： Autopilot Genetic algorithm Aircraft control control algorithm Autonomous Flight True Airspeed Flight Path Angle Optimal control Problem MATLAB Aircraft Trajectory

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