Description: 本文首先建立了航天器姿态动力学及运动学方程，该方程具有较强的非线性特性。通过将状态耦合部分作系统干扰项的处理，使原来的非线性模型转化为线性模型加非线性干扰的形式，从而得到了更加简单明了的姿态控制系统的表达式。
在应用滑模变结构原理对系统进行控制器设计时，首先通过二次型最优法求出了最优滑动面，在此基础上，利用自适应滑模控制原理，设计出了合适的系统控制律。
最后，运用所设计的姿态控制系统对某航天器进行数值仿真，并对仿真结果进行了分析。仿真结果很好地体现出所设计的变结构控制器的优点，并成功地对该航天器姿态进行了控制。
-paper first established the spacecraft attitude dynamics and kinematics equation, the equation has strong nonlinear characteristics. By coupling part of the state system for the disturbance, so the original nonlinear model into a linear model nonlinear increases in the form of interference, and thus a more straightforward attitude control system expression. The application SMVSC tenets of the system controller design, the first through the quadratic optimal method, the optimal sliding surface, on this basis, using adaptive sliding control theory and design a suitable system control law. Finally, using the design of the attitude control system for a spacecraft numerical simulation, and simulation results are analyzed. Simulation results reflect good design of variable structure controller, Platform: |
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Author:跃进 |
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Description: 系统设计原则 根据业务特点和系统目标，确定以下的系统设计原则： 1． 建立大会计的框架结构。所有相关业务的帐务均按照国家会计制度的原则来处理。整个 财政局的主要业务可以认为是一个大的财务体系。 2．实现业务与帐务有机结合。 3．以业务为基础，管理贯穿其中。通过预算及计划控制收入及支出。 4．通过业务数据的采集、统计和分析，指导业务，辅助领导决策。 5．实现业务处理，再考虑优化管理。 6．考虑财政体制的变更对业务处理所带来的影响，系统有足够的适应性。 7．实现对各级财务的监督和管理（下级财政、行政事业单位的财务计划与监督）。 8．实现收入和支出的计划控制。收入的对帐、支出的核准、使用的监督。 9．实现业务处理与政府办公的有机结合。-system design principles based on business characteristics and system goals, determine the following design principles : 1. To establish a framework of the accounting structure. All related business accounts in accordance with state accounting system to handle. Throughout the Board's primary business can be considered a big financial system. 2. Achieving business organically integrated with the Accounts. 3. Business-based management through it all. Adoption of the budget and plans to control income and expenditure. 4. Through operational data collection, statistics and analysis to guide operations, helping to lead the decision-making. 5. Achieving business, consider optimal management. 6. Considering the financial structure of the business process changes brought about by the impact of Platform: |
Size: 17437 |
Author:于 |
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Description: 系统设计原则 根据业务特点和系统目标，确定以下的系统设计原则： 1． 建立大会计的框架结构。所有相关业务的帐务均按照国家会计制度的原则来处理。整个 财政局的主要业务可以认为是一个大的财务体系。 2．实现业务与帐务有机结合。 3．以业务为基础，管理贯穿其中。通过预算及计划控制收入及支出。 4．通过业务数据的采集、统计和分析，指导业务，辅助领导决策。 5．实现业务处理，再考虑优化管理。 6．考虑财政体制的变更对业务处理所带来的影响，系统有足够的适应性。 7．实现对各级财务的监督和管理（下级财政、行政事业单位的财务计划与监督）。 8．实现收入和支出的计划控制。收入的对帐、支出的核准、使用的监督。 9．实现业务处理与政府办公的有机结合。-system design principles based on business characteristics and system goals, determine the following design principles : 1. To establish a framework of the accounting structure. All related business accounts in accordance with state accounting system to handle. Throughout the Board's primary business can be considered a big financial system. 2. Achieving business organically integrated with the Accounts. 3. Business-based management through it all. Adoption of the budget and plans to control income and expenditure. 4. Through operational data collection, statistics and analysis to guide operations, helping to lead the decision-making. 5. Achieving business, consider optimal management. 6. Considering the financial structure of the business process changes brought about by the impact of Platform: |
Size: 17408 |
Author:于 |
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Description: 本文旨在设计电梯控制的优化调度模型。
前期准备阶段通过对第一课室大楼电梯的运行情况和学生使用电梯的情况进行测
量、调查研究，得到建立模型的相关数据。
问题分析和建立模型阶段通过对实际情况作合理假设，将问题归结为：建立电梯优
化调度模型，使师生的不满意度达到最小.-The purpose of this paper the design of elevator control of the optimal scheduling model. The preparatory phase of the first classroom block the operation of elevators and lifts for use by students to conduct survey, investigation and study, get the relevant data for model building. Analysis and model-building stage of the actual situation through reasonable assumptions, the problem boils down to: To establish optimal scheduling model elevator, so that teachers and students are not satisfied with the degree of the smallest. Platform: |
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Author:csc |
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Description: 本文介绍了一种基于单片机的太阳能控制器，系统使用低功耗、高性能的AT89S51单片机作为控制电路的核心器件。此系统由太阳能电池模块，蓄电池，充放电电路，电压采集电路，单片机控制电路和光耦驱动电路组成。设计使用PWM（脉宽调制）控制技术来控制蓄电池充放电，通过控制MOSFET管开启和关闭达到控制电池充放电的目的。实验结果表明，该控制器性能可靠，可以监视太阳能电池和蓄电池电池状态，实现控制蓄电池最优充放电，达到延长蓄电池的使用寿命。-This paper introduces a solar controller based on MCU, AT89S51 chip with low power consumption, high performance of the system as the core device control circuit. This system consists of solar battery module, battery, charging and discharging circuit, voltage acquisition circuit, SCM control circuit and optocoupler drive circuit. Design using PWM (pulse width modulation) control technology to control the battery charge and discharge, by controlling the MOSFET tube open and closed to control the battery charge and discharge of the objective. The experimental results show that, the controller performance is reliable, can monitor the solar cell and battery state of charge and discharge the battery, to achieve optimal control, to prolong the service life of the battery. Platform: |
Size: 522240 |
Author:阿娇 |
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Description: The Bézier curve is one of the most commonly used parametric curves in CAGD and Computer Graphics and has many
good properties for shape design. Developing more convenient techniques for designing and modifying Bézier curve is an im-
portant problem, and is also an important research issue in CAD/CAM and NC technology fields. This work investigates the
optimal shape modification of Bézier curves by geometric constraints. This paper presents a new method by constrained optimi-
zation based on changing the control points of the curves. By this method, the authors modify control points of the original Bézier
curves to satisfy the given constraints and modify the shape of the curves optimally. Practical examples are also given. Platform: |
Size: 239616 |
Author:Joaquin Monleon |
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Description: Embedded applications have emerged appreciably during the past few years
due to the considerable increase of nomad and traveller ways of life. These
itinerant lifestyles induce the apparition and development of more and more
portable and autonomous systems. As a consequence, energy sources, their
corresponding storage devices and power management control systems should
be improved substantially to obtain an optimal and long-lasting working
operation. Consequently, new issues in the quest for longer power autonomy
have appeared recently. Furthermore, embedded products own strict power
supplies design requirements which are becoming more and more critical
with the increasing complexity of the functionalities proposed by these new
portable devices Platform: |
Size: 1887232 |
Author:shankar.m |
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Description: Embedded applications have emerged appreciably during the past few years
due to the considerable increase of nomad and traveller ways of life. These
itinerant lifestyles induce the apparition and development of more and more
portable and autonomous systems. As a consequence, energy sources, their
corresponding storage devices and power management control systems should
be improved substantially to obtain an optimal and long-lasting working
operation. Consequently, new issues in the quest for longer power autonomy
have appeared recently. Furthermore, embedded products own strict power
supplies design requirements which are becoming more and more critical
with the increasing complexity of the functionalities proposed by these new
portable devices Platform: |
Size: 3072 |
Author:shankar.m |
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Description: Abstract—Active harmonic resistor (AHR) has been
proposed to damp the resonance caused by reactive
compensation capacitors and line inductance in
power system. In this paper, a specific
current-controlled method for AHR is proposed
and modeled firstly, and then the design strategy
for AHR optimal resistor value is studied in detail.
Simulation and laboratory experiment results
proved that using this proposed current control
method the AHR impedance characteristics can
simulate a resistor in a wide band and AHR can
suppress the harmonic amplification significantly Platform: |
Size: 961536 |
Author:romi |
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Description: The main contribution of this paper is using
optimal control theory for improving the convergence
rate of backpropagation algorithm. In the proposed
approach, the learning algorithm of backpropagation
is modeled as a minimum time control problem
in which the step-size of its learning factor is considered
as the input of this model. In contrast to the traditional
backpropagation, learning algorithms which
the step-size by trial and error, it is selected
adaptively based on optimal control criterion. The effectiveness
of the proposed algorithm is uated in
two simulations: XOR and 3-bit parity. In both simulation
examples, the proposed algorithm outperforms
well in speed and the ability to escape local minima.-The main contribution of this paper is using
optimal control theory for improving the convergence
rate of backpropagation algorithm. In the proposed
approach, the learning algorithm of backpropagation
is modeled as a minimum time control problem
in which the step-size of its learning factor is considered
as the input of this model. In contrast to the traditional
backpropagation, learning algorithms which
the step-size by trial and error, it is selected
adaptively based on optimal control criterion. The effectiveness
of the proposed algorithm is uated in
two simulations: XOR and 3-bit parity. In both simulation
examples, the proposed algorithm outperforms
well in speed and the ability to escape local minima. Platform: |
Size: 415744 |
Author:samir |
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Search - design by optimal control