Design Procedure Of Control System Research Articles

On the Suppression of Ground Vibration by Active Force Control : 4th Report, On the Hybrid Force Control

For the purpose of suppressing the ground vibration as pollution produced by vibrating machines such as forge hammers, press machines and so on, this paper presents a new active force control method -a hybrid force control method. By using both the characteristic of a low pass filter of an elastic support and that of a high pass filter of an active force control method, the hybrid force control method aims to eliminate the exciting force in all the frequency range. First, this paper proposes a principle of the hybrid force control. Secondly, the fundamental characteristcs of the dynamic compensator are shown. Thirdly, from the viewpoint of phase compensation method, the design procedure of the hybrid force control system is presented, and the effectiveness of this method is clarified. Finally, in order to verify the control effect of the hybrid force control, an experiment is conducted.

On the Suppression of Ground Vibration by Active Force Controller : 2nd Report; Optimurn Design of the Active Force Controlling System

In order to eliminate the ground vibration as pollution, this paper presents a systematic design procedure of the active force control system proposed in the previous papers. First, from the viewpoint of feedback control, the active force control system with a series-type dynamic compensator is constructed. Secondly, with the aid of the parameter optimization technique, the necessary conditions for optimality of the system are derived. Thirdly, for the purpose of solving the conditions described by the nonlinear matrix equations, an iterative algorithm based upon the quasi-Newton method is proposed. Fourthly, by using the design procedure, the active force control system is designed. Finally, the characteristics of the system are discussed and the effectiveness of suppressing the exciting force is compared with the result of the feedforward control method gained in the previous papers.

Continuous time adaptive identification and control algorithms via newly developed adaptive laws

In the first part of this paper, a continuous time adaptive identification algorithm via newly developed adaptive laws is presented. The principle of the algorithm is very simple, nevertheless the convergence property is quite excellent. In the second half part, two continuous time adaptive control algorithms via adaptive laws, as were used for adaptive identification, are presented. A new canonical form for adaptive control is first developed for this purpose. The design procedure for adaptive control systems requires neither positive realness nor augmented error signals and can be applied irrespective of the relative degree of the plant transfer function.

High Pointing Accuracy with a Momentum Bias Attitude Control System

A new design procedure for momentum bias attitude control systems is presented and applied to the design of the roll/yaw control loop for a two-axis momentum storage system. This procedure generates a set of system parameters that results in a prescribed yaw and roll pointing accuracy for a given disturbance torque environment. A breadboard model of the control system has been developed, and hybrid tests of the hardware operating in conjunction with an analog computer have been conducted. Test results demonstrate the high pointing accuracy of the two-axis momentum storage system.

Computer-Aided Design of Adaptive Hydraulic Turbine Governors

The design of the speed control system for a hydroelectric power unit, connected to a local grid is investigated. Manual design methods are limited to very simple process models. If more adequate models are to be need routinely, an interactive computer-aided control system design procedure is necessary. It is designed to adapt the regulator parameters off-line by an efficient frequency domain method and to produce a two-level feedforward self-tuning speed control system.

Modal Control of Two-Dimensional Bending Vibrations : Its Application to Flat Plane Speakers

This paper deals with a concrete design procedure of a two-dimensional model control systems which particularly serves to control the bending vibrations of elastic plates. Besides, the influence of spatial deviations in the driving force distributions upon the system response is considered from the viewpoint of the model domain. The method is applied to the control problem of flat plane speakers, which are suitable to reproduce bass sounds in acoustic systems. Two kinds of control systems for plane speakers are designed taking account of the lower four and nine modes among innumerable eigenmodes which disturb the uniform vibrations of the plates. The dynamic characteristics of the systems are experimentally investigated. The results show the practical usefulness of the method

Power system excitation and governor design using optimal control theory

Abstract Integrated excitation and/or governor control systems are the result of using novel approaches for the selection of stabilizing signals in electric power systems. Such controllers have usually been derived on the basis of a linearized system model, an attractive practical feature of these being that a linear, time-invariant optimal controller may be derived. The power system is non-linear, however, and it is for this non-linear system that an optimal controller is ideally required. Previous work in the area is shown to be deficient in the light of this requirement and subsequently time-invariant integrated controllers suitable for use with the non-linear system are developed. These controllers incorporate model following with integral action and are shown to effect improved control of the nonlinear system over a wide range of operating conditions. The manner in which the proposed control system design procedure may permit the integrated control of large power systems is also of considerable pract...

A design procedure for multivariable control systems

A design procedure for multivariable control systems

パラメータ最適化手法による最適制御理論およびその航空機の最適制御装置設計法への応用

For the design procedure of control system, the method to choose the value of parameters of controller so that the characteristics of the system will pass thle prescribed specification has been generally used, and Root Loci method has been preferred to the design of aircraft controller among many existing design techniques. Such a design method as to derive the closed loop characteristics into the domain of prescribed specifications has a defect that some ambiguity remains in the resulting closed loop system. On the other hand, the notion of optimal control gives us thevery definite design procedure and The PONTRYAGIN's Maximum Principle has contributed much to the design of optimal control system. Although optimal control aims to construct a control system so that some criterion function assumes the minimum value, the strongly damped system usually results from the optimal control technique on the contrary to the expectation of the designer. The reason is such that although the designer has some expectation about the characteristics of the control system to be constructed, he exclusively relies on the result from the optimal control technique without any reference to his expectation.Then the authors has endeavored to solve the optimization problem such that the value of the prescribed criterion function must be the minimum under the constraint that some characteristics of the system to be constructed is given. That kind of problem cannot be solved through Maximum Principle but can be solved only through Parmeter Optimization Method which has been developed by the authors.Parameter optimization technique and the optimal design based on it under the condition that some characteristics of the system to be constructed is prescribed are presented in this paper. How the airplane controller can be designed with satistactory rationality is also presented.

A design procedure for discrete adaptive control systems.

Design synthesis of adaptive control system for linear discrete plants with time varying parameters, noisy measurements and statistical and deterministic disturbances

Magnetic attitude control of a spinning satellite.

Design of a self-contained magnetic attitude control system for a spinning satellite is described, and particular control techniques for sensing and actuation are developed. A specific control problem associated with the alignment of spin axis normal to the orbit plane in the presence of external perturbations is examined in detail, and a simple control system mechanization consisting of a coil and a magnetometer is described. Some of the problems associated with acquisition (control effectiveness when the initial orientation errors are large) are discussed. Finally, a control system design procedure is described with pertinent design parameters for application to a specific satellite system.