Process Control

蒸留塔における複数のファンを持つエアクーラ制御の最適化

Simplified Structure Design of Nonlinear Solid Ratio Control in Slurry Mixing Tank

スラリー混合槽の非線形固形分比制御と実装のための簡略化

混合プロセスはプロセス産業において,主要な工程の一つである.混合プロセスでは各成分の均一性,ならびにマテリアルバランス調整すなわち濃度制御が単位操作の要の技術をなす.本論文で取り上げる混合プロセスは,粉体状の固形分と液体を連続的に混合させて,一定濃度のスラリーを作るプロセスである.当該プロセスにおいては,固形分比のみならず調整槽液面も同時に制御する必要がある.両者を制御量として固形分と液体の各供給流量を操作端とする当該プロセスは,相互干渉のある動的非線形特性を持つため,特にスタートアップ時などの …

Process-Identification and Design of Robust PI Controller for a Self-Oscillating Integral Process with Dead Time

This paper proposes a practical method to identify the process dynamics for an integral process with dead-time, under continuous self-excited oscillation. It is assumed that the limit cycle is mainly caused by either the nonlinear property, dead-time …

Process-Identification and Design of Robust PI Controller for a Self-Oscillating Integral Process with Dead Time

This paper proposes a practical method to identify the process dynamics for an integral process with dead-time, under continuous self-excited oscillation. It is assumed that the limit cycle is mainly caused by either the nonlinear property, dead-time …

Simplified Structure Design of Nonlinear Solid Ratio Control in Slurry Mixing Tank

Mixing is a major process in process industries, and uniformity mixture and concentration control are essential in the mixing process. This paper discusses solid ratio control of slurry in a mixing tank. In the …

Sampled-data I-P Controller Design for Integrating Process Based on Model Predictive Control Theory

This paper proposes a practical sampled-data I?P controller design for integrating processes. The controller struc-ture, derived from model predictive control theory, is a simple I?P controller. Application to predictive functional …

モデル予測制御に基づく積分プロセスのサンプルI-P制御設計

モデル予測制御理論に基づいた積分プロセスに対するサンプルI-Pコントローラの設計方法を提案した.導出された本コントローラの構造は比例先行型のI-P制御の単純な形式に帰結した.この方法はPFC(Predictive Functional Control)にも応用可能である.本制御則は,その導出において積分プロセスモデルをモデル予測制御の基本的な形態である1段予測の形式で表現することで得られる.本提案手法ではコントローラの比例項は制御量変化を止め,積分項は目標値への収束速度を決める役割を担う.またパ …

Optimal Tuning Parameters of a PID Controller Based on Reference Trajectory

The tuning of PID controllers is of great importance for process industries because it directly affects productivity, operability, and operating cost. Performance monitoring and maintenance of PID controllers are also serious issues for anyone …

Optimal Tuning Parameters of a PID Controller Based on Reference Trajectory

The tuning of PID controllers is of great importance for process industries because it directly affects productivity, operability, and operating cost. Performance monitoring and maintenance of PID controllers are also serious issues for anyone …