• Title/Summary/Keyword: Propulsion Controller

Search Result 164, Processing Time 0.029 seconds

Control Design of the High Performance Nozzle System(Jet Vane Type) (추력방향제어 시스템 Controller)

  • 이명준;김성진
    • Proceedings of the Korean Society of Propulsion Engineers Conference
    • /
    • 1998.04a
    • /
    • pp.24-24
    • /
    • 1998
  • 미사일의 수직 발사 시스템은 수송 및 발사에 필요한 공간을 작게 차지하고 간편하여 각국이 선호하고 있다. 그러나 미사일이 수직발사 초기에는 매우 낮은 속도로 상승하므로 미사일의 방향조정용 Fin의 공력이 발생하지 않기 때문에 초기에 Jet Vane 등의 기계장치를 이용 추력의 방향을 제어하여 마사일의 방향을 목표로 향하도록 하는 Controller가 필요하게 된다. 본 Controller는 DC Motor와 감속기를 이용하여 Vane을 제어 할 수 있도록 설계되어 있으며 1차적으로는 지상 시험용 Controller를 개발 완료된 상태에 있다. 추후 실제 사용하기 위한 Controller를 만들기 위해서는 Main 유도장치와의 상호 Interface 관계를 고려하여 설계되어야 하며 소량 경량화 및 충분한 신뢰성을 갖춘 Controller를 개발하여야 한다.

  • PDF

A Study on HILS Test Modeling and Simulation for Telegraph Controller Verification (Telegraph 제어기 검증을 위한 HILS 테스트 모델링 및 시뮬레이션 연구)

  • Kim, Sung-Dong;Kim, Nam-Ho
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.25 no.11
    • /
    • pp.1612-1618
    • /
    • 2021
  • The telegraph controller is a device used to control the speed of a ship, and it is a device that has a very direct effect on the safety of the crew. Accordingly, ship owners demand very high reliability of the telegraph controller, and the classification trend is to introduce HILS (hardware in loop system) test as a method to verify reliability. Therefore, in this paper, an electric propulsion ship was modeled to perform the HILS test of the Telegraph controller. For modeling, the specifications of the electric propulsion tug boat were defined, and the battery parts, propulsion motor parts, and ship model parts were modeled. In addition, various operation scenarios were defined and the Telegraph controller was modeled accordingly. Finally, the results of the integrated model were confirmed through simulation.

Design of Levitation and Propulsion Controller for Magnetic Levitated Logistic Transportation System (자기부상 물류이송시스템의 부상 및 추진제어기 설계)

  • Choi, Dae-Gyu;Kim, Yong-Tae
    • Journal of the Korean Institute of Intelligent Systems
    • /
    • v.27 no.2
    • /
    • pp.106-112
    • /
    • 2017
  • In the paper, we propose a levitation and a propulsion controller for the magnetic levitation logistic transportation system. The levitation controller is designed considering the mutual influence of the electromagnets to minimize roll and pitch movements. In order to solve the structural disadvantages of the magnetic levitation transportation system, we improve the problem of the existing controller by applying the exponential filter to the reference input. DSP-based control hardware is developed and the levitation control method is verified by levitation experiments to the air gap goal. The propulsion controller uses the space vector voltage modulation method. The propulsion controller is designed to follow the position and velocity profile by detecting the absolute position from the bar code information attached to the rail. The position control result shows satisfactory performance through the propulsion control reciprocating motion experiment.

Control of pressure and thrust for a variable thrust solid propulsion system using linearization (선형화 기법을 이용한 가변추력 고체추진 기관의 압력 및 추력 제어)

  • Kim, Young-Seok;Cha, Ji-Hyeong;Ko, Sang-Ho
    • Proceedings of the Korean Society of Propulsion Engineers Conference
    • /
    • 2011.04a
    • /
    • pp.167-174
    • /
    • 2011
  • Solid propulsion systems have simple structures compared to other propulsion systems and are suitable to long-term storage. However the systems generally have limits on control of thrust levels. In this paper we suggest control algorithms for combustion chamber pressure of variable thrust solid propulsion systems using special nozzles such as pintle valve. For this we use a simple pressure change model by considering only mass conservation within the combustion chamber, design a classical algorithm and also a nonlinear controller using feedback linearization technique. Derived thrust equation and designe a thrust control model. We design the proportion-integral controller for linearizing about operating point. We also demonstrate the performance of controller model through numerical simulations.

  • PDF

Design of Adaptive Neural Tracking Controller for Pod Propulsion Unmanned Vessel Subject to Unknown Dynamics

  • Mu, Dong-Dong;Wang, Guo-Feng;Fan, Yun-Sheng
    • Journal of Electrical Engineering and Technology
    • /
    • v.12 no.6
    • /
    • pp.2365-2377
    • /
    • 2017
  • This paper addresses two interrelated problems concerning the tracking control of pod propulsion unmanned surface vessel (USV), namely, the modeling of pod propulsion USV, and tracking controller design. First, based on MMG modeling theory, the model of pod propulsion USV is derived. Furthermore, a practical adaptive neural tracking controller is proposed by backstepping technique, neural network approximation and adaptive method. Meanwhile, unlike some existing tracking methods for surface vessel whose control algorithms suffer from "explosion of complexity", a novel neural shunting model is introduced to solve the problem. Using a Lyapunov functional, it is proven that all error signals in the system are uniformly ultimately bounded. The advantages of the paper are that first, the underactuated characteristic of pod propulsion USV is proved; second, the neural shunting model is used to solve the problem of "explosion of complexity", and this is a combination of knowledge in the field of biology and engineering; third, the developed controller is able to capture the uncertainties without the exact information of hydrodynamic damping structure and the sea disturbances. Numerical examples have been given to illustrate the performance and effectiveness of the proposed scheme.

Design of Processor Lever Controller for Electric Propulsion System of Naval Ship (전기추진 함정용 프로세서 레버 제어기 설계)

  • Shim, Jaesoon;Lee, Hunseok;Jung, Sung-Young;Oh, Jin-Seok
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.25 no.1
    • /
    • pp.134-145
    • /
    • 2021
  • It is common to optimize the propulsion control system through a so-called tuning process that modifies the parameter values of the propulsion control software during a ship commissioning. However, during this process, if the error of the initial setting value is large, the tuning time may take too long, or the propulsion equipment can be seriously damaged. Therefore, we conducted research on the design of a propulsion controller that applied a Processor lever controller even for inexperienced people with relatively little experience in tuning propulsion control software to be able to reduce the tuning time while protecting the propulsion system. Through simulation, by comparing the execution result of propulsion control lever commands through the PI controller without applying the Processor lever controller. We analyzed the improvement of the Overshoot and propulsion performance. The simulation results showed that the safety of the propulsion system increased because Overshoot of approximately 9.74%, which occurred when the Processor lever function was not applied.

Design of the robust propulsion controller using nonlinear ARX model (비선형 ARX 모델을 이용한 센서 고장에 강인한 추진체 제어기 설계)

  • Kim, Jung-Hoe;Gim, Dong-Choon;Lee, Sang-Jeong
    • Proceedings of the Korean Society of Propulsion Engineers Conference
    • /
    • 2011.11a
    • /
    • pp.599-602
    • /
    • 2011
  • A propulsion controller for one-time flight vehicles should be designed robustly so that it can complete its missions even in case sensor failures. These vehicles improve their fault tolerance by back-up sensors prepared for the failure of major sensors, which raises the total cost. This paper presents the NARX model which substitutes vehicles' velocity sensors, and detects failure of sensor signals by using model based fault detection. The designed NARX model and fault detection algorithm were optimized and installed in TI's TMS320F2812 so that they were linked to HILS instruments in real-time. The designed propulsion controller made the vehicle to have better fault tolerance with fewer sensors and to complete its missions under a lot of complicated failure situations. The controller's applicability was finally confirmed by tests under the HILS environment.

  • PDF

A Study on The Synchronous Control of Dual Electric Propulsion System Based on the Coupling Structure (커플링구조에 기초한 전기추진시스템의 동기제어에 관한 연구)

  • Yang, Kyong-Uk;Byun, Jung-Hwan
    • The Journal of the Korea institute of electronic communication sciences
    • /
    • v.13 no.2
    • /
    • pp.349-356
    • /
    • 2018
  • In this study, the synchronous control system is designed to restrain the speed difference generated between two propellers, namely, synchronous error in a dual electric propulsion system of unmanned surface vehicle, fish finder boat, etc. The control system based on coupling structure is composed of pre-filters and speed controllers for each propulsion system and a synchronous controller cross-coupled between two propulsion systems. The pre-filter and speed controller are designed in order that the propulsion system may follow the speed reference without overshoot and input saturation. And the synchronous controller is designed in consideration of damping and quickness of the synchronous controller system after analyzing effect of the skew disturbance and mismatched dynamic characteristics on synchronous error. Finally, the simulation results show that the designed control system is effective for elimination of synchronous error.

A Study of Control Algorithm for Propulsion System (열차 추진제어장치의 알고리즘에 관한 연구)

  • Choi, Jae-Ho;Kim, Hyung-Chul
    • Journal of the Korean Society for Railway
    • /
    • v.10 no.1 s.38
    • /
    • pp.51-56
    • /
    • 2007
  • In this paper, control schemes are developed for a propulsion system(Converter/Inverter) in electrical train. A robust controller for PWM converter is proposed. The converter controller consists of a PI controller for DC output voltage and a current controller using error-space approach for maintaining the sinusoidal current waveform and unity power factor. This proposed method is based on characteristic ratio assignment(CRA) method which has the advantage to design the optimal gain to meet the referenced response and overshoot within the limit range. Inverter system is controlled by vector control and slip frequency control. At low speed region, vector control scheme is applied to control instantaneous torque and slip frequency control is performed under overmodulation region and one pulse mode. Because output voltage of converter contains harmonics ripple at twice input ac line frequency, control scheme is developed to reduce the pulsating torque current. The performance of propulsion system will be verified by simulation and prototype experimental results.

Gain Scheduling Controller Design and Performance Evaluation for Thrust Control of Variable Thrust Solid Rocket Motor (가변 추력 고체추진기관의 추력 제어를 위한 이득 계획 제어기 설계 및 성능 분석)

  • Hong, SeokHyun
    • Journal of the Korean Society of Propulsion Engineers
    • /
    • v.20 no.1
    • /
    • pp.28-36
    • /
    • 2016
  • Theoretical model of a variable thrust solid rocket motor with a pintle nozzle was derived. For the chamber pressure control, classical model linearization and proportional-intergral controller was used. And then two types of gain scheduling controller were suggested to imporve controller performance for the non-linear propulsion model. Considering characteristics of systems, control gains were scheduled by chamber pressure or free volume. Step responses of each controllers were compared. As a result, the proper control algorithm about characteristics of variable thrust rocket motor was suggested.