This paper presents a novel design approach of virtual prototype of flight control system of UAV based on Statemate technology, and introduces the process designing a hierarchical function model of FCS with Activity-C...
详细信息
ISBN:
(纸本)9781424417339
This paper presents a novel design approach of virtual prototype of flight control system of UAV based on Statemate technology, and introduces the process designing a hierarchical function model of FCS with Activity-Charts in detail, and at the end of this paper a hardware-in-the-loop simulation testbed is built to verify performances of FCS-VP of UAV in various conditions like that GPS signals are lost and then resumed after some seconds. Results of experiments show that, without any loss of system performance, a mini-scale, high-speed real time complex embedded hybrid system testbed can be made to measure control system operation performance with the lowest investment. It is obviously that the research method for the engineering implementation of systems and the application of VP in control systems is much worthy of applying and generalizing.
Field trial is a very critical stage and high risk in UAV development cycle. HILS is a computer-assisted simulation techniques used in the development and testing of complex embedded real-time systems. HILS has the ab...
详细信息
ISBN:
(纸本)9781509050895
Field trial is a very critical stage and high risk in UAV development cycle. HILS is a computer-assisted simulation techniques used in the development and testing of complex embedded real-time systems. HILS has the ability to simulate UAV flight characteristics, sensor modeling, and modeling of actuators while communicating in real time with flight control hardware. HILS aims to test the reliability of UAV flight control hardware, integration test of Chemical monitoring systems, and tuning the control parameters. Advantages of using HILS are lower the development costs, improve safety, and streamline the development process. HILS provides development process without using actual UAV platform, but by using a mathematical equation to represent the UAV platform that will be used. HILS implement control system on Pixhawk then the output actuators used as model input. Hexacopter model will produce the attitude and position of hexacopter modeled as sensors model. The output of sensors model will be the input for computing the next control command of Pixhawk. HILS can be used to test the integration of UAV platform with Chemical sensor module to ensure Chemical monitoring missions can run well on the real situation.
The hardware-in-the-loop (HIL) simulation is an effective and flexible approach to simulate contact dynamics of flying objects in space. A HIL contact simulation system including the mechanical and control systems is ...
详细信息
ISBN:
(纸本)9781509041022
The hardware-in-the-loop (HIL) simulation is an effective and flexible approach to simulate contact dynamics of flying objects in space. A HIL contact simulation system including the mechanical and control systems is established. One challenging problem of the HIL contact simulation is the simulation divergence caused by time delay. To guarantee the simulation accuracy, the time delay should be compensated. In this study, the force measurement delay is assumed to be a pure delay, which is compensated by a first-order phase lead method. Because the dynamic response delay of the motion simulator is difficult to be modeled, it is compensated by a response error based force compensation method. The dynamic response model is not required. simulations and experiments show that the proposed approach can effectively compensate the simulation divergence and guarantee the simulation fidelity.
This paper presents the petformance of shutdown system one (SDSI) implemented on a programmable logic controller (PLC) within real-time hardware-in-the-loop (HIL) simulation. SDSI evaluation is focused on steam genera...
详细信息
ISBN:
(纸本)9780791848159
This paper presents the petformance of shutdown system one (SDSI) implemented on a programmable logic controller (PLC) within real-time hardware-in-the-loop (HIL) simulation. SDSI evaluation is focused on steam generator (SG) level low trip scenarios. A comparison of the findings with simulated expected plant operation is performed. An Invensys Triconex Tricon v9 safety PLC is interfaced to a real-time nuclear power plant (NPP) simulation suite (DarlSIM), replicating the operation of the Darlington NPP SDS1 Design basis accidents (DBA) associated with SDSI regulatory standards are developed and applied to the two simulation environments. HIL simulation is a preferred method for testing systems prior to installation and is necessary to ensure proper SDS verification and validation. The performance of the Tricon v9 PLC, the HIL simulation platform and the two simulation environments are evaluated.
In this paper, an event-based sampled discrete-time linear system representing a port-fuel-injection process based on wall-wetting dynamics is obtained and formulated as a linear parameter varying (LPV) system. The sy...
详细信息
ISBN:
(纸本)9780791844175
In this paper, an event-based sampled discrete-time linear system representing a port-fuel-injection process based on wall-wetting dynamics is obtained and formulated as a linear parameter varying (LPV) system. The system parameters used in the engine fuel system model are engine speed, temperature, and load. These system parameters can be measured in real-time through physical or virtual sensors. A gain-scheduling controller for the obtained LPV system is then designed based on the numerically efficient convex optimization or linear matrix inequality (LMI) technique. To demonstrate the feasibility of implementing the gain-scheduling controller, a hardware-in-the-loop (HIL) simulation is performed using a mixed mean-value and crank-based engine model. The HIL results show the effectiveness and implementability of the proposed scheme.
This paper details the models of a boost converter for hardware-in-the-loop simulation. The emulated power converter and load are implemented in a Xilinx Virtex 5 device of a dSPACE board using the Xilinx System Gener...
详细信息
ISBN:
(纸本)9781479917624
This paper details the models of a boost converter for hardware-in-the-loop simulation. The emulated power converter and load are implemented in a Xilinx Virtex 5 device of a dSPACE board using the Xilinx System Generator from Matlab/Sinmlink The implementable models are detailed and compared.
The X-by-wire technology, replacing mechanical components with electrical components, is essential to realizing an intelligent vehicle. The technology has many advantages including component reduction, design freedom ...
详细信息
ISBN:
(纸本)9788995003848
The X-by-wire technology, replacing mechanical components with electrical components, is essential to realizing an intelligent vehicle. The technology has many advantages including component reduction, design freedom increase and safety improvement. Brake-by-wire replaces hydraulic brake systems with electrical components. As a part of the x-by-wire technology, the brake-by-wire technology has been actively researched. The technology has a great advantage of solving manufacturing, maintenance and environmental problems associated with hydraulic systems. However, due to absence of mechanical or hydraulic back-up, the brake-by-wire system must be highly reliable and fault-tolerant This requires environment in which the system can be developed and tested safely, before applying to an actual vehicle. The environment must be flexible in developing and testing various algorithms, and be faithful in reproducing the actual system. This study thus develops a brake-by-wire hardware-in-the-loop simulation system that can serve as the environment mentioned above. The electro-mechanical brake type has been adopted in this study for developing the system. A procedure to develop the system was defined and followed to design a brake actuator, select a motor, build hardware components, set up the whole system, and test for performance evaluation. A preliminary test of the developed system shows its effectiveness. However, the test also shows that the response speed of the system should improve. A follow-up study will be conducted to improve system response, develop a full-scale system, and integrate with a steer-by-wire system.
Traditionally, the functional development, testing and verification of higher level automation, control and safety functions in extracorporeal circulations systems relies very much on the conduction of animal experime...
详细信息
ISBN:
(纸本)9798350324471
Traditionally, the functional development, testing and verification of higher level automation, control and safety functions in extracorporeal circulations systems relies very much on the conduction of animal experiments. This especially applies to functions requiring interaction with the patients physiology. Besides ethical aspects, animal experiments have the disadvantage of higher complexity, limited reproducibility and certain pathological conditions can only be represented with difficulty. An alternative to this can be hardware-in-the-loop (HIL) simulators. In this paper we present a HIL solution to simulate the hydraulic interaction between the cannula and the connected blood vessel. We derive a hydraulic model for an elastic vessel with particular emphasis on negative transmural pressure. In this case the resistance is mainly determined by collapse phenomena. The next section describes the design of an universal resistance actuator that can simulate vascular resistances in the expected range. Combined in the HIL simulator, the simulation model then generates the setpoint for the actuator while simultaneously receiving the resulting internal states of the hydraulic interface. This creates a truly interactive HIL simulator where the device under test interacts in the same way as with a physiological system.
hardware-in-the-loop (HiL) simulations where a mechatronic system is used as the device under test (DUT), are established in the automotive sector for the design of active suspension components, e.g. roll-stabilizers....
详细信息
hardware-in-the-loop (HiL) simulations where a mechatronic system is used as the device under test (DUT), are established in the automotive sector for the design of active suspension components, e.g. roll-stabilizers. Usually, uniaxial actuator systems within the test rig are applied for the excitation of the DUT. However, in the context of mechatronic suspension systems incorporating multiple mechatronic subsystems, more sophisticated HiL test rigs / simulations with multiaxial excitation of the DUT are necessary. This contribution presents the model-based design of a HiL simulation for a multiaxial vehicle axle test rig. Within the HiL simulation a nonlinear spatial vehicle dynamics model with 36 states is used to reproduce the environment of the DUT in real-time. The implemented model and its requirements are described in detail. An appropriate HiL control framework is developed, which combines the vehicle dynamics model with the hybrid motion/force control of the manipulator systems. The primary actuator is a hydraulic hexapod. simulation results and measurements obtained with the HiL system show the effectiveness of this approach. The potential for chassis control validation and design is highlighted in comparison to a highly detailed benchmark vehicle dynamics model. (C) 2019, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.
The paper focuses on the practical implementation of a novel control method to an automotive suspension system using active force control (AFC) with iterative learning algorithm (ILA) and proportional-integral-derivat...
详细信息
ISBN:
(纸本)9783037859339
The paper focuses on the practical implementation of a novel control method to an automotive suspension system using active force control (AFC) with iterative learning algorithm (ILA) and proportional-integral-derivative (PID) control strategy. The overall control system to be known as AFC-IL scheme essentially comprises three feedback control loops to cater for a number of specific tasks, namely, the innermost loop for the force tracking of the pneumatic actuator using PI controller, intermediate loops applying AFC with ILA strategy for the compensation of the disturbances and the outermost loop using MD controller for the computation of the desired force. A number of experiments were carried out on a physical test rig with hardware-in-the-loop simulation (HILS) feature that fully incorporates the theoretical elements. The performance of the proposed control method was evaluated and benchmarked to examine the effectiveness of the system in suppressing the vibration effect of the suspension system. It was found that the experimental results demonstrate the superiority of the active suspension system with proposed AFC-IL scheme compared to the PID and passive counterparts.
暂无评论