Objective Evaluation of ESP System Based on Hardware-in-Loop Test Bench

2013 ◽  
Vol 694-697 ◽  
pp. 2080-2084
Author(s):  
Sheng Yi Xuan ◽  
Chuan Xue Song ◽  
Guang Wei Meng
Keyword(s):  
Control Algorithm ◽  
Evaluation Method ◽  
Test Bench ◽  
Objective Evaluation ◽  
Control Effect ◽  
Simulation Test ◽  
Pd Control ◽  
Time Test ◽  
Hardware In Loop ◽  
Hardware In Loop Simulation

The evaluation tests play an important role in modern vehicle development. As a mean of judging vehicles performance and quality in the design period, the evaluation tests guide the development and the design. In this paper, objective evaluation of ESP is researched based on the self-correcting threshold PD control algorithm and ESP hardware-in-loop simulation test bench. Real-time test bench is used to simulate the different conditions and the evaluation methods of ESP are tested to verify the effect. By hardware-in-loop simulation, the results demonstrate the objective evaluation method evaluates the ESP system in accordance with the results of self-correcting threshold PD control algorithm and the method could accurately reflect the ESP control effect.

scholarly journals Aeroload Simulation of Interceptor Missile using Fin Load Simulator

2021 ◽  
Vol 71 (1) ◽  
pp. 102-107
Author(s):  
M.V.K.S. Prasad ◽  
Patri Sreehari Rao ◽  
Jagannath Nayak
Keyword(s):  
Control Algorithm ◽  
Navigation Algorithm ◽  
Actuation System ◽  
Control Command ◽  
Load Simulator ◽  
The Difference ◽  
Miss Distance ◽  
Hardware In Loop ◽  
Hardware In Loop Simulation ◽  
Mission Objective

Interceptor missiles are designed to destroy enemy targets in air. Targets can be destroyed either in atmosphere or out of atmosphere. So for Air Defence scenario, a two layer protection system is required with one taking care of exo atmosphere and another endo atmosphere. In this Air Defence scenario, irrespective of target trajectory interceptor should neutralise it. So the control, guidance are to be designed and validated thoroughly with various scenarios of interceptor and target. These interceptors sense the rates from rate gyroscopes and accelerations from accelerometers which are fitted on board the interceptor. The navigation algorithm calculates the interceptor’s position and velocity from these rates and accelerations from time to time. Using these interceptor data and target information received from ground RADAR or on board seeker, guidance calculates accelerations demand and subsequently rate demand. The control algorithm runs in on board mission computer along with guidance. The control algorithm calculates the commanded rate and eventually commanded deflections to the control fins to move towards the target. The fins have to move as per commanded deflections to meet the mission objective of hitting the target. But the load known as aeroload which comes on the control fins during mission, causes control fins not to move as per command. Due to the difference between control command and physical movement of fin, the expected path towards target deviates. This increases the miss distance and also misses the target hit. This aeroload scenario is to be simulated on ground and some feature is to be designed to take care of it during mission. By studying the control system behaviour due to load, the control autopilot is to be automatically tuned to compensate for the loss in commanded deflections. This scenario can be carried out in Hardware-in-Loop simulation (HILS) setup. Mission load conditions can be applied on hardware actuation system in HILS setup and mission performance can be seen and also with different loads and different autopilot tunings.

Model Simulation of Electronic Unit Pump Diesel Engine Oriented to Control

2012 ◽  
Vol 443-444 ◽  
pp. 495-500
Author(s):  
Jun Wang ◽  
Shu Han ◽  
You Tong Zhang
Keyword(s):  
Diesel Engine ◽  
Model Simulation ◽  
Model Verification ◽  
Electronic Unit ◽  
Simulation Test ◽  
Pump System ◽  
Calculation Step ◽  
Electronic Unit Pump ◽  
Hardware In Loop ◽  
Hardware In Loop Simulation

To broaden the application range of hardware in loop simulation for electronic controlled unit, study on model simulation of electronic unit pump diesel engine oriented to control is made, the requirement and selection of simulation model oriented to control in electronic unit pump diesel engine is provided, model of simplified nonlinearity in diesel engine and electronic unit pump system are established in Matlab/Simulink, model verification shows that this model can achieve relative accuracy, by means of calculation time and parameter, different calculation step and method affecting model output is analyzed and compared. Real engine model is applied into hardware-in-loop simulation test, its results show that model can perform real-time ECU hardware-in-loop simulation test accurately.

Durability of Hand in Spandex Blend Fabrics

1988 ◽  
Vol 58 (7) ◽  
pp. 398-408 ◽  
Author(s):  
Hiroko Yokura ◽  
Masako Niwa
Keyword(s):  
Mechanical Properties ◽  
Evaluation Method ◽  
Wear Test ◽  
Objective Evaluation ◽  
Laboratory Simulation ◽  
Test Machine ◽  
Simulation Test ◽  
Cross Sectional ◽  
The Core ◽  
Spun Yarns

The durability of hand in spandex blend fabrics (1% spandex-wool and 2% spandex-wool/pe blends) was evaluated by the wear test and the laboratory simulation test, using an objective evaluation method of fabric handle based on the mechanical properties measured by the kes-fb system. The simulation test was performed to simulate the fabric fatigue process in actual wear by means of the kes-f5 fatigue test machine and commercial dry-cleaning. From the wear test, the primary hand values of numeri (smoothness) and fukurami (softness and fullness) showed a greater decrease for the spandex blend fabrics than those for the worsted fabrics. From the simulation test, the total and primary hand values of numeri for the spandex blend fabrics decreased remarkably compared with those for the conventional fabrics. The surface abrasion of the spandex blend fabrics caused by the wear test was much greater than that of the worsted fabrics, and was confirmed by the simulation test results. From the changes in the mechanical properties caused by the simulation test, spandex blend fabrics appear to show extensive bagging, whereas wrinkle resistance is stronger than that of the conventional fabrics. The cross-sectional areas of the spandex-wool/pe blend core spun yarns increased significantly with the simulation test, with a comparable decrease of resilience in the tensile properties, in contrast with the worsted yarns. The structural modifications in fiber assemblies of the core spun yarns govern the increase in hysteresis components of both the fabric and yarn, and the degradation of fibers in the core spun yarns contributes to the deterioration of the spandex blend fabrics.

Research on Integrated Decision Control Algorithm for Autonomous Vehicles Under Multi-Task Hybrid Constraints in Intelligent Transportation Scenarios

2022 ◽  
Author(s):  
Zonghuan Guo ◽  
Dihua Sun ◽  
Lin Zhou
Keyword(s):  
Decision Making ◽  
Autonomous Vehicles ◽  
Control Algorithm ◽  
Process Analysis ◽  
Autonomous Driving ◽  
Test Method ◽  
Control Effect ◽  
Simulation Test ◽  
Intelligent Decision Making ◽  
Integrated Decision Making

In order to improve the decision-making and control effect of autonomous vehicles, in this paper, combined with literature research and process analysis, the control algorithm of autopilot vehicle is analyzed, and the driving process is analyzed combined with the flow method. In order to improve the effect of autonomous driving, with the support of improved algorithms, an integrated decision-making control system for autonomous vehicles under multi-task constraints in intelligent traffic scenarios is constructed, and system performance is improved by simulating autonomous driving decisions in a variety of complex situations. Moreover, this paper designs the road driving model according to actual needs, sets the functional modules of the entire system, and build the overall framework of the system. Finally, in order to study the integrated decision-making effect of this system, this paper conducts test research by designing a simulation test method. From the simulation test results, it can be seen that the intelligent decision-making system for autonomous vehicles constructed in this paper has certain effects.

Simulation and Inertial Force Research of Three-Channel Hydraulic Loading Test Bench

2014 ◽  
Vol 543-547 ◽  
pp. 1331-1334
Author(s):  
Yan Jie Luo ◽  
Jia Chen Li ◽  
Yun Fei Mai
Keyword(s):  
Tracking Control ◽  
Control Algorithm ◽  
Test Bench ◽  
Inertial Force ◽  
Control Effect ◽  
Loading Test ◽  
Hydraulic Loading ◽  
Input Signals ◽  
Control Principle ◽  
Bench Model

This paper states the control principle of the three-channel hydraulic loading test bench for automobile steering gear test. The test bench model considering inertial force is constructed and simulated. The Integral-Separated PID control algorithm is adopted to optimize control effect and the respond features of the input signals are analyzed. The simulation results show that the system works steadily, the accuracy of synchronization control is better and the tracking control achieves well.

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