Research of Gear Shift Control Technology for a New 8-Step Speed Automatic Transmission

2013 ◽  
Vol 455 ◽  
pp. 376-382 ◽  
Author(s):  
Yang Liu ◽  
Shu Han Wang ◽  
Xi Lu ◽  
Ting Bin Song ◽  
Wen Shu Wei ◽  
...  
Keyword(s):  
Control Algorithm ◽  
Automatic Transmission ◽  
Estimation Method ◽  
Engineering Application ◽  
Shift Control ◽  
Torque Estimation ◽  
Set Up ◽  
Control Principle ◽  
Shift Clutch ◽  
The Ideal

For the development research for a new 8 step speed automatic transmission, a simplified dynamic model for this transmission was established. Aimed at four basic shift types, the ideal characteristics of shift clutch and engine control were set up. By using torque estimation method, PI slip control algorithm and engine coordinated control principle, the control model were developed for two main shift phases which are torque phase and inertia phase. The test on the rig and vehicle verified the accuracy and feasibility of this shift control strategy. The development model and algorithm have a high value for engineering application.

Torque Phase Shift Control Based on Clutch Torque Estimation

2013 ◽  
Author(s):  
Diana Yanakiev ◽  
Yuji Fujii ◽  
Eric Tseng ◽  
Gregory M. Pietron ◽  
Joseph Kucharski ◽  
...  
Keyword(s):  
Closed Loop ◽  
Automatic Transmission ◽  
Time Estimation ◽  
Transfer Phase ◽  
Shift Method ◽  
Shift Control ◽  
Input And Output ◽  
Torque Estimation ◽  
Real Time Estimation ◽  
Clutch Torque

An automatic transmission shift method is presented, in which the torque transfer phase is controlled in closed loop. This is made possible by real-time estimation of the torque transmitted by the off-going and on-coming clutches participating in the shift. Each clutch torque is determined based on measured or estimated input and output shaft torques and accelerations. To illustrate an application of the method, traditional friction elements are used to emulate one-way-clutch function during a power-on upshift.

Study of Control Algorithm for Indirect Stabilized Optical Seeker

2010 ◽  
Vol 44-47 ◽  
pp. 4053-4057
Author(s):  
Ye Feng Xu ◽  
Zhong Yi Zhang ◽  
Kui Li ◽  
Meng Ke He
Keyword(s):  
Control Algorithm ◽  
Error Control ◽  
Angular Rate ◽  
Engineering Application ◽  
Coordinate Frame ◽  
Loop Control ◽  
Control Approach ◽  
System A ◽  
Torque Estimation ◽  
Simulation And Experiment

Indirect stabilization technology can make the optical seeker lower cost and more compact, but it will also decrease the system’s performance. In order to improve the line-of-sight (LOS) stabilization precision, the indirect stabilized seeker’s model and loop control algorithm must be deeply studied. In this paper, the dynamic model of LOS coordinate frame is created according to the working principle of indirect stabilization system; A new no-angle-error control scheme was proposed. For severse disturbance environment, a feedforward torque compensation control algorithm was proposed based on disturbance torque estimation. The simulation and experiment results show that the proposed control approach can make the system tracking the instruction angular rate quickly and exactly, and also have the strong disturbance resistance ability. The study result will have great significance to the indirect stabilization technology’s theory study and engineering application.

Research on Integrated Shift Control Strategy for Automatic Transmission

2016 ◽  
Vol 835 ◽  
pp. 687-692 ◽  
Author(s):  
Lin Yue Zhang ◽  
Yao Fu ◽  
Xing Zhong Li
Keyword(s):  
Control Strategy ◽  
Integrated Control ◽  
Automatic Transmission ◽  
Shift Quality ◽  
Shift Control ◽  
Output Torque ◽  
Control Target ◽  
Simulation Results ◽  
Process Engine ◽  
Control Principle

Shift process of automatic transmission is divided into torque phases and inertia phase, and the control principle of clutch to clutch shift is studied with the lever method. Then, inertia phase engine and transmission integrated control principle and entire shift process engine and transmission integrated control principle are respectively studied with taking power on up shift as study example and taking the transmission output torque fluctuations during shifting minimum as control target. Simulation results are compared to the results of power on up shift without engine and transmission integrated control, and it is proved that the transmission output torque overshoot peak with inertia phase engine and transmission integrated control strategy is decreased significantly and shifting jerks are reduced. Shift quality is improved significantly.

The World Underfoot

2018 ◽  
Author(s):  
Hallie M. Franks
Keyword(s):  
The Political ◽  
Classical Period ◽  
Social Fabric ◽  
Physiological Reaction ◽  
The Social ◽  
The World ◽  
Foreign Land ◽  
Social Gathering ◽  
Set Up ◽  
The Ideal

In the Greek Classical period, the symposium—the social gathering at which male citizens gathered to drink wine and engage in conversation—was held in a room called the andron. From couches set up around the perimeter of the andron, symposiasts looked inward to the room’s center, which often was decorated with a pebble mosaic floor. These mosaics provided visual treats for the guests, presenting them with images of mythological scenes, exotic flora, dangerous beasts, hunting parties, or the specter of Dionysos, the god of wine, riding in his chariot or on the back of a panther. This book takes as its subject these mosaics and the context of their viewing. Relying on discourses in the sociology and anthropology of space, it argues that the andron’s mosaic imagery actively contributed to a complex, metaphorical experience of the symposium. In combination with the ritualized circling of the wine cup from couch to couch around the room and the physiological reaction to wine, the images of mosaic floors called to mind other images, spaces, or experiences, and, in doing so, prompted drinkers to reimagine the symposium as another kind of event—a nautical voyage, a journey to a foreign land, the circling heavens or a choral dance, or the luxury of an abundant past. Such spatial metaphors helped to forge the intimate bonds of friendship that are the ideal result of the symposium and that make up the political and social fabric of the Greek polis.

Development of 2 Stage CVT Shift Control Algorithm to Reduce Torque Variation During 1-2 Upshift of Planetary Gear

2012 ◽  
Author(s):  
Jeongman Park ◽  
Sunghyun Ahn ◽  
Oheun Kwon ◽  
Youngho Jun ◽  
Minhyo Kim ◽  
...  
Keyword(s):  
Control Algorithm ◽  
Planetary Gear ◽  
Gear Ratio ◽  
Shift Quality ◽  
Response Characteristics ◽  
Shift Control ◽  
Variable Transmission ◽  
Vehicle Simulator ◽  
Simulation Results ◽  
Fuzzy Control Algorithm

In this paper, a 2 stage continuously variable transmission (CVT) shift control algorithm is proposed for the 1–2 upshift of the planetary gear to achieve the shift quality. A fuzzy control algorithm is designed considering the relatively slower response characteristics of CVT. In order to evaluate the performance of the control algorithm, a 2 stage CVT vehicle simulator is developed including a dynamic model of the CVT powertrain. From the simulation results, it is found that CVT gear ratio changes faster in the inertia phase and remains constant after the inertia phase of the planetary gear shift, which provides the reduced torque variation by the proposed control algorithm.

GIS Based Multi-Criteria decision support system and machine learning for Hospital Site Selection case study Oran - Algeria

2022 ◽  
Vol 14 (1) ◽  
pp. 0-0
Keyword(s):  
Site Selection ◽  
Decision Makers ◽  
Analysis Method ◽  
Automatic Learning ◽  
Hospital Site ◽  
Set Up ◽  
High Level ◽  
Selection Of ◽  
The Ideal

The selection of hospital sites is one of the most important choice a decision maker has to take so as to resist the pandemic. The decision may considerably affect the outbreak transmission in terms of efficiency , budget, etc. The main targeted objective of this study is to find the ideal location where to set up a hospital in the willaya of Oran Alg. For this reason, we have used a geographic information system coupled to the multi-criteria analysis method AHP in order to evaluate diverse criteria of physiological positioning , environmental and economical. Another objective of this study is to evaluate the advanced techniques of the automatic learning . the method of the random forest (RF) for the patterning of the hospital site selection in the willaya of Oran. The result of our study may be useful to decision makers to know the suitability of the sites as it provides a high level of confidence and consequently accelerate the power to control the COVID19 pandemic.

scholarly journals Smooth Gear Shift Control System of Automatic Transmission Using Estimated Output Shaft Torque.

1995 ◽  
Vol 61 (591) ◽  
pp. 4334-4338
Author(s):  
Toshimichi Minowa ◽  
Hiroshi Kimura ◽  
Junichi Ishii ◽  
Masahiko Ibamoto
Keyword(s):  
Control System ◽  
Automatic Transmission ◽  
Output Shaft ◽  
Gear Shift ◽  
Shift Control ◽  
Shaft Torque

Research on Simulation and Modeling of Split Double-Rotor Motor Based on Indirect Vector Control

2011 ◽  
Vol 317-319 ◽  
pp. 672-677
Author(s):  
Bin Wei ◽  
Ji Bin Hu ◽  
Zeng Xiong Peng
Keyword(s):  
Control System ◽  
Vector Control ◽  
Stable State ◽  
System Model ◽  
Dynamic Capability ◽  
Simulation And Modeling ◽  
Simulation Results ◽  
Set Up ◽  
Vector Control System ◽  
Control Principle

A novel vector control system of the split double-rotor motor based on indirect vector control principle has been proposed. The mathematic models of the primary machine and the secondary machine are set up respectively. Through the coupling of the two models, the system model of the split double-rotor motor is build. Matlab software is used for the simulation and analysis of this indirect vector control system. According to the simulation results, the validity of system model is proved with nicer static and dynamic capability, and without steady-state error in stable state. These are important to analyze and design the double-rotor motor. Furthermore, the results provide the basis for simulation and apply of double-rotor motor in HEV.

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