scholarly journals Application of the Dependency Graph Method in the Analysis of Automatic Transmission Gearboxes

2021 ◽  
Vol 11 (2) ◽  
pp. 7033-7040
Author(s):  
A. Deptuła
Keyword(s):  
Automatic Transmission ◽  
Dependency Graph ◽  
Tree Structure ◽  
Operational Parameters ◽  
Game Tree ◽  
Algorithmic Approach ◽  
Dependency Graphs ◽  
Graph Method ◽  
Automatic Transmissions ◽  
Current Article

The current article discusses the use of the dependency graph method to design and analyze automatic transmissions. Different goals may be served by modeling an automatic transmission using graphs. The most important of them are: determining the gear ratios for gears and the analysis of speed and acceleration of the rotating elements. Game tree-structure methods can be used to analyze the functional schemes of the selected gears. This paper describes the method of generating a system of kinematics equations for signal dependency graphs. This allows the generalization and extension of the algorithmic approach, and also further analyses and syntheses, such as checking the isomorphism of the proposed solutions and determining the validity of the structure and the operational parameters of the analyzed gears.

scholarly journals APPLICATION OF COMPLEX GAME-TREE STRUCTURES FOR THE HSU GRAPH IN THE ANALYSIS OF AUTOMATIC TRANSMISSION GEARBOXES

2018 ◽  
Vol 18 (4) ◽  
pp. 96-113
Author(s):  
Adam DEPTULA ◽  
Marian A. PARTYKA
Keyword(s):  
Information Systems ◽  
Automatic Transmission ◽  
Operating Parameters ◽  
Objective Functions ◽  
Logic Tree ◽  
Game Tree ◽  
Tree Structures ◽  
Algorithmic Approach ◽  
Game Trees ◽  
Decision Methods

In the article was discussed the possibility of structures and information systems complex game trees for the analysis of automatic gearboxes. The purpose of modelling an automatic gearbox with graphs can be versatile, namely: determining the transmission ratio of individual gears, analysing the speed and acceleration of individual rotating elements. In a further step, logic tree-decision methods can be used to analyse functional schemes of selected transmission gears. Instead, for graphs that are models of transmission, parametrically acting tree structures can be used. This allows for the generalization and extension of the algorithmic approach, furthermore in the future it will allow further analyses and syntheses, such as checking the isomorphism of the proposed solutions, determining the validity of construction and / or operating parameters of the analysed gears. The game tree structure describes a space of possible solutions in order to find optimum objective functions. There is the connection with other graphical structures which can be graphs in another sense, or even decision trees with node and/or branch coding.

scholarly journals AUTOMATIC TRANSMISSIONS. COMPLEX OF ALGORITHMS OF “CLUTCH-TO-CLUTCH SHIFTS” TECHNOLOGY: ANALYSIS OF ARCHITECTURE, GENERALIZED STRUCTURE, DEVELOPMENT. PART 2

2021 ◽  
Vol 3 (56) ◽  
pp. 13-24
Author(s):  
Leonid G. KRASNEVSKIY ◽  
Keyword(s):  
Automatic Transmission ◽  
Russian Language ◽  
General Motors ◽  
Control Algorithms ◽  
Automatic Transmissions ◽  
Continuously Variable Transmissions ◽  
First Time ◽  
The Russian Language ◽  
Functional Purpose

The article continues the series of the author publications, which considers the main provisions of the “Clutch-to-Clutch Shifts” (CTC) technology — technology for automatic controlling the switching of automatic transmission (AT) stages, used in the global mass production of vehicles, hybrid and battery electric vehicles. It provides high-quality shifts, brought to the level of continuously variable transmissions. Development of power units in recent years has led to a rapid increase in the number of AT stages, which is accompanied by a complication of kinematic schemes, designs, control algorithms and, in general, an increase in the role of mechatronic control systems (MCS) in ensuring their high technical level. Effectiveness of the CTC technology depends on the perfection of the algorithms used. But their composition is not specified, which, with a large amount of information, makes it difficult for potential users to navigate in this set. In this paper, we propose (for the first time in the Russian language) the generalized structure of a set of standard algorithms necessary for the implementation of this technology in the AT MCS, which is developed on the basis of their selection from a pre-formed database of patents and publications on the theory and technology of AT control, following classification and grouping by functional purpose. For each item of the structure, there are links to patents with matching names. Detailed descriptions of several typical CTC algorithms in the AT MCS of General Motors patents are given.

Generating Predictable and Adaptive Dialog Policies in Single- and Multi-domain Goal-oriented Dialog Systems

2021 ◽  
Vol 15 (04) ◽  
pp. 419-439
Author(s):  
Nhat Le ◽  
A. B. Siddique ◽  
Fuad Jamour ◽  
Samet Oymak ◽  
Vagelis Hristidis
Keyword(s):  
State Of The Art ◽  
Directed Graphs ◽  
Dependency Graph ◽  
The Other ◽  
Middle Ground ◽  
User Characteristics ◽  
Dialog Systems ◽  
Dependency Graphs ◽  
Novel Structure ◽  
Art Research

Most existing commercial goal-oriented chatbots are diagram-based; i.e. they follow a rigid dialog flow to fill the slot values needed to achieve a user’s goal. Diagram-based chatbots are predictable, thus their adoption in commercial settings; however, their lack of flexibility may cause many users to leave the conversation before achieving their goal. On the other hand, state-of-the-art research chatbots use Reinforcement Learning (RL) to generate flexible dialog policies. However, such chatbots can be unpredictable, may violate the intended business constraints, and require large training datasets to produce a mature policy. We propose a framework that achieves a middle ground between the diagram-based and RL-based chatbots: we constrain the space of possible chatbot responses using a novel structure, the chatbot dependency graph, and use RL to dynamically select the best valid responses. Dependency graphs are directed graphs that conveniently express a chatbot’s logic by defining the dependencies among slots: all valid dialog flows are encapsulated in one dependency graph. Our experiments in both single-domain and multi-domain settings show that our framework quickly adapts to user characteristics and achieves up to 23.77% improved success rate compared to a state-of-the-art RL model.

SIMILARITIES AND DIFFERENCES OF COMPLEX PARAMETRIC GAME TREES FOR INVESTIGATIONS OF DYNAMIC PROPERTIES OF MACHINE SYSTEMS

2012 ◽  
Vol 165 (3) ◽  
pp. 314-325
Author(s):  
Adam DEPTUŁA ◽  
Marian PARTYKA
Keyword(s):  
Dynamic Properties ◽  
Operational Parameters ◽  
Game Tree ◽  
Tree Structures ◽  
Machine System ◽  
Game Trees ◽  
Dependence Graphs ◽  
Analysis And Synthesis ◽  
Similarities And Differences ◽  
Machine Systems

The paper concerns the application of dependence graphs and game tree-structures for the analysis and synthesis of the dynamic properties of machine systems. Graph distributions starting from various beginning vertices are presented in this paper. In order to illustrate the acceptable subsystems of parent machine system, similarities and differences between complex parametric trees are also given. It is also possible to find the part common to all the game tree-structures and describe it over separate design or operational parameters.

Paper 6. Semi-Automatic Transmissions Incorporating Hydrokinetic Torque Converters

1969 ◽  
Vol 184 (9) ◽  
pp. 114-128
Author(s):  
R. Filderman
Keyword(s):  
Automatic Transmission ◽  
Transmission System ◽  
Automatic Transmissions ◽  
Gear Change ◽  
Torque Converters

This paper describes the well-known Ferodo semi-automatic transmission system in which the clutch operation is controlled automatically by the operation of the gear-change lever.

Control of A Friction Launch Automatic Transmission Using a Range Clutch

2006 ◽  
Author(s):  
Chunhao J. Lee ◽  
Kumar Hebbale ◽  
Shushan Bai ◽  
Farzad Samie
Keyword(s):  
Robust Control ◽  
Fuel Economy ◽  
Control Strategy ◽  
Automatic Transmission ◽  
Torque Converter ◽  
Control Algorithms ◽  
Automatic Transmissions ◽  
Fuel Economy Improvement ◽  
Vehicle Test ◽  
Overall Ratio

Friction Launch transmissions use a wet multi-plate clutch to replace the torque converter in an automatic transmission. The main benefit of this technology is fuel economy improvement as a result of eliminating the losses in the torque converter. By using one of the range clutches inside the transmission instead of an input clutch in place of the converter, the benefits of this integrated friction launch technology, such as reduction in mass, packaging, and cost, can be enhanced. The availability of new automatic transmissions with higher number of speeds and wider overall ratio spreads makes this technology more viable than ever before. This project focuses on control issues with the friction launch clutch which include developing robust control algorithms for launch and creep, and providing damping to the driveline, when required, and ensuring acceptable vehicle drivability. This paper describes in detail the development of vehicle launch control algorithms. Vehicle test data is presented to show that the control strategy developed in this project significantly reduces the gap between the drivability of a starting clutch vehicle and a torque converter equipped vehicle.

scholarly journals Graphs and colorings for answer set programming

2006 ◽  
Vol 6 (1-2) ◽  
pp. 61-106 ◽  
Author(s):  
KATHRIN KONCZAK ◽  
THOMAS LINKE ◽  
TORSTEN SCHAUB
Keyword(s):  
Proof Theory ◽  
Answer Set Programming ◽  
Logic Programs ◽  
Algorithmic Approach ◽  
Dependency Graphs ◽  
Basic Strategy ◽  
Content System ◽  
Formal Properties ◽  
Answer Sets ◽  
Answer Set

We investigate the usage of rule dependency graphs and their colorings for characterizing and computing answer sets of logic programs. This approach provides us with insights into the interplay between rules when inducing answer sets. We start with different characterizations of answer sets in terms of totally colored dependency graphs that differ in graph-theoretical aspects. We then develop a series of operational characterizations of answer sets in terms of operators on partial colorings. In analogy to the notion of a derivation in proof theory, our operational characterizations are expressed as (non-deterministically formed) sequences of colorings, turning an uncolored graph into a totally colored one. In this way, we obtain an operational framework in which different combinations of operators result in different formal properties. Among others, we identify the basic strategy employed by the noMoRe system and justify its algorithmic approach. Furthermore, we distinguish operations corresponding to Fitting's operator as well as to well-founded semantics.

scholarly journals The design and development of an automatic transmission solenoid tester for wheeled vehicles

2020 ◽  
Vol 12 (5) ◽  
pp. 168781402091474
Author(s):  
Ming-Sen Hu
Keyword(s):  
Automatic Transmission ◽  
Driving Safety ◽  
Multiple Channels ◽  
Pressure Regulation ◽  
Visibility Function ◽  
Automatic Transmissions ◽  
The Difference ◽  
Critical Components ◽  
Wheeled Vehicles ◽  
Test Result

Solenoids are the most critical components in automatic transmissions. They are used to control the shift points, clutch locking, or pressure regulation of automatic transmissions. Since the number, type, and order of the solenoids all differ when they are used in different vendor’s automatic transmissions, making accurate normal/abnormal decisions for solenoids is very difficult, as it can lower the maintenance quality, to waste labor and material cost, and even reduce driving safety. This article proposes an “abnormal” inspecting method (i.e. for abnormality) for solenoids with high inspect ability and develops a learnable automatic transmission solenoid tester. This tester can perform solenoid testing on multiple channels at the same time. The test result statistics for all channel solenoids tested are generated automatically. It also provides visibility for users to view the difference comparisons of testing curves of temperature, pressure, voltage, current, and resistance on a graphical screen. The curve visibility function will be helpful for the solenoid diagnosis of abnormal or fault reasons.

Application of decision logic trees and game-tree structures in analysis of automatic transmission gearboxes

Trudy NAMI ◽  
2021 ◽  
pp. 6-21
Author(s):  
A. Deptuła ◽  
R. Kh. Kurmaev
Keyword(s):  
Automatic Transmission ◽  
Knowledge Generation ◽  
Practical Significance ◽  
Problem Statement ◽  
Game Tree ◽  
Tree Structures ◽  
Optimal Decisions ◽  
Optimal Programming ◽  
Decision Logic ◽  
Selection Of

Introduction (problem statement and relevance). The graphs, logic and game-tree structures methods have been used in mechanics. The purpose of modeling an automatic gearbox with graphs can be versatile, namely: determining the transmission ratio of individual gears, analyzing the speed and acceleration of individual rotating elements.The purpose of the study. The article presents the application of decision trees in the analysis of automatic gearboxes modeled with the Hsu graph.Methodology and research methods. The paper presents a method of generating game tree structures that allow to change the values of decision parameters in the issues of decision making and knowledge generation. Specifying the rank of importance, in which order you should change individual items to active, allows you to detect the so-called redundant or temporarily redundant components for a given gear currently under consideration.Scientific novelty and results. At each stage of optimization, a tree is generated, selecting the optimal decisions. Then, vertices can be added to the tree that represent the optimal responses of the system to changes in arithmetic construction parameters.Practical significance. The most important in this regard will be the selection of the optimal programming environment with the possibility of installing the program in laboratory

Design and Optimization of Clutch Hydraulic Shift Control System in Automatic Transmissions with Failure Protection Function

2015 ◽  
Vol 743 ◽  
pp. 11-16
Author(s):  
S.H. Tang ◽  
Yan Fang Liu ◽  
Xiao Han
Keyword(s):  
Control System ◽  
Design Method ◽  
Automatic Transmission ◽  
Hydraulic Control ◽  
Design And Optimization ◽  
Significant Control ◽  
Shift Control ◽  
Traditional Design ◽  
Automatic Transmissions ◽  
Hydraulic Control System

As a significant control component of vehicles, automatic transmissions should have failure protection function. The failure protection function partly is determined by the hydraulic control system. However traditional design could not cover all of failures, and there is no general design method. A design method is proposed for designing the shift control oil circuit of the hydraulic control system with the failure protection function. . The design method is applied to optimize the hydraulic control system of a six-speed automatic transmission. The function of the optimized hydraulic control system is confirmed by the dynamic simulation. The results show that the design method can simplify the hydraulic control system without losing any original functions. The proposed design method is proved to be suitable for all kinds of hydraulic control systems of automatic transmissions.

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