Agility and Manoeuvrability as Passive Defence for Armoured Vehicles

1988 ◽  
Vol 202 (1) ◽  
pp. 65-70 ◽  
Author(s):  
E Sher ◽  
S Refael ◽  
D Luria
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Experimental Results ◽  
Constant Speed ◽  
Fire Control ◽  
Stationary Target ◽  
The Relationship

A mathematical model is presented and applied to investigate the relationship between the automotive performance and manoeuvring of an armoured vehicle and the probability of its being hit by tank gunfire. The model takes into consideration the type of ammunition, the characteristics of the fire control system and the automotive route of the target. Three cases were examined: a stationary target, an accelerating target and a target moving over a winding course at a constant speed. The model has been calibrated to fit a set of experimental results.

Control Design of Foreign Fibers Detecting System Paving Mechanism

2013 ◽  
Vol 846-847 ◽  
pp. 228-232
Author(s):  
Hua Qing Wang ◽  
Jian Cheng Yang ◽  
Kai Yang ◽  
Jian Feng Qin ◽  
Ze Xu Zhou ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Control Design ◽  
Line Speed ◽  
On Line ◽  
Working Principle ◽  
The Mathematical Model ◽  
The Relationship

In this paper the working principle of cotton foreign fibers detecting and clearing on line device paving and loosing part is described, and the mathematical model of the relationship between line speed is established, and paving part control system that is suitable for this device has been designed on this basis.

Shaping Law and Motion Design in NC-ECM under Effect of Twiste Angle

2011 ◽  
Vol 128-129 ◽  
pp. 1010-1014
Author(s):  
Rui Wu ◽  
Dan Wen Zhang ◽  
Juan Sun
Keyword(s):  
Mathematical Model ◽  
Electrochemical Machining ◽  
Experimental Results ◽  
Working Face ◽  
Relationship Of ◽  
The Mathematical Model ◽  
The Relationship ◽  
Motion Design

The twiste angle has a great effect on shaping law and stability of Numerical Controlled Electrochemical Machining (NC-ECM) process. In order to avoid the disadvantages caused by twiste angle, a methode of study shaping law by dispersing cathode working face in NC-ECM was proposed, and a mathematical model of the shaping law with the effects of twiste angle has been established in this paper. The mathematical model disclosed the relationship of twiste angle β, feeding velocity vf and thickness of removal material h in NC-ECM. Theoretical and experimental results show the the mathematical model of shaping law described in this paper can be considered as a useful reference and is helpful for the analysis of the NC-ECM and general ECM process.

Design and Test of Forest Seed Loam Cutting Machine

2014 ◽  
Vol 1021 ◽  
pp. 186-189 ◽  
Author(s):  
Hai Yong Jiang ◽  
Ai Jun Zhang ◽  
Bao Jian Cui ◽  
Jiang Tao Liu ◽  
Xiao Na Qi ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Design Process ◽  
Tree Species ◽  
Soil Analysis ◽  
Experimental Results ◽  
Highly Efficient ◽  
Cutting Machine ◽  
The Relationship

. In order to meet the needs about collecting the soil containing tree species, we designed an automatic cutting machine which can receive loam containing seeds and used in the forest loam. Features of this machine are the application of the chain plate knife, not only can hierarchical cut loam containing seeds, but also will transport the loam to the collecting bag. In the design process, through building a mathematical model about the chain plate knife cut soil, Analysis of the resistance of working, and get the relationship between the overall level of resistance and the working width. The experimental results show that the machine is easily to be operated, can highly efficient cut soil, and it’s suitable for use in the woodlands.

scholarly journals Mathematical Model of the Surveillance, Tracking and Fire Control System of the Short-Range ADGM System

2019 ◽  
Vol 10 (1) ◽  
pp. 49-58
Author(s):  
Bogdan ZYGMUNT ◽  
Konrad SIENICKI ◽  
Damian WOJTYRA
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Short Range ◽  
Fire Control ◽  
Automatic Tracking ◽  
Air Defense

The paper presents the development and simulation of a mathematical model of an automatic tracking and fire control system. The authors focused on very short-range air defense (VSHORAD) gun/missile systems.

scholarly journals Aircraft Automatic Control System Failure and Flight Safety

2016 ◽  
Vol 3 (1) ◽  
pp. 15-23
Author(s):  
Mareks Šlihta ◽  
Vladimirs Šestakovs ◽  
Ramachandran Karunanidhi
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Flight Safety ◽  
System Failure ◽  
Equipment Failure ◽  
Successful Completion ◽  
The Relationship

Abstract This article presents a mathematical model estimating the probability of successful completion of the aircraft’s flight in case of aviation equipment failure in flight. This paper shows the relationship between the aircraft’s automatic control system and flight safety. The calculations of probability are made for the successful completion of the flight on Boeing 737 aircraft when the automatic control system has failed.

scholarly journals Optimization Design of Actuator Parameters with Stepless Capacity Control System Considering the Effect of Backflow Clearance

2020 ◽  
Vol 10 (8) ◽  
pp. 2703
Author(s):  
Jinjie Zhang ◽  
Chao Zhou ◽  
Zhinong Jiang ◽  
Yao Wang ◽  
Xu Sun
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Good Effect ◽  
Reciprocating Compressor ◽  
Spring Stiffness ◽  
Objective Functions ◽  
Capacity Control ◽  
Hydraulic Force ◽  
The Impact ◽  
The Relationship

The actuator is the key to the stepless capacity control system of a reciprocating compressor. The coupling effect between the actuator and the reciprocating compressor was not considered in the traditional design, and the large design margin led to low system reliability, high cost and low safety. In this paper, a reciprocating compressor and actuator were taken as research objects. The backflow clearance of the suction valve was simulated by CFD (computational fluid dynamics), The relationship between backflow clearance and resultant gas force of the valve plate was discussed. By building a mathematical model of actuators considering backflow clearance and impact rebound, the relationship between the parameters of actuators was studied. Based on the mathematical model and CFD analysis, the hydraulic force and spring stiffness were taken as the design variables, the impact velocity of ejection or withdrawal and the backflow clearance were taken as objective functions, and the actuator parameters were optimized with NSGA-II (Non-dominated Sorting Genetic Algorithm – II). The optimization results show that when the backflow clearance is 0.0065 mm, the hydraulic force is 94.25 N, and the spring stiffness is 11,575.84 N/m, the objective functions are optimized, the parameters are significantly improved, and a good effect is achieved on the experimental table of a 2D reciprocating compressor.

Angular Position Control of Fluid-Driven Spindle

2009 ◽  
Author(s):  
Yohichi Nakao ◽  
Naoya Asaoka
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Steady State ◽  
Disturbance Observer ◽  
Position Control ◽  
Angular Position ◽  
Experimental Results ◽  
The Mathematical Model ◽  
Position Control System ◽  
State Error

A precise spindle is essential to achieve precision machining, such as diamond turning. A fluid driven spindle supported by hydrostatic bearings was thus designed and tested. A feature of the spindle is that several flow channels are designed in its rotor so that driving torque can be generated by supplying pressurized flow into the channels. Rotational speed of the spindle can be controlled by the flow rate. In addition, the rotational direction of the spindle can be controlled by switching supply ports. Thus angular position control of the spindle is achieved by designing appropriate feedback controller. In the present paper, mathematical model of the spindle was thus derived in order for designing an angular position control system. Then spindle characteristics calculated by the mathematical model were compared with experimental results. Furthermore, the angular position control system that has a disturbance observer in its feedback loop was designed based on the mathematical model. The performance of the designed control system was experimentally investigated through the step response. Experimental results verified that the designed controller minimizes the steady state error of angular position of the spindle. Consequently, the steady state error was comparable with the resolution of the rotary encoder, 0.018 degree. In particular, the experimental results indicated that the disturbance observer effectively reduced the influence of various load torque on the angular position of the spindle.

Performance Study of Solar Trough Tracking Control System

2014 ◽  
Vol 541-542 ◽  
pp. 1433-1437 ◽  
Author(s):  
Hai Li Li ◽  
Cheng Mu Xu ◽  
Xu Ji ◽  
Ming Li ◽  
Li Jun Tan
Keyword(s):  
Control System ◽  
Thermal Efficiency ◽  
Tracking Control ◽  
Tracking System ◽  
Experimental Results ◽  
One Dimension ◽  
Performance Study ◽  
Tracking Accuracy ◽  
Solar Tracking ◽  
The Relationship

In this paper, the tracking accuracy of one-dimension north-south solar tracking system is analyzed. The method of indirectly measuring one-dimension north-south solar tracking system is given according to the variation of sun position, and the relevant formulas are derived. The experiment on measuring the relationship between tracking accuracy and thermal efficiency of trough system is also conducted. Experimental results show that the system tracking deviation is 0.04 0.065°; the peak of tracking deviation of trough system is 0.875°.

Research on Grasping Force of New Type Pneumatic Flexible Finger

2013 ◽  
Vol 401-403 ◽  
pp. 245-249
Author(s):  
Yun Wei Zhao ◽  
De Xu Geng ◽  
Xiao Min Liu ◽  
Jin Tao Zhang
Keyword(s):  
Mathematical Model ◽  
Modular Design ◽  
Normal Pressure ◽  
Experimental Results ◽  
Flexible Joints ◽  
Grasping Force ◽  
New Type ◽  
The Mathematical Model ◽  
The Relationship ◽  
Theoretical Results

This paper develops a new type of flexible finger employing the pneumatic flexible joints base on the modular design concept. In this work, the mathematical model of the grasping force of the flexible finger is derived and analyzed on the relationship between the air pressure and the grasping force. Further the grasping force experiments of finger using dynamometer and acquire the normal pressure of the finger with different combinations ventilation of joints are conducted, Also, the experimental results are compared with the theoretical results, which confirm the validity of the presented model.

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