中国科学院机构知识库网格系统: 检索

Strength, deformation, and failure characteristics of hollow cylinder sandstone under axial-torsional tests 期刊论文 OAI收割
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT, 2023, 卷号: 82, 期号: 8, 页码: -
作者: Jiang, Yue; Zhou, Hui; Lu, Jingjing; Gao, Yang; Li, Zhen

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收藏 | 浏览/下载：96/0 | 提交时间：2023/08/02

Axial-torsional test Hollow cylinder sandstone Principal stress axis rotation Rock strength Deformation characteristics Crack propagation

Experimental Study of Hollow-cylinder Sandstone Under Constant Mean Stress Considering the Rotation of Principal Stress Axes 期刊论文 OAI收割
ROCK MECHANICS AND ROCK ENGINEERING, 2023, 卷号: -, 期号: -, 页码: -
作者: Jiang, Yue; Zhou, Hui; Lu, Jingjing; Gao, Yang

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收藏 | 浏览/下载：11/0 | 提交时间：2023/08/02

Constant mean stress test Principal stress axes rotation Hollow-cylinder sandstone Complex stress path Mechanical properties

Distribution patterns of rock mass displacement in deeply buried areas induced by active fault creep slip at engineering scale 期刊论文 OAI收割
JOURNAL OF CENTRAL SOUTH UNIVERSITY, 2020, 卷号: 27, 期号: 10, 页码: 2849-2863
作者: Zhang, Chuan-qing; Liu, Xiao-yan; Zhu, Guo-jin; Zhou, Hui; Zhu, Yong

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收藏 | 浏览/下载：37/0 | 提交时间：2021/05/25

active faults creep slip displacement distribution patterns discrete element rotation test

Analysis of stress evolution characteristics during TBM excavation in deep buried tunnels 期刊论文 OAI收割
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT, 2019, 卷号: 78, 期号: 7, 页码: 5177-5194
作者: Jiang, Yue; Zhou, Hui; Lu, Jingjing; Gao, Yang; Zhang, Chuanqing

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收藏 | 浏览/下载：32/0 | 提交时间：2020/04/08

TBM excavation Numerical simulation Stress evolution Principal stress rotation Laboratory test technology

Development of a Hollow Cylinder Torsional Apparatus for Rock 期刊论文 OAI收割
ROCK MECHANICS AND ROCK ENGINEERING, 2018, 卷号: 51, 期号: 12, 页码: 3845-3852
作者: Zhou, Hui; Jiang, Yue; Lu, Jingjing; Gao, Yang; Chen, Jun

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收藏 | 浏览/下载：30/0 | 提交时间：2020/04/08

Rock mechanical test Hollow cylinder torsional apparatus Complex stress path Principal stress axis rotation

Research of real-time control and calibration on laser energy simulator for optoelectronic confrontation HWIL system (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Electronics, Communications and Control, ICECC 2011, September 9, 2011 - September 11, 2011, Ningbo, China
作者: Wang J.-J.

收藏 | 浏览/下载：20/0 | 提交时间：2013/03/25

In the paper real-time control and calibration on laser energy simulator is studied which is based on Optoelectronic confrontation hardware-in-loop (HWIL) simulation test system. The control of the laser energy is necessary in simulation system and it is vital to make the test successfully. The laser energy simulator simulates the attenuation process and the changing of laser energy by the continuous rotation of Glan prism. To get high accuracy of laser power outdoor the accurate calibration of the rotation position and the attenuation process in energy simulator is necessary. We apply dual calibration on the laser energy simulator and the feasibility was proved by the calibration data. 2011 IEEE.

Layered fractures induced by principal stress axes rotation in hard rock during tunnelling 期刊论文 OAI收割
MATERIALS RESEARCH INNOVATIONS, 2011, 卷号: 15, 页码: S527-S530
作者: Feng, X.; Zhou, H.; Xing, L.; Qiu, S.; Zhang, C.

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收藏 | 浏览/下载：22/0 | 提交时间：2018/06/05

Layered fractures Principal stress axes rotation Stress path Crack propagation True triaxial test

High precision test method for dynamic imaging of space camera (EI CONFERENCE) 会议论文 OAI收割
2010 IEEE International Conference on Advanced Computer Control, ICACC 2010, March 27, 2010 - March 29, 2010, 445 Hoes Lane - P.O.Box 1331, Piscataway, NJ 08855-1331, United States
作者: Jin L.-X.; Zhang K.; Zhang K.; Zhang K.; Zhang K.

收藏 | 浏览/下载：26/0 | 提交时间：2013/03/25

A test method for dynamic imaging of space TDICCD (Time Delay and Integration Charge Coupled Devices) camera was presented in this paper. The test method adopted the PLL (Phase Locked Loop) technology and CMAC (Cerebella Model Articulation Controller) friction compensation as control strategy. Furthermore According to this method a test system for dynamic imaging of space TDICCD camera was designed and implemented. The system simulated the movement of the ground objects relative to the space aerocraft to validate the capability of image speed match and the dynamic imaging quality of TDICCD camera. The design adopted a precision turntable and a drift turntable to simulate the movement around the earth and the drift motion in different latitude due to the rotation of earth of the aerocraft. The turntables were drived by permanent magnet torque motor which was powered by PWM (Pulse Width Modulation). The system adopted DSP (Digital Signal Processor) as the control core and reached a very high performance. The experimental results showed that the steady speed error was better than 0.01 % and the instantaneous speed error reached 0.0267%. The precision of the test system designed met the requirement for dynamic imaging of TDICCD camera. 2010 IEEE.

Gimbal displacement error analysis on an electro-optical seeker (EI CONFERENCE) 会议论文 OAI收割
Optical Design and Testing IV, October 18, 2010 - October 20, 2010, Beijing, China
作者: Zhang X.; Zhang X.; Zhang X.

收藏 | 浏览/下载：35/0 | 提交时间：2013/03/25

It is essential to analyze the gimbal displacement errors for a seeker due to the importance for cueing of targets and tracking for the final approach. Otherwise for a seeker electro-driven with a concentric glass dome the large errors will decrease the picking pointing and tracking precision rooted from the displacement errors existing between the rotation center of the optical system and the gimbal. And the gimbaled camera system displacement errors are never eliminated but reduced due to the geometric errors consists of geometric tolerances of gimbal structure manufacture installation and vibration coming from working environment. In this paper the gimbal displacement errors in an electro-optically stabilized platform resulting from geometric errors and environment errors were analyzed and shown in detail. The mathematical modal of the gimbal displacement errors created based on multi-body dynamics demonstrated the connection between the gimbal displacement errors and the stabilized platform. Taking a visible light image seeker as a case the diameter is 120mm and the geometric tolerances came from the values of primary design and the vibration data came from the environmental vibration test on the pitch-yaw seeker and at the same time the errors resulting from installation were considered too. Based on calculating the maximum gimbal displacement error will reach to 0.2mm for pitching angle smaller than 40 and yawing angle smaller than 60. However the critical parts have been found out according to the probability theory and the reliability analysis successfully used in the paper and finally the maximum gimbal displacement error reduced to 0.1mm which is acceptable corresponding to the picking pointing and tracking precision for an optical imaging seeker. 2010 Copyright SPIE - The International Society for Optical Engineering.

Miniaturize photoelectric stable platform (EI CONFERENCE) 会议论文 OAI收割
2010 International Conference on Computer Application and System Modeling, ICCASM 2010, October 22, 2010 - October 24, 2010, Shanxi, Taiyuan, China
Xue W.-Q.; Wang Y.-Y.; Dai M.

收藏 | 浏览/下载：79/0 | 提交时间：2013/03/25

In order to reduce the size and weight of the gimbal in a traditional stable platform and correct the disadvantage in size of the payload the paper first improves the gimbal which is an important component of a stable photoelectric platform that also is an important factor in affecting the size and weight of a stability platform. In this paper a closed-form solution of 3-DOF manipulator is designed according mechanical arm design principles. This manipulator is formed by a three joint axes whose extended line is intersected at one point. A standard orthogonal coordinate system is set up for each rod in the manipulator. And then rotation transformation matrix expression is obtained. At last in this paper the manipulator arm-shaped method for solving solutions is description and also each parameter of the gimbal is calculated when the photoelectric detection devices at bottom reach the expected position. Test results show that the photoelectric stability platform with gimbal we designed is smaller lighter and simpler than that traditional. Also the packaging and size of the photoelectric will not be affected with this open structure. 2010 IEEE.