Cryogenic stepper motors for infrared astronomical instrumentation

1993 ◽  
Author(s):  
Sandro Gennari ◽  
Filippo Mannucci ◽  
Leonardo Vanzi
Keyword(s):  
Astronomical Instrumentation ◽  
Stepper Motors

Low-cost MSI controller for stepper motors

1991 ◽  
Vol 17 (1) ◽  
pp. 63-66 ◽  
Author(s):  
Faisal Fadul ◽  
K. Weidenboerner
Keyword(s):  
Low Cost ◽  
Stepper Motors

OPTIMISATION OF AVERAGE FORCES IN VR STEPPER MOTORS

1978 ◽  
Vol 2 (3) ◽  
pp. 293-303
Author(s):  
V. V. ATHANI ◽  
S. K. KHURANA
Keyword(s):  
Stepper Motors

Development of non-hybridised HgCdTe detectors for the next generation of astronomical instrumentation

2008 ◽  
Author(s):  
Gavin B. Dalton ◽  
Peter N. Dennis ◽  
David J. Lees ◽  
David J. Hall ◽  
John W. Cairns ◽  
...  
Keyword(s):  
Next Generation ◽  
Astronomical Instrumentation

Shape memory alloys for astronomical instrumentation: space and ground-based applications

2012 ◽  
Author(s):  
M. Riva ◽  
D. Rigamonti ◽  
F. Zanetti ◽  
F. Passaretti ◽  
E. Villa ◽  
...  
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Astronomical Instrumentation

scholarly journals Reference trajectory tracking for a multi-DOF robot arm

2015 ◽  
Vol 25 (4) ◽  
pp. 513-527 ◽  
Author(s):  
Róbert Krasňanský ◽  
Peter Valach ◽  
Dávid Soós ◽  
Javad Zarbakhsh
Keyword(s):  
Data Exchange ◽  
Iterative Solution ◽  
Reference Trajectory ◽  
Robot Arm ◽  
Task Space ◽  
Joint Configuration ◽  
Matlab Simulink ◽  
Stepper Motors ◽  
Homogeneous Transformation Matrix ◽  
Kinematic Transformation

Abstract This paper presents the problem of tracking the generated reference trajectory by the simulation model of a multi-DOF robot arm. The kinematic transformation between task space and joint configuration coordinates is nonlinear and configuration dependent. To obtain the solution of the forward kinematics problem, the homogeneous transformation matrix is used. A solution to the inverse kinematics is a vector of joint configuration coordinates calculated using of pseudoinverse Jacobian technique. These coordinates correspond to a set of task space coordinates. The algorithm is presented which uses iterative solution and is simplified by considering stepper motors in robot arm joints. The reference trajectory in Cartesian coordinate system is generated on-line by the signal generator previously developed in MS Excel. Dynamic Data Exchange communication protocol allows sharing data with Matlab-Simulink. These data represent the reference tracking trajectory of the end effector. Matlab-Simulink software is used to calculate the representative joint rotations. The proposed algorithm is demonstrated experimentally on the model of 7-DOF robot arm system.

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