Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 79 for “"stepper"”.
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The design and application of servo systems using stepper motors
… essentially analogue in nature. Developments in stepper motors and semiconductor techniques have resulted in digitisation being possible. This thesis describes the stepper motor, its performance, and its application to position control systems in which the error signal is of a single polarity and …
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Time-optimal motion control of two-dimensional linear stepper motors
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1993.
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Dynamics modeling and analysis of a Sawyer linear stepper motor
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1993.
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Spring Stepper: a makerspace controller for seated hands-free locomotion in virtual reality
… systems. This thesis presents the Spring Stepper, a hands-free, consumer-level seated VR locomotion controller. The presented system is created with open- source readily available development tools, commonly known as "makerspace" tools, such as 3D printing and Arduino, an open electronics …
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Physiological and Metabolic Responses to Constant-Load Exercise on an Inclined Stepper and Treadmill
… (TM) and the CardiosquatTM 1650 LETM inclined stepper by StairMasterTM (SM) during constant-load exercise. The slow component of VO2 (SC) was a central variable assessed during exercise. Twenty-two healthy college-aged (18-30) subjects completed an incremental TM and SM exercise test to …
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Estimation of stability reliability for determination of peak VO₂ in young adults on an inclined stepper and treadmill
The inclined stepper is a novel piece of exercise equipment that is designed to offer precise control over a wide range of loading levels and exercise speeds by simulating an inclined stepping motion (21). The purpose of this study was to evaluate the relationship and test-retest reliability of the …
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Modelling and control of a hybrid stepping motor
… of a microprocessor and a medium power stepper motor in one control system brings together two quite different disciplines. Various methods of interfacing are examined and the problems involved in both hardware and software manipulation are investigated. Microprocessor open-loop control …
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Computer integrated manufacture of complex dies for drawing n-circular wires.
… of four axes. A prototype rig motivated by four stepper motors and controlled by a micro-computer has been designed and manufactured for the fulfilment of this idea. On the basis of experimental evidence, it is apparent that the idea is applicable in the VEDM process. Several die shapes were …
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The effect of supplementary Elliptical training protocols on running performance in trained runners
… responses between the elliptical trainer, stepper, and treadmill, and a decrease in muscular effort of lower extremity muscles when exercising at similar intensities on the elliptical trainer and stepper in comparison to treadmill running. It was therefore suggested that the elliptical …
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Demonstration of Vulnerabilities in Globally Distributed Additive Manufacturing
… control signals along wires to the printer's stepper motors. The transmission along these wires is no longer encrypted. If the signals along the wires are read, the motion of the motor can be analyzed, and G-Code can be reverse engineered. This thesis demonstrates such a threat through a …
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Scales modified for use on board the human centrifuge in the MIT Man Vehicle Lab
… gravity. These were mounted on board a stair stepper exercise device to measure the forces exerted at the feet of subjects while exercising. Exercise is particularly important in preventing microgravity-induced deconditioning of the body and without exercise a deconditioned subject might not …
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Design of a re-configurable test stand for a multi degree of freedom compliant robot prototype
… on the robot's DOF, the final design utilizes a stepper motor and a counterweighted pulley system to apply a compressive force through a single monofilament line. The test stand can accommodate prototypes up to 25 cm in length, and can apply a compressive force up to 6.5N with a resolution of …
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Design and development of a precision packing stage and master control system for an automated vial packaging machine
… TM] Leonardo with externally integrated stepper motor controllers. Finally, a machine vision system was integrated to provide information on product packaging quality and machine performance metrics.
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Steptorials : stepping through complex applications
… structure of a reversible programming language stepper, allowing the user to step over, step back over, or step into any instruction. Further, the user may choose, at any time, to be shown how to do a step, be guided through it, or to use the application interface without constraint. This allows …
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A method for in situ SEM fracture studies of brittle materials using the double torsion technique : application to nuclear graphite
… still providing free rotation of the attached stepper motor. Crack growth rates of down to 19nm/s were directly observed in PMMA specimens. It was concluded that the technique displayed merit in its ability to contribute to the knowledge base of slow cracking and damage development in brittle …
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Control of the hybrid engine of the REMUS 600
… code that allows the user to easily control the stepper motors that attach to each valve. Then, the engine was to be started, brought up to an ideal speed, and stabilized. All these processes were done through a PIC C compiler and a microcontroller. Testing revealed that it took 10.3 +/- 0.2 and …
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Tailoring Artificial Muscles for the Design and Development of Soft Underwater Robots
… to current conventional actuators such as stepper motors and pnuematic systems, artificial muscles play a vital role in soft robotics due to their compliance, high strain, light weight, and low noise. Second, we show the design and testing of a fully functioning jellyfish like robot …
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Debris Characterization And Mitigation Of Droplet Laser Plasma Sources For Euv Lithography
… than 32 nm. The optics to be used in the EUVL steppers is reflective optics with multilayer mirror coatings on each surface. The wavelength of choice is 13.5 nm determined by the optimum reflectivity of the mirror coatings. The light source required for this wavelength is derived from a …
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Methods for Increasing Sensitivity and Throughput of Solid-State NMR Spectroscopy of Pharmaceutical Solids
… being shuttled through the magnet bore with a stepper motor, and exhibited signal to noise ratio (SNR) values comparable to current probes. Pharmaceutical relevance was demonstrated by acquiring spectra of ibuprofen and aspirin simultaneously. 19F SSNMR was used to examine low-level amorphous …
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