A generalised solution for generating stepper motor speed profiles in real time

Mechatronics ◽  
2013 ◽  
Vol 23 (5) ◽  
pp. 541-547 ◽  
Author(s):  
P.J. Siripala ◽  
Y. Ahmet Sekercioglu
Keyword(s):  
Real Time ◽  
Stepper Motor ◽  
Motor Speed

STEPPER MOTOR SPEED PROFILE GENERATION IN REAL-TIME SYSTEMS

2020 ◽  
pp. 63-71
Author(s):  
N. Provatorov ◽  
I. Ovcharuk
Keyword(s):  
Real Time ◽  
High Speed ◽  
Adaptive Design ◽  
Automatic Generation ◽  
Stepper Motor ◽  
Necessary Condition ◽  
Speed Profile ◽  
Motor Speed ◽  
Production Safety ◽  
Improved Model

With the development and distribution of embedded control systems for industrial and household equipment, the generation of speed trajectories for systems controlled by motors, other rotary mechanisms and units remains an urgent task. Adjusting the acceleration profile improves the quality of the system, and the use of adaptive design of automatic controls theoretically increases the speed of work. Implementation of compulsory software control of the speed profile or its automatic generation, according to the current parameters of the system, reduces the risks associated with the human factor and protects the system from operator inaccuracy. Reducing the factor of undesirable interference and creating a model of controlled environment increases the level of production safety, therefore, improving and modernizing the existing approach to managing high-speed industrial systems is a necessary condition for its further development. This article proposes to consider an improved model of a software speed controller that controls the pulse driver of a stepper motor. Based on existing research and corporate solutions during production development used experimentally the adaptive design of the state machine of the system, makes it possible to vary the speed of rotation of the stepper motor during the operation of the system in real time.

Autonomous Control of Abrasive Flow Precision Machining

2011 ◽  
Vol 215 ◽  
pp. 384-388
Author(s):  
J.L. Xu ◽  
Shi Ming Ji ◽  
Z.P. Fang
Keyword(s):  
Real Time ◽  
Control Program ◽  
Autonomous Control ◽  
Network Communication ◽  
Precision Machining ◽  
Motor Speed ◽  
Communication Structure ◽  
Quality And Reliability ◽  
Autonomous Nodes ◽  
Program Reliability

Autonomous nodes distribution, including their relations, real time quality and network communication in abrasive flow precision machining (AFPM) was studied. Autonomous nodes are arranged according to their function. Control program of motor speed is copied into liquid level nodes, pressure nodes, temperature nodes, flux nodes and input/output nodes. If nodes failure has happened, competition algorithm is enabled automatically to select a new node to run important program. Reliability of autonomous control system can be calculated utilizing the formula derived from probability theory. ARM 9 embedded systems with 32 bit CPU and real time embedded operating system are adopted to realize real time quality and reliability of nodes which run independently. CAN field bus and message type flag are used in network communication structure to ensure the real time quality and reliability of nodes connection. Results reveal that using autonomous decentralized control in AFPM possesses not only the characteristic of real time quality, but also the online fault tolerance, which can ensure that system runs continuously even if some nodes break down. The method can avoid system destruction and improve whole system reliability.

Architecture for 3D Scanning Based Automatic Spraying Machine

2011 ◽  
Vol 464 ◽  
pp. 65-69
Author(s):  
Zi Qiang Zhou ◽  
Jing Hu Yu
Keyword(s):  
Real Time ◽  
Motion Control ◽  
Structured Light ◽  
3D Scanning ◽  
Stepper Motor ◽  
Work Piece ◽  
Control Board ◽  
The Real ◽  
Bottle Neck ◽  
Labor Consuming

Nowadays, the generally used automatic spraying machines are only suitable for mass products or components. The usage for multi-type and small-batch products is much limited for its time and labor consuming off-line programming. So this paper present a 3D scanning based 4-axies driving automatic spraying machine to overcome the bottle-neck of programming. By the laser installed under the horizontal slid table of the machine a linear structured light is projected on the surface of the work piece. Besides, two cameras are also symmetrically installed on the side of the laser to acquire the image. The real-time images of the camera are acquired into the computer by the image acquisition board. And then a program will process the images and output the featured point of the work pieces. According to these points, a specially designed algorithm based on the spraying principle will find out the trajectory of the spraying gun. Finally, through the PCI based motion control board, the controlling pulses are sending to the controller of the stepper motor. Then the spraying gun can move along the trajectory to painting the work piece.

scholarly journals REAL-TIME MISSED SEEDING MONITORING PLANTER BASED ON RING-TYPE CAPACITANCE DETECTION SENSOR

2021 ◽  
pp. 279-288
Author(s):  
Kaikang Chen ◽  
Bo Zhao ◽  
Liming Zhou ◽  
Lili Wang ◽  
Yahui Wang ◽  
...  
Keyword(s):  
Real Time ◽  
Production Cost ◽  
Can Bus ◽  
Leakage Rate ◽  
Stepper Motor ◽  
Maximum Relative Error ◽  
Labor Costs ◽  
Manual Operation ◽  
Capacitance Detection

In order to improve the quality of corn sowing and fertilizer utilization, reduce labor costs, this paper aimed at the traditional tillage fertilizer machine to improve. The seeding and fertilizing machine with adjustable flow is designed by integrating particle fertilizer sensor and CAN bus transmission technology. It is mainly composed of seed and fertilizer discharging mechanism, ditch and soil covering mechanism, and leakage seeding and blockage monitoring system. Fertilizer drop signal can be obtained in real time by detecting the flow sensor outside the fertilizer discharge pipe. The speed of the stepper motor can be adjusted after signal processing, which can also realize the alarm of missing sowing and blocking light, and realize the precise variable sowing. The field experiment results show that the maximum relative error of seed leakage rate monitoring is 3.75%, and the alarm accuracy of fertilizer clogging is high. This machine can reduce the intensity of manual operation, and the quality of operation can be effectively monitored and controlled, can effectively reduce the production cost, has better practicability and economy.

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