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RISS 인기검색어
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- 주제어 : acceleration and deceleration algorithm (검색결과 2 건)
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Application of the Improved S-Curve Algorithm in the Speed Control of Shuttle Vehicle
Zhang Helong,Shang Qinghua,Zhao Xinyue,Wang Su 보안공학연구지원센터 2016 International Journal of Multimedia and Ubiquitous Vol.11 No.8
The Smooth of the shuttle vehicle speed control system is the guarantee of the safe operation of the car body, the current shuttle vehicle parking in the start acceleration and deceleration will happen when the shaking phenomenon, It reduces the shuttle car shelf system security and stability. The S-curve to add and subtract in the simplified method is applied to speed regulation system of shuttle car, can reduce the occurrence of this phenomenon. But the S-curve algorithm without considering the bodies weight and load change on the result of speed regulation. In this paper, we improve the S-curve and speed reduction algorithm. Considering the factor of the weight of the vehicle and the load factor, realize the smooth control of shuttle car. This paper introduces the method and principle of the speed control of shuttle car. An improved method for calculating the S curve acceleration and deceleration is presented. And Matlab simulation is carried out. Results of simulation and actual equipment show that the improved algorithm can control the smooth running of the shuttle vehicle.
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고속가공을 위한 2단계 모션 제어 루프와 선독 알고리즘의 구현
이철수,이제필 韓國工作機械學會 2000 한국생산제조학회지 Vol.9 No.6
This paper describes a look ahead algorithm of PC- NC(personal computer numerical control). The algorithm is based on acceleration/deceleration before interpolation which doesn't include a command error and determines a feedrate value at the end point of each block(or start point of each block). The algorithm is represented as following; 1) calculating two maximum arrival feedrates (F_1, F_2) by an acceleration value, a command feedrate, and the distance of a NC block, 2) get-ting a tangent feedrate (F_3) of the adjacent blocks, 3) choosing a minimum value among these three feedrates, and 4) set-ting the value to a feedrate of a start point of the next block(or a end point of the previous block). The proposed look ahead algorithm was implemented and tested by using a commercial RTOS(real time operation sys-tern) on the MS-Windows NT 4.0 in a PC platform. For interfacing to a machine, a counter board, a DAC board and a DIO board were used. The result of the algorithm increased a machining precision and a machining speed in many short blocks.
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