Review of Research on Carbon-free Car
Abstract. studied comprehensively from the scheme design and innovative design, mathematical modeling, research methods and other aspects of carbon-free car, discussed the research content and distribution characteristics of literature, summed up the general scheme and innovative design of carbon-free car, It provides a certain reference value for the design and research of carbon-free car.
1 Introduction
“Carbon-free car” is one of the national college engineering comprehensive ability training contest theme, the design requirements of a gravity potential driving direction control function car, the game requires the car to S shape and figure 8 around the obstacle. Since the competition, teachers and student in many colleges and universities begin to study the car without carbon, and published a series of research papers. The schematic diagram of the car is shown in Figure1,and the energy of its driving and turning is based on the energy conversion principle, by a given gravitational potential energy is converted obtained. The given gravity potential energy is supplied by the standard weight of 1Kg, The drop height of the weight is 400 2mm. The standard weight is always carried by the trolley, and it is not allowed to fall from the car.
Figure 1. Schematic diagram of carbon- free car
In the 'S' type track game, produce a 'S' type obstacle track spacing values within the range of 700-1300mm. The competition car can automatically bypass the obstacle when the track is on the line, as shown in Figure
2. The obstacle is the round rod of the diameter of 20mm,high 200mm, placed equidistant along the track center line. Track width of 2 meters, starting from the end of the spacing between the first obstacle and the obstacles and barriers are the same. The competition results are determined by the distance of the car and the number of successful bypassing obstacles.
Figure 2.the car around the S shaped track running
In the '8' shape track, the car running around two obstacles according to the figure 8 in half sheets of standard table tennis table (length 1525mm, width 1370mm) Obstacle diameter of 20mm, length of 200mm 2 rod, placed some distance apart in half a sheet of standard table tennis table in the line, the distance is within the range of 300 ~ 500mm. The final result depends on how many laps the car is accomplished, as shown in Figure 3.
Figure 3. Ping-pong table and the obstacles set Figure
From the analysis of the number of documents: the study of S car obstacle avoidance research for more than 8 'car obstacle avoidance, the main reason is the figure 8 car is new projects. From the specific content of the literature, there are three main categories, namely general solution of car, steering and transmission system research,study on the steering system, a considerable amount of literature on the three aspects. According to the literature research, will be discussed from the following aspects.
2 Research and innovation design of the scheme
By functional analysis of the car, the car needs to complete the conversion of gravitational potential energy, drive, walk itself automatically avoid obstacles. To facilitate the design of this car to be completed according to the function of the modular design of the car is divided into six parts (frame, original mechanism, transmission,steering mechanism, running gear, fine adjustment mechanism). In order to obtain a satisfactory solution in extended thinking design of each module, to seek a variety of possible solutions and ideas. The function module of the car and implementation plans as shown in Figure 4.
Figure 4. The function module of the car and implementation plans
From the analysis of specific programs: car driving mechanism commonly used rope wheel mechanism; transmission structure is widely used gear transmission for its high efficiency; driving mode is mainly driven by a single wheel steering mechanism; in the S- car more using the crank rocker mechanism, and in the 8 shaped car obstacle avoidance, mainly to achieve more based on incomplete gear and cam mechanism; adjustment mechanism mainly adopts trimming nut and sliding mechanism; in addition, some local programs have been used in innovative design, mainly:
Liu Run [1] in order to restrict the front wheel steering angle, the spring constraint is added to the
S type car steering mechanism,
Ji Yuan-jiang [2] used the change gear as the driving mechanism of the S shape car, so that the formation of the speed difference driven moving by simple harmonic wave track wheel.
Wu Zhao-chun[3] used a crank connecting rod mechanism as the guiding mechanism of the S shape car, and put the ordinary bearing and a one-way needle bearing with the use of rear wheel drive and ensure the implementation of alternative vehicle stability.
Ceng Si-long[4] used slider crank steering mechanism in the front wheel of the S shape car for matching angle and the rear wheel steering speed, the characteristics of slider crank mechanism itself cleverly used, to avoid the car to the rear differential steering error.
Wen Wei-song [5] had made a comparative analysis of the cam mechanism, to achieve car steering eccentric mechanism, crank rocker mechanism and transmission gear mechanism, synchronous belt mechanism and a chain wheel mechanism, the final selection of the crank rocker mechanism and sprocket mechanism respectively as steering and transmission mechanism of the S type car.
Zou Guang-ming [6] used ascroll spring storage in the S shape car, the storage part of the gravitational potential energy can be transformed into a heavy block mechanism of elastic potential energy, and then converted to kinetic energy to drive the car, and reduce the falling spe
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Review of Research on Carbon-free Car
Abstract. studied comprehensively from the scheme design and innovative design, mathematical modeling, research methods and other aspects of carbon-free car, discussed the research content and distribution characteristics of literature, summed up the general scheme and innovative design of carbon-free car, It provides a certain reference value for the design and research of carbon-free car.
1 Introduction
“Carbon-free car” is one of the national college engineering comprehensive ability training contest theme, the design requirements of a gravity potential driving direction control function car, the game requires the car to S shape and figure 8 around the obstacle. Since the competition, teachers and student in many colleges and universities begin to study the car without carbon, and published a series of research papers. The schematic diagram of the car is shown in Figure1,and the energy of its driving and turning is based on the energy conversion principle, by a given gravitational potential energy is converted obtained. The given gravity potential energy is supplied by the standard weight of 1Kg, The drop height of the weight is 400 2mm. The standard weight is always carried by the trolley, and it is not allowed to fall from the car.
Figure 1. Schematic diagram of carbon- free car
In the 'S' type track game, produce a 'S' type obstacle track spacing values within the range of 700-1300mm. The competition car can automatically bypass the obstacle when the track is on the line, as shown in Figure
2. The obstacle is the round rod of the diameter of 20mm,high 200mm, placed equidistant along the track center line. Track width of 2 meters, starting from the end of the spacing between the first obstacle and the obstacles and barriers are the same. The competition results are determined by the distance of the car and the number of successful bypassing obstacles.
Figure 2.the car around the S shaped track running
In the '8' shape track, the car running around two obstacles according to the figure 8 in half sheets of standard table tennis table (length 1525mm, width 1370mm) Obstacle diameter of 20mm, length of 200mm 2 rod, placed some distance apart in half a sheet of standard table tennis table in the line, the distance is within the range of 300 ~ 500mm. The final result depends on how many laps the car is accomplished, as shown in Figure 3.
Figure 3. Ping-pong table and the obstacles set Figure
From the analysis of the number of documents: the study of S car obstacle avoidance research for more than 8 'car obstacle avoidance, the main reason is the figure 8 car is new projects. From the specific content of the literature, there are three main categories, namely general solution of car, steering and transmission system research,study on the steering system, a considerable amount of literature on the three aspects. According to the literature research, will be discussed from the following aspects.
2 Research and innovation design of the scheme
By functional analysis of the car, the car needs to complete the conversion of gravitational potential energy, drive, walk itself automatically avoid obstacles. To facilitate the design of this car to be completed according to the function of the modular design of the car is divided into six parts (frame, original mechanism, transmission,steering mechanism, running gear, fine adjustment mechanism). In order to obtain a satisfactory solution in extended thinking design of each module, to seek a variety of possible solutions and ideas. The function module of the car and implementation plans as shown in Figure 4.
Figure 4. The function module of the car and implementation plans
From the analysis of specific programs: car driving mechanism commonly used rope wheel mechanism; transmission structure is widely used gear transmission for its high efficiency; driving mode is mainly driven by a single wheel steering mechanism; in the S- car more using the crank rocker mechanism, and in the 8 shaped car obstacle avoidance, mainly to achieve more based on incomplete gear and cam mechanism; adjustment mechanism mainly adopts trimming nut and sliding mechanism; in addition, some local programs have been used in innovative design, mainly:
Liu Run [1] in order to restrict the front wheel steering angle, the spring constraint is added to the
S type car steering mechanism,
Ji Yuan-jiang [2] used the change gear as the driving mechanism of the S shape car, so that the formation of the speed difference driven moving by simple harmonic wave track wheel.
Wu Zhao-chun[3] used a crank connecting rod mechanism as the guiding mechanism of the S shape car, and put the ordinary bearing and a one-way needle bearing with the use of rear wheel drive and ensure the implementation of alternative vehicle stability.
Ceng Si-long[4] used slider crank steering mechanism in the front wheel of the S shape car for matching angle and the rear wheel steering speed, the characteristics of slider crank mechanism itself cleverly used, to avoid the car to the rear differential steering error.
Wen Wei-song [5] had made a comparative analysis of the cam mechanism, to achieve car steering eccentric mechanism, crank rocker mechanism and transmission gear mechanism, synchronous belt mechanism and a chain wheel mechanism, the final selection of the crank rocker mechanism and sprocket mechanism respectively as steering and transmission mechanism of the S type car.
Zou Guang-ming [6] used ascroll spring storage in the S shape car, the storage part of the gravitational potential energy can be transformed into a heavy block mechanism of elastic potential energy, and then converted to kinetic energy to drive the car, and reduce the falling spe
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