Analysis of competition control questions

sigma

Analysis of competition control questions [Copy link]

"Control" is a major category in the National Undergraduate Electronic Design Competition. In the 11 electronic design competitions, "Control" has been included in every competition except 1994, 1995 and 1999, with a total of 15 questions, second only to "Instrumentation" (16 questions). The previous "Control" competition questions are as follows:

1. Water Temperature Control System (3rd session, Topic C, 1997)
2. Automatic Round Trip Electric Car (5th session, 2001, Topic C)
3. Simple Intelligent Electric Vehicle (6th session, 2003, Topic E)
4. Liquid dripping speed monitoring device (6th session, 2003, topic F)
5. Suspension Motion Control System (7th, 2005 Topic E)
6. Electric car seesaw (8th session, 2007, topic F, undergraduate group)
7. Electric vehicle seesaw (8th session, 2007 J topic, higher vocational and technical college group)
8. Voice Guidance System (9th session, 2009, Topic B, Undergraduate Group)
9. Simulation of street light control system (9th session, 2009, Topic I, Higher Vocational and Technical College Group)
10. Tablet control system based on free pendulum (10th session, 2011, Topic B, undergraduate group)
11. Smart Car (10th session, 2011, Topic C, Undergraduate Group)
12. Windsurfing control system (10th session, 2011, Topic F, Higher Vocational and Technical College Group)
13. Quadrotor Autonomous Flying Vehicle (11th session, 2013, Topic B, Undergraduate Group)
14. Simple Rotating Inverted Pendulum and Control Device (11th session, 2013, Topic C, Undergraduate Group)
15. Electromagnetic Controlled Motion Device (11th session, 2013, Topic J, Higher Vocational and Technical College Group)

From the previous "control" competition questions, we can see that in the "control" competition questions, the control object has developed from one to multiple (for example, in 2011 question C, the smart car is required to control 2 electric cars), from the ground to the sky (for example, in 2013 question B, the four-rotor autonomous aircraft), and from single-direction, single-axis motion to multi-direction, multi-axis motion (for example, in 2013 question C, the simple rotating inverted pendulum and control device). Among these 15 competition questions, there are 7 questions related to electric cars in 6 sessions.

The requirements of the competition questions are getting higher and higher, for example:

① Quadrotor Autonomous Flying Vehicle (11th session, 2013, Topic B, Undergraduate Group)

Design and build a quadcopter autonomous aircraft that can fly in the designated flight area according to the requirements of the competition. The quadcopter autonomous aircraft can fly from area A to area B, land and stop with one click, and the flight time is no more than 45 seconds. Fly from area B to area A, land and stop with one click, and the flight time is no more than 45 seconds. The aircraft is placed in area A, and a piece of iron is placed under the aircraft. It is started with one click. The aircraft picks up the iron piece and flies from area A to area B, maintains a certain height, and throws the iron piece to area B, and returns to area A to land and stop. The flight time is no more than 30 seconds.

② Simple Rotating Inverted Pendulum and Control Device (11th session, 2013, Topic C, Undergraduate Group) Design and make a simple rotating inverted pendulum and control device. The structure of the rotating inverted pendulum is shown in Figure 7.1.1. The motor A is fixed on the bracket B and drives the rotating arm C to rotate through the rotating shaft F. The pendulum E is fixed to one end of the rotating arm C through the rotating shaft D. When the rotating arm C is driven by the motor A to make a reciprocating rotation, it drives the pendulum E to rotate freely in a plane perpendicular to the rotating arm C.

"System control scheme and algorithm design" is the focus of control competition questions. For different competition questions, the control objectives and requirements are different, and their "system control scheme and algorithm design" are also different. And "system control scheme and algorithm design" is often one of the keys to determine whether the competition question can be successful. During the training process, you can choose some previous competition questions and do them appropriately. With the deepening and development of the National College Student Electronic Design Competition, the depth and difficulty of the electronic design competition have been greatly improved. In the competition rules, there have also been some changes in the selection of microcontrollers, restrictions on the use of circuit modules, the definition of "minimum system", "cost-effectiveness" and "system power consumption" indicators. According to the current competition rules, some functional modules made during the training process can be used in the competition. It is recommended that during the training process, the basic circuits and functional modules (such as DC motor drive modules, stepper motor drive modules, sensor modules, etc.) that often appear in previous competition questions are designed and made, and the use of these modules is made and mastered to be fully prepared for the competition.

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