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With the development of electronic technology and motor PWM control technology, the electric servo system has gradually changed from analog system to digital system. Closed-loop control cycle is a key parameter in digital servo system, which is restricted by system maneuverability, hardware resources, power supply capacity, function performance and so on. At present,there are few literatures on the closed-loop cycle of servo system at home and abroad. This paper takes servo system of electric actuator as the research object. Firstly, the composition, working principle and signal transmission link of electric actuator servo system are analyzed in detail. Then the mathematical modeling of the servo system of the electric actuator is carried out, and the P-D control law is designed. Then the servo system simulation model is established based on Simulink to analyze the influence of different closed-loop control cycles on the servo system performance. Finally, an experimental platform is built to verify the effects of different closed-loop cycles on servo system performance. The simulation results show that the step response speed decreases with the increase of the closed-loop period. Appropriately increasing the closed-loop period can reduce the transient current to a certain extent,and avoid the risk of computer reset caused by large transient current pulling down the system voltage. The research in this paper has certain guiding significance for servo system and the platform system interacting with them.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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