摘要
为了给控制系统提供一个纯超前的相角,提出了一种再置控制器。再置控制是指当输入过零时积分器的状态就被置零。所提出的再置控制器是一个一阶的再置环节(FORE)加一个补偿器。采用描述函数分析了再置控制器的频率响应,指出所给出的再置控制器可以在所要求的频段上提供一个大的正相角而增益特性保持为0 dB/dec,所以再置控制器更适合于用来补偿控制回路中的纯相位滞后。作为再置控制器的应用实例,研究了船舶的舵减摇系统。从舵角到横摇之间的动态特性是一种非最小相位系统的特性,所以用再置控制器来补偿这个由非最小相位零点造成的大相角滞后。减摇系统的仿真结果验证了这种迟后补偿的有效性。
A reset controller was proposed to provide a pure phase advance for control systems. Reset control means that the state of an integrator is forced to zero whenever the input is zero. The proposed reset controller is a first-order reset element （FORE） in combination with a compensator. The frequen- cy response of the reset controller was analyzed by using the describing function. It is shown that the proposed reset controller provides a large positive phase lead with a 0-dB/dec gain over a desired fre- quency band. So it is preferable to use the reset controller to compensate a pure phase lag in the control loop. The rudder roll stabilization problem was used as an application example for the reset control. The dynamics representing the roll response to rudder was modelled by a nonminimum-phase system. The reset controller was used here to compensate the large phase lag caused by the nonminimum-phase zero. Simulation results of the roll reduction test and verify the effectivenss of such compensation.
出处
《电机与控制学报》
EI
CSCD
北大核心
2013年第8期85-90,共6页
Electric Machines and Control
基金
黑龙江省博士后科研启动金(LBH-Q09126)
中央高校基本科研业务费专项资金(HEUCF041309)
国家自然科学基金(61304076)
关键词
再置控制
描述函数
舵减摇
非最小相位零点
reset control
describing function
rudder roll reduction
nonminimum-phase zero
