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- function [Xk, Pk, Kk] = kalman(Phikk_1, Qk, Xk_1, Pk_1, Hk, Rk, Zk)
- if nargin<7 % 仅进行状态递推
- Xk = Phikk_1*Xk_1;
- Pk = Phikk_1*Pk_1*Phikk_1'+Qk;
- else % 有测量时滤波
- Xkk_1=Phikk_1*Xk_1;
- Pkk_1 = Phikk_1*Pk_1*Phikk_1' + Qk;
- Pxz = Pkk_1*Hk';
- Pzz = Hk*Pxz + Rk;
- Kk = Pxz*Pzz^-1;
- Xk = Xkk_1 + Kk*(Zk-Hk*Xkk_1);
- Pk = Pkk_1 - Kk*Pzz*Kk';
- end