Fig. 10.

Example response of the three-homeostat system in response to a challenge is initiated at 500 t.u in the reference signal (h1) of the entraining homeostat (v1). As the primary effectors fail, the compensatory effectors activate to compensate. When both fail, the error becomes large causing v1 and v3 to fail to follow their reference signals. The second homeostat (v2) does not necessarily fail to follow its reference signal, but, by design, follows a reference signal from v1 that has flatlined due to its own effector failure.